| 1738 | Uniform Resource Locators (URL)T. Berners-Lee, L. Masinter, M. McCahill · obsoleted by RFC 4248, RFC 4266 | Proposed Standard | December 1994 |
| 2045 | Multipurpose Internet Mail Extensions (MIME) Part One: Format of Internet Message BodiesN. Freed, N. Borenstein | Draft Standard | November 1996 |
| 2119 | Key words for use in RFCs to Indicate Requirement LevelsS. Bradner | Best Current Practice | March 1997 |
| 2222 | Simple Authentication and Security Layer (SASL)J. Myers · obsoleted by RFC 4422, RFC 4752 | Proposed Standard | October 1997 |
| 2277 | IETF Policy on Character Sets and LanguagesH. Alvestrand | Best Current Practice | January 1998 |
| 2278 | IANA Charset Registration ProceduresN. Freed, J. Postel · obsoleted by RFC 2978 | Informational | January 1998 |
| 2396 | Uniform Resource Identifiers (URI): Generic SyntaxT. Berners-Lee, R. Fielding, L. Masinter · obsoleted by RFC 3986 | Draft Standard | August 1998 |
| 2445 | Internet Calendaring and Scheduling Core Object Specification (iCalendar)F. Dawson, D. Stenerson · obsoleted by RFC 5545 | Proposed Standard | November 1998 |
| 2446 | iCalendar Transport-Independent Interoperability Protocol (iTIP) Scheduling Events, BusyTime, To-dos and Journal EntriesS. Silverberg, S. Mansour, F. Dawson, R. Hopson · obsoleted by RFC 5546 | Proposed Standard | November 1998 |
| 2447 | iCalendar Message-Based Interoperability Protocol (iMIP)F. Dawson, S. Mansour, S. Silverberg · obsoleted by RFC 6047 | Proposed Standard | November 1998 |
| 2459 | Internet X.509 Public Key Infrastructure Certificate and CRL ProfileR. Housley, W. Ford, W. Polk, D. Solo · obsoleted by RFC 3280 | Proposed Standard | January 1999 |
| 2718 | Guidelines for new URL SchemesL. Masinter, H. Alvestrand, D. Zigmond, R. Petke · obsoleted by RFC 4395 | Informational | November 1999 |
| 2822 | Internet Message FormatP. Resnick, Ed. · obsoleted by RFC 5322 | Proposed Standard | April 2001 |
| 3080 | The Blocks Extensible Exchange Protocol CoreM. Rose | Proposed Standard | March 2001 |
| 3081 | Mapping the BEEP Core onto TCPM. Rose | Proposed Standard | March 2001 |
| 3280 | Internet X.509 Public Key Infrastructure Certificate and Certificate Revocation List (CRL) ProfileR. Housley, W. Polk, W. Ford, D. Solo · obsoleted by RFC 5280 | Proposed Standard | May 2002 |
| 3283 | Guide to Internet CalendaringB. Mahoney, G. Babics, A. Taler | Informational | July 2002 |
| 3986 | Uniform Resource Identifier (URI): Generic SyntaxT. Berners-Lee, R. Fielding, L. Masinter | Internet Standard | January 2005 |
| 4234 | Augmented BNF for Syntax Specifications: ABNFD. Crocker, Ed., P. Overell · obsoleted by RFC 5234 | Draft Standard | October 2005 |