| 9248 | Interoperability Profile for Relay User EquipmentB. Rosen | Proposed Standard | June 2022 |
| 8866 | SDP: Session Description ProtocolA. Begen, P. Kyzivat, C. Perkins, M. Handley | Proposed Standard | January 2021 |
| 8848 | Session Signaling for Controlling Multiple Streams for Telepresence (CLUE)R. Hanton, P. Kyzivat, L. Xiao, C. Groves | Experimental | January 2021 |
| 8840 | A Session Initiation Protocol (SIP) Usage for Incremental Provisioning of Candidates for the Interactive Connectivity Establishment (Trickle ICE)E. Ivov, T. Stach, E. Marocco, C. Holmberg | Proposed Standard | January 2021 |
| 8599 | Push Notification with the Session Initiation Protocol (SIP)C. Holmberg, M. Arnold | Proposed Standard | May 2019 |
| 8591 | SIP-Based Messaging with S/MIMEB. Campbell, R. Housley | Proposed Standard | April 2019 |
| 7904 | A SIP Usage for REsource LOcation And Discovery (RELOAD)C. Jennings, B. Lowekamp, E. Rescorla, S. Baset, H. Schulzrinne, T. Schmidt, Ed. | Proposed Standard | October 2016 |
| 7866 | Session Recording ProtocolL. Portman, H. Lum, Ed., C. Eckel, A. Johnston, A. Hutton | Proposed Standard | May 2016 |
| 7865 | Session Initiation Protocol (SIP) Recording MetadataR. Ravindranath, P. Ravindran, P. Kyzivat | Proposed Standard | May 2016 |
| 7852 | Additional Data Related to an Emergency CallR. Gellens, B. Rosen, H. Tschofenig, R. Marshall, J. Winterbottom | Proposed Standard | July 2016 |
| 7701 | Multi-party Chat Using the Message Session Relay Protocol (MSRP)A. Niemi, M. Garcia-Martin, G. Sandbakken | Proposed Standard | December 2015 |
| 7614 | Explicit Subscriptions for the REFER MethodR. Sparks | Proposed Standard | August 2015 |
| 7463 | Shared Appearances of a Session Initiation Protocol (SIP) Address of Record (AOR)A. Johnston, Ed., M. Soroushnejad, Ed., V. Venkataramanan | Proposed Standard | March 2015 |
| 7434 | Interworking ISDN Call Control User Information with SIPK. Drage, Ed., A. Johnston | Proposed Standard | January 2015 |
| 7433 | A Mechanism for Transporting User-to-User Call Control Information in SIPA. Johnston, J. Rafferty | Proposed Standard | January 2015 |
| 7082 | Indication of Conference Focus Support for the Centralized Conferencing Manipulation Protocol (CCMP)R. Shekh-Yusef, M. Barnes | Informational | December 2013 |
| 6913 | Indicating Fax over IP Capability in the Session Initiation Protocol (SIP)D. Hanes, G. Salgueiro, K. Fleming | 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 |
| 6230 | Media Control Channel FrameworkC. Boulton, T. Melanchuk, S. McGlashan | Proposed Standard | May 2011 |
| 6228 | Session Initiation Protocol (SIP) Response Code for Indication of Terminated DialogC. Holmberg | Proposed Standard | May 2011 |
| 6140 | Registration for Multiple Phone Numbers in the Session Initiation Protocol (SIP)A.B. Roach | Proposed Standard | March 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 |
| 5850 | A Call Control and Multi-Party Usage Framework for the Session Initiation Protocol (SIP)R. Mahy, R. Sparks, J. Rosenberg, D. Petrie, A. Johnston, Ed. | Informational | May 2010 |
| 5768 | Indicating Support for Interactive Connectivity Establishment (ICE) in the Session Initiation Protocol (SIP)J. Rosenberg | Proposed Standard | April 2010 |
| 5707 | Media Server Markup Language (MSML)A. Saleem, Y. Xin, G. Sharratt | Informational | February 2010 |
| 5688 | A Session Initiation Protocol (SIP) Media Feature Tag for MIME Application SubtypesJ. Rosenberg | Proposed Standard | January 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 |
| 5629 | A Framework for Application Interaction in the Session Initiation Protocol (SIP)J. Rosenberg | Proposed Standard | October 2009 |
| 5627 | Obtaining and Using Globally Routable User Agent URIs (GRUUs) in the Session Initiation Protocol (SIP)J. Rosenberg | Proposed Standard | October 2009 |
| 5626 | Managing Client-Initiated Connections in the Session Initiation Protocol (SIP)C. Jennings, Ed., R. Mahy, Ed., F. Audet, Ed. | Proposed Standard | October 2009 |
| 5567 | An Architectural Framework for Media Server ControlT. Melanchuk, Ed. | Informational | June 2009 |
| 5411 | A Hitchhiker's Guide to the Session Initiation Protocol (SIP)J. Rosenberg | Informational | February 2009 |
| 5373 | Requesting Answering Modes for the Session Initiation Protocol (SIP)D. Willis, Ed., A. Allen | Proposed Standard | November 2008 |
| 5359 | Session Initiation Protocol Service ExamplesA. Johnston, Ed., R. Sparks, C. Cunningham, S. Donovan, K. Summers | Best Current Practice | October 2008 |
| 5196 | Session Initiation Protocol (SIP) User Agent Capability Extension to Presence Information Data Format (PIDF)M. Lonnfors, K. Kiss | Proposed Standard | September 2008 |
| 5194 | Framework for Real-Time Text over IP Using the Session Initiation Protocol (SIP)A. van Wijk, Ed., G. Gybels, Ed. | Informational | June 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 |
| 4596 | Guidelines for Usage of the Session Initiation Protocol (SIP) Caller Preferences ExtensionJ. Rosenberg, P. Kyzivat | Informational | July 2006 |
| 4579 | Session Initiation Protocol (SIP) Call Control - Conferencing for User AgentsA. Johnston, O. Levin | Best Current Practice | August 2006 |
| 4569 | Internet Assigned Number Authority (IANA) Registration of the Message Media Feature TagG. Camarillo | Informational | July 2006 |
| 4566 | SDP: Session Description ProtocolM. Handley, V. Jacobson, C. Perkins · obsoleted by RFC 8866 | Proposed Standard | July 2006 |
| 4508 | Conveying Feature Tags with the Session Initiation Protocol (SIP) REFER MethodO. Levin, A. Johnston | Proposed Standard | May 2006 |
| 4504 | SIP Telephony Device Requirements and ConfigurationH. Sinnreich, Ed., S. Lass, C. Stredicke | Informational | May 2006 |
| 4483 | A Mechanism for Content Indirection in Session Initiation Protocol (SIP) MessagesE. Burger, Ed. | Proposed Standard | May 2006 |
| 4479 | A Data Model for PresenceJ. Rosenberg | Proposed Standard | July 2006 |
| 4353 | A Framework for Conferencing with the Session Initiation Protocol (SIP)J. Rosenberg | Informational | February 2006 |
| 4235 | An INVITE-Initiated Dialog Event Package for the Session Initiation Protocol (SIP)J. Rosenberg, H. Schulzrinne, R. Mahy, Ed. | Proposed Standard | November 2005 |
| 3911 | The Session Initiation Protocol (SIP) "Join" HeaderR. Mahy, D. Petrie | Proposed Standard | October 2004 |
| 3903 | Session Initiation Protocol (SIP) Extension for Event State PublicationA. Niemi, Ed. | Proposed Standard | November 2004 |
| 3856 | A Presence Event Package for the Session Initiation Protocol (SIP)J. Rosenberg | Proposed Standard | August 2004 |
| 3842 | A Message Summary and Message Waiting Indication Event Package for the Session Initiation Protocol (SIP)R. Mahy | Proposed Standard | August 2004 |
| 3841 | Caller Preferences for the Session Initiation Protocol (SIP)J. Rosenberg, H. Schulzrinne, P. Kyzivat | Proposed Standard | August 2004 |