| 1034 | Domain names - concepts and facilitiesP. Mockapetris | Internet Standard | November 1987 |
| 1191 | Path MTU discoveryJ. Mogul, S. Deering | Draft Standard | November 1990 |
| 1321 | The MD5 Message-Digest AlgorithmR. Rivest | Informational | April 1992 |
| 1661 | The Point-to-Point Protocol (PPP)W. Simpson, Ed. | Internet Standard | July 1994 |
| 1700 | Assigned NumbersJ. Reynolds, J. Postel · obsoleted by RFC 3232 | Historic | October 1994 |
| 1750 | Randomness Recommendations for SecurityD. Eastlake 3rd, S. Crocker, J. Schiller · obsoleted by RFC 4086 | Informational | December 1994 |
| 1958 | Architectural Principles of the InternetB. Carpenter, Ed. | Informational | June 1996 |
| 1981 | Path MTU Discovery for IP version 6J. McCann, S. Deering, J. Mogul · obsoleted by RFC 8201 | Draft Standard | August 1996 |
| 2072 | Router Renumbering GuideH. Berkowitz | Informational | January 1997 |
| 2104 | HMAC: Keyed-Hashing for Message AuthenticationH. Krawczyk, M. Bellare, R. Canetti | Informational | February 1997 |
| 2119 | Key words for use in RFCs to Indicate Requirement LevelsS. Bradner | Best Current Practice | March 1997 |
| 2277 | IETF Policy on Character Sets and LanguagesH. Alvestrand | Best Current Practice | January 1998 |
| 2341 | Cisco Layer Two Forwarding (Protocol) "L2F"A. Valencia, M. Littlewood, T. Kolar | Historic | May 1998 |
| 2401 | Security Architecture for the Internet ProtocolS. Kent, R. Atkinson · obsoleted by RFC 4301 | Proposed Standard | November 1998 |
| 2434 | Guidelines for Writing an IANA Considerations Section in RFCsT. Narten, H. Alvestrand · obsoleted by RFC 5226 | Best Current Practice | October 1998 |
| 2473 | Generic Packet Tunneling in IPv6 SpecificationA. Conta, S. Deering | Proposed Standard | December 1998 |
| 2581 | TCP Congestion ControlM. Allman, V. Paxson, W. Stevens · obsoleted by RFC 5681 | Proposed Standard | April 1999 |
| 2637 | Point-to-Point Tunneling Protocol (PPTP)K. Hamzeh, G. Pall, W. Verthein, J. Taarud, W. Little, G. Zorn | Informational | July 1999 |
| 2661 | Layer Two Tunneling Protocol "L2TP"W. Townsley, A. Valencia, A. Rubens, G. Pall, G. Zorn, B. Palter | Proposed Standard | August 1999 |
| 2732 | Format for Literal IPv6 Addresses in URL'sR. Hinden, B. Carpenter, L. Masinter · obsoleted by RFC 3986 | Proposed Standard | December 1999 |
| 2809 | Implementation of L2TP Compulsory Tunneling via RADIUSB. Aboba, G. Zorn | Informational | April 2000 |
| 2865 | Remote Authentication Dial In User Service (RADIUS)C. Rigney, S. Willens, A. Rubens, W. Simpson | Draft Standard | June 2000 |
| 2890 | Key and Sequence Number Extensions to GREG. Dommety | Proposed Standard | September 2000 |
| 3066 | Tags for the Identification of LanguagesH. Alvestrand · obsoleted by RFC 4646, RFC 4647 | Best Current Practice | January 2001 |
| 3070 | Layer Two Tunneling Protocol (L2TP) over Frame RelayV. Rawat, R. Tio, S. Nanji, R. Verma | Proposed Standard | February 2001 |
| 3193 | Securing L2TP using IPsecB. Patel, B. Aboba, W. Dixon, G. Zorn, S. Booth | Proposed Standard | November 2001 |
| 3355 | Layer Two Tunnelling Protocol (L2TP) Over ATM Adaptation Layer 5 (AAL5)A. Singh, R. Turner, R. Tio, S. Nanji | Proposed Standard | September 2002 |
| 3438 | Layer Two Tunneling Protocol (L2TP) Internet Assigned Numbers Authority (IANA) Considerations UpdateW. Townsley | Best Current Practice | December 2002 |
| 3629 | UTF-8, a transformation format of ISO 10646F. Yergeau | Internet Standard | November 2003 |