| 792 | Internet Control Message ProtocolJ. Postel | Internet Standard | September 1981 |
| 1738 | Uniform Resource Locators (URL)T. Berners-Lee, L. Masinter, M. McCahill · obsoleted by RFC 4248, RFC 4266 | Proposed Standard | December 1994 |
| 2119 | Key words for use in RFCs to Indicate Requirement LevelsS. Bradner | Best Current Practice | March 1997 |
| 2198 | RTP Payload for Redundant Audio DataC. Perkins, I. Kouvelas, O. Hodson, V. Hardman, M. Handley, J.C. Bolot, A. Vega-Garcia, S. Fosse-Parisis | Proposed Standard | September 1997 |
| 2205 | Resource ReSerVation Protocol (RSVP) -- Version 1 Functional SpecificationR. Braden, Ed., L. Zhang, S. Berson, S. Herzog, S. Jamin | Proposed Standard | September 1997 |
| 2279 | UTF-8, a transformation format of ISO 10646F. Yergeau · obsoleted by RFC 3629 | Draft Standard | January 1998 |
| 2326 | Real Time Streaming Protocol (RTSP)H. Schulzrinne, A. Rao, R. Lanphier · obsoleted by RFC 7826 | Proposed Standard | April 1998 |
| 2327 | SDP: Session Description ProtocolM. Handley, V. Jacobson · obsoleted by RFC 4566 | Proposed Standard | April 1998 |
| 2396 | Uniform Resource Identifiers (URI): Generic SyntaxT. Berners-Lee, R. Fielding, L. Masinter · obsoleted by RFC 3986 | Draft Standard | August 1998 |
| 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 |
| 2833 | RTP Payload for DTMF Digits, Telephony Tones and Telephony SignalsH. Schulzrinne, S. Petrack · obsoleted by RFC 4733, RFC 4734 | Proposed Standard | May 2000 |
| 3064 | MGCP CAS PackagesB. Foster | Informational | February 2001 |
| 3435 | Media Gateway Control Protocol (MGCP) Version 1.0F. Andreasen, B. Foster | Informational | January 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 |
| 3551 | RTP Profile for Audio and Video Conferences with Minimal ControlH. Schulzrinne, S. Casner | Internet Standard | July 2003 |