RFC Highlights Reference
Most-cited Internet RFCs by number with a one-line title.
| RFC | Title |
|---|---|
| RFC 791 | Internet Protocol (IPv4) |
| RFC 793 | Transmission Control Protocol |
| RFC 768 | User Datagram Protocol |
| RFC 1035 | Domain Names — Implementation and Specification |
| RFC 2616 | HTTP/1.1 (obsolete; see RFC 7230-7235 / 9110) |
| RFC 7230 | HTTP/1.1 Message Syntax and Routing |
| RFC 7231 | HTTP/1.1 Semantics and Content |
| RFC 7234 | HTTP/1.1 Caching |
| RFC 7540 | HTTP/2 |
| RFC 7541 | HPACK — Header Compression for HTTP/2 |
| RFC 8446 | TLS 1.3 |
| RFC 8200 | Internet Protocol, Version 6 (IPv6) Specification |
| RFC 9000 | QUIC: A UDP-Based Multiplexed and Secure Transport |
| RFC 9110 | HTTP Semantics |
| RFC 9112 | HTTP/1.1 |
| RFC 9113 | HTTP/2 |
| RFC 9114 | HTTP/3 |
| RFC 9204 | QPACK — Header Compression for HTTP/3 |
| RFC 5246 | TLS 1.2 (superseded by 8446) |
| RFC 6238 | TOTP — Time-Based One-Time Password |
| RFC 4226 | HOTP — HMAC-Based One-Time Password |
| RFC 3986 | Uniform Resource Identifier (URI) |
| RFC 4648 | Base16, Base32, Base64 Encodings |
| RFC 7519 | JSON Web Token (JWT) |
| RFC 6749 | OAuth 2.0 |
| RFC 7252 | CoAP — Constrained Application Protocol |
| RFC 7950 | YANG |
| RFC 8949 | CBOR — Concise Binary Object Representation |
| RFC 4291 | IPv6 Addressing Architecture |
| RFC 2818 | HTTP Over TLS |
| RFC 6455 | WebSocket Protocol |
| RFC 8259 | JSON Data Interchange Format |
| RFC 1918 | Address Allocation for Private Internets |
| RFC 5321 | SMTP |
| RFC 5322 | Internet Message Format |
| RFC 3501 | IMAP4rev1 |
| RFC 1939 | POP3 |
About this tool
A list of pivotal RFCs — from IP, TCP and DNS to HTTP/3, QUIC, TLS 1.3, OAuth and JWT — for quick recognition when you see RFC NNNN in a spec.