| 821 | Simple Mail Transfer ProtocolJ. Postel · obsoleted by RFC 2821 | Internet Standard | August 1982 |
| 822 | STANDARD FOR THE FORMAT OF ARPA INTERNET TEXT MESSAGESD. Crocker · obsoleted by RFC 2822 | Internet Standard | August 1982 |
| 904 | Exterior Gateway Protocol formal specificationD.L. Mills | Historic | April 1984 |
| 974 | Mail routing and the domain systemC. Partridge · obsoleted by RFC 2821 | Historic | January 1986 |
| 1700 | Assigned NumbersJ. Reynolds, J. Postel · obsoleted by RFC 3232 | Historic | October 1994 |
| 1812 | Requirements for IP Version 4 RoutersF. Baker, Ed. | Proposed Standard | June 1995 |
| 1869 | SMTP Service ExtensionsJ. Klensin, N. Freed, M. Rose, E. Stefferud, D. Crocker · obsoleted by RFC 2821 | Internet Standard | November 1995 |
| 2026 | The Internet Standards Process -- Revision 3S. Bradner | Best Current Practice | October 1996 |
| 2418 | IETF Working Group Guidelines and ProceduresS. Bradner | Best Current Practice | September 1998 |
| 2821 | Simple Mail Transfer ProtocolJ. Klensin, Ed. · obsoleted by RFC 5321 | Proposed Standard | April 2001 |
| 2822 | Internet Message FormatP. Resnick, Ed. · obsoleted by RFC 5322 | Proposed Standard | April 2001 |
| 3095 | RObust Header Compression (ROHC): Framework and four profiles: RTP, UDP, ESP, and uncompressedC. Bormann, C. Burmeister, M. Degermark, H. Fukushima, H. Hannu, L-E. Jonsson, R. Hakenberg, T. Koren, K. Le, Z. Liu, A. Martensson, A. Miyazaki, K. Svanbro, T. Wiebke, T. Yoshimura, H. Zheng | Proposed Standard | July 2001 |
| 3232 | Assigned Numbers: RFC 1700 is Replaced by an On-line DatabaseJ. Reynolds, Ed. | Informational | January 2002 |
| 3638 | Applicability Statement for Reclassification of RFC 1643 to Historic StatusJ. Flick, C. M. Heard | Informational | October 2003 |
| 3700 | Internet Official Protocol StandardsJ. Reynolds, Ed., S. Ginoza, Ed. · obsoleted by RFC 5000 | Historic | July 2004 |
| 3978 | IETF Rights in ContributionsS. Bradner, Ed. · obsoleted by RFC 5378 | Best Current Practice | March 2005 |
| 3979 | Intellectual Property Rights in IETF TechnologyS. Bradner, Ed. · obsoleted by RFC 8179 | Best Current Practice | March 2005 |
| 4181 | Guidelines for Authors and Reviewers of MIB DocumentsC. Heard, Ed. | Best Current Practice | September 2005 |