Protocol Registries
Protocol parameter registries represent the authoritative record of many of the codes and numbers contained in a variety of Internet protocols. We maintain these records in compliance with the associated technical standards and allocation policies, and we provide this service in coordination with the Internet Engineering Task Force (IETF).
To view or download individual protocol registries, navigate to the individual registries through the index below. Registry data is available for bulk retrieval via Rsync (recommended) or FTP.
To obtain a registration in an existing registry, or to modify existing registrations, consult the relevant application form. For information on creating new registries, please see RFC 8126 for guidance.
| Protocol/Registry | Defining Document/Comments |
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| Access Node Control Protocol (ANCP) | |
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| ACL TLS | |
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| Ad Hoc On Demand Distance Vector (AODV) Parameters | |
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| Address Family Numbers | |
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| Address Resolution Protocol (ARP) Parameters | |
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| APEX Parameters | |
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| Application Access Protocol (ACAP) Numbers | |
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| Application Bridging for Federated Access Beyond Web (ABFAB) Parameters | |
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| Application-Layer Traffic Optimization (ALTO) Protocol | |
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| Authenticated Encryption with Associated Data (AEAD) Parameters | |
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RFC 5116
1-32767: Specification Required. 32768-65535: Private Use. David McGrew Bjoern Tackmann Stanislav Smyshlyaev |
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| Authentication and Authorization for Constrained Environments (ACE) | |
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RFC 9200
less than -65536: Private Use. -65536 to -257: Specification Required. -256 to 255: Standards Action. 256 to 65535: Specification Required. greater than 65535: Expert Review. Göran Selander |
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RFC 9594
less than -65536: Private Use. -65536 to -257: Specification Required. -256 to 255: Standards Action With Expert Review. 256 to 65535: Specification Required. greater than 65535: Expert Review. Francesca Palombini Marco Tiloca Rikard Höglund |
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RFC 9594
less than -65536: Private Use. -65536 to -257: Specification Required. -256 to 255: Standards Action With Expert Review. 256 to 65535: Specification Required. greater than 65535: Expert Review. Strings of length 1: Standards Action With Expert Review. Strings of length 2: Specification Required. Strings of length greater than 2: Expert Review. Francesca Palombini Marco Tiloca Rikard Höglund |
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RFC 9594
less than -65536: Private Use. -65536 to -257: Specification Required. -256 to 255: Standards Action With Expert Review. 256 to 65535: Specification Required. greater than 65535: Expert Review. Strings of length 1: Standards Action With Expert Review. Strings of length 2: Specification Required. Strings of length greater than 2: Expert Review. Francesca Palombini Marco Tiloca Rikard Höglund |
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RFC 9594
less than -65536: Private Use. -65536 to -257: Specification Required. -256 to 255: Standards Action With Expert Review. 256 to 65535: Specification Required. greater than 65535: Expert Review. Strings of length 1: Standards Action With Expert Review. Strings of length 2: Specification Required. Strings of length greater than 2: Expert Review. Francesca Palombini Marco Tiloca Rikard Höglund |
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RFC 9594
less than -65536: Private Use. -65536 to -257: Specification Required. -256 to 255: Standards Action With Expert Review. 256 to 65535: Specification Required. greater than 65535: Expert Review. Francesca Palombini Marco Tiloca Rikard Höglund |
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RFC 9594
less than -65536: Private Use. -65536 to -257: Specification Required. -256 to 255: Standards Action With Expert Review. 256 to 65535: Specification Required. greater than 65535: Expert Review. Francesca Palombini Marco Tiloca Rikard Höglund |
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RFC 9200
less than -65536: Private Use. -65536 to -257: Specification Required. -256 to 255: Standards Action. 256 to 65535: Specification Required. greater than 65535: Expert Review. Göran Selander |
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RFC 9770
less than -65536: Private Use. -65536 to -257: Specification Required. -256 to 255: Standards Action With Expert Review. 256 to 65535: Specification Required. greater than 65535: Expert Review. Marco Tiloca Marco Rasori |
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RFC 9770
less than -65536: Private Use. -65536 to -257: Specification Required. -256 to 255: Standards Action With Expert Review. 256 to 65535: Specification Required. greater than 65535: Expert Review. Marco Tiloca Marco Rasori |
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RFC 9203
less than -65536: Private Use. -65536 to -257: Specification Required. -256 to 255: Standards Action With Expert Review. 256 to 65535: Specification Required. greater than 65535: Expert Review. Strings of length 1: Standards Action With Expert Review. Strings of length 2: Specification Required. Strings of length greater than 2: Expert Review. Göran Selander |
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RFC 9594
less than -65536: Private Use. -65536 to -257: Specification Required. -256 to 255: Standards Action With Expert Review. 256 to 65535: Specification Required. greater than 65535: Expert Review. Strings of length 1: Standards Action With Expert Review. Strings of length 2: Specification Required. Strings of length greater than 2: Expert Review. Francesca Palombini Marco Tiloca Rikard Höglund |
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| Authentication and Key Agreement (AKA) | |
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| Authentication Method Reference Values | |
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| Authentication Option Name Spaces | |
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| Authentication, Authorization, and Accounting (AAA) Parameters | |
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| Author Domain Signing Practices (ADSP) Parameters | |
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| Automated Certificate Management Environment (ACME) Protocol | |
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| Automatic Responses to Electronic Mail Parameters | |
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| Autonomic Control Plane (ACP) | |
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| Autonomous System (AS) Numbers | |
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RFC 1930, RFC 5398, RFC 6996, RFC 7249
RIR request to the IANA or IETF Review. Allocated following the Global Policy published at http://www.icann.org/en/resources/policy/global-addressing. |
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| Babel Routing Protocol | |
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RFC 8966
0-223: Specification Required. 224-254: Experimental Use. Juliusz Chroboczek Donald Eastlake |
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RFC 8966
0-111: Specification Required. 112-126: Experimental Use. 128-239: Specification Required. 240-254: Experimental Use. Juliusz Chroboczek Donald Eastlake |
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RFC 8966
0-223: Specification Required. 224-254: Experimental Use. Juliusz Chroboczek Donald Eastlake |
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| Battery Technologies | |
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| BGP Monitoring Protocol (BMP) Parameters | |
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RFC 7854
0-127: Standards Action. 128-250: Specification Required. 251-254: Experimental Use. John G. Scudder Rex Fernando (rex) Paolo Lucente |
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RFC 7854
0-127: Standards Action. 128-250: Specification Required. 251-254: Experimental Use. John G. Scudder Rex Fernando (rex) Paolo Lucente |
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RFC 7854
0-127: Standards Action. 128-250: Specification Required. 251-254: Experimental Use. John G. Scudder Rex Fernando (rex) Paolo Lucente |
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RFC 9736
0, 3-32767: Standards Action. 32768-65530: First Come First Served. 65531-65534: Experimental Use. |
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| BGP Shortest Path First (BGP SPF) | |
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| Bidirectional Forwarding Detection (BFD) Parameters | |
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| Bit Index Explicit Replication (BIER) | |
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| Blocks Extensible Exchange Protocol (BEEP) Parameters | |
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| Bootstrapping Remote Secure Key Infrastructures (BRSKI) Parameters | |
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| Border Gateway Protocol (BGP) Parameters | |
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RFC 9026
0-175: IETF Review. 176-249: First Come First Served. 250-254: Experimental Use. 255: IETF Review. |
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RFC 7153
0x40-0x7f: First Come First Served. 0xc0-0xcf: Reserved for Experimental Use. 0xd0-0xff: Standards Action. |
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draft-ietf-idr-nhc-07
0: Reserved. 1-65399: First Come First Served. 65400-65499: Private Use. 65500-65534: Experimental Use. 65535: Reserved. First Come First Served |
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| Border Gateway Protocol (BGP) Tunnel Encapsulation | |
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RFC 9012
1-63: Standards Action. 64-125: First Come First Served. 126-127: Experimental Use. 128-191: Standards Action. 192-252: First Come First Served. 253-254: Experimental Use. |
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| Border Gateway Protocol - Link State (BGP-LS) Parameters | |
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RFC 9552
0-255: Reserved (not to be allocated). 256-64999: Expert Review. 65000-65535: Private Use. Hannes Gredler (primary) Adrian Farrel (secondary) |
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RFC 9552
1-64999: Expert Review. 65000-65535: Private Use. Hannes Gredler (primary) Adrian Farrel (secondary) |
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RFC 9552
1-199: Expert Review. 200-255: Private Use. Hannes Gredler (primary) Adrian Farrel (secondary) |
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| BPF Instructions | |
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RFC 9669
Permanent: Standards Action or IESG Approval. Provisional: Specification Required. Historical: Specification Required. Alexei Starovoitov David Vernet |
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RFC 9669
Permanent: Standards Action or IESG Approval. Provisional: Specification Required. Historical: Specification Required. Alexei Starovoitov David Vernet |
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| Building Blocks | |
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| Bundle Protocol | |
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RFC 7116
0-63: Specification Required. 1024-65535: Specification Required. Marc Blanchet Keith Scott |
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| C-DNS DNS Capture Format | |
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| Caller-ID Numbering Plans | |
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| Candidate Access Router Discovery (CARD) Parameters | |
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| Captive Portals | |
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| CBOR Object Signing and Encryption (COSE) | |
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RFC 9053, RFC 9054, RFC 9864
Integers less than -65536: Private Use. Integer values from -65536 to -257: Specification Required. Integer values between -256 and 255: Standards Action With Expert Review. Integer values from 256 to 65535: Specification Required. Integer values greater than 65535: Expert Review. Strings of length 1: Standards Action With Expert Review. Strings of length 2: Specification Required. Strings of length greater than 2: Expert Review. Göran Selander Derek Atkins Sean Turner |
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RFC 9053
Integers less than -65536: Private Use. Integer values -65536 to -257: Specification Required. Integer values -256 to 255: Standards Action With Expert Review. Integer values 256 to 65535: Specification Required. Integer values greater than 65535: Expert Review. Göran Selander Derek Atkins Sean Turner |
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RFC 9052
Integers less than -65536: Private Use. Integer values in the range -1 to -65536: delegated to the COSE Header Algorithm Parameters registry. Integer values between 1 and 255: Standards Action With Expert Review. Integer values from 256 to 65535: Specification Required. Integer values greater than 65535: Expert Review. Strings of length 1: Standards Action With Expert Review. Strings of length 2: Specification Required. Strings of length greater than 2: Expert Review. Francesca Palombini Carsten Bormann |
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RFC 9052
Integers less than -65536: Private Use. Integer values in the range -65536 to -1: used for key parameters specific to a single algorithm delegated to the COSE Key Type Parameters registry. Integer values between 0 and 255: Standards Action With Expert Review. Integer values from 256 to 65535: Specification Required. Integer values greater than 65535: Expert Review. Strings of length 1: Standards Action With Expert Review. Strings of length 2: Specification Required. Strings of length greater than 2: Expert Review. Francesca Palombini Carsten Bormann |
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| CBOR Web Token (CWT) | |
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RFC 8392
Integer values from -256 to 255: Standards Action. Integer values from -65536 to -257: Specification Required. Integer values from 256 to 65535: Specification Required. Integer values greater than 65535: Expert Review. Strings of length 1: Standards Action. Strings of length 2: Specification Required. Strings of length greater than 2: Expert Review. Mike Jones Hannes Tschofenig Ludwig Seitz |
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| Centralized Conferencing Manipulation Protocol (CCMP) Parameters | |
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| CERT RR Certificate Types | |
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RFC 4398
0x0000-0x00FF: Standards Action. 0xFF00-0xFFFF: Standards Action. 0x0100-0xFEFF: IETF Review. |
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| Certificate Management Protocol (CMP) | |
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| Channel-Binding Types | |
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| Character Sets | |
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| Cisco Service Level Assurance Protocol | |
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| CoAP-EAP | |
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RFC 9820
-65536..-25: Specification Required. -24..-21: Private Use. -20..23: Standards Action with Expert Review. 24..65535: Specification Required. Marco Tiloca Alan DeKok |
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RFC 9820
0-23: Standards Action with Expert Review. 24-49: Private Use. 50-65000: Specification Required. 65001-65535: Experimental Use. Marco Tiloca Alan DeKok |
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| Common Architecture Label IPv6 Security Option (CALIPSO) | |
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| Common Name Resolution Protocol (CNRP) Parameters | |
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| Common Open Policy Service (COPS) Protocol | |
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| Common Presence and Instant Messaging (CPIM) Headers | |
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| Concise Binary Object Representation (CBOR) | |
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| Concise Data Definition Language (CDDL) | |
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RFC 8610
name includes internal dot: IETF Review. name does not include internal dot: Specification Required. Jeffrey Yasskin Henk Birkholz |
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| Concise Software Identifier (CoSWID) | |
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RFC 9393
0-32767: Standards Action with Expert Review. 32768-4294967295: Specification Required. Charles Schmidt Jessica Fitzgerald-McKay Henk Birkholz |
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| Connectivity Fault Management (CFM) OAM IETF Parameters | |
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| Constrained RESTful Environments (CoRE) Parameters | |
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RFC 7252, RFC 9876
0-255: Expert Review. 256-9999: IETF Review with Expert Review or IESG Approval with Expert Review. 10000-19999: Expert Review. 20000-32999: First Come First Served. 33000-64997: Expert Review. 64998-64999: Reserved for Documentation. 65000-65535: Experimental Use. Esko Dijk (primary) Klaus Hartke (secondary) Carsten Bormann (secondary) Jaime Jimenez (secondary) Alexander Pelov (secondary) |
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RFC 7252
0-255: IETF Review or IESG Approval. 256-2047: Specification Required. 2048-64999: Expert Review. 65000-65535: Experimental use (no operational use). Bilhanan Silverajan (primary) Klaus Hartke (secondary) Carsten Bormann (secondary) Jaime Jimenez (secondary) Alexander Pelov (secondary) |
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RFC 8323
0-255: IETF Review or IESG Approval. 256-2047: Specification Required. 2048-64999: Expert Review. 65000-65535: Experimental use (no operational use). Bilhanan Silverajan (primary) Klaus Hartke (secondary) Alexander Pelov (secondary) |
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RFC 9176
value starts with "core": IETF Review. all other values: Specification Required. Carsten Bormann Jaime Jiménez Christian Amsüss |
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RFC 6690
value starts with "core": IETF Review. all other values: Specification Required. Carsten Bormann Jaime Jimenez Christian Amsüss |
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RFC 6690
value starts with "core": IETF Review. all other values: Specification Required. Carsten Bormann Jaime Jimenez Christian Amsüss |
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| Content Delivery Network Interconnection (CDNI) Parameters | |
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| Content Disposition Values and Parameters | |
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| Content Security Policy Directives | |
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| Content-Centric Networking (CCNx) | |
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| Context labels for Internet Messages | |
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| Context Transfer Protocol (CXTP) Parameters | |
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| Control And Provisioning of Wireless Access Points (CAPWAP) Parameters | |
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| ControLling mUltiple streams for tElepresence (CLUE) | |
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| Cryptographic Suites for IKEv1, IKEv2, and IPsec | |
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| Cryptographically Generated Addresses (CGA) Message Type Name Space | |
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| Data Channel Establishment Protocol (DCEP) Parameters | |
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| Data Link Switching Client Access Protocol (DCAP) Parameters | |
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| Data Structure for the Security Suitability of Cryptographic Algorithms (DSSC) | |
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| Datagram Congestion Control Protocol (DCCP) Parameters | |
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RFC 4340
0-1: IETF Review (IETF RFC publication). 4-247: IETF Review (IETF RFC publication). 248-254: Reserved. 255: IETF Review (IETF RFC publication). |
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RFC 4340
10-119: IETF Review (IETF RFC publication). 120-126: Reserved. 127: IETF Review (IETF RFC publication). 128-255: CCID-specific codes. |
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RFC 4340
3-30: IETF Review (IETF RFC publication). 45-119: IETF Review (IETF RFC publication). 120-126: Reserved. 127: IETF Review (IETF RFC publication). 128-255: CCID-specific codes. |
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RFC 4340
12-119: IETF Review (IETF RFC publication). 120-126: Reserved. 127: IETF Review (IETF RFC publication). 128-255: CCID-specific codes. |
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| Datagram Transport Layer Security (DTLS) Extension to Establish Keys for Secure Real-time Transport Protocol (SRTP) | |
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| Delivery Status Notification (DSN) Types | |
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| DetNet Associated Channel Header (d-ACH) Flags | |
| Device Identification | |
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| Differentiated Services Field Codepoints (DSCP) | |
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| Directory System Names | |
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| Distributed Denial-of-Service Open Threat Signaling (DOTS) Signal Channel | |
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RFC 9132
1-127: IETF Review. 128-255: IETF Review. 256-16383: IETF Review. 16384-32767: Specification Required. 32768-49151: IETF Review. 49152-65535: Private Use. Nik Teague Mohamed Boucadair Andrew Mortensen Tirumaleswar Reddy |
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| Distributed Node Consensus Protocol (DNCP) | |
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| DNS-Based Authentication of Named Entities (DANE) Parameters | |
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| Domain Name System (DNS) Parameters | |
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RFC 9432
property prefix ends in the label "ext": Private Use. all other property prefixes: Expert Review. Peter Thomassen Ondřej Surý Willem Toorop |
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RFC 6891
1-65000: Expert Review. 65001-65534: Local/Experimental Use. Ólafur Guðmundsson (primary) Frederico AC Neves (secondary) Ray Bellis (secondary) Roy Arends (secondary) |
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RFC 9250
provisional (greater than 0x3f): Expert Review. provisional registration Date field update: First Come First Served. permanent, 0x00-0x3f: Standards Action or IESG Approval. permanent, greater than 0x3f: Specification Required. Sara Dickinson Christian Huitema |
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RFC 8490
0x0004-0x003F: Standards Action. 0x0040-0xF7FF: Expert Review. 0xF800-0xFBFF: Experimental/Local Use. 0xFC00-0xFFFF: Standards Action. Ted Lemon Sara Dickinson John Dickinson |
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RFC 6895, RFC 1035, RFC 9108
0: RRTYPE zero is used as a special indicator for the SIG RR RFC 2931, RFC 4034 and in other circumstances and must never be allocated for ordinary use.. 1-127: Expert Review (see mailing list information in RFC 6895) or Standards Action. 128-255: Expert Review (see mailing list information in RFC 6895) or Standards Action. 256-61439: Expert Review (see mailing list information in RFC 6895) or Standards Action. 61440-65279: Reserved for future use (IETF Review required to define use). 65280-65534: Private Use. 65535: Reserved (Standards Action). Roy Arends Frederico AC Neves Ólafur Guðmundsson Ray Bellis |
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RFC 8976
1-239: Specification Required. 240-254: Private Use. Warren Kumari Duane Wessels Wes Hardaker |
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RFC 8976
1-239: Specification Required. 240-254: Private Use. Warren Kumari Duane Wessels Wes Hardaker |
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RFC 9660
0-245: Specification Required. 246-254: Private Use. 255: Reserved. Hugo Salgado Mauricio Vergara Ereche Duane Wessels |
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| Domain Name System Security (DNSSEC) Algorithm Numbers | |
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| Domain Name System Security (DNSSEC) NextSECure3 (NSEC3) Parameters | |
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| Domain-based Message Authentication, Reporting, and Conformance (DMARC) | |
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| DomainKeys Identified Mail (DKIM) Parameters | |
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| Drone Remote ID Protocol | |
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RFC 9575
0x01-0x9F: Expert Review. 0xA0-0xEF: First Come First Served. 0xF0-0xFF: Experimental Use. Adam Wiethuechter Mohamed Boucadair |
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RFC 9886
0-3: Reserved. 4-3999: IESG Approval. 4000-8191: Reserved. 8192-15359: First Come First Served. 15360-16383: Private Use. |
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| Dynamic Host Configuration Protocol (DHCP) and Bootstrap Protocol (BOOTP) Parameters | |
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| Dynamic Host Configuration Protocol for IPv6 (DHCPv6) | |
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| Dynamic Link Exchange Protocol (DLEP) Parameters | |
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RFC 8175
4-111: Specification Required. 112-127: Private Use. 133-239: Specification Required. 240-254: Private Use. Rick Taylor |
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| Dynamic Source Routing (DSR) Protocol Parameters | |
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| Dynamic Symmetric Key Provisioning Protocol (DSKPP) | |
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| EAP-pwd Parameters | |
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| Electronic Commerce Modeling Language (ECML) Parameters | |
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| Electronic Commerce Modeling Language Version 2 (ECMLv2) Parameters | |
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| Email Authentication Parameters | |
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| Emergency Call Additional Data | |
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| Emergency Call Metadata/Control Data | |
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| Enumservice Registrations | |
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| Ephemeral Diffie-Hellman Over COSE (EDHOC) | |
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RFC 9668
less than -65536: Private Use. -65536 to -25: Specification Required. -24 to 23: Standards Action with Expert Review. 24 to 65535: Specification Required. greater than 65535: Private Use. Francesca Palombini Marco Tiloca Göran Selander |
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RFC 9528
-65536 to -25: Specification Required. -24 to -21: Private Use. -20 to 23: Standards Action with Expert Review. 24 to 65535: Specification Required. John Mattson Göran Selander Mališa Vučinić |
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RFC 9528
-65536 to -25: Expert Review. -24 to 23: Standards Action. 24 to 65535: Expert Review. John Mattson Göran Selander Mališa Vučinić |
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RFC 9528
0-23: Standards Action. 24-32767: Expert Review. 32768-65535: Private Use. John Mattson Göran Selander Mališa Vučinić |
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RFC 9528
0-23: Standards Action with Expert Review. 24-65535: Specification Required. John Mattson Göran Selander Mališa Vučinić |
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RFC 9528
-65536 to -25: Specification Required. -24 to 23: Standards Action with Expert Review. 24 to 65535: Specification Required. John Mattson Göran Selander Mališa Vučinić |
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| ESP AGGFRAG_PAYLOAD | |
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| Ethernet VPN (EVPN) | |
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| Extended Master Session Key (EMSK) Parameters | |
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| Extensible Authentication Protocol (EAP) | |
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RFC 9140
6001-6999: Private and Experimental Use. All other values: Specification Required. Tuomas Aura Mohit Sethi |
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RFC 4793
0x0003-0x7fff: Specification Required and IESG Approval. 0x8000-0xffff: Vendor-specific proprietary algorithms. Joseph Salowey |
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RFC 4793
0x0006-0x7fff: Specification Required and IESG Approval. 0x8000-0xffff: Proprietary vendor-specific algorithms. Joseph Salowey |
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RFC 4793
0x0002-0x7fff: Specification Required and IESG Approval. 0x8000-0xffff: Vendor-specific proprietary algorithms. Joseph Salowey |
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RFC 3748
1-191: Specification Required. 192-253: Standards Action. 254: Expanded Type. 255: Experimental. 256-4294967295: Specification Required. Joseph Salowey |
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| Extensible Authentication Protocol (EAP) Channel-Binding Parameters | |
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| Extensible Authentication Protocol (EAP) Encrypted Key Exchange (EKE) Registry | |
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| Extensible Binary Meta Language (EBML) | |
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RFC 8794
0x80-0xFE: RFC Required. 0x407F-0x7FFE: Specification Required. 0x203FFF-0x3FFFFE: First Come First Served. 0x101FFFFF-0x1FFFFFFE: Specification Required or First Come First Served. Dave Rice (primary) Steve Lhomme (backup) Moritz Bunkus (backup) |
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| Extensible Markup Language (XML) Configuration Access Protocol (XCAP) Parameters | |
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| Extensible Provisioning Protocol (EPP) Extensions | |
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RFC 7451
Specification Required Gavin Brown (primary) Alexander Mayrhofer (secondary) Ning Kong (secondary) Roger D Carney (secondary) Jim Galvin (secondary) James Gould (secondary) Scott Hollenbeck (secondary) |
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| Extensible Provisioning Protocol (EPP) Organization Role Values | |
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| Extensible Provisioning Protocol (EPP) Repository Identifiers | |
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| FCAST Parameters | |
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| Federated File System (FedFS) Parameters | |
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| Fibre Channel Port Types Registry | |
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RFC 4044
1-9999: Specification Required. 10000-99999: Private Use. 100000 and higher: Reserved. Claudio DeSanti |
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| Flow Spec Component Types | |
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| FLUTE - File Delivery over Unidirectional Transport (FLUTE) Parameters | |
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| FOOBAR Address Family Numbers | |
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| Forwarding and Control Element Separation (ForCES) | |
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RFC 5810
0x00000000-0x000000FF: IETF Review. 0x00000100-0x0000FFFF: Specification Required. Jamal Hadi Salim Joel Halpern |
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RFC 5810
0x00000000-0x0000FFFF: IETF Review. 0x00010000-0x7FFFFFFF: Specification Required. Jamal Hadi Salim Joel Halpern |
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RFC 5810
0x0000-0x00FF: IETF Review. 0x0100-0x7FFF: Specification Required. Jamal Hadi Salim Joel Halpern |
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| Free Lossless Audio Codec (FLAC) | |
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| FTP parameters | |
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RFC 5797
registration marked "mandatory" ('m' in the "conf" column): Standards Action. all other registrations: Specification Required. John Klensin |
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| General Internet Signalling Transport (GIST) Parameters | |
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| Generalized Multi-Protocol Label Switching (GMPLS) Signaling Parameters | |
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| GeneRic Autonomic Signaling Protocol (GRASP) Parameters | |
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| Generic Routing Encapsulation (GRE) Parameters | |
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| Generic Security Service Application Program Interface (GSSAPI)/Kerberos/Simple Authentication and Security Layer (SASL) Service Names | |
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| Generic Security Service Application Program Interface Parameters | |
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| Geolocation Policy | |
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| Geopriv HTTP Enabled Location Delivery (HELD) Parameters | |
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| Geopriv Identifiers | |
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| Geopriv Location Object Registries | |
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| Geopriv Location Type Registries | |
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| Global Navigation Satellite System (GNSS) | |
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| Global Switch Management Protocol version 3 (GSMPv3) Adaptation Type Name Space | |
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| Global Switch Management Protocol version 3 (GSMPv3) Event Flag Name Space | |
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| Global Switch Management Protocol version 3 (GSMPv3) Failure Response Message Name Space | |
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RFC 3292
0-59: IETF Review. 60-79: Reserved for Vendor Private Extensions. 80-127: IETF Review. 128-159: Reserved for Vendor Private Extensions. 160-255: IETF Review. |
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| Global Switch Management Protocol version 3 (GSMPv3) Label Type Name Space | |
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RFC 3292
0x000-0xAFF: IETF Review. 0xB00-0xEFF: RFC Required. 0xF00-0xFFF: Reserved for vendor private use. |
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| Global Switch Management Protocol version 3 (GSMPv3) Message Type Name Space | |
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RFC 3292
0-99: IETF Review. 100-199: RFC Required. 200-249: Intended for Abstract and Resource Model Extension Messages. 250-255: Reserved for vendor private use. |
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| Global Switch Management Protocol version 3 (GSMPv3) Model Type Name Space | |
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| Global Switch Management Protocol version 3 (GSMPv3) Port Type Name Space | |
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| Global Switch Management Protocol version 3 (GSMPv3) Result Type Name Space | |
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| Global Switch Management Protocol version 3 (GSMPv3) Service ID Name Space | |
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| Global Switch Management Protocol version 3 (GSMPv3) Traffic Control Name Space | |
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| Global Switched Telephone Network (GSTN) Address Element Extensions in Email Services | |
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| GMPLS Routing Parameters for WSON | |
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| Grant Negotiation and Authorization Protocol (GNAP) | |
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| Group Domain of Interpretation (GDOI) Payloads | |
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| Group Secure Association Group Management Protocol (GSAKMP) Parameters | |
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| Hash Algorithms for HTTP Digest Fields | |
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| Hash Function Textual Names | |
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| Hash-Based Signatures | |
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RFC 8554
0x00000005-0xDDDDDDDC: Specification Required. 0xDDDDDDDD-0xFFFFFFFF: Private Use. David McGrew Scott Fluhrer |
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RFC 8554
0x00000001-0xDDDDDDDC: Specification Required. 0xDDDDDDDD-0xFFFFFFFF: Private Use. David McGrew Scott Fluhrer |
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| Host Identity Protocol (HIP) Parameters | |
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RFC 7401
1-50: IETF Review. 51-8191: Specification Required. 8192-16383: Reserved for Private Use. 16384-40959: Specification Required. 40960-65535: Reserved for Private Use. Robert Moskowitz Jeff Ahrenholz |
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RFC 7401
0-1023: IETF Review. 1024-32767: Specification Required. 32768-49151: Reserved for Private Use. 49152-61439: Specification Required. 61440-65535: IETF Review. Robert Moskowitz Jeff Ahrenholz |
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| HTTP Message Signature | |
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| HTTP Origin-Bound Authentication (HOBA) Parameters | |
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| Hybrid Public Key Encryption (HPKE) | |
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| Hypertext Transfer Protocol (HTTP) Alt-Svc Parameter Registry | |
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| Hypertext Transfer Protocol (HTTP) Authentication Control Parameters | |
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| Hypertext Transfer Protocol (HTTP) Authentication Scheme Registry | |
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| Hypertext Transfer Protocol (HTTP) Cache Directive Registry | |
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| Hypertext Transfer Protocol (HTTP) Cache-Status | |
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| Hypertext Transfer Protocol (HTTP) Cookie Attributes | |
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| Hypertext Transfer Protocol (HTTP) Digest Algorithm Values | |
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| Hypertext Transfer Protocol (HTTP) Field Name Registry | |
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| Hypertext Transfer Protocol (HTTP) Method Registry | |
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| Hypertext Transfer Protocol (HTTP) Parameters | |
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| Hypertext Transfer Protocol (HTTP) Priority | |
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RFC 9218
Key length of one: Specification Required. Key length greater than one: Expert Review. Lucas Pardue Kazuho Oku |
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| Hypertext Transfer Protocol (HTTP) Problem Types | |
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| Hypertext Transfer Protocol (HTTP) Proxy-Status | |
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| Hypertext Transfer Protocol (HTTP) Status Code Registry | |
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| Hypertext Transfer Protocol (HTTP) Upgrade Token Registry | |
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| Hypertext Transfer Protocol (HTTP) Warn Codes | |
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| Hypertext Transfer Protocol version 2 (HTTP/2) Parameters | |
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| Hypertext Transfer Protocol version 3 (HTTP/3) | |
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RFC 9114
provisional: Expert Review. provisional registration date field update: First Come First Served. permanent, 0x00-0x3f: Standards Action or IESG Approval. permanent, greater than 0x3f: Specification Required. values 0x1f * N + 0x21 (for non-negative integer values of N): Reserved. first unassigned codepoint: Standards Action. Mike Bishop Alan Frindell |
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RFC 9114
provisional: Expert Review. provisional registration date field update: First Come First Served. permanent, 0x00-0x3f: Standards Action or IESG Approval. permanent, greater than 0x3f: Specification Required. values 0x1f * N + 0x21 (for non-negative integer values of N): Reserved. first unassigned codepoint: Standards Action. Mike Bishop Alan Frindell |
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RFC 9114
provisional: Expert Review. provisional registration date field update: First Come First Served. permanent, 0x00-0x3f: Standards Action or IESG Approval. permanent, greater than 0x3f: Specification Required. values 0x1f * N + 0x21 (for non-negative integer values of N): Reserved. first unassigned codepoint: Standards Action. Mike Bishop Alan Frindell |
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RFC 9114
provisional: Expert Review. provisional registration date field update: First Come First Served. permanent, 0x00-0x3f: Standards Action or IESG Approval. permanent, greater than 0x3f: Specification Required. values 0x1f * N + 0x21 (for non-negative integer values of N): Reserved. first unassigned codepoint: Standards Action. Mike Bishop Alan Frindell |
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| IANA OUI Ethernet Numbers | |
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draft-ietf-ntp-over-ptp-08
0-0xFFFF: IETF Review. 0x10000-0x7FFFFF: Specification Required. 0x800000-0xFFFFFE: Experimental and Private Use. |
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| IANA-Maintained MIBs | |
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RFC 7367
IANAsmfOpModeIdTC: First Come First Served. IANAsmfRssaIdTC: 1-127, Standards Action; 128-239, Reserved for Private or Local Use; 240-255, Experimental RFC. |
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RFC 2561
Working Group Review (see DESCRIPTION clause associated with the MODULE-IDENTITY statement) |
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| iCalendar Element Registries | |
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| IDNA Rules and Derived Property Values | |
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| IEEE 802 Numbers | |
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Not assigned by IANA. Per RFC 9542, updates to this registry are coordinated with the expert. Donald Eastlake (primary) Juan Carlos Zuniga (secondary) |
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Not assigned by IANA. Per RFC 9542, updates to this registry are coordinated with the expert. Donald Eastlake (primary) Juan Carlos Zuniga (secondary) |
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| IEEE Std 802.15.4 IETF IE Subtype IDs | |
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| IETF XML Registry | |
| In Situ OAM (IOAM) | |
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| In Situ OAM (IOAM) Capabilities | |
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| Incident Object Description Exchange Format (IODEF) | |
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| Incident Object Description Exchange Format v2 (IODEF) | |
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| Instance Manipulation Values | |
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| Instant Message Disposition Notification (IMDN) Headers | |
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| Instant Messaging SRV Protocol Label Registry | |
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| Integrated Services Parameters | |
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| Inter-Asterisk eXchange (IAX) Parameters | |
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| Interactive Connectivity Establishment (ICE) | |
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| Interface Parameters | |
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| Interior Gateway Protocol (IGP) Parameters | |
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| Internet - Xerox Network System (XNS) Protocol Mappings | |
| Internet Control Message Protocol (ICMP) Parameters | |
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| Internet Control Message Protocol version 6 (ICMPv6) Parameters | |
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| Internet Date/Time Format | |
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| Internet Group Management Protocol (IGMP) Type Numbers | |
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| Internet Key Exchange (IKE) Attributes | |
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| Internet Key Exchange Version 2 (IKEv2) Parameters | |
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| Internet Message Access Protocol (IMAP) Capabilities | |
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RFC 5257
Under vendor namespace: First Come First Served. Not under vendor namespace: Standards Track or IESG-Approved Experimental RFC. |
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| Internet Message Store Events | |
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RFC 5423
name starts wth "vnd."; intended for private use: First Come First Served. name doesn't start with "vnd."; intended for interoperable use: IETF Review. |
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RFC 5423
name starts wth "vnd."; intended for private use: First Come First Served. name doesn't start with "vnd."; intended for interoperable use: IETF Review. |
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| Internet Open Trading Protocol (IOTP) Codes | |
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| Internet Printing Protocol (IPP) Registrations | |
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| Internet Protocol version 4 (IPv4) Address Space | |
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Global Policy for Post Exhaustion IPv4 Allocation Mechanisms by the IANA (Ratified 6 May 2012) |
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Global Policy for Post Exhaustion IPv4 Allocation Mechanisms by the IANA (Ratified 6 May 2012) |
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RFC 7249
Allocations to RIRs are made in line with the Global Policy published at http://www.icann.org/en/resources/policy/global-addressing. All other assignments require IETF Review. |
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| Internet Protocol Version 4 (IPv4) Parameters | |
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Not defined |
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Not defined |
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Registrations no longer accepted |
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Registrations no longer accepted |
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| Internet Protocol version 6 (IPv6) Global Unicast Allocations | |
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RFC 7249
Allocations to RIRs are made in line with the Global Policy published at http://www.icann.org/en/resources/policy/global-addressing. All other assignments require IETF Review. |
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| Internet Protocol Version 6 (IPv6) Parameters | |
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| Internet Small Computer System Interface (iSCSI) Parameters | |
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RFC 7143
Standards Action to define the semantics of the opcode; Expert Review to select the specific opcode(s) |
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| Internet Storage Name Service (iSNS) Parameters | |
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| Intrusion Detection Exchange Protocol (IDXP) Options | |
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| Intrusion Detection Message Exchange Format (IDMEF) Parameters | |
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| IP Flow Information Export (IPFIX) Entities | |
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| IP Multicast Traceroute Facility (Mtrace) | |
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| IP Version Numbers | |
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| IPS Protocol# (Protocol Number) Field | |
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| IPSECKEY Resource Record Parameters | |
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| IPv4 Multicast Address Space | |
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| IPv6 Address Space | |
| IPv6 Anycast Address Space | |
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| IPv6 Low Power Personal Area Network Parameters | |
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| IPv6 Multicast Address Space | |
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RFC 3307, draft-ietf-pim-updt-ipv6-dyn-mcast-addr-grp-id-13
0x90000000-0xEFFFFFFF: Standards Action. 0xFD000000-0xFDFFFFFF: Private Use. 0xFE000000-0xFEFFFFFF: Experimental Use. Stig Venaas |
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RFC 3307
Addresses in FF3X:0::/32 but not listed below are reserved for future SSM address use, but are currently invalid. FF3X:0:0:0:0:0:0:0-FF3X:0:FFFF:FFFF:FFFF:FFFF:FFFF:FFFF (FF3X:0::/32) FF3X:0:0:0:0:0:4000:0-FF3X:0:0:0:0:0:7FFF:FFFF - Expert Review; see registry at https://www.iana.org/assignments/perm-mcast-groupids FF3X:0:0:0:0:0:8000:0-FF3X:0:0:0:0:0:FFFF:FFFF - Uses dynamic assignment according to the protocols listed in the https://www.iana.org/assignments/ipv6-multicast-addresses/ipv6-multicast-addresses.xhtml#dynamic-multicast-group-idsDynamic Multicast Group IDs registry Stig Venaas |
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| IPv6 Over the TSCH Mode of IEEE 802.15.4 (6TiSCH) | |
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RFC 8480
0-127: IETF Review or IESG Approval. 128-255: Expert Review. Xavi Vilajosana Guillen Thomas Watteyne |
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RFC 9031
Integer values less than -65536: Private Use. Integer values from -65536 to -257: Specification Required. Integer values from -256 to 255: Standards Action. Integer values from 256 to 65535: Specification Required. Integer values greater than 65535: Expert Review. Mališa Vučinić Michael Richardson |
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RFC 9031
Integer values less than -65536: Private Use. Integer values from -65536 to -257: Specification Required. Integer values from -256 to 255: Standards Action. Integer values from 256 to 65535: Specification Required. Integer values greater than 65535: Expert Review. Mališa Vučinić Michael Richardson |
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RFC 9031
Integer values less than -65536: Private Use. Integer values from -65536 to -257: Specification Required. Integer values from -256 to 255: Standards Action. Integer values from 256 to 65535: Specification Required. Integer values greater than 65535: Expert Review. Mališa Vučinić Michael Richardson |
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| IPv6 Router Alert Option Values | |
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| IPv6 Top Level Aggregation Identifier Assignments | |
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| IS-IS | |
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| Java Message Service (JMS) URI Scheme Variants | |
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| JSCalendar | |
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| JSContact | |
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RFC 9553
Major version change required: Standards Action. All other assignments: Specification Required. Michael Douglass Mario Loffredo Robert Stepanek |
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draft-ietf-calext-jscontact-profiles-14
Reference updates: Expert Review. New assignments: Specification Required. |
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RFC 9553
Major version change required: Standards Action. All other assignments: Specification Required. Michael Douglass Mario Loffredo Robert Stepanek |
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RFC 9553
Major version change required: Standards Action. All other assignments: Specification Required. Michael Douglass Mario Loffredo Robert Stepanek |
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RFC 9553
Major version change required: Standards Action. All other assignments: Specification Required. Michael Douglass Mario Loffredo Robert Stepanek |
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| JSON Meta Application Protocol (JMAP) | |
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RFC 8620
intended use field is “common" or “placeholder”: Specification Required. all other values: Expert Review. Neil Jenkins Chris Newman Arnt Gulbrandsen Joris Baum |
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| JSON Object Signing and Encryption (JOSE) | |
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| JSON Web Token (JWT) | |
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| JSONPath | |
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| Kerberized Internet Negotiation of Keys (KINK) Parameters | |
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RFC 4430
0-8191: Standards Action or non standards-track RFCs with Expert Review. 8192-16383: Private Use. 16384-4294967295: Reserved. Stewart Bryant Danny McPherson |
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RFC 4430
1-127: Standards Action or non standards-track RFCs with Expert Review. 128-255: Private Use. Shoichi Sakane Ken'ichi Kamada |
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RFC 4430
0-127: Standards Action or non standards-track RFCs with Expert Review. 128-255: Private Use. Shoichi Sakane Ken'ichi Kamada |
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| Kerberos Parameters | |
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RFC 3961
Standards Action for standards-track RFCs; non-standards-track RFCs must be reviewed by an expert. Ken Raeburn |
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RFC 3961
Standards Action for standards-track RFCs; non-standards-track RFCs must be reviewed by an expert. Ken Raeburn |
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| Kerberos V GSS-API Mechanism Parameters | |
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| Keying and Authentication for Routing Protocols (KARP) Parameters | |
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| KeyNote Parameters | |
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| KeyTable | |
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| Label Distribution Protocol (LDP) Parameters | |
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RFC 5036
0x00000000-0xefffffff: First Come First Served. 0xf0000000-0xffffffff: Experiment Ids - Reserved for Private Use. |
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RFC 5036
0x0001-0x00FF: IETF Review. 0x0100-0x01FF: IETF Review. 0x0200-0x02FF: IETF Review. 0x0300-0x03FF: IETF Review. 0x0400-0x04FF: IETF Review. 0x0500-0x05FF: IETF Review. 0x0600-0x3DFF: IETF Review. 0x3E00-0x3EFF: LDP Vendor-Private Extensions. 0x3F00-0x3FFF: LDP Experimental Extensions. |
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RFC 5036
0x00000000-0x1FFFFFFF: IETF Review. 0x20000000-0x3EFFFFFF: First Come First Served. 0x3F000000-0x3FFFFFFF: Private Use. |
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RFC 5036
0x0001-0x07FF: IETF Review. 0x0800-0x08FF (CR-LDP): IETF Review. 0x0900-0x3DFF: IETF Review. 0x3E00-0x3EFF: LDP Vendor-Private Extensions. 0x3F00-0x3FFF: LDP Experimental Extensions. |
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| Label Generation Ruleset (LGR) Dispositions | |
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| Language Tags | |
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| Layer Two Tunneling Protocol "L2TP" | |
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RFC 3931
0-32767: Expert Review. 32768-65535: First Come First Served. Carlos Pignataro (primary) Ignacio Goyret (secondary) |
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| Layered Coding Transport (LCT) Header Extension Types | |
|
RFC 5651
0-63: IETF Review. 64-127: Specification Required. 128-191: IETF Review. 192-255: Specification Required. Vincent Roca |
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| Level of Assurance (LoA) Profiles | |
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| Licklider Transmission Protocol (LTP) Parameters | |
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RFC 7116
1-16383: Expert Review. 268435456-4398046511103: First Come First Served for requests of up to 16384 values. Larger requests require Expert Review.. |
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| Lightweight Directory Access Protocol (LDAP) - pcimSchema Descriptors | |
| Lightweight Directory Access Protocol (LDAP) Parameters | |
|
RFC 4520
x- Private Use (can not be registered) e- Reserved for Experiments, First Come First Served All others: Standards Action or Expert Review with Specification Rolf Sonneveld Andrew Findlay |
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RFC 4520
0-1023 Standards Action (can not start with e- or x-) 1024-4095 Expert Review with Specification Required (can not start with e- or x-) 4096-16383 First Come First Served (Shall start with e-) 16384 and higher Private Use (Shall start with x-) Rolf Sonneveld Andrew Findlay |
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RFC 4520
x- Private Use e- Reserved for Experiments, First Come First Served All others, Standards Action or Expert Review with Specification Required Rolf Sonneveld Andrew Findlay |
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RFC 4520
0-1023 Standards Action (can not start with e- or x-) 1024-4095 Expert Review with Specification Required (can not start with e- or x-) 4096-16383 First Come First Served (Shall start with e-) 16384 and higher Private Use (Shall start with x-) Rolf Sonneveld Andrew Findlay |
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RFC 4520
0-1023 Standards Action (can not start with e- or x-) 1024-4095 Expert Review with Specification Required (can not start with e- or x-) 4096-16383 First Come First Served (Shall start with e-) 16384 and higher Private Use (Shall start with x-) Rolf Sonneveld Andrew Findlay |
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RFC 4520
x- Private Use (can not be registered) e- Reserved for Experiments, First Come First Served All others: Expert Review Rolf Sonneveld Andrew Findlay |
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RFC 4520
0-1023 Standards Action (can not start with e- or x-) 1024-4095 Expert Review with Specification Required (can not start with e- or x-) 4096-16383 First Come First Served (Shall start with e-) 16384 and higher Private Use (Shall start with x-) Rolf Sonneveld Andrew Findlay |
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| Link Management Protocol (LMP) Parameters | |
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| Link Relations | |
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| Link State Routing TE Capabilities | |
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| Locally-Served DNS Zones | |
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| Location-to-Service Translation (LoST) Location Profiles | |
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| Locator/ID Separation Protocol (LISP) Parameters | |
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| Machine Names | |
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Not defined |
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| "Magic Numbers" for ISAKMP Protocol | |
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| Mail Parameters | |
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RFC 8494
Specification Required Alexey Melnikov (primary) RFC Independent Submissions Editor (secondary) |
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| Manufacturer Usage Description (MUD) | |
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| Matroska | |
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RFC 9559
0x80-0xFE: RFC Required. 0x407F-0x7FFE: Specification Required. 0x203FFF-0x3FFFFE: First Come First Served. 0x101FFFFF-0x1FFFFFFE: First Come First Served. Dave Rice Steve Lhomme |
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draft-ietf-cellar-tags-25
Tag Names for UTF-8 data: First Come First Served. Tag Names for binary data: Specification Required. Tag Names for nested tags: Specification Required. |
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| Maximally Redundant Tree (MRT) Parameters | |
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| Media Control Channel Framework Parameters | |
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| Media Feature Tags - iso.org.dod.internet.features (1.3.6.1.8) | |
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| Media Gateway Control Protocol (MGCP) | |
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| Media Independent Handover (MIH) | |
| Media Resource Control Protocol Version 2 (MRCPv2) Parameters | |
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| Megaco/H.248 Packages | |
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| Message Disposition Notification (MDN) Parameters | |
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| Message Headers | |
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RFC 3864, draft-ietf-emailcore-rfc5322bis-12
Expert Review Mark Baker (primary) Murray Kucherawy (backup) |
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RFC 3864, draft-ietf-emailcore-rfc5322bis-12
Expert Review Mark Baker (primary) Murray Kucherawy (backup) |
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| Message Session Relay Protocol (MSRP) Parameters | |
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| Message Tracking Query Protocol (MTQP) Options Registry | |
|
RFC 3887
Options whose names do not begin with "vnd.": Standards Action or IESG-approved experimental RFC. Options with "vnd.": First Come First Served. |
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| Messaging Abuse Reporting Format (MARF) Parameters | |
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| Messaging Layer Security (MLS) | |
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| Milnet Parameters | |
|
Registry closed |
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Registry closed |
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Registry closed |
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| Mobile Ad hoc NETwork (MANET) Parameters | |
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RFC 6130
0-127: Reserved. 128-223: Expert Review. 224-255: Reserved. Justin Dean Christoper Dearlove (backup) |
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RFC 6130
0-127: Reserved. 128-223: Expert Review. 224-255: Reserved. Justin Dean Christoper Dearlove (backup) |
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RFC 7181
0-127: Reserved. 128-223: Expert Review. 224-255: Reserved. Justin Dean Christoper Dearlove (backup) |
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RFC 7181
0-127: Reserved. 128-223: Expert Review. 224-255: Reserved. Justin Dean Christoper Dearlove (backup) |
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| Mobile IPv4 Numbers | |
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RFC 6098
0: Expert Review. 1-63: Expert Review. 64-69: Expert Review. 70-127: Expert Review. 128-133: Expert Review. 134-191: Expert Review. 192-197: Expert Review. 198-255: Expert Review. |
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| Mobile IPv6 | |
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| Multi-threaded Routing Toolkit (MRT) | |
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RFC 6396
New Subtype Code definitions must reference an existing Type Code to which the Subtype belongs. Subtype assignments follow the assignment rules for the Type Codes to which they belong. |
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RFC 6396
65-511: IETF Review. 512-2047: Specification Required. 2048-64511: First Come First Served. |
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| Multicast Acquisition | |
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| Multicast Address Dynamic Client Allocation Protocol (MADCAP) Parameters | |
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| Multicast Address-Set Claim (MASC) Parameters | |
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| Multicast Ping Protocol Parameters | |
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| Multicast Source Discovery Protocol (MSDP) TLV Values Registry | |
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| Multimedia Internet KEYing (MIKEY) Payload Name Spaces | |
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| Multiplexed Application Substrate over QUIC Encryption (MASQUE) | |
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RFC 9297
provisional: Expert Review. Date field update for provisional registrations: First Come First Served. permanent, 0x00-0x3f: Standards Action or IESG Approval. permanent, greater than 0x3f: Specification Required. first unassigned codepoint: Standards Action. values 0x29 * N + 0x17 (for integer values of N): Reserved. Lucas Pardue David Schinazi |
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| Multiprotocol Label Switching Architecture (MPLS) | |
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RFC 9779
1-175: IETF Review. 176-239: First Come First Served. 240-251: Experimental Use. 252-254: Private Use. |
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| Multipurpose Internet Mail Extensions (MIME) and Media Types | |
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| Named Information | |
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| Namespaces for IP over IEEE 1394 | |
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| Negative-ACKnowledgment (NACK) Oriented Reliable Multicast (NORM) Parameters | |
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| Netnews Parameters | |
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| Network Configuration Protocol (NETCONF) Capability URNs | |
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| Network File System version 4 (NFSv4) | |
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RFC 8881
ietf.org domain: Standards Action with Expert Review. non-ietf.org. domain: First Come First Served. |
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| Network Layer Protocol Identifiers (NLPIDs) of Interest | |
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| Network News Transfer Protocol (NNTP) Parameters | |
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RFC 3977
Labels beginning with X are reserved for private use. All others: Standards Track RFC or an IESG-approved experimental protocol. |
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| Network Service Header (NSH) Parameters | |
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RFC 8300
0x0000-0x01FF: IETF Review. 0x0200-0xFFF5: Expert Review. Carlos Pignataro Joel Halpern Jim Guichard |
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| Network Time Protocol (NTP) Parameters | |
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| Network Time Security (NTS) | |
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RFC 8915
0-1023: IETF Review. 1024-32767: Specification Required. 32768-65535: Private or Experimental Use. Miroslav Lichvar Daniel Franke |
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RFC 8915
0-1023: IETF Review. 1024-16383: Specification Required. 16384-32767: Private or Experimental Use. Miroslav Lichvar Daniel Franke |
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RFC 8915
0-1023: IETF Review. 1024-32767: Specification Required. 32768-65535: Private or Experimental Use. Miroslav Lichvar Daniel Franke |
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RFC 8915
0-1023: IETF Review. 1024-32767: Specification Required. 32768-65535: Private or Experimental Use. Miroslav Lichvar Daniel Franke |
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| Network Virtualization Overlay (NVO3) | |
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RFC 8926
0x0000-0x00FF: IETF Review. 0x0100-0xFEFF: First Come First Served. 0xFF00-0xFFFF: Experimental Use. |
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| Next Hop Resolution Protocol (NHRP) Types | |
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| Novell Service Advisor Protocol (SAP) Numbers - Novell Object Types | |
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IANA does not assign |
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| NSIS Signaling Layer Protocol (NSLP) Parameters | |
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| OAuth Parameters | |
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| One Time Password (OTP) Parameters | |
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| One-Way Active Measurement Protocol (OWAMP) Parameters | |
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| Open Pluggable Edge Services (OPES) | |
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| Open Shortest Path First (OSPF) | |
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| Open Shortest Path First (OSPF) Authentication Codes | |
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| Open Shortest Path First (OSPF) Link Local Signalling (LLS) - Type/Length/Value Identifiers (TLV) | |
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| Open Shortest Path First (OSPF) Multi-Topology Routing | |
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| Open Shortest Path First (OSPF) Opaque Link-State Advertisements (LSA) Option Types | |
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| Open Shortest Path First (OSPF) Parameters | |
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| Open Shortest Path First (OSPF) Signature Algorithms | |
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| Open Shortest Path First (OSPF) Traffic Engineering TLVs | |
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| Open Shortest Path First v2 (OSPFv2) Parameters | |
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RFC 4940
1-255: Standards Action. 256-65519: Reserved. 65520-65527: Experimentation. 65528-65535: Vendor Private Use. |
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| Open Shortest Path First v3 (OSPFv3) Authentication Trailer Options | |
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| Open Shortest Path First v3 (OSPFv3) Parameters | |
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RFC 7770
0-255: IETF Review. 256-8175: Reserved. 8176-8183: Experimentation. 8184-8190: Vendor Private Use. 8191: Reserved. |
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| Open Systems Interconnection (OSI) Network Service Access Point Addresses (NSAPA) Internet Code Point Registry | |
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| OpenPGP | |
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| Operating System Names | |
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| Optimized Link State Routing (OLSR) Protocol Message Types | |
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| Opus Channel Mapping Families | |
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| OSPF Database Description (DD) Packet Flags | |
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| Packet CAPture (PCAP) | |
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| Packet Sampling (PSAMP) Parameters | |
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| PAL Package Types | |
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| Path Computation Element Protocol (PCEP) Numbers | |
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RFC 5541
1-1023: IETF Review. 1024-32767: First Come First Served. 32768-65535: Reserved for Private Use. |
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RFC 9168
0-255: Reserved. 256-64506: Specification Required. 64507-65531: First Come First Served. 65532-65535: Experimental Use. |
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| Peer-to-Peer Streaming Peer Protocol (PPSPP) | |
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| Peer-to-Peer Streaming Tracker Protocol (PPSTP) | |
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| Per Hop Behavior Identification Codes | |
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| Performance Metrics | |
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| Permanent IPv6 Multicast Group Identifiers | |
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| Point-to-Point (PPP) Protocol Field Assignments | |
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| Point-to-Point Over Ethernet (PPPoE) Parameters | |
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| Port Control Protocol (PCP) Parameters | |
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RFC 6887
0-63, 127-191, 255: Standards Action. 64-95, 192-223: Specification Required. Dan Wing Stuart Cheshire |
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| Portable Symmetric Key Container (PSKC) | |
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| Post Office Protocol version 3 (POP3) Extension Mechanism | |
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| Post-Stack First Nibble | |
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| Posture Attribute (PA) Protocol Compatible with Trusted Network Connect (TNC) Parameters | |
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| Posture Broker (PB) Protocol Compatible with Trusted Network Connect (TNC) Parameters | |
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| Power State Sets | |
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| PRECIS Derived Property Value | |
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| Preparation and Comparison of Internationalized Strings (PRECIS) Parameters | |
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RFC 8264
Expert Review Peter Saint-Andre (primary) Pete Resnick (secondary) Andrew Sullivan (backup) |
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| Presence SRV Protocol Label Registry | |
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| Printer MIB Interpreters Language Families - OBSOLETE | |
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| Privacy Enhanced RTP Conferencing (PERC) | |
| Privacy Pass | |
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| Probabilistic Routing Protocol using History of Encounters and Transitivity (PRoPHET) | |
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| Profile URIs | |
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| Pronet 80 Type Numbers | |
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IANA does not assign |
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| Protocol for Carrying Authentication for Network Access (PANA) Parameters | |
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| Protocol Independent Multicast (PIM) Parameters | |
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| Protocol Numbers | |
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| Protocol to Access White-Space (PAWS) | |
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| Provisioning Domains (PvDs) | |
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| Proxy Certificate Policy Languages | |
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| Pseudowire Name Spaces (PWE3) | |
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RFC 4446
2-64: Expert Review. 65-127: IETF Review. 128-254: First Come First Served. 255: IETF Review. Stewart Bryant Andrew Malis Matthew Bocci |
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RFC 4446
2-64: Expert Review. 65-127: IETF Review. 128-254: First Come First Served. 255: IETF Review. Stewart Bryant Andrew Malis Matthew Bocci |
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RFC 7275
0x0000: IETF Review. 0x003B-0x1FFF: Expert Review. 0x2000-0x2FFF: IETF Review. 0x3000-0x3FFE: First Come First Served. 0x3FFF: IETF Review. Stewart Bryant Matthew Bocci |
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RFC 4446
31-1024: Expert Review. 1025-4096: IETF Review. 4097-32766: First Come First Served. 32767: IETF Review. Stewart Bryant Andrew Malis Matthew Bocci |
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RFC 4446
2-64: Expert Review. 65-127: IETF Review. 128-254: First Come First Served. 255: IETF Review. Stewart Bryant Andrew Malis Matthew Bocci |
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RFC 6073
0: IETF Review. 1-64: Expert Review. 65-127: IETF Review. 128-254: First Come First Served. 255: IETF Review. Primary: Stewart Bryant; secondary: Matthew Bocci |
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RFC 8237
0x00: IETF Review. 0x04-0x40: Expert Review. 0x41-0x7F: IETF Review. 0x80-0xFE: Expert Review. 0xFF: IETF Review. Stewart Bryant Andrew Malis |
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RFC 8237
0x00: IETF Review. 0x03-0x40: Expert Review. 0x41-0x7F: IETF Review. 0x80-0xFE: Expert Review. 0xFF: IETF Review. Stewart Bryant Andrew Malis |
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RFC 8237
0x00000000: IETF Review. 0x00000008-0x00010000: Expert Review. 0x00010001-0x08000000: IETF Review. 0x08000001-0xFFFFFFFE: Expert Review. 0xFFFFFFFF: IETF Review. Stewart Bryant Andrew Malis |
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| PT-EAP: Posture Transport (PT) Protocol For EAP Tunnel Methods | |
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| Public Data Network Numbers | |
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| Public Key Infrastructure using X.509 (PKIX) Parameters | |
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| Public Notary Transparency | |
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RFC 9162
0x0000-0xDFFF: Specification Required. 0xE000-0xEFFF: Experimental Use. 0xF000-0xFFFF: Private Use. |
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RFC 9162
0x0000-0x0807: Specification Required. 0x0808-0xFDFF: Expert Review. 0xFE00-0xFEFF: Experimental Use. 0xFF00-0xFFFF: Private Use. |
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RFC 9162
0x0100-0xDFFF: Specification Required. 0xE000-0xEFFF: Experimental Use. 0xF000-0xFFFF: Private Use. |
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| QoS NSIS Signal Layering Protocol (NSLP) QSPEC Parameters | |
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| QUIC | |
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RFC 9000
provisional: Expert Review. provisional registration Date field update: First Come First Served. permanent, 0x00-0x3f: Standards Action or IESG Approval. permanent, greater than 0x3f: Specification Required. first unassigned codepoint: Standards Action. Jana Iyengar Ian Swett Martin Thomson |
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RFC 9000
provisional: Expert Review. provisional registration Date field update: First Come First Served. permanent, 0x00-0x3f: Standards Action or IESG Approval. permanent, greater than 0x3f: Specification Required. first unassigned codepoint: Standards Action. Jana Iyengar Ian Swett Martin Thomson |
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RFC 9000
provisional: Expert Review. provisional registration Date field update: First Come First Served. permanent, 0x00-0x3f: Standards Action or IESG Approval. permanent, greater than 0x3f: Specification Required. first unassigned codepoint: Standards Action. values 31 * N + 27 (for integer values of N): Reserved. Jana Iyengar Ian Swett Martin Thomson |
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RFC 9000
provisional: Expert Review. provisional registration Date field update: First Come First Served. permanent: Specification Required. first unassigned codepoint: Standards Action. value 0x?a?a?a?a: Reserved. Jana Iyengar Ian Swett Martin Thomson |
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| Radius Types | |
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| Real Time Streaming Protocol (RTSP)/1.0 Parameters | |
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| Real-time Inter-network Defense (RID) | |
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| Real-Time Streaming Protocol (RTSP) 2.0 Parameters | |
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| Real-Time Transport Protocol (RTP) Parameters | |
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RFC 6285
1xx: Informational. 2xx: Success. 3xx: Redirection. 4xx: RTP Receiver (RTP_Rx) Error. 5xx: Burst/Retransmission Source (BRS) Error. Specification Required |
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| Realm Specific IP (RSIP) Parameters | |
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| Realtime Traffic Flow Measurement (RTFM) | |
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RFC 2722
0-511: IETF Review. 512-1023: First Come First Served. 1024 and above: Reserved for Private Use. |
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| Registrar IDs | |
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Assigned by ICANN |
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| Registration Data Access Protocol (RDAP) | |
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RFC 9560
Specification Required Scott Hollenbeck Andrew Newton Mario Loffredo Pawel Kowalik Jasdip Singh |
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| Registry for the Session Initiation Protocol (SIP) NAPTR Resource Record Services Field | |
| Relay User Equipment (RUE) | |
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| Reliable Multicast Transport (RMT) FEC Encoding IDs and FEC Instance IDs | |
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| Reliable Server Pooling (RSerPool) Parameters | |
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| Remote Attestation Procedures (RATS) | |
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| Remote Direct Data Placement | |
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| Remote Direct Data Placement (RDDP) | |
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| Remote Framebuffer (RFB) | |
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| Remote Procedure Call (RPC) | |
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| Remote Procedure Call (RPC) Program Numbers | |
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RFC 5531
Up to 100 numbers: First Come First Served. 101-1000 numbers: Specification Required. More than 1000 numbers: IESG Approval. |
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| Reputation Parameters | |
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| Reserved IPv6 Interface Identifiers | |
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| REsource LOcation And Discovery (RELOAD) | |
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RFC 6940
1-32767: Standards Action. 32768-61440: Expert Review. Marc Petit-Huguenin (primary) Cullen Jennings (secondary) |
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RFC 6940
0x00000001-0x7fffffff: Standards Action. 0x8000000-0xf0000000: Expert Review. Marc Petit-Huguenin (primary) Cullen Jennings (secondary) |
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RFC 6940
01-127: Standards Action. 128-254: Specification Required. Marc Petit-Huguenin (primary) Cullen Jennings (secondary) |
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| Resource Public Key Infrastructure (RPKI) | |
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| Resource Reservation Protocol (RSVP) Parameters | |
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RFC 3936
0-119: Standards Action. 120-123: Expert Review. 124-127: Reserved for Private Use. 128-183: Standards Action. 184-187: Expert Review. 188-191: Reserved for Private Use. 192-247: Standards Action. 248-251: Expert Review. 252-255: Reserved for Private Use. Dimitri Papadimitriou |
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RFC 3936
0-239: Standards Action. 240-251: Expert Review. 252-255: Reserved for Private Use. Dimitri Papadimitriou |
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| Resource Reservation Protocol-Traffic Engineering (RSVP-TE) Parameters | |
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| Resource-Oriented Lightweight Information Exchange (ROLIE) URN Parameters | |
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| RESTCONF Capability URNs | |
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| RObust Header Compression (ROHC) Profile Identifiers | |
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| RObust Header Compression (ROHC) Suboption Identifier Values | |
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| Roughtime | |
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draft-ietf-ntp-roughtime-19
0x01-0x0x7fffffff: IETF Review. 0x80000000-0xbfffffff: Experimental Use. 0xc0000000-0xffffffff: Private Use. |
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| Route Distinguisher Type Field | |
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| Routing in Fat Trees (RIFT) | |
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RFC 9692
Minor change (per RFC9692, Section 7): Expert Review. All other allocations: Specification Required. Tony Przygienda |
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RFC 9692
Minor change (per RFC9692, Section 7): Expert Review. All other allocations: Specification Required. Tony Przygienda |
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RFC 9692
Minor change (per RFC9692, Section 7): Expert Review. All other allocations: Specification Required. Tony Przygienda |
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RFC 9692
Minor change (per RFC9692, Section 7): Expert Review. All other allocations: Specification Required. Tony Przygienda |
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RFC 9692
Minor change (per RFC9692, Section 7): Expert Review. All other allocations: Specification Required. Tony Przygienda |
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RFC 9692
Minor change (per RFC9692, Section 7): Expert Review. All other allocations: Specification Required. Tony Przygienda |
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RFC 9692
Minor change (per RFC9692, Section 7): Expert Review. All other allocations: Specification Required. Tony Przygienda |
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RFC 9692
Minor change (per RFC9692, Section 7): Expert Review. All other allocations: Specification Required. Tony Przygienda |
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RFC 9692
Minor change (per RFC9692, Section 7): Expert Review. All other allocations: Specification Required. Tony Przygienda |
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RFC 9692
Minor change (per RFC9692, Section 7): Expert Review. All other allocations: Specification Required. Tony Przygienda |
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RFC 9692
Minor change (per RFC9692, Section 7): Expert Review. All other allocations: Specification Required. Tony Przygienda |
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RFC 9692
Minor change (per RFC9692, Section 7): Expert Review. All other allocations: Specification Required. Tony Przygienda |
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RFC 9692
Minor change (per RFC9692, Section 7): Expert Review. All other allocations: Specification Required. Tony Przygienda |
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RFC 9692
Minor change (per RFC9692, Section 7): Expert Review. All other allocations: Specification Required. Tony Przygienda |
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RFC 9692
Minor change (per RFC9692, Section 7): Expert Review. All other allocations: Specification Required. Tony Przygienda |
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RFC 9692
Minor change (per RFC9692, Section 7): Expert Review. All other allocations: Specification Required. Tony Przygienda |
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RFC 9692
Minor change (per RFC9692, Section 7): Expert Review. All other allocations: Specification Required. Tony Przygienda |
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RFC 9692
Minor change (per RFC9692, Section 7): Expert Review. All other allocations: Specification Required. Tony Przygienda |
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RFC 9692
Minor change (per RFC9692, Section 7): Expert Review. All other allocations: Specification Required. Tony Przygienda |
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RFC 9692
Minor change (per RFC9692, Section 7): Expert Review. All other allocations: Specification Required. Tony Przygienda |
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RFC 9692
Minor change (per RFC9692, Section 7): Expert Review. All other allocations: Specification Required. Tony Przygienda |
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RFC 9692
Minor change (per RFC9692, Section 7): Expert Review. All other allocations: Specification Required. Tony Przygienda |
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RFC 9692
Minor change (per RFC9692, Section 7): Expert Review. All other allocations: Specification Required. Tony Przygienda |
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RFC 9692
Minor change (per RFC9692, Section 7): Expert Review. All other allocations: Specification Required. Tony Przygienda |
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RFC 9692
Minor change (per RFC9692, Section 7): Expert Review. All other allocations: Specification Required. Tony Przygienda |
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RFC 9692
Minor change (per RFC9692, Section 7): Expert Review. All other allocations: Specification Required. Tony Przygienda |
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RFC 9692
Minor change (per RFC9692, Section 7): Expert Review. All other allocations: Specification Required. Tony Przygienda |
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RFC 9692
Minor change (per RFC9692, Section 7): Expert Review. All other allocations: Specification Required. Tony Przygienda |
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RFC 9692
Minor change (per RFC9692, Section 7): Expert Review. All other allocations: Specification Required. Tony Przygienda |
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RFC 9692
Minor change (per RFC9692, Section 7): Expert Review. All other allocations: Specification Required. Tony Przygienda |
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RFC 9692
Minor change (per RFC9692, Section 7): Expert Review. All other allocations: Specification Required. Tony Przygienda |
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RFC 9692
Minor change (per RFC9692, Section 7): Expert Review. All other allocations: Specification Required. Tony Przygienda |
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RFC 9692
Minor change (per RFC9692, Section 7): Expert Review. All other allocations: Specification Required. Tony Przygienda |
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RFC 9692
Minor change (per RFC9692, Section 7): Expert Review. All other allocations: Specification Required. Tony Przygienda |
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RFC 9692
Minor change (per RFC9692, Section 7): Expert Review. All other allocations: Specification Required. Tony Przygienda |
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| Routing Information Protocol (RIP) Parameters | |
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| Routing Protocol for Low Power and Lossy Networks (RPL) | |
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| Routing Protocol for Low Power and Lossy Networks (RPL) Routing Metric/Constraint | |
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| RSVP-TE OAM Configuration Registry | |
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| RTP Control Protocol Extended Reports (RTCP XR) Block Type Registry | |
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| RTP Control Protocol Extended Reports (RTCP XR) Session Description Protocol (SDP) Parameters Registry | |
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| Scalable Adaptive Multicast (SAM) Baseline | |
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| Secret Key Transaction Authentication for DNS (TSIG) Algorithm Names | |
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| Secure Shell (SSH) Protocol Parameters | |
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| Security Event Token (SET) | |
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| Security External Enumeration Registry | |
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| Security Label Format Selection | |
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| Security Parameters Index (SPI) Parameters | |
| security.txt Fields | |
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| Segment Routing | |
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RFC 8986
0: Reserved. 1-32767: First Come First Served. 32768-34815: Private Use. 34816-65534: Reserved. 65535: Reserved. |
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| Selective P-Multicast Service Interface (S-PMSI) Parameters | |
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| Semantic Definition Format (SDF) | |
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| Sender Policy Framework (SPF) Parameters | |
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| Sensor Measurement Lists (SenML) | |
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| Server Cache Synchronization Protocol (SCSP) Parameters | |
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| Service Function Chaining (SFC) Active Operations, Administration, and Maintenance (OAM) | |
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RFC 9516
0-175: IETF Review. 176-239: First Come First Served. 240-251: Experimental Use. 252-254: Private Use. |
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RFC 9516
0-175: IETF Review. 176-239: First Come First Served. 240-251: Experimental Use. 252-254: Private Use. |
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RFC 9516
0-175: IETF Review. 176-239: First Come First Served. 240-251: Experimental Use. 252-254: Private Use. |
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| Service Function Chaining Service Function Types | |
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| Service Location Protocol (SLP) Remote Service Discovery | |
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| Service Location Protocol Version 2 (SLPv2) Cryptographic BSD Codes | |
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| Service Location Protocol Version 2 (SLPv2) Registrations | |
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| Service Location Protocol, Version 2 (SLPv2) Error Numbers | |
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| Service Location Protocol, Version 2 (SLPv2) Function IDs | |
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| Service Names and Transport Protocol Port Numbers | |
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RFC 6335
TCP/UDP: Joe Touch; Eliot Lear Kumiko Ono Wes Eddy Brian Trammell and Michael Scharf SCTP: Michael Tuexen DCCP: Eddie Kohler and Yoshifumi Nishida |
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| Session Description Protocol (SDP) Parameters | |
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| Session Initiation Protocol (SIP) Common Log Format (CLF) Parameters | |
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| Session Initiation Protocol (SIP) Event Types Namespace | |
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| Session Initiation Protocol (SIP) Parameters | |
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| Session Initiation Protocol (SIP) Privacy Header Values | |
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| Session Peering Provisioning Framework (SPPF) Organization Identifier Type Namespaces | |
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| Session Traversal Utilities for NAT (STUN) Parameters | |
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RFC 8489
0x0000-0x3FFF: IETF Review. 0x4000-0x7FFF: Expert Review. 0x8000-0xBFFF: IETF Review. 0xC000-0xFFFF: Expert Review. Dan Wing |
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| SFrame | |
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RFC 9605
0-0xEFFF: Specification Required. 0-0xEFFF: Standards Action. 0xF000-0xFFFF: Private Use. Richard Barnes (primary) Emad Omara (secondary) |
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| Shim6 Parameters | |
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| Sieve Extensions | |
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RFC 5435
Vendor-controlled: First Come First Served. IETF-controlled: Specification Required. Barry Leiba Alexey Melnikov |
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RFC 5183
name begins with "vnd.": First Come First Served. standardized (no "vnd." prefix): Standards track or experimental RFC. |
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RFC 5228
vendor-controlled (name begins with "vnd."): First Come First Served. IETF-controlled (no "vnd." prefix): Standards track or IESG-approved experimental RFC. |
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| SIG (0) Algorithm Numbers | |
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| Signaling Compression (SigComp) Registry | |
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| Signaling User Adaptation Layer Assignments | |
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| Simple Authentication and Security Layer (SASL) Mechanisms | |
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RFC 4422
First Come First Served for mechanisms. Expert Review with mailing list for family name registrations. For names beginning with "GS2-", see RFC 5801. For names beginning with "SCRAM-", see RFC7677. Simon Josefsson |
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| Simple Certificate Enrollment Protocol (SCEP) | |
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| Simple Gateway Monitoring Protocol (SGMP) Vendor Specific Codes (Obsolete) | |
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| Simple Mail Transfer Protocol (SMTP) Enhanced Status Codes Registry | |
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| Simple Network Management Protocol (SNMP) Number Spaces | |
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| Simple Two-way Active Measurement Protocol (STAMP) | |
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RFC 9503
31-12: IETF Review. 11-8: First Come First Served. 7-4: Experimental Use. 3-0: Private Use. |
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RFC 9503
1-175: IETF Review. 176-239: First Come First Served. 240-251: Experimental Use. 252-254: Private Use. |
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RFC 8972
1-127: IETF Review. 128-239: First Come First Served. 240-249: Experimental Use. 250-254: Private Use. |
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RFC 8972
1-175: IETF Review. 176-239: First Come First Served. 240-251: Experimental Use. 252-254: Private Use. |
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RFC 8972
1-127: IETF Review. 128-239: First Come First Served. 240-249: Experimental Use. 250-254: Private Use. |
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RFC 8972
1-127: IETF Review. 128-239: First Come First Served. 240-249: Experimental Use. 250-254: Private Use. |
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RFC 8972
1-175: IETF Review. 176-239: First Come First Served. 240-251: Experimental Use. 252-254: Private Use. |
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| SMTP MTA Strict Transport Security (MTA-STS) | |
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| Snoop Datalink Types | |
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| SOCKS Methods | |
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| Software ID Values | |
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RFC 9393
0-127: Standards Action with Expert Review. 128-255: Specification Required. Charles Schmidt Jessica Fitzgerald-McKay Henk Birkholz |
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RFC 9393
0-127: Standards Action with Expert Review. 128-255: Specification Required. Charles Schmidt Jessica Fitzgerald-McKay Henk Birkholz |
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RFC 9393
0-32767: Standards Action with Expert Review. 32768-65535: Specification Required. Charles Schmidt Jessica Fitzgerald-McKay Henk Birkholz |
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RFC 9393
0-127: Standards Action with Expert Review. 128-255: Specification Required. Charles Schmidt Jessica Fitzgerald-McKay Henk Birkholz |
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RFC 9393
0-16383: Standards Action with Expert Review. 16384-65535: Specification Required. Charles Schmidt Jessica Fitzgerald-McKay Henk Birkholz |
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| Software Update for the Internet of Things (SUIT) | |
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draft-ietf-suit-manifest-34
less than -255: Private Use. -255 to 255: Standards Action. greater than 255: Specification Required. Brendan Moran Hannes Tschofenig |
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draft-ietf-suit-manifest-34
less than -255: Private Use. -255 to 255: Standards Action. greater than 255: Specification Required. Brendan Moran Hannes Tschofenig |
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draft-ietf-suit-manifest-34
less than -255: Private Use. -255 to 255: Standards Action. greater than 255: Specification Required. Brendan Moran Hannes Tschofenig |
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draft-ietf-suit-manifest-34
less than -255: Private Use. -255 to 255: Standards Action. greater than 255: Specification Required. Brendan Moran Hannes Tschofenig |
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draft-ietf-suit-manifest-34
less than -255: Private Use. -255 to 255: Standards Action. greater than 255: Specification Required. Brendan Moran Hannes Tschofenig |
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draft-ietf-suit-manifest-34
less than -255: Private Use. -255 to 255: Standards Action. greater than 255: Specification Required. Brendan Moran Hannes Tschofenig |
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draft-ietf-suit-manifest-34
less than -255: Private Use. -255 to 255: Standards Action. greater than 255: Specification Required. Brendan Moran Hannes Tschofenig |
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draft-ietf-suit-report-19
-4294967296 to -65537: First Come First Served. -65536 to -257: Specification Required. -256 to 255: Standards Action With Expert Review. 256 to 65535: Specification Required. 65536 to 4294967295: First Come First Served. |
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draft-ietf-suit-report-19
-4294967296 to -65537: First Come First Served. -65536 to -257: Specification Required. -256 to 255: Standards Action With Expert Review. 256 to 65535: Specification Required. 65536 to 4294967295: First Come First Served. |
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draft-ietf-suit-report-19
-4294967296 to -65537: First Come First Served. -65536 to -257: Specification Required. -256 to 255: Standards Action With Expert Review. 256 to 65535: Specification Required. 65536 to 4294967295: First Come First Served. |
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draft-ietf-suit-report-19
-4294967296 to -65537: First Come First Served. -65536 to -257: Specification Required. -256 to 255: Standards Action With Expert Review. 256 to 65535: Specification Required. 65536 to 4294967295: First Come First Served. |
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| Special People Numbers Registry (SPNR) | |
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Not an IETF Registry. Contact IANA |
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| Special-Purpose Autonomous System (AS) Numbers | |
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| Special-Use Domain Names | |
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| STARTTLS Validation Result Types | |
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| Straightforward-NAPTR (S-NAPTR) Parameters | |
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| Stream Control Transmission Protocol (SCTP) Parameters | |
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| Stringprep Profiles | |
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| Structure of Management Information (SMI) Numbers (MIB Module Registrations) | |
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Not Defined ? |
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Not Defined ? |
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IETF Review |
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| Structured Data Exchange Format (SDXF) | |
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| Subsequent Address Family Identifiers (SAFI) Parameters | |
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RFC 4760
1-63: Standards Action. 64-127: First Come First Served. 128-240: Some recognized assignments below, others Reserved. 241-254: Reserved for Private Use. |
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| SUN Remote Procedure Call (RPC) Numbers - Obsolete | |
| syslog Parameters | |
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| System for Cross-domain Identity Management (SCIM) Schema URIs | |
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RFC 7643
"core" and "API" schemas: RFC and Expert Review Required. All other schemas: Expert Review. Phil Hunt Paulo Jorge N. Correia |
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RFC 7643
"core" and "API" schemas: RFC and Expert Review Required. All other schemas: Expert Review. Phil Hunt Paulo Jorge N. Correia |
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| TCP Convert Protocol (Convert) Parameters | |
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RFC 8803
1-127: IETF Review. 128-191: Specification Required. 192-255: Private Use. Mohamed Boucadair (primary) Olivier Bonaventure (secondary) |
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RFC 8803
1-127: IETF Review. 128-191: Specification Required. 192-255: Private Use. Mohamed Boucadair (primary) Olivier Bonaventure (secondary) |
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| Telephony Routing over IP (TRIP) Parameters | |
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| Telnet Options | |
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| Terminal Type Names | |
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| The Binary Floor Control Protocol (BFCP) Parameters | |
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| The Extensible Authentication Protocol Mechanism for the Generic Security Service Application Programming Interface (GSS-EAP) Parameters | |
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| Time Zone Data Distribution Service (TZDIST) Parameters | |
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| Timed Efficient Stream Loss-tolerant Authentication (TESLA) Parameters | |
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| TLS-based Posture Transport Protocol (PT-TLS) | |
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| Token Binding Protocol | |
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| Trailer Types | |
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| Transfer Encodings | |
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| Transmission Control Protocol (TCP) Header Flags | |
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| Transmission Control Protocol (TCP) Parameters | |
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| Transparent Interconnection of Lots of Links (TRILL) Parameters | |
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RFC 8377
Ethertypes are assigned by the IEEE Registration Authority. Updates to this registry are coordinated with the designated expert. Donald Eastlake (primary) Sue Hares (secondary) |
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| Transport Layer Security (TLS) | |
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RFC 5878, RFC 8447, draft-ietf-tls-tls12-frozen-08, RFC 9847
0-63: IETF Review. 64-223: Specification Required. 224-255: Reserved for Private Use. Yoav Nir Rich Salz Nick Sullivan |
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RFC 7924, draft-ietf-tls-tls12-frozen-08, RFC 9847
0-63: Standards Action. 64-223: Specification Required. Yoav Nir Rich Salz Nick Sullivan |
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RFC 8879, draft-ietf-tls-tls12-frozen-08, RFC 9847
1-255: IETF Review. 256-16383: Specification Required. 16384-65535: Experimental Use. Yoav Nir Rich Salz Nick Sullivan |
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RFC 6091, draft-ietf-tls-rfc8446bis-13, RFC 8447, draft-ietf-tls-tls12-frozen-08, RFC 9847
"Recommended" set to/transitioning from "Y" or "D": Either Standards Action With Expert Review or IESG Approval. "Recommended" set to "N," not transitioning from another value: Specification Required. Yoav Nir Rich Salz Nick Sullivan |
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draft-ietf-tls-rfc8446bis-13, RFC 8447, RFC 9147, draft-ietf-tls-tls12-frozen-08, RFC 9847
"Recommended" set to/transitioning from "Y" or "D": Either Standards Action With Expert Review or IESG Approval. "Recommended" set to "N," not transitioning from another value: Specification Required. Yoav Nir Rich Salz Nick Sullivan |
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RFC 5246, RFC 8447, draft-ietf-tls-tls12-frozen-08, RFC 9847
0-223 ("Recommended" set to/transitioning from "Y" or "D"): Either Standards Action with Expert Review or IESG Approval. 0-223 ("Recommended" set to "N," not transitioning from another value): Specification Required. 224-255: Reserved for Private Use. Yoav Nir Rich Salz Nick Sullivan |
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RFC 8422, draft-ietf-tls-tls12-frozen-08, RFC 9847
Specification Required Yoav Nir Rich Salz Nick Sullivan |
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RFC 8422, draft-ietf-tls-tls12-frozen-08, RFC 9847
Specification Required Yoav Nir Rich Salz Nick Sullivan |
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draft-ietf-tls-rfc8446bis-13, RFC 8447, RFC 9146, draft-ietf-tls-tls12-frozen-08, RFC 9847
"Recommended" set to/transitioning from "Y" or "D": Either Standards Action With Expert Review or IESG Approval. "Recommended" set to "N," not transitioning from another value: Specification Required. Yoav Nir Rich Salz Nick Sullivan |
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RFC 5246, RFC 8447, RFC 9155, draft-ietf-tls-tls12-frozen-08, RFC 9847
0-223 ("Recommended" set to/transitioning from "Y" or "D"): Either Standards Action with Expert Review or IESG Approval. 0-223 ("Recommended" set to "N," not transitioning from another value): Specification Required. 224-255: Reserved for Private Use. Yoav Nir Rich Salz Nick Sullivan |
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RFC 6520, RFC 8447, draft-ietf-tls-tls12-frozen-08, RFC 9847
Expert Review Yoav Nir Rich Salz Nick Sullivan |
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RFC 6520, RFC 8447, draft-ietf-tls-tls12-frozen-08, RFC 9847
Expert Review Yoav Nir Rich Salz Nick Sullivan |
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RFC 9258, draft-ietf-tls-tls12-frozen-08, RFC 9847
0x0000-0xfeff: Specification Required. 0xff00-0xffff: Private Use. Rich Salz Nick Sullivan |
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draft-ietf-tls-rfc8446bis-13, draft-ietf-tls-tls12-frozen-08, RFC 9847
"Recommended" set to/transitioning from "Y" or "D": Either Standards Action With Expert Review or IESG Approval. "Recommended" set to "N," not transitioning from another value: Specification Required. Yoav Nir Rich Salz Nick Sullivan |
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RFC 5246, RFC 8447, RFC 9155, draft-ietf-tls-tls12-frozen-08, RFC 9847
0-223 ("Recommended" set to/transitioning from "Y" or "D"): Either Standards Action with Expert Review or IESG Approval. 0-223 ("Recommended" set to "N," not transitioning from another value): Specification Required. 224-255: Reserved for Private Use. Yoav Nir Rich Salz Nick Sullivan |
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draft-ietf-tls-rfc8446bis-13, draft-ietf-tls-tls12-frozen-08, RFC 9847
"Recommended" set to/transitioning from "Y" or "D": Either Standards Action With Expert Review or IESG Approval. "Recommended" set to "N," not transitioning from another value: Specification Required. Yoav Nir Rich Salz Nick Sullivan |
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RFC 4680, RFC 8447, draft-ietf-tls-tls12-frozen-08, RFC 9847
0-16385: Standards Action. 16386-65279: IETF Review. 65280-65535: Reserved for Private Use. |
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RFC 8422, RFC 7919, draft-ietf-tls-rfc8446bis-13, RFC 8447, draft-ietf-tls-tls12-frozen-08, RFC 9847, draft-ietf-tls-hybrid-design-16
0-255 ("Recommended" set to/transitioning from "Y" or "D"): Either Standards Action with Expert Review or IESG Approval. 0-255 ("Recommended" set to "N," not transitioning from another value): Specification Required. 256-511 ("Recommended" set to/transitioning from "Y" or "D"): Either Standards Action with Expert Review or IESG Approval. 256-511 ("Recommended" set to "N," not transitioning from another value): Specification Required. 512-65535 ("Recommended" set to/transitioning from "Y" or "D"): Either Standards Action with Expert Review or IESG Approval. 512-65535 ("Recommended" set to "N," not transitioning from another value): Specification Required. Yoav Nir Rich Salz Nick Sullivan |
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RFC 4681, draft-ietf-tls-tls12-frozen-08, RFC 9847
0-63: Standards Action. 64-223: Specification Required. 224-255: Reserved for Private Use. Yoav Nir Rich Salz Nick Sullivan |
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| Trusted Execution Environment Provisioning (TEEP) | |
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draft-ietf-teep-protocol-26
0-23: Standards Action. 24-254: Specification Required. 255: Private Use. |
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| Tunnel Setup Protocol (TSP) Parameters | |
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| Two-way Active Measurement Protocol (TWAMP) Parameters | |
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| UDP Speed Test Protocol (UDPSTP) | |
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RFC 9946
0x0000: Reserved. 0x0001-0x7F00: Specification Required. 0x7F01-0x7FE0: Experimental Use. 0x7FE1-0x7FFF: Private Use. 0x8000-0xFFFE: IETF Review. 0xFFFF: Reserved. Ruediger Geib Len Ciavattone Xiao Min |
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RFC 9946
0-19: Reserved. 20-40960: IETF Review. 40961-53248: Specification Required. 53249-65534: Experimental Use. 65535: Reserved. Ruediger Geib Len Ciavattone Xiao Min |
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RFC 9946
0-127: IETF Review. 128-239: Specification Required. 240-249: Experimental Use. 250-254: Private Use. 255: Reserved. Ruediger Geib Len Ciavattone Xiao Min |
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RFC 9946
0-127: IETF Review. 128-239: Specification Required. 240-249: Experimental Use. 250-254: Private Use. 255: Reserved. Ruediger Geib Len Ciavattone Xiao Min |
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RFC 9946
0-127: IETF Review. 128-239: Specification Required. 240-249: Experimental Use. 250-254: Private Use. 255: Reserved. Ruediger Geib Len Ciavattone Xiao Min |
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| Unidirectional Lightweight Encapsulation (ULE) Next-Header Registry | |
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| Uniform Resource Identifier (URI) Schemes | |
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RFC 9758
0-0xFFFF: Expert Review. 0x10000-0x3FFFFFFF: Expert Review. 0x40000000-0x7FFFFFFF: Experimental Use. 0x80000000-0xFFFFFFFF: Reserved. >=0x100000000: Reserved. Edward Birrane Rick Taylor |
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RFC 9758
1-127: Private Use. 128-255: Standards Action. 0x0100-0x7FFF: Private Use. 0x8000-0xFFFF: Specification Required. 0x10000-0xFFFFFFFF: Private Use. >=0x100000000: Reserved for future expansion. Edward Birrane Rick Taylor Brian Sipos |
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RFC 7595, RFC 8615, draft-ietf-core-href-29
Permanent: Expert Review. Provisional: First Come First Served. Historical: Expert Review. CRI Scheme Number field: 0-999: Expert Review. CRI Scheme Number field: 1000-20000: First Come First Served. Registry: Mark Baker (primary) Murray Kucherawy (backup) CRI Scheme Number field: Henk Birkholz Marco Tiloca |
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| Uniform Resource Name (URN) Namespace for IETF Use | |
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| Uniform Resource Names (URN) | |
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| User Datagram Protocol (UDP) | |
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| UUID | |
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| vCard Elements | |
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RFC 6350
No namespace specified: Expert Review and RFC Required. Vendor namespace specified: First Come First Served. Primary: Simon Perreault; Backup: Peter Saint-Andre |
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RFC 6350
No namespace specified: Expert Review and RFC Required. Vendor namespace specified: First Come First Served. Primary: Simon Perreault; Backup: Peter Saint-Andre |
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| VCDIFF Secondary Compressor ID Values | |
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RFC 3284
RFC or peer-reviewed permanent and readily available reference. Subject to the above, name assignments are First Come First Served. |
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| Vectors of Trust (VoT) | |
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| 'version' symbols used within the ISUP and QSIG | |
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| Virtual Network Computing (VNC) Uniform Resource Identifier (URI) | |
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| WAVE and AVI Codec Registries (Historic Registry) | |
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| Web Authentication (WebAuthn) | |
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| Web Push Parameters | |
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| Webfinger Parameters | |
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| WebRTC-HTTP Ingestion Protocol (WHIP) | |
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| WebSocket Protocol Registries | |
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RFC 6455
1000-2999: Standards Action, Specification Required or IESG Review. 3000-3999: First Come First Served. Alexey Melnikov |
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RFC 6455
Standard Version Numbers: IETF Review. Interim Version Numbers: Expert Review. HYBI WG Chairs |
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| Wrapped Encapsulating Security Payload (WESP) Flags | |
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| X.25 Type Numbers | |
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Not assigned by IANA |
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| Xerox Network System (XNS) Protocol Types | |
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Not assigned by IANA |
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Not assigned by IANA |
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| XML Evidence Record Syntax (XMLERS) | |
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| XML Security URIs | |
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| YANG Geographic Location Parameters | |
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| YANG Module Tags | |
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| YANG Modules | |
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RFC 9132
See the DOTS Status Codes, DOTS Conflict Status Codes, DOTS Conflict Cause Codes, and DOTS Attack Status Codes registries. |
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draft-ietf-netconf-http-client-server-31
See the TLS Application-Layer Protocol Negotiation (ALPN) Protocol IDs registry. |
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draft-ietf-lsr-ospf-ls-link-infinity-25
New values must not be directly added to the "iana-ospf-functional-cap-bits" YANG module. They must instead be added to the "OSPF Router Functional Capability Bits" registry in the Open Shortest Path First (OSPF) Parameters registry group. |
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| YANG Parameters | |
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| YANG SIDs | |
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RFC 9595
0: IESG Approval. 1000: RFC Required (or Expert Review if YANG comes from existing RFC). 60000: Reserved for Experimental Use. 100000: RFC Required (or Expert Review if YANG comes from existing RFC). 300000: Reserved. Michel Veillette Alexander Pelov Laurent Toutain |
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| No registries match your search. | |