| 9694 | Guidelines for the Definition of New Top-Level Media TypesM.J. Dürst | Best Current Practice | March 2025 |
| 6838 | Media Type Specifications and Registration ProceduresN. Freed, J. Klensin, T. Hansen | Best Current Practice | January 2013 |
| 5228 | Sieve: An Email Filtering LanguageP. Guenther, Ed., T. Showalter, Ed. | Proposed Standard | January 2008 |
| 4501 | Domain Name System Uniform Resource IdentifiersS. Josefsson | Proposed Standard | May 2006 |
| 4416 | Goals for Internet Messaging to Support Diverse Service EnvironmentsJ. Wong, Ed. | Informational | February 2006 |
| 4289 | Multipurpose Internet Mail Extensions (MIME) Part Four: Registration ProceduresN. Freed, J. Klensin | Best Current Practice | December 2005 |
| 4288 | Media Type Specifications and Registration ProceduresN. Freed, J. Klensin · obsoleted by RFC 6838 | Best Current Practice | December 2005 |
| 4240 | Basic Network Media Services with SIPE. Burger, Ed., J. Van Dyke, A. Spitzer | Informational | December 2005 |
| 4180 | Common Format and MIME Type for Comma-Separated Values (CSV) FilesY. Shafranovich | Informational | October 2005 |
| 4155 | The application/mbox Media TypeE. Hall | Informational | September 2005 |
| 4145 | TCP-Based Media Transport in the Session Description Protocol (SDP)D. Yon, G. Camarillo | Proposed Standard | September 2005 |
| 4047 | MIME Sub-type Registrations for Flexible Image Transport System (FITS)S. Allen, D. Wells | Informational | April 2005 |
| 4040 | RTP Payload Format for a 64 kbit/s Transparent CallR. Kreuter | Proposed Standard | April 2005 |
| 4027 | Domain Name System Media TypesS. Josefsson | Informational | May 2005 |
| 3926 | FLUTE - File Delivery over Unidirectional TransportT. Paila, M. Luby, R. Lehtonen, V. Roca, R. Walsh · obsoleted by RFC 6726 | Experimental | October 2004 |
| 3910 | The SPIRITS (Services in PSTN requesting Internet Services) ProtocolV. Gurbani, Ed., A. Brusilovsky, I. Faynberg, J. Gato, H. Lu, M. Unmehopa | Proposed Standard | October 2004 |
| 3870 | application/rdf+xml Media Type RegistrationA. Swartz | Informational | September 2004 |
| 3863 | Presence Information Data Format (PIDF)H. Sugano, S. Fujimoto, G. Klyne, A. Bateman, W. Carr, J. Peterson | Proposed Standard | August 2004 |
| 3862 | Common Presence and Instant Messaging (CPIM): Message FormatG. Klyne, D. Atkins | Proposed Standard | August 2004 |
| 3851 | Secure/Multipurpose Internet Mail Extensions (S/MIME) Version 3.1 Message SpecificationB. Ramsdell, Ed. · obsoleted by RFC 5751 | Proposed Standard | July 2004 |
| 3823 | MIME Media Type for the Systems Biology Markup Language (SBML)B. Kovitz | Informational | June 2004 |
| 3801 | Voice Profile for Internet Mail - version 2 (VPIMv2)G. Vaudreuil, G. Parsons | Draft Standard | June 2004 |
| 3778 | The application/pdf Media TypeE. Taft, J. Pravetz, S. Zilles, L. Masinter · obsoleted by RFC 8118 | Informational | May 2004 |
| 3712 | Lightweight Directory Access Protocol (LDAP): Schema for Printer ServicesP. Fleming, I. McDonald · obsoleted by RFC 7612 | Informational | February 2004 |
| 3640 | RTP Payload Format for Transport of MPEG-4 Elementary StreamsJ. van der Meer, D. Mackie, V. Swaminathan, D. Singer, P. Gentric | Proposed Standard | December 2003 |
| 3555 | MIME Type Registration of RTP Payload FormatsS. Casner, P. Hoschka · obsoleted by RFC 4855, RFC 4856 | Proposed Standard | July 2003 |
| 3551 | RTP Profile for Audio and Video Conferences with Minimal ControlH. Schulzrinne, S. Casner | Internet Standard | July 2003 |
| 3405 | Dynamic Delegation Discovery System (DDDS) Part Five: URI.ARPA Assignment ProceduresM. Mealling | Best Current Practice | October 2002 |
| 3362 | Real-time Facsimile (T.38) - image/t38 MIME Sub-type RegistrationG. Parsons | Proposed Standard | September 2002 |
| 3302 | Tag Image File Format (TIFF) - image/tiff MIME Sub-type RegistrationG. Parsons, J. Rafferty | Draft Standard | September 2002 |
| 3299 | Request for Comments Summary RFC Numbers 3200-3299S. Ginoza | Informational | December 2003 |
| 3282 | Content Language HeadersH. Alvestrand | Draft Standard | May 2002 |
| 3250 | Tag Image File Format Fax eXtended (TIFF-FX) - image/tiff-fx MIME Sub-type RegistrationL. McIntyre, G. Parsons, J. Rafferty · obsoleted by RFC 3950 | Proposed Standard | September 2002 |
| 3204 | MIME media types for ISUP and QSIG ObjectsE. Zimmerer, J. Peterson, A. Vemuri, L. Ong, F. Audet, M. Watson, M. Zonoun | Proposed Standard | December 2001 |
| 3028 | Sieve: A Mail Filtering LanguageT. Showalter · obsoleted by RFC 5228, RFC 5429 | Proposed Standard | January 2001 |
| 3023 | XML Media TypesM. Murata, S. St. Laurent, D. Kohn · obsoleted by RFC 7303 | Proposed Standard | January 2001 |
| 3009 | Registration of parityfec MIME typesJ. Rosenberg, H. Schulzrinne · obsoleted by RFC 5109 | Proposed Standard | November 2000 |
| 2936 | HTTP MIME Type Handler DetectionD. Eastlake 3rd, C. Smith, D. Soroka | Informational | September 2000 |
| 2935 | Internet Open Trading Protocol (IOTP) HTTP SupplementD. Eastlake 3rd, C. Smith | Proposed Standard | September 2000 |
| 2911 | Internet Printing Protocol/1.1: Model and SemanticsT. Hastings, Ed., R. Herriot, R. deBry, S. Isaacson, P. Powell · obsoleted by RFC 8011 | Proposed Standard | September 2000 |
| 2910 | Internet Printing Protocol/1.1: Encoding and TransportR. Herriot, Ed., S. Butler, P. Moore, R. Turner, J. Wenn · obsoleted by RFC 8010 | Proposed Standard | September 2000 |
| 2848 | The PINT Service Protocol: Extensions to SIP and SDP for IP Access to Telephone Call ServicesS. Petrack, L. Conroy | Proposed Standard | June 2000 |
| 2822 | Internet Message FormatP. Resnick, Ed. · obsoleted by RFC 5322 | Proposed Standard | April 2001 |
| 2806 | URLs for Telephone CallsA. Vaha-Sipila · obsoleted by RFC 3966 | Proposed Standard | April 2000 |
| 2801 | Internet Open Trading Protocol - IOTP Version 1.0D. Burdett | Informational | April 2000 |
| 2652 | MIME Object Definitions for the Common Indexing Protocol (CIP)J. Allen, M. Mealling | Proposed Standard | August 1999 |
| 2633 | S/MIME Version 3 Message SpecificationB. Ramsdell, Ed. · obsoleted by RFC 3851 | Proposed Standard | June 1999 |
| 2566 | Internet Printing Protocol/1.0: Model and SemanticsR. deBry, T. Hastings, R. Herriot, S. Isaacson, P. Powell · obsoleted by RFC 2911 | Experimental | April 1999 |
| 2565 | Internet Printing Protocol/1.0: Encoding and TransportR. Herriot, Ed., S. Butler, P. Moore, R. Turner · obsoleted by RFC 2910 | Experimental | April 1999 |
| 2557 | MIME Encapsulation of Aggregate Documents, such as HTML (MHTML)J. Palme, A. Hopmann, N. Shelness | Proposed Standard | March 1999 |
| 2506 | Media Feature Tag Registration ProcedureK. Holtman, A. Mutz, T. Hardie | Best Current Practice | March 1999 |
| 2447 | iCalendar Message-Based Interoperability Protocol (iMIP)F. Dawson, S. Mansour, S. Silverberg · obsoleted by RFC 6047 | Proposed Standard | November 1998 |
| 2445 | Internet Calendaring and Scheduling Core Object Specification (iCalendar)F. Dawson, D. Stenerson · obsoleted by RFC 5545 | 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 |
| 2426 | vCard MIME Directory ProfileF. Dawson, T. Howes · obsoleted by RFC 6350 | Proposed Standard | September 1998 |
| 2425 | A MIME Content-Type for Directory InformationT. Howes, M. Smith, F. Dawson · obsoleted by RFC 6350 | Proposed Standard | September 1998 |
| 2423 | VPIM Voice Message MIME Sub-type RegistrationG. Vaudreuil, G. Parsons · obsoleted by RFC 3801 | Proposed Standard | September 1998 |
| 2422 | Toll Quality Voice - 32 kbit/s ADPCM MIME Sub-type RegistrationG. Vaudreuil, G. Parsons · obsoleted by RFC 3802 | Proposed Standard | September 1998 |
| 2421 | Voice Profile for Internet Mail - version 2G. Vaudreuil, G. Parsons · obsoleted by RFC 3801 | Proposed Standard | September 1998 |
| 2327 | SDP: Session Description ProtocolM. Handley, V. Jacobson · obsoleted by RFC 4566 | Proposed Standard | April 1998 |
| 2311 | S/MIME Version 2 Message SpecificationS. Dusse, P. Hoffman, B. Ramsdell, L. Lundblade, L. Repka | Historic | March 1998 |
| 2306 | Tag Image File Format (TIFF) - F Profile for FacsimileG. Parsons, J. Rafferty | Informational | March 1998 |
| 2302 | Tag Image File Format (TIFF) - image/tiff MIME Sub-type RegistrationG. Parsons, J. Rafferty, S. Zilles · obsoleted by RFC 3302 | Proposed Standard | March 1998 |
| 2279 | UTF-8, a transformation format of ISO 10646F. Yergeau · obsoleted by RFC 3629 | Draft Standard | January 1998 |
| 2278 | IANA Charset Registration ProceduresN. Freed, J. Postel · obsoleted by RFC 2978 | Informational | January 1998 |
| 2237 | Japanese Character Encoding for Internet MessagesK. Tamaru | Informational | November 1997 |
| 2231 | MIME Parameter Value and Encoded Word Extensions: Character Sets, Languages, and ContinuationsN. Freed, K. Moore | Proposed Standard | November 1997 |
| 2199 | Request for Comments Summary RFC Numbers 2100-2199A. Ramos | Informational | January 1998 |
| 2184 | MIME Parameter Value and Encoded Word Extensions: Character Sets, Languages, and ContinuationsN. Freed, K. Moore · obsoleted by RFC 2231 | Proposed Standard | August 1997 |
| 2183 | Communicating Presentation Information in Internet Messages: The Content-Disposition Header FieldR. Troost, S. Dorner, K. Moore, Ed. | Proposed Standard | August 1997 |
| 2122 | VEMMI URL SpecificationD. Mavrakis, H. Layec, K. Kartmann | Proposed Standard | March 1997 |
| 2099 | Request for Comments Summary RFC Numbers 2000-2099J. Elliott | Informational | March 1997 |
| 2083 | PNG (Portable Network Graphics) Specification Version 1.0T. Boutell | Historic | March 1997 |
| 2068 | Hypertext Transfer Protocol -- HTTP/1.1R. Fielding, J. Gettys, J. Mogul, H. Frystyk, T. Berners-Lee · obsoleted by RFC 2616 | Proposed Standard | January 1997 |
| 2049 | Multipurpose Internet Mail Extensions (MIME) Part Five: Conformance Criteria and ExamplesN. Freed, N. Borenstein | Draft Standard | November 1996 |
| 2047 | MIME (Multipurpose Internet Mail Extensions) Part Three: Message Header Extensions for Non-ASCII TextK. Moore | Draft Standard | November 1996 |
| 2046 | Multipurpose Internet Mail Extensions (MIME) Part Two: Media TypesN. Freed, N. Borenstein | Draft Standard | November 1996 |
| 2045 | Multipurpose Internet Mail Extensions (MIME) Part One: Format of Internet Message BodiesN. Freed, N. Borenstein | Draft Standard | November 1996 |