| 2119 | Key words for use in RFCs to Indicate Requirement LevelsS. Bradner | Best Current Practice | March 1997 |
| 2871 | A Framework for Telephony Routing over IPJ. Rosenberg, H. Schulzrinne | Informational | June 2000 |
| 3261 | SIP: Session Initiation ProtocolJ. Rosenberg, H. Schulzrinne, G. Camarillo, A. Johnston, J. Peterson, R. Sparks, M. Handley, E. Schooler | Proposed Standard | July 2002 |
| 3605 | Real Time Control Protocol (RTCP) attribute in Session Description Protocol (SDP)C. Huitema | Proposed Standard | October 2003 |
| 4091 | The Alternative Network Address Types (ANAT) Semantics for the Session Description Protocol (SDP) Grouping FrameworkG. Camarillo, J. Rosenberg · obsoleted by RFC 5245 | Proposed Standard | June 2005 |
| 4092 | Usage of the Session Description Protocol (SDP) Alternative Network Address Types (ANAT) Semantics in the Session Initiation Protocol (SIP)G. Camarillo, J. Rosenberg · obsoleted by RFC 5245 | Proposed Standard | June 2005 |
| 4566 | SDP: Session Description ProtocolM. Handley, V. Jacobson, C. Perkins · obsoleted by RFC 8866 | Proposed Standard | July 2006 |
| 5234 | Augmented BNF for Syntax Specifications: ABNFD. Crocker, Ed., P. Overell | Internet Standard | January 2008 |
| 5245 | Interactive Connectivity Establishment (ICE): A Protocol for Network Address Translator (NAT) Traversal for Offer/Answer ProtocolsJ. Rosenberg · obsoleted by RFC 8445, RFC 8839 | Proposed Standard | April 2010 |
| 5741 | RFC Streams, Headers, and BoilerplatesL. Daigle, Ed., O. Kolkman, Ed., IAB · obsoleted by RFC 7841 | Informational | December 2009 |
| 5761 | Multiplexing RTP Data and Control Packets on a Single PortC. Perkins, M. Westerlund | Proposed Standard | April 2010 |
| 5853 | Requirements from Session Initiation Protocol (SIP) Session Border Control (SBC) DeploymentsJ. Hautakorpi, Ed., G. Camarillo, R. Penfield, A. Hawrylyshen, M. Bhatia | Informational | April 2010 |
| 5939 | Session Description Protocol (SDP) Capability NegotiationF. Andreasen | Proposed Standard | September 2010 |
| 6146 | Stateful NAT64: Network Address and Protocol Translation from IPv6 Clients to IPv4 ServersM. Bagnulo, P. Matthews, I. van Beijnum | Proposed Standard | April 2011 |
| 6157 | IPv6 Transition in the Session Initiation Protocol (SIP)G. Camarillo, K. El Malki, V. Gurbani | Proposed Standard | April 2011 |
| 6333 | Dual-Stack Lite Broadband Deployments Following IPv4 ExhaustionA. Durand, R. Droms, J. Woodyatt, Y. Lee | Proposed Standard | August 2011 |
| 6406 | Session PEERing for Multimedia INTerconnect (SPEERMINT) ArchitectureD. Malas, Ed., J. Livingood, Ed. | Informational | November 2011 |
| 6888 | Common Requirements for Carrier-Grade NATs (CGNs)S. Perreault, Ed., I. Yamagata, S. Miyakawa, A. Nakagawa, H. Ashida | Best Current Practice | April 2013 |