| 1510 | The Kerberos Network Authentication Service (V5)J. Kohl, C. Neuman · obsoleted by RFC 4120, RFC 6649 | Historic | September 1993 |
| 1738 | Uniform Resource Locators (URL)T. Berners-Lee, L. Masinter, M. McCahill · obsoleted by RFC 4248, RFC 4266 | Proposed Standard | December 1994 |
| 2026 | The Internet Standards Process -- Revision 3S. Bradner | Best Current Practice | October 1996 |
| 2119 | Key words for use in RFCs to Indicate Requirement LevelsS. Bradner | Best Current Practice | March 1997 |
| 2251 | Lightweight Directory Access Protocol (v3)M. Wahl, T. Howes, S. Kille · obsoleted by RFC 4510, RFC 4511, RFC 4512, RFC 4513 | Proposed Standard | December 1997 |
| 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 |
| 2560 | X.509 Internet Public Key Infrastructure Online Certificate Status Protocol - OCSPM. Myers, R. Ankney, A. Malpani, S. Galperin, C. Adams · obsoleted by RFC 6960 | Proposed Standard | June 1999 |
| 2585 | Internet X.509 Public Key Infrastructure Operational Protocols: FTP and HTTPR. Housley, P. Hoffman | Proposed Standard | May 1999 |
| 2630 | Cryptographic Message SyntaxR. Housley · obsoleted by RFC 3369, RFC 3370 | Proposed Standard | June 1999 |
| 3279 | Algorithms and Identifiers for the Internet X.509 Public Key Infrastructure Certificate and Certificate Revocation List (CRL) ProfileL. Bassham, W. Polk, R. Housley | Proposed Standard | May 2002 |
| 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 |
| 3281 | An Internet Attribute Certificate Profile for AuthorizationS. Farrell, R. Housley · obsoleted by RFC 5755 | Proposed Standard | May 2002 |
| 4055 | Additional Algorithms and Identifiers for RSA Cryptography for use in the Internet X.509 Public Key Infrastructure Certificate and Certificate Revocation List (CRL) ProfileJ. Schaad, B. Kaliski, R. Housley | Proposed Standard | June 2005 |
| 4120 | The Kerberos Network Authentication Service (V5)C. Neuman, T. Yu, S. Hartman, K. Raeburn | Proposed Standard | July 2005 |
| 4511 | Lightweight Directory Access Protocol (LDAP): The ProtocolJ. Sermersheim, Ed. | Proposed Standard | June 2006 |
| 4516 | Lightweight Directory Access Protocol (LDAP): Uniform Resource LocatorM. Smith, Ed., T. Howes | Proposed Standard | June 2006 |
| 4985 | Internet X.509 Public Key Infrastructure Subject Alternative Name for Expression of Service NameS. Santesson | Proposed Standard | August 2007 |
| 5280 | Internet X.509 Public Key Infrastructure Certificate and Certificate Revocation List (CRL) ProfileD. Cooper, S. Santesson, S. Farrell, S. Boeyen, R. Housley, W. Polk | Proposed Standard | May 2008 |
| 5480 | Elliptic Curve Cryptography Subject Public Key InformationS. Turner, D. Brown, K. Yiu, R. Housley, T. Polk | Proposed Standard | March 2009 |
| 5652 | Cryptographic Message Syntax (CMS)R. Housley | Internet Standard | September 2009 |
| 5741 | RFC Streams, Headers, and BoilerplatesL. Daigle, Ed., O. Kolkman, Ed., IAB · obsoleted by RFC 7841 | Informational | December 2009 |
| 5756 | Updates for RSAES-OAEP and RSASSA-PSS Algorithm ParametersS. Turner, D. Brown, K. Yiu, R. Housley, T. Polk | Proposed Standard | January 2010 |