| 9878 | Updates to Private Header (P-Header) Extension Usage in Session Initiation Protocol (SIP) Requests and ResponsesC. Holmberg, N. Biondic, G. Salgueiro, R. Jesske | Informational | November 2025 |
| 9806 | Updates to SIP-Based Media Recording (SIPREC) to Correct Metadata Media TypeD. Mongrain | Proposed Standard | June 2025 |
| 9796 | SIP Call-Info Parameters for Rich Call DataC. Wendt, J. Peterson | Proposed Standard | July 2025 |
| 9366 | Multiple SIP Reason Header Field ValuesR. Sparks | Proposed Standard | March 2023 |
| 8898 | Third-Party Token-Based Authentication and Authorization for Session Initiation Protocol (SIP)R. Shekh-Yusef, C. Holmberg, V. Pascual | Proposed Standard | September 2020 |
| 8787 | Location Source Parameter for the SIP Geolocation Header FieldJ. Winterbottom, R. Jesske, B. Chatras, A. Hutton | Proposed Standard | May 2020 |
| 8760 | The Session Initiation Protocol (SIP) Digest Access Authentication SchemeR. Shekh-Yusef | Proposed Standard | March 2020 |
| 8688 | A Session Initiation Protocol (SIP) Response Code for Rejected CallsE.W. Burger, B. Nagda | Proposed Standard | December 2019 |
| 8606 | ISDN User Part (ISUP) Cause Location Parameter for the SIP Reason Header FieldR. Jesske | Proposed Standard | June 2019 |
| 8599 | Push Notification with the Session Initiation Protocol (SIP)C. Holmberg, M. Arnold | Proposed Standard | May 2019 |
| 8498 | A P-Served-User Header Field Parameter for an Originating Call Diversion (CDIV) Session Case in the Session Initiation Protocol (SIP)M. Mohali | Informational | February 2019 |
| 8262 | Content-ID Header Field in the Session Initiation Protocol (SIP)C. Holmberg, I. Sedlacek | Proposed Standard | October 2017 |
| 8217 | Clarifications for When to Use the name-addr Production in SIP MessagesR. Sparks | Proposed Standard | August 2017 |
| 8197 | A SIP Response Code for Unwanted CallsH. Schulzrinne | Proposed Standard | July 2017 |
| 7984 | Locating Session Initiation Protocol (SIP) Servers in a Dual-Stack IP NetworkO. Johansson, G. Salgueiro, V. Gurbani, D. Worley, Ed. | Proposed Standard | September 2016 |
| 7647 | Clarifications for the Use of REFER with RFC 6665R. Sparks, A.B. Roach | Proposed Standard | September 2015 |
| 7621 | A Clarification on the Use of Globally Routable User Agent URIs (GRUUs) in the SIP Event Notification FrameworkA.B. Roach | Proposed Standard | August 2015 |
| 7614 | Explicit Subscriptions for the REFER MethodR. Sparks | Proposed Standard | August 2015 |
| 7134 | The Management Policy of the Resource Priority Header (RPH) Registry Changed to "IETF Review"B. Rosen | Proposed Standard | March 2014 |
| 7131 | Session Initiation Protocol (SIP) History-Info Header Call Flow ExamplesM. Barnes, F. Audet, S. Schubert, H. van Elburg, C. Holmberg | Informational | March 2014 |
| 7118 | The WebSocket Protocol as a Transport for the Session Initiation Protocol (SIP)I. Baz Castillo, J. Millan Villegas, V. Pascual | Proposed Standard | January 2014 |
| 7044 | An Extension to the Session Initiation Protocol (SIP) for Request History InformationM. Barnes, F. Audet, S. Schubert, J. van Elburg, C. Holmberg | Proposed Standard | February 2014 |
| 6878 | IANA Registry for the Session Initiation Protocol (SIP) "Priority" Header FieldA.B. Roach | Proposed Standard | March 2013 |
| 6809 | Mechanism to Indicate Support of Features and Capabilities in the Session Initiation Protocol (SIP)C. Holmberg, I. Sedlacek, H. Kaplan | Proposed Standard | November 2012 |
| 6665 | SIP-Specific Event NotificationA.B. Roach | Proposed Standard | July 2012 |
| 6446 | Session Initiation Protocol (SIP) Event Notification Extension for Notification Rate ControlA. Niemi, K. Kiss, S. Loreto | Proposed Standard | January 2012 |
| 6442 | Location Conveyance for the Session Initiation ProtocolJ. Polk, B. Rosen, J. Peterson | Proposed Standard | December 2011 |
| 6228 | Session Initiation Protocol (SIP) Response Code for Indication of Terminated DialogC. Holmberg | Proposed Standard | May 2011 |
| 6223 | Indication of Support for Keep-AliveC. Holmberg | Proposed Standard | April 2011 |
| 6216 | Example Call Flows Using Session Initiation Protocol (SIP) Security MechanismsC. Jennings, K. Ono, R. Sparks, B. Hibbard, Ed. | Informational | April 2011 |
| 6141 | Re-INVITE and Target-Refresh Request Handling in the Session Initiation Protocol (SIP)G. Camarillo, Ed., C. Holmberg, Y. Gao | Proposed Standard | March 2011 |
| 6086 | Session Initiation Protocol (SIP) INFO Method and Package FrameworkC. Holmberg, E. Burger, H. Kaplan | Proposed Standard | January 2011 |
| 6026 | Correct Transaction Handling for 2xx Responses to Session Initiation Protocol (SIP) INVITE RequestsR. Sparks, T. Zourzouvillys | Proposed Standard | September 2010 |
| 5839 | An Extension to Session Initiation Protocol (SIP) Events for Conditional Event NotificationA. Niemi, D. Willis, Ed. | Proposed Standard | May 2010 |