| 2119 | Key words for use in RFCs to Indicate Requirement LevelsS. Bradner | Best Current Practice | March 1997 |
| 2244 | ACAP -- Application Configuration Access ProtocolC. Newman, J. G. Myers | Proposed Standard | November 1997 |
| 2426 | vCard MIME Directory ProfileF. Dawson, T. Howes · obsoleted by RFC 6350 | Proposed Standard | September 1998 |
| 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 |
| 2617 | HTTP Authentication: Basic and Digest Access AuthenticationJ. Franks, P. Hallam-Baker, J. Hostetler, S. Lawrence, P. Leach, A. Luotonen, L. Stewart · obsoleted by RFC 7235, RFC 7615, RFC 7616, RFC 7617 | Draft Standard | June 1999 |
| 2782 | A DNS RR for specifying the location of services (DNS SRV)A. Gulbrandsen, P. Vixie, L. Esibov | Proposed Standard | February 2000 |
| 2818 | HTTP Over TLSE. Rescorla · obsoleted by RFC 9110 | Informational | May 2000 |
| 3253 | Versioning Extensions to WebDAV (Web Distributed Authoring and Versioning)G. Clemm, J. Amsden, T. Ellison, C. Kaler, J. Whitehead | Proposed Standard | March 2002 |
| 3688 | The IETF XML RegistryM. Mealling | Best Current Practice | January 2004 |
| 3744 | Web Distributed Authoring and Versioning (WebDAV) Access Control ProtocolG. Clemm, J. Reschke, E. Sedlar, J. Whitehead | Proposed Standard | May 2004 |
| 4510 | Lightweight Directory Access Protocol (LDAP): Technical Specification Road MapK. Zeilenga, Ed. | Proposed Standard | June 2006 |
| 4790 | Internet Application Protocol Collation RegistryC. Newman, M. Duerst, A. Gulbrandsen | Proposed Standard | March 2007 |
| 4918 | HTTP Extensions for Web Distributed Authoring and Versioning (WebDAV)L. Dusseault, Ed. | Proposed Standard | June 2007 |
| 5051 | i;unicode-casemap - Simple Unicode Collation AlgorithmM. Crispin | Proposed Standard | October 2007 |
| 5246 | The Transport Layer Security (TLS) Protocol Version 1.2T. Dierks, E. Rescorla · obsoleted by RFC 8446, RFC 9846 | Proposed Standard | August 2008 |
| 5280 | Internet X.509 Public Key Infrastructure Certificate and Certificate Revocation List (CRL) ProfileD. Cooper, S. Santesson, S. Farrell, S. Boeyen, R. Housley, W. Polk | Proposed Standard | May 2008 |
| 5397 | WebDAV Current Principal ExtensionW. Sanchez, C. Daboo | Proposed Standard | December 2008 |
| 5689 | Extended MKCOL for Web Distributed Authoring and Versioning (WebDAV)C. Daboo | Proposed Standard | September 2009 |
| 5741 | RFC Streams, Headers, and BoilerplatesL. Daigle, Ed., O. Kolkman, Ed., IAB · obsoleted by RFC 7841 | Informational | December 2009 |
| 6350 | vCard Format SpecificationS. Perreault | Proposed Standard | August 2011 |