| 1945 | Hypertext Transfer Protocol -- HTTP/1.0T. Berners-Lee, R. Fielding, H. Frystyk | Informational | May 1996 |
| 2119 | Key words for use in RFCs to Indicate Requirement LevelsS. Bradner | Best Current Practice | March 1997 |
| 3207 | SMTP Service Extension for Secure SMTP over Transport Layer SecurityP. Hoffman | Proposed Standard | February 2002 |
| 3986 | Uniform Resource Identifier (URI): Generic SyntaxT. Berners-Lee, R. Fielding, L. Masinter | Internet Standard | January 2005 |
| 4301 | Security Architecture for the Internet ProtocolS. Kent, K. Seo | Proposed Standard | December 2005 |
| 5273 | Certificate Management over CMS (CMC): Transport ProtocolsJ. Schaad, M. Myers · obsoleted by RFC 10003 | Proposed Standard | June 2008 |
| 5967 | The application/pkcs10 Media TypeS. Turner | Informational | August 2010 |
| 6265 | HTTP State Management MechanismA. Barth | Proposed Standard | April 2011 |
| 6402 | Certificate Management over CMS (CMC) UpdatesJ. Schaad · obsoleted by RFC 10002, RFC 10003, RFC 10004 | Proposed Standard | November 2011 |
| 7841 | RFC Streams, Headers, and BoilerplatesJ. Halpern, Ed., L. Daigle, Ed., O. Kolkman, Ed. | Informational | May 2016 |
| 8174 | Ambiguity of Uppercase vs Lowercase in RFC 2119 Key WordsB. Leiba | Best Current Practice | May 2017 |
| 8551 | Secure/Multipurpose Internet Mail Extensions (S/MIME) Version 4.0 Message SpecificationJ. Schaad, B. Ramsdell, S. Turner | Proposed Standard | April 2019 |
| 8689 | SMTP Require TLS OptionJ. Fenton | Proposed Standard | November 2019 |
| 8996 | Deprecating TLS 1.0 and TLS 1.1K. Moriarty, S. Farrell | Best Current Practice | March 2021 |
| 9110 | HTTP SemanticsR. Fielding, Ed., M. Nottingham, Ed., J. Reschke, Ed. | Internet Standard | June 2022 |
| 9112 | HTTP/1.1R. Fielding, Ed., M. Nottingham, Ed., J. Reschke, Ed. | Internet Standard | June 2022 |
| 9113 | HTTP/2M. Thomson, Ed., C. Benfield, Ed. | Proposed Standard | June 2022 |
| 9114 | HTTP/3M. Bishop, Ed. | Proposed Standard | June 2022 |
| 9205 | Building Protocols with HTTPM. Nottingham | Best Current Practice | June 2022 |
| 9325 | Recommendations for Secure Use of Transport Layer Security (TLS) and Datagram Transport Layer Security (DTLS)Y. Sheffer, P. Saint-Andre, T. Fossati | Best Current Practice | November 2022 |
| 9846 | The Transport Layer Security (TLS) Protocol Version 1.3E. Rescorla | Proposed Standard | July 2026 |
| 10002 | Certificate Management over CMS (CMC)J. Mandel, Ed., S. Turner, Ed. | Proposed Standard | July 2026 |