| 20 | ASCII format for network interchangeV.G. Cerf | Internet Standard | October 1969 |
| 2045 | Multipurpose Internet Mail Extensions (MIME) Part One: Format of Internet Message BodiesN. Freed, N. Borenstein | Draft Standard | November 1996 |
| 2119 | Key words for use in RFCs to Indicate Requirement LevelsS. Bradner | Best Current Practice | March 1997 |
| 2782 | A DNS RR for specifying the location of services (DNS SRV)A. Gulbrandsen, P. Vixie, L. Esibov | Proposed Standard | February 2000 |
| 3275 | (Extensible Markup Language) XML-Signature Syntax and ProcessingD. Eastlake 3rd, J. Reagle, D. Solo | Draft Standard | March 2002 |
| 3339 | Date and Time on the Internet: TimestampsG. Klyne, C. Newman | Proposed Standard | July 2002 |
| 3444 | On the Difference between Information Models and Data ModelsA. Pras, J. Schoenwaelder | Informational | January 2003 |
| 3553 | An IETF URN Sub-namespace for Registered Protocol ParametersM. Mealling, L. Masinter, T. Hardie, G. Klyne | Best Current Practice | June 2003 |
| 3688 | The IETF XML RegistryM. Mealling | Best Current Practice | January 2004 |
| 3986 | Uniform Resource Identifier (URI): Generic SyntaxT. Berners-Lee, R. Fielding, L. Masinter | Internet Standard | January 2005 |
| 4287 | The Atom Syndication FormatM. Nottingham, Ed., R. Sayre, Ed. | Proposed Standard | December 2005 |
| 5005 | Feed Paging and ArchivingM. Nottingham | Proposed Standard | September 2007 |
| 5023 | The Atom Publishing ProtocolJ. Gregorio, Ed., B. de hOra, Ed. | Proposed Standard | October 2007 |
| 5234 | Augmented BNF for Syntax Specifications: ABNFD. Crocker, Ed., P. Overell | Internet Standard | January 2008 |
| 6545 | Real-time Inter-network Defense (RID)K. Moriarty | Proposed Standard | April 2012 |
| 6546 | Transport of Real-time Inter-network Defense (RID) Messages over HTTP/TLSB. Trammell | Proposed Standard | April 2012 |
| 6749 | The OAuth 2.0 Authorization FrameworkD. Hardt, Ed. | Proposed Standard | October 2012 |
| 7486 | HTTP Origin-Bound Authentication (HOBA)S. Farrell, P. Hoffman, M. Thomas | Experimental | March 2015 |
| 7515 | JSON Web Signature (JWS)M. Jones, J. Bradley, N. Sakimura | Proposed Standard | May 2015 |
| 7516 | JSON Web Encryption (JWE)M. Jones, J. Hildebrand | Proposed Standard | May 2015 |
| 7525 | Recommendations for Secure Use of Transport Layer Security (TLS) and Datagram Transport Layer Security (DTLS)Y. Sheffer, R. Holz, P. Saint-Andre · obsoleted by RFC 9325 | Best Current Practice | May 2015 |
| 7616 | HTTP Digest Access AuthenticationR. Shekh-Yusef, Ed., D. Ahrens, S. Bremer | Proposed Standard | September 2015 |
| 7617 | The 'Basic' HTTP Authentication SchemeJ. Reschke | Proposed Standard | September 2015 |
| 7797 | JSON Web Signature (JWS) Unencoded Payload OptionM. Jones | Proposed Standard | February 2016 |
| 7804 | Salted Challenge Response HTTP Authentication MechanismA. Melnikov | Experimental | March 2016 |
| 7841 | RFC Streams, Headers, and BoilerplatesJ. Halpern, Ed., L. Daigle, Ed., O. Kolkman, Ed. | Informational | May 2016 |
| 7970 | The Incident Object Description Exchange Format Version 2R. Danyliw | Proposed Standard | November 2016 |
| 8126 | Guidelines for Writing an IANA Considerations Section in RFCsM. Cotton, B. Leiba, T. Narten | Best Current Practice | June 2017 |
| 8141 | Uniform Resource Names (URNs)P. Saint-Andre, J. Klensin | Proposed Standard | April 2017 |
| 8174 | Ambiguity of Uppercase vs Lowercase in RFC 2119 Key WordsB. Leiba | Best Current Practice | May 2017 |