| 1928 | SOCKS Protocol Version 5M. Leech, M. Ganis, Y. Lee, R. Kuris, D. Koblas, L. Jones | Proposed Standard | March 1996 |
| 2119 | Key words for use in RFCs to Indicate Requirement LevelsS. Bradner | Best Current Practice | March 1997 |
| 2616 | Hypertext Transfer Protocol -- HTTP/1.1R. Fielding, J. Gettys, J. Mogul, H. Frystyk, L. Masinter, P. Leach, T. Berners-Lee · obsoleted by RFC 7230, RFC 7231, RFC 7232, RFC 7233, RFC 7234, RFC 7235 | Draft Standard | June 1999 |
| 2817 | Upgrading to TLS Within HTTP/1.1R. Khare, S. Lawrence | Proposed Standard | May 2000 |
| 2818 | HTTP Over TLSE. Rescorla · obsoleted by RFC 9110 | Informational | May 2000 |
| 3629 | UTF-8, a transformation format of ISO 10646F. Yergeau | Internet Standard | November 2003 |
| 3864 | Registration Procedures for Message Header FieldsG. Klyne, M. Nottingham, J. Mogul | Best Current Practice | September 2004 |
| 3986 | Uniform Resource Identifier (URI): Generic SyntaxT. Berners-Lee, R. Fielding, L. Masinter | Internet Standard | January 2005 |
| 3987 | Internationalized Resource Identifiers (IRIs)M. Duerst, M. Suignard | Proposed Standard | January 2005 |
| 4086 | Randomness Requirements for SecurityD. Eastlake 3rd, J. Schiller, S. Crocker | Best Current Practice | June 2005 |
| 4122 | A Universally Unique IDentifier (UUID) URN NamespaceP. Leach, M. Mealling, R. Salz · obsoleted by RFC 9562 | Proposed Standard | July 2005 |
| 4270 | Attacks on Cryptographic Hashes in Internet ProtocolsP. Hoffman, B. Schneier | Informational | December 2005 |
| 4648 | The Base16, Base32, and Base64 Data EncodingsS. Josefsson | Proposed Standard | October 2006 |
| 5226 | Guidelines for Writing an IANA Considerations Section in RFCsT. Narten, H. Alvestrand · obsoleted by RFC 8126 | Best Current Practice | May 2008 |
| 5234 | Augmented BNF for Syntax Specifications: ABNFD. Crocker, Ed., P. Overell | Internet Standard | January 2008 |
| 5246 | The Transport Layer Security (TLS) Protocol Version 1.2T. Dierks, E. Rescorla · obsoleted by RFC 8446, RFC 9846 | Proposed Standard | August 2008 |
| 5321 | Simple Mail Transfer ProtocolJ. Klensin | Draft Standard | October 2008 |
| 5741 | RFC Streams, Headers, and BoilerplatesL. Daigle, Ed., O. Kolkman, Ed., IAB · obsoleted by RFC 7841 | Informational | December 2009 |
| 6066 | Transport Layer Security (TLS) Extensions: Extension DefinitionsD. Eastlake 3rd | Proposed Standard | January 2011 |
| 6202 | Known Issues and Best Practices for the Use of Long Polling and Streaming in Bidirectional HTTPS. Loreto, P. Saint-Andre, S. Salsano, G. Wilkins | Informational | April 2011 |
| 6265 | HTTP State Management MechanismA. Barth | Proposed Standard | April 2011 |
| 6454 | The Web Origin ConceptA. Barth | Proposed Standard | December 2011 |