| 2119 | Key words for use in RFCs to Indicate Requirement LevelsS. Bradner | Best Current Practice | March 1997 |
| 2392 | Content-ID and Message-ID Uniform Resource LocatorsE. Levinson | Proposed Standard | August 1998 |
| 3204 | MIME media types for ISUP and QSIG ObjectsE. Zimmerer, J. Peterson, A. Vemuri, L. Ong, F. Audet, M. Watson, M. Zonoun | Proposed Standard | December 2001 |
| 3261 | SIP: Session Initiation ProtocolJ. Rosenberg, H. Schulzrinne, G. Camarillo, A. Johnston, J. Peterson, R. Sparks, M. Handley, E. Schooler | Proposed Standard | July 2002 |
| 3325 | Private Extensions to the Session Initiation Protocol (SIP) for Asserted Identity within Trusted NetworksC. Jennings, J. Peterson, M. Watson | Informational | December 2002 |
| 3459 | Critical Content Multi-purpose Internet Mail Extensions (MIME) ParameterE. Burger | Proposed Standard | January 2003 |
| 3688 | The IETF XML RegistryM. Mealling | Best Current Practice | January 2004 |
| 3840 | Indicating User Agent Capabilities in the Session Initiation Protocol (SIP)J. Rosenberg, H. Schulzrinne, P. Kyzivat | Proposed Standard | August 2004 |
| 3966 | The tel URI for Telephone NumbersH. Schulzrinne | Proposed Standard | December 2004 |
| 4119 | A Presence-based GEOPRIV Location Object FormatJ. Peterson | Proposed Standard | December 2005 |
| 5012 | Requirements for Emergency Context Resolution with Internet TechnologiesH. Schulzrinne, R. Marshall, Ed. | Informational | January 2008 |
| 5139 | Revised Civic Location Format for Presence Information Data Format Location Object (PIDF-LO)M. Thomson, J. Winterbottom | Proposed Standard | February 2008 |
| 5226 | Guidelines for Writing an IANA Considerations Section in RFCsT. Narten, H. Alvestrand · obsoleted by RFC 8126 | Best Current Practice | May 2008 |
| 5322 | Internet Message FormatP. Resnick, Ed. | Draft Standard | October 2008 |
| 5491 | GEOPRIV Presence Information Data Format Location Object (PIDF-LO) Usage Clarification, Considerations, and RecommendationsJ. Winterbottom, M. Thomson, H. Tschofenig | Proposed Standard | March 2009 |
| 5582 | Location-to-URL Mapping Architecture and FrameworkH. Schulzrinne | Informational | September 2009 |
| 5621 | Message Body Handling in the Session Initiation Protocol (SIP)G. Camarillo | Proposed Standard | September 2009 |
| 5646 | Tags for Identifying LanguagesA. Phillips, Ed., M. Davis, Ed. | Best Current Practice | September 2009 |
| 5962 | Dynamic Extensions to the Presence Information Data Format Location Object (PIDF-LO)H. Schulzrinne, V. Singh, H. Tschofenig, M. Thomson | Proposed Standard | September 2010 |
| 5985 | HTTP-Enabled Location Delivery (HELD)M. Barnes, Ed. | Proposed Standard | September 2010 |
| 6350 | vCard Format SpecificationS. Perreault | Proposed Standard | August 2011 |
| 6351 | xCard: vCard XML RepresentationS. Perreault | Proposed Standard | August 2011 |
| 6443 | Framework for Emergency Calling Using Internet MultimediaB. Rosen, H. Schulzrinne, J. Polk, A. Newton | Informational | December 2011 |
| 6698 | The DNS-Based Authentication of Named Entities (DANE) Transport Layer Security (TLS) Protocol: TLSAP. Hoffman, J. Schlyter | Proposed Standard | August 2012 |
| 6838 | Media Type Specifications and Registration ProceduresN. Freed, J. Klensin, T. Hansen | Best Current Practice | January 2013 |
| 6848 | Specifying Civic Address Extensions in the Presence Information Data Format Location Object (PIDF-LO)J. Winterbottom, M. Thomson, R. Barnes, B. Rosen, R. George | Proposed Standard | January 2013 |
| 6881 | Best Current Practice for Communications Services in Support of Emergency CallingB. Rosen, J. Polk | Best Current Practice | March 2013 |
| 6973 | Privacy Considerations for Internet ProtocolsA. Cooper, H. Tschofenig, B. Aboba, J. Peterson, J. Morris, M. Hansen, R. Smith | Informational | July 2013 |
| 7035 | Relative Location RepresentationM. Thomson, B. Rosen, D. Stanley, G. Bajko, A. Thomson | Proposed Standard | October 2013 |
| 7090 | Public Safety Answering Point (PSAP) CallbackH. Schulzrinne, H. Tschofenig, C. Holmberg, M. Patel | Proposed Standard | April 2014 |
| 7303 | XML Media TypesH. Thompson, C. Lilley | Proposed Standard | July 2014 |
| 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 |
| 7841 | RFC Streams, Headers, and BoilerplatesJ. Halpern, Ed., L. Daigle, Ed., O. Kolkman, Ed. | Informational | May 2016 |