| 9475 | Messaging Use Cases and Extensions for Secure Telephone Identity Revisited (STIR)J. Peterson, C. Wendt | Proposed Standard | December 2023 |
| 8876 | Non-interactive Emergency CallsB. Rosen, H. Schulzrinne, H. Tschofenig, R. Gellens | Proposed Standard | September 2020 |
| 8591 | SIP-Based Messaging with S/MIMEB. Campbell, R. Housley | Proposed Standard | April 2019 |
| 7573 | Interworking between the Session Initiation Protocol (SIP) and the Extensible Messaging and Presence Protocol (XMPP): One-to-One Text Chat SessionsP. Saint-Andre, S. Loreto | Proposed Standard | June 2015 |
| 7572 | Interworking between the Session Initiation Protocol (SIP) and the Extensible Messaging and Presence Protocol (XMPP): Instant MessagingP. Saint-Andre, A. Houri, J. Hildebrand | Proposed Standard | June 2015 |
| 7247 | Interworking between the Session Initiation Protocol (SIP) and the Extensible Messaging and Presence Protocol (XMPP): Architecture, Addresses, and Error HandlingP. Saint-Andre, A. Houri, J. Hildebrand | Proposed Standard | May 2014 |
| 6914 | SIMPLE Made Simple: An Overview of the IETF Specifications for Instant Messaging and Presence Using the Session Initiation Protocol (SIP)J. Rosenberg | Informational | April 2013 |
| 6881 | Best Current Practice for Communications Services in Support of Emergency CallingB. Rosen, J. Polk | Best Current Practice | March 2013 |
| 6794 | A Framework for Session Initiation Protocol (SIP) Session PoliciesV. Hilt, G. Camarillo, J. Rosenberg | Proposed Standard | December 2012 |
| 6468 | Sieve Notification Mechanism: SIP MESSAGEA. Melnikov, B. Leiba, K. Li | Proposed Standard | February 2012 |
| 6443 | Framework for Emergency Calling Using Internet MultimediaB. Rosen, H. Schulzrinne, J. Polk, A. Newton | Informational | December 2011 |
| 6442 | Location Conveyance for the Session Initiation ProtocolJ. Polk, B. Rosen, J. Peterson | Proposed Standard | December 2011 |
| 6216 | Example Call Flows Using Session Initiation Protocol (SIP) Security MechanismsC. Jennings, K. Ono, R. Sparks, B. Hibbard, Ed. | Informational | April 2011 |
| 6086 | Session Initiation Protocol (SIP) INFO Method and Package FrameworkC. Holmberg, E. Burger, H. Kaplan | Proposed Standard | January 2011 |
| 6050 | A Session Initiation Protocol (SIP) Extension for the Identification of ServicesK. Drage | Informational | November 2010 |
| 5897 | Identification of Communications Services in the Session Initiation Protocol (SIP)J. Rosenberg | Informational | June 2010 |
| 5876 | Updates to Asserted Identity in the Session Initiation Protocol (SIP)J. Elwell | Informational | April 2010 |
| 5638 | Simple SIP Usage Scenario for Applications in the EndpointsH. Sinnreich, Ed., A. Johnston, E. Shim, K. Singh | Informational | September 2009 |
| 5631 | Session Initiation Protocol (SIP) Session MobilityR. Shacham, H. Schulzrinne, S. Thakolsri, W. Kellerer | Informational | October 2009 |
| 5621 | Message Body Handling in the Session Initiation Protocol (SIP)G. Camarillo | Proposed Standard | September 2009 |
| 5514 | IPv6 over Social NetworksE. Vyncke | Experimental | 1 April 2009 |
| 5509 | Internet Assigned Numbers Authority (IANA) Registration of Instant Messaging and Presence DNS SRV RRs for the Session Initiation Protocol (SIP)S. Loreto | Proposed Standard | April 2009 |
| 5438 | Instant Message Disposition Notification (IMDN)E. Burger, H. Khartabil | Proposed Standard | February 2009 |
| 5411 | A Hitchhiker's Guide to the Session Initiation Protocol (SIP)J. Rosenberg | Informational | February 2009 |
| 5365 | Multiple-Recipient MESSAGE Requests in the Session Initiation Protocol (SIP)M. Garcia-Martin, G. Camarillo | Proposed Standard | October 2008 |
| 5360 | A Framework for Consent-Based Communications in the Session Initiation Protocol (SIP)J. Rosenberg, G. Camarillo, Ed., D. Willis | Proposed Standard | October 2008 |
| 5359 | Session Initiation Protocol Service ExamplesA. Johnston, Ed., R. Sparks, C. Cunningham, S. Donovan, K. Summers | Best Current Practice | October 2008 |
| 5344 | Presence and Instant Messaging Peering Use CasesA. Houri, E. Aoki, S. Parameswar | Informational | October 2008 |
| 5039 | The Session Initiation Protocol (SIP) and SpamJ. Rosenberg, C. Jennings | Informational | January 2008 |
| 4975 | The Message Session Relay Protocol (MSRP)B. Campbell, Ed., R. Mahy, Ed., C. Jennings, Ed. | Proposed Standard | September 2007 |
| 4964 | The P-Answer-State Header Extension to the Session Initiation Protocol for the Open Mobile Alliance Push to Talk over CellularA. Allen, Ed., J. Holm, T. Hallin | Informational | September 2007 |
| 4907 | Architectural Implications of Link IndicationsB. Aboba, Ed. | Informational | June 2007 |
| 4538 | Request Authorization through Dialog Identification in the Session Initiation Protocol (SIP)J. Rosenberg | Proposed Standard | June 2006 |
| 4504 | SIP Telephony Device Requirements and ConfigurationH. Sinnreich, Ed., S. Lass, C. Stredicke | Informational | May 2006 |
| 4453 | Requirements for Consent-Based Communications in the Session Initiation Protocol (SIP)J. Rosenberg, G. Camarillo, Ed., D. Willis | Informational | April 2006 |
| 4412 | Communications Resource Priority for the Session Initiation Protocol (SIP)H. Schulzrinne, J. Polk | Proposed Standard | February 2006 |
| 4189 | Requirements for End-to-Middle Security for the Session Initiation Protocol (SIP)K. Ono, S. Tachimoto | Informational | October 2005 |
| 3911 | The Session Initiation Protocol (SIP) "Join" HeaderR. Mahy, D. Petrie | Proposed Standard | October 2004 |
| 3891 | The Session Initiation Protocol (SIP) "Replaces" HeaderR. Mahy, B. Biggs, R. Dean | Proposed Standard | September 2004 |
| 3841 | Caller Preferences for the Session Initiation Protocol (SIP)J. Rosenberg, H. Schulzrinne, P. Kyzivat | Proposed Standard | August 2004 |
| 3840 | Indicating User Agent Capabilities in the Session Initiation Protocol (SIP)J. Rosenberg, H. Schulzrinne, P. Kyzivat | Proposed Standard | August 2004 |
| 3680 | A Session Initiation Protocol (SIP) Event Package for RegistrationsJ. Rosenberg | Proposed Standard | March 2004 |
| 3485 | The Session Initiation Protocol (SIP) and Session Description Protocol (SDP) Static Dictionary for Signaling Compression (SigComp)M. Garcia-Martin, C. Bormann, J. Ott, R. Price, A. B. Roach | Proposed Standard | March 2003 |
| 3455 | Private Header (P-Header) Extensions to the Session Initiation Protocol (SIP) for the 3rd-Generation Partnership Project (3GPP)M. Garcia-Martin, E. Henrikson, D. Mills · obsoleted by RFC 7315 | Informational | January 2003 |