| 1112 | Host extensions for IP multicastingS.E. Deering | Internet Standard | August 1989 |
| 2119 | Key words for use in RFCs to Indicate Requirement LevelsS. Bradner | Best Current Practice | March 1997 |
| 2762 | Sampling of the Group Membership in RTPJ. Rosenberg, H. Schulzrinne | Experimental | February 2000 |
| 2974 | Session Announcement ProtocolM. Handley, C. Perkins, E. Whelan | Experimental | October 2000 |
| 3168 | The Addition of Explicit Congestion Notification (ECN) to IPK. Ramakrishnan, S. Floyd, D. Black | Proposed Standard | September 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 |
| 3264 | An Offer/Answer Model with Session Description Protocol (SDP)J. Rosenberg, H. Schulzrinne | Proposed Standard | July 2002 |
| 3540 | Robust Explicit Congestion Notification (ECN) Signaling with NoncesN. Spring, D. Wetherall, D. Ely | Historic | June 2003 |
| 3550 | RTP: A Transport Protocol for Real-Time ApplicationsH. Schulzrinne, S. Casner, R. Frederick, V. Jacobson | Internet Standard | July 2003 |
| 3551 | RTP Profile for Audio and Video Conferences with Minimal ControlH. Schulzrinne, S. Casner | Internet Standard | July 2003 |
| 3569 | An Overview of Source-Specific Multicast (SSM)S. Bhattacharyya, Ed. | Informational | July 2003 |
| 3611 | RTP Control Protocol Extended Reports (RTCP XR)T. Friedman, Ed., R. Caceres, Ed., A. Clark, Ed. | Proposed Standard | November 2003 |
| 3629 | UTF-8, a transformation format of ISO 10646F. Yergeau | Internet Standard | November 2003 |
| 3711 | The Secure Real-time Transport Protocol (SRTP)M. Baugher, D. McGrew, M. Naslund, E. Carrara, K. Norrman | Proposed Standard | March 2004 |
| 4301 | Security Architecture for the Internet ProtocolS. Kent, K. Seo | Proposed Standard | December 2005 |
| 4340 | Datagram Congestion Control Protocol (DCCP)E. Kohler, M. Handley, S. Floyd | Proposed Standard | March 2006 |
| 4566 | SDP: Session Description ProtocolM. Handley, V. Jacobson, C. Perkins · obsoleted by RFC 8866 | Proposed Standard | July 2006 |
| 4585 | Extended RTP Profile for Real-time Transport Control Protocol (RTCP)-Based Feedback (RTP/AVPF)J. Ott, S. Wenger, N. Sato, C. Burmeister, J. Rey | Proposed Standard | July 2006 |
| 4588 | RTP Retransmission Payload FormatJ. Rey, D. Leon, A. Miyazaki, V. Varsa, R. Hakenberg | Proposed Standard | July 2006 |
| 4607 | Source-Specific Multicast for IPH. Holbrook, B. Cain | Proposed Standard | August 2006 |
| 4960 | Stream Control Transmission ProtocolR. Stewart, Ed. · obsoleted by RFC 9260 | Proposed Standard | September 2007 |
| 5117 | RTP TopologiesM. Westerlund, S. Wenger · obsoleted by RFC 7667 | Informational | January 2008 |
| 5124 | Extended Secure RTP Profile for Real-time Transport Control Protocol (RTCP)-Based Feedback (RTP/SAVPF)J. Ott, E. Carrara | Proposed Standard | February 2008 |
| 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 |
| 5348 | TCP Friendly Rate Control (TFRC): Protocol SpecificationS. Floyd, M. Handley, J. Padhye, J. Widmer | Proposed Standard | September 2008 |
| 5389 | Session Traversal Utilities for NAT (STUN)J. Rosenberg, R. Mahy, P. Matthews, D. Wing · obsoleted by RFC 8489 | Proposed Standard | October 2008 |
| 5506 | Support for Reduced-Size Real-Time Transport Control Protocol (RTCP): Opportunities and ConsequencesI. Johansson, M. Westerlund | Proposed Standard | April 2009 |
| 5630 | The Use of the SIPS URI Scheme in the Session Initiation Protocol (SIP)F. Audet | Proposed Standard | October 2009 |
| 5741 | RFC Streams, Headers, and BoilerplatesL. Daigle, Ed., O. Kolkman, Ed., IAB · obsoleted by RFC 7841 | Informational | December 2009 |
| 5751 | Secure/Multipurpose Internet Mail Extensions (S/MIME) Version 3.2 Message SpecificationB. Ramsdell, S. Turner · obsoleted by RFC 8551 | Proposed Standard | January 2010 |
| 5760 | RTP Control Protocol (RTCP) Extensions for Single-Source Multicast Sessions with Unicast FeedbackJ. Ott, J. Chesterfield, E. Schooler | Proposed Standard | February 2010 |
| 6189 | ZRTP: Media Path Key Agreement for Unicast Secure RTPP. Zimmermann, A. Johnston, Ed., J. Callas | Informational | April 2011 |
| 6336 | IANA Registry for Interactive Connectivity Establishment (ICE) OptionsM. Westerlund, C. Perkins · obsoleted by RFC 8839 | Proposed Standard | July 2011 |
| 6347 | Datagram Transport Layer Security Version 1.2E. Rescorla, N. Modadugu · obsoleted by RFC 9147 | Proposed Standard | January 2012 |