| 821 | Simple Mail Transfer ProtocolJ. Postel · obsoleted by RFC 2821 | Internet Standard | August 1982 |
| 952 | DoD Internet host table specificationK. Harrenstien, M.K. Stahl, E.J. Feinler | Unknown | October 1985 |
| 1001 | Protocol standard for a NetBIOS service on a TCP/UDP transport: Concepts and methodsNetBIOS Working Group in the Defense Advanced Research Projects Agency, Internet Activities Board, End-to-End Services Task Force | Internet Standard | March 1987 |
| 1002 | Protocol standard for a NetBIOS service on a TCP/UDP transport: Detailed specificationsNetBIOS Working Group in the Defense Advanced Research Projects Agency, Internet Activities Board, End-to-End Services Task Force | Internet Standard | March 1987 |
| 1034 | Domain names - concepts and facilitiesP. Mockapetris | Internet Standard | November 1987 |
| 1123 | Requirements for Internet Hosts - Application and SupportR. Braden, Ed. | Internet Standard | October 1989 |
| 1468 | Japanese Character Encoding for Internet MessagesJ. Murai, M. Crispin, E. van der Poel | Informational | June 1993 |
| 1535 | A Security Problem and Proposed Correction With Widely Deployed DNS SoftwareE. Gavron | Informational | October 1993 |
| 1536 | Common DNS Implementation Errors and Suggested FixesA. Kumar, J. Postel, C. Neuman, P. Danzig, S. Miller | Informational | October 1993 |
| 2130 | The Report of the IAB Character Set Workshop held 29 February - 1 March, 1996C. Weider, C. Preston, K. Simonsen, H. Alvestrand, R. Atkinson, M. Crispin, P. Svanberg | Informational | April 1997 |
| 2136 | Dynamic Updates in the Domain Name System (DNS UPDATE)P. Vixie, Ed., S. Thomson, Y. Rekhter, J. Bound | Proposed Standard | April 1997 |
| 2181 | Clarifications to the DNS SpecificationR. Elz, R. Bush | Proposed Standard | July 1997 |
| 2277 | IETF Policy on Character Sets and LanguagesH. Alvestrand | Best Current Practice | January 1998 |
| 3397 | Dynamic Host Configuration Protocol (DHCP) Domain Search OptionB. Aboba, S. Cheshire | Proposed Standard | November 2002 |
| 3490 | Internationalizing Domain Names in Applications (IDNA)P. Faltstrom, P. Hoffman, A. Costello · obsoleted by RFC 5890, RFC 5891 | Proposed Standard | March 2003 |
| 3492 | Punycode: A Bootstring encoding of Unicode for Internationalized Domain Names in Applications (IDNA)A. Costello | Proposed Standard | March 2003 |
| 3493 | Basic Socket Interface Extensions for IPv6R. Gilligan, S. Thomson, J. Bound, J. McCann, W. Stevens | Informational | March 2003 |
| 3629 | UTF-8, a transformation format of ISO 10646F. Yergeau | Internet Standard | November 2003 |
| 3646 | DNS Configuration options for Dynamic Host Configuration Protocol for IPv6 (DHCPv6)R. Droms, Ed. | Proposed Standard | December 2003 |
| 4343 | Domain Name System (DNS) Case Insensitivity ClarificationD. Eastlake 3rd | Proposed Standard | January 2006 |
| 4690 | Review and Recommendations for Internationalized Domain Names (IDNs)J. Klensin, P. Faltstrom, C. Karp, IAB | Informational | September 2006 |
| 4795 | Link-local Multicast Name Resolution (LLMNR)B. Aboba, D. Thaler, L. Esibov | Informational | January 2007 |
| 4952 | Overview and Framework for Internationalized EmailJ. Klensin, Y. Ko · obsoleted by RFC 6530 | Informational | July 2007 |
| 5198 | Unicode Format for Network InterchangeJ. Klensin, M. Padlipsky | Proposed Standard | March 2008 |
| 5321 | Simple Mail Transfer ProtocolJ. Klensin | Draft Standard | October 2008 |
| 5731 | Extensible Provisioning Protocol (EPP) Domain Name MappingS. Hollenbeck | Internet Standard | August 2009 |
| 5741 | RFC Streams, Headers, and BoilerplatesL. Daigle, Ed., O. Kolkman, Ed., IAB · obsoleted by RFC 7841 | Informational | December 2009 |
| 5890 | Internationalized Domain Names for Applications (IDNA): Definitions and Document FrameworkJ. Klensin | Proposed Standard | August 2010 |
| 5891 | Internationalized Domain Names in Applications (IDNA): ProtocolJ. Klensin | Proposed Standard | August 2010 |