| 8866 | SDP: Session Description ProtocolA. Begen, P. Kyzivat, C. Perkins, M. Handley | Proposed Standard | January 2021 |
| 6498 | Media Gateway Control Protocol (MGCP) Voiceband Data (VBD) Package and General-Purpose Media Descriptor Parameter PackageJ. Stone, R. Kumar, F. Andreasen | Informational | March 2012 |
| 6466 | IANA Registration of the 'image' Media Type for the Session Description Protocol (SDP)G. Salgueiro | Proposed Standard | December 2011 |
| 5630 | The Use of the SIPS URI Scheme in the Session Initiation Protocol (SIP)F. Audet | Proposed Standard | October 2009 |
| 5109 | RTP Payload Format for Generic Forward Error CorrectionA. Li, Ed. | Proposed Standard | December 2007 |
| 4867 | RTP Payload Format and File Storage Format for the Adaptive Multi-Rate (AMR) and Adaptive Multi-Rate Wideband (AMR-WB) Audio CodecsJ. Sjoberg, M. Westerlund, A. Lakaniemi, Q. Xie | Proposed Standard | April 2007 |
| 4612 | Real-Time Facsimile (T.38) - audio/t38 MIME Sub-type RegistrationP. Jones, H. Tamura | Historic | August 2006 |
| 4598 | Real-time Transport Protocol (RTP) Payload Format for Enhanced AC-3 (E-AC-3) AudioB. Link | Proposed Standard | July 2006 |
| 4588 | RTP Retransmission Payload FormatJ. Rey, D. Leon, A. Miyazaki, V. Varsa, R. Hakenberg | Proposed Standard | July 2006 |
| 4574 | The Session Description Protocol (SDP) Label AttributeO. Levin, G. Camarillo | Proposed Standard | 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 |
| 4542 | Implementing an Emergency Telecommunications Service (ETS) for Real-Time Services in the Internet Protocol SuiteF. Baker, J. Polk | Informational | May 2006 |
| 4497 | Interworking between the Session Initiation Protocol (SIP) and QSIGJ. Elwell, F. Derks, P. Mourot, O. Rousseau | Best Current Practice | May 2006 |
| 4473 | Requirements for Internet Media Guides (IMGs)Y. Nomura, R. Walsh, J-P. Luoma, J. Ott, H. Schulzrinne | Informational | May 2006 |
| 4463 | A Media Resource Control Protocol (MRCP) Developed by Cisco, Nuance, and SpeechworksS. Shanmugham, P. Monaco, B. Eberman | Informational | April 2006 |
| 4442 | Bootstrapping Timed Efficient Stream Loss-Tolerant Authentication (TESLA)S. Fries, H. Tschofenig | Proposed Standard | March 2006 |
| 4435 | A Framework for the Usage of Internet Media Guides (IMGs)Y. Nomura, R. Walsh, J-P. Luoma, H. Asaeda, H. Schulzrinne | Informational | April 2006 |
| 4425 | RTP Payload Format for Video Codec 1 (VC-1)A. Klemets | Proposed Standard | February 2006 |
| 4396 | RTP Payload Format for 3rd Generation Partnership Project (3GPP) Timed TextJ. Rey, Y. Matsui | Proposed Standard | February 2006 |
| 4352 | RTP Payload Format for the Extended Adaptive Multi-Rate Wideband (AMR-WB+) Audio CodecJ. Sjoberg, M. Westerlund, A. Lakaniemi, S. Wenger | Proposed Standard | January 2006 |
| 4351 | Real-Time Transport Protocol (RTP) Payload for Text Conversation Interleaved in an Audio StreamG. Hellstrom, P. Jones | Historic | January 2006 |
| 4348 | Real-Time Transport Protocol (RTP) Payload Format for the Variable-Rate Multimode Wideband (VMR-WB) Audio CodecS. Ahmadi | Proposed Standard | January 2006 |
| 4317 | Session Description Protocol (SDP) Offer/Answer ExamplesA. Johnston, R. Sparks | Informational | December 2005 |
| 4298 | RTP Payload Format for BroadVoice Speech CodecsJ.-H. Chen, W. Lee, J. Thyssen | Proposed Standard | December 2005 |
| 4215 | Analysis on IPv6 Transition in Third Generation Partnership Project (3GPP) NetworksJ. Wiljakka, Ed. | Informational | October 2005 |
| 4189 | Requirements for End-to-Middle Security for the Session Initiation Protocol (SIP)K. Ono, S. Tachimoto | Informational | October 2005 |
| 4184 | RTP Payload Format for AC-3 AudioB. Link, T. Hager, J. Flaks | Proposed Standard | October 2005 |
| 4175 | RTP Payload Format for Uncompressed VideoL. Gharai, C. Perkins | Proposed Standard | September 2005 |
| 4145 | TCP-Based Media Transport in the Session Description Protocol (SDP)D. Yon, G. Camarillo | Proposed Standard | September 2005 |
| 4123 | Session Initiation Protocol (SIP)-H.323 Interworking RequirementsH. Schulzrinne, C. Agboh | Informational | July 2005 |
| 4103 | RTP Payload for Text ConversationG. Hellstrom, P. Jones | Proposed Standard | June 2005 |
| 4102 | Registration of the text/red MIME Sub-TypeP. Jones | Proposed Standard | June 2005 |
| 4101 | Writing Protocol ModelsE. Rescorla, IAB | Informational | 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 |
| 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 |
| 4060 | RTP Payload Formats for European Telecommunications Standards Institute (ETSI) European Standard ES 202 050, ES 202 211, and ES 202 212 Distributed Speech Recognition EncodingQ. Xie, D. Pearce | Proposed Standard | May 2005 |
| 4046 | Multicast Security (MSEC) Group Key Management ArchitectureM. Baugher, R. Canetti, L. Dondeti, F. Lindholm | Informational | May 2005 |
| 4040 | RTP Payload Format for a 64 kbit/s Transparent CallR. Kreuter | Proposed Standard | April 2005 |
| 3984 | RTP Payload Format for H.264 VideoS. Wenger, M.M. Hannuksela, T. Stockhammer, M. Westerlund, D. Singer · obsoleted by RFC 6184 | Proposed Standard | February 2005 |
| 3959 | The Early Session Disposition Type for the Session Initiation Protocol (SIP)G. Camarillo | Proposed Standard | December 2004 |
| 3952 | Real-time Transport Protocol (RTP) Payload Format for internet Low Bit Rate Codec (iLBC) SpeechA. Duric, S. Andersen | Experimental | December 2004 |
| 3940 | Negative-acknowledgment (NACK)-Oriented Reliable Multicast (NORM) ProtocolB. Adamson, C. Bormann, M. Handley, J. Macker · obsoleted by RFC 5740 | Experimental | November 2004 |
| 3926 | FLUTE - File Delivery over Unidirectional TransportT. Paila, M. Luby, R. Lehtonen, V. Roca, R. Walsh · obsoleted by RFC 6726 | Experimental | October 2004 |
| 3924 | Cisco Architecture for Lawful Intercept in IP NetworksF. Baker, B. Foster, C. Sharp | Informational | November 2004 |
| 3890 | A Transport Independent Bandwidth Modifier for the Session Description Protocol (SDP)M. Westerlund | Proposed Standard | September 2004 |
| 3840 | Indicating User Agent Capabilities in the Session Initiation Protocol (SIP)J. Rosenberg, H. Schulzrinne, P. Kyzivat | Proposed Standard | August 2004 |
| 3830 | MIKEY: Multimedia Internet KEYingJ. Arkko, E. Carrara, F. Lindholm, M. Naslund, K. Norrman | Proposed Standard | August 2004 |
| 3824 | Using E.164 numbers with the Session Initiation Protocol (SIP)J. Peterson, H. Liu, J. Yu, B. Campbell | Informational | June 2004 |
| 3794 | Survey of IPv4 Addresses in Currently Deployed IETF Transport Area Standards Track and Experimental DocumentsP. Nesser, II, A. Bergstrom, Ed. | Informational | June 2004 |
| 3764 | enumservice registration for Session Initiation Protocol (SIP) Addresses-of-RecordJ. Peterson | Proposed Standard | April 2004 |
| 3661 | Media Gateway Control Protocol (MGCP) Return Code UsageB. Foster, C. Sivachelvan | Informational | December 2003 |
| 3660 | Basic Media Gateway Control Protocol (MGCP) PackagesB. Foster, F. Andreasen | Informational | December 2003 |
| 3640 | RTP Payload Format for Transport of MPEG-4 Elementary StreamsJ. van der Meer, D. Mackie, V. Swaminathan, D. Singer, P. Gentric | Proposed Standard | December 2003 |
| 3611 | RTP Control Protocol Extended Reports (RTCP XR)T. Friedman, Ed., R. Caceres, Ed., A. Clark, Ed. | Proposed Standard | November 2003 |
| 3605 | Real Time Control Protocol (RTCP) attribute in Session Description Protocol (SDP)C. Huitema | Proposed Standard | October 2003 |
| 3558 | RTP Payload Format for Enhanced Variable Rate Codecs (EVRC) and Selectable Mode Vocoders (SMV)A. Li | Proposed Standard | July 2003 |
| 3557 | RTP Payload Format for European Telecommunications Standards Institute (ETSI) European Standard ES 201 108 Distributed Speech Recognition EncodingQ. Xie, Ed. | Proposed Standard | July 2003 |
| 3556 | Session Description Protocol (SDP) Bandwidth Modifiers for RTP Control Protocol (RTCP) BandwidthS. Casner | Proposed Standard | July 2003 |
| 3555 | MIME Type Registration of RTP Payload FormatsS. Casner, P. Hoschka · obsoleted by RFC 4855, RFC 4856 | Proposed Standard | July 2003 |
| 3551 | RTP Profile for Audio and Video Conferences with Minimal ControlH. Schulzrinne, S. Casner | Internet Standard | July 2003 |
| 3550 | RTP: A Transport Protocol for Real-Time ApplicationsH. Schulzrinne, S. Casner, R. Frederick, V. Jacobson | Internet Standard | July 2003 |
| 3525 | Gateway Control Protocol Version 1C. Groves, Ed., M. Pantaleo, Ed., T. Anderson, Ed., T. Taylor, Ed. · obsoleted by RFC 5125 | Historic | June 2003 |
| 3524 | Mapping of Media Streams to Resource Reservation FlowsG. Camarillo, A. Monrad | Proposed Standard | April 2003 |
| 3521 | Framework for Session Set-up with Media AuthorizationL-N. Hamer, B. Gage, H. Shieh | Informational | April 2003 |
| 3520 | Session Authorization Policy ElementL-N. Hamer, B. Gage, B. Kosinski, H. Shieh | Proposed Standard | April 2003 |
| 3497 | RTP Payload Format for Society of Motion Picture and Television Engineers (SMPTE) 292M VideoL. Gharai, C. Perkins, G. Goncher, A. Mankin | Proposed Standard | March 2003 |
| 3451 | Layered Coding Transport (LCT) Building BlockM. Luby, J. Gemmell, L. Vicisano, L. Rizzo, M. Handley, J. Crowcroft · obsoleted by RFC 5651 | Experimental | December 2002 |
| 3450 | Asynchronous Layered Coding (ALC) Protocol InstantiationM. Luby, J. Gemmell, L. Vicisano, L. Rizzo, J. Crowcroft · obsoleted by RFC 5775 | Experimental | December 2002 |
| 3441 | Asynchronous Transfer Mode (ATM) Package for the Media Gateway Control Protocol (MGCP)R. Kumar | Informational | January 2003 |
| 3435 | Media Gateway Control Protocol (MGCP) Version 1.0F. Andreasen, B. Foster | Informational | January 2003 |
| 3389 | Real-time Transport Protocol (RTP) Payload for Comfort Noise (CN)R. Zopf | Proposed Standard | October 2002 |
| 3388 | Grouping of Media Lines in the Session Description Protocol (SDP)G. Camarillo, G. Eriksson, J. Holler, H. Schulzrinne · obsoleted by RFC 5888 | Proposed Standard | December 2002 |
| 3372 | Session Initiation Protocol for Telephones (SIP-T): Context and ArchitecturesA. Vemuri, J. Peterson | Best Current Practice | September 2002 |
| 3362 | Real-time Facsimile (T.38) - image/t38 MIME Sub-type RegistrationG. Parsons | Proposed Standard | September 2002 |
| 3323 | A Privacy Mechanism for the Session Initiation Protocol (SIP)J. Peterson | Proposed Standard | December 2002 |
| 3322 | Signaling Compression (SigComp) Requirements & AssumptionsH. Hannu | Informational | January 2003 |
| 3313 | Private Session Initiation Protocol (SIP) Extensions for Media AuthorizationW. Marshall, Ed. | Informational | January 2003 |
| 3312 | Integration of Resource Management and Session Initiation Protocol (SIP)G. Camarillo, Ed., W. Marshall, Ed., J. Rosenberg | Proposed Standard | October 2002 |
| 3303 | Middlebox communication architecture and frameworkP. Srisuresh, J. Kuthan, J. Rosenberg, A. Molitor, A. Rayhan | Informational | August 2002 |
| 3298 | Service in the Public Switched Telephone Network/Intelligent Network (PSTN/IN) Requesting InTernet Service (SPIRITS) Protocol RequirementsI. Faynberg, J. Gato, H. Lu, L. Slutsman | Informational | September 2002 |
| 3267 | Real-Time Transport Protocol (RTP) Payload Format and File Storage Format for the Adaptive Multi-Rate (AMR) and Adaptive Multi-Rate Wideband (AMR-WB) Audio CodecsJ. Sjoberg, M. Westerlund, A. Lakaniemi, Q. Xie · obsoleted by RFC 4867 | Proposed Standard | July 2002 |
| 3266 | Support for IPv6 in Session Description Protocol (SDP)S. Olson, G. Camarillo, A. B. Roach · obsoleted by RFC 4566 | Proposed Standard | July 2002 |
| 3264 | An Offer/Answer Model with Session Description Protocol (SDP)J. Rosenberg, H. Schulzrinne | Proposed Standard | July 2002 |
| 3261 | SIP: Session Initiation ProtocolJ. Rosenberg, H. Schulzrinne, G. Camarillo, A. Johnston, J. Peterson, R. Sparks, M. Handley, E. Schooler | Proposed Standard | July 2002 |
| 3259 | A Message Bus for Local CoordinationJ. Ott, C. Perkins, D. Kutscher | Informational | May 2002 |
| 3199 | Request for Comments Summary RFC Numbers 3100-3199S. Ginoza | Informational | February 2003 |
| 3190 | RTP Payload Format for 12-bit DAT Audio and 20- and 24-bit Linear Sampled AudioK. Kobayashi, A. Ogawa, S. Casner, C. Bormann | Proposed Standard | January 2002 |
| 3189 | RTP Payload Format for DV (IEC 61834) VideoK. Kobayashi, A. Ogawa, S. Casner, C. Bormann · obsoleted by RFC 6469 | Proposed Standard | January 2002 |
| 3170 | IP Multicast Applications: Challenges and SolutionsB. Quinn, K. Almeroth | Informational | September 2001 |
| 3119 | A More Loss-Tolerant RTP Payload Format for MP3 AudioR. Finlayson · obsoleted by RFC 5219 | Proposed Standard | June 2001 |
| 3108 | Conventions for the use of the Session Description Protocol (SDP) for ATM Bearer ConnectionsR. Kumar, M. Mostafa | Proposed Standard | May 2001 |
| 3064 | MGCP CAS PackagesB. Foster | Informational | February 2001 |
| 3048 | Reliable Multicast Transport Building Blocks for One-to-Many Bulk-Data TransferB. Whetten, L. Vicisano, R. Kermode, M. Handley, S. Floyd, M. Luby | Informational | January 2001 |
| 3047 | RTP Payload Format for ITU-T Recommendation G.722.1P. Luthi · obsoleted by RFC 5577 | Proposed Standard | January 2001 |
| 3027 | Protocol Complications with the IP Network Address TranslatorM. Holdrege, P. Srisuresh | Informational | January 2001 |
| 3016 | RTP Payload Format for MPEG-4 Audio/Visual StreamsY. Kikuchi, T. Nomura, S. Fukunaga, Y. Matsui, H. Kimata · obsoleted by RFC 6416 | Proposed Standard | November 2000 |
| 3015 | Megaco Protocol Version 1.0F. Cuervo, N. Greene, A. Rayhan, C. Huitema, B. Rosen, J. Segers · obsoleted by RFC 3525 | Proposed Standard | November 2000 |
| 3009 | Registration of parityfec MIME typesJ. Rosenberg, H. Schulzrinne · obsoleted by RFC 5109 | Proposed Standard | November 2000 |
| 2974 | Session Announcement ProtocolM. Handley, C. Perkins, E. Whelan | Experimental | October 2000 |
| 2885 | Megaco Protocol version 0.8F. Cuervo, N. Greene, C. Huitema, A. Rayhan, B. Rosen, J. Segers · obsoleted by RFC 3015 | Historic | August 2000 |
| 2848 | The PINT Service Protocol: Extensions to SIP and SDP for IP Access to Telephone Call ServicesS. Petrack, L. Conroy | Proposed Standard | June 2000 |
| 2833 | RTP Payload for DTMF Digits, Telephony Tones and Telephony SignalsH. Schulzrinne, S. Petrack · obsoleted by RFC 4733, RFC 4734 | Proposed Standard | May 2000 |
| 2771 | An Abstract API for Multicast Address AllocationR. Finlayson | Informational | February 2000 |
| 2733 | An RTP Payload Format for Generic Forward Error CorrectionJ. Rosenberg, H. Schulzrinne · obsoleted by RFC 5109 | Proposed Standard | December 1999 |
| 2705 | Media Gateway Control Protocol (MGCP) Version 1.0M. Arango, A. Dugan, I. Elliott, C. Huitema, S. Pickett · obsoleted by RFC 3435 | Informational | October 1999 |
| 2588 | IP Multicast and FirewallsR. Finlayson | Informational | May 1999 |
| 2543 | SIP: Session Initiation ProtocolM. Handley, H. Schulzrinne, E. Schooler, J. Rosenberg · obsoleted by RFC 3261, RFC 3262, RFC 3263, RFC 3264, RFC 3265 | Proposed Standard | March 1999 |
| 2361 | WAVE and AVI Codec RegistriesE. Fleischman | Informational | June 1998 |
| 2326 | Real Time Streaming Protocol (RTSP)H. Schulzrinne, A. Rao, R. Lanphier · obsoleted by RFC 7826 | Proposed Standard | April 1998 |