| 1918 | Address Allocation for Private InternetsY. Rekhter, B. Moskowitz, D. Karrenberg, G. J. de Groot, E. Lear | Best Current Practice | February 1996 |
| 2923 | TCP Problems with Path MTU DiscoveryK. Lahey | Informational | September 2000 |
| 3053 | IPv6 Tunnel BrokerA. Durand, P. Fasano, I. Guardini, D. Lento | Informational | January 2001 |
| 3056 | Connection of IPv6 Domains via IPv4 CloudsB. Carpenter, K. Moore | Proposed Standard | February 2001 |
| 3068 | An Anycast Prefix for 6to4 Relay RoutersC. Huitema · obsoleted by RFC 7526 | Historic | June 2001 |
| 3484 | Default Address Selection for Internet Protocol version 6 (IPv6)R. Draves · obsoleted by RFC 6724 | Proposed Standard | March 2003 |
| 3704 | Ingress Filtering for Multihomed NetworksF. Baker, P. Savola | Best Current Practice | March 2004 |
| 3964 | Security Considerations for 6to4P. Savola, C. Patel | Informational | December 2004 |
| 4191 | Default Router Preferences and More-Specific RoutesR. Draves, D. Thaler | Proposed Standard | November 2005 |
| 4213 | Basic Transition Mechanisms for IPv6 Hosts and RoutersE. Nordmark, R. Gilligan | Proposed Standard | October 2005 |
| 4890 | Recommendations for Filtering ICMPv6 Messages in FirewallsE. Davies, J. Mohacsi | Informational | May 2007 |
| 5158 | 6to4 Reverse DNS Delegation SpecificationG. Huston | Informational | March 2008 |
| 5571 | Softwire Hub and Spoke Deployment Framework with Layer Two Tunneling Protocol Version 2 (L2TPv2)B. Storer, C. Pignataro, Ed., M. Dos Santos, B. Stevant, Ed., L. Toutain, J. Tremblay | Proposed Standard | June 2009 |
| 5741 | RFC Streams, Headers, and BoilerplatesL. Daigle, Ed., O. Kolkman, Ed., IAB · obsoleted by RFC 7841 | Informational | December 2009 |
| 5969 | IPv6 Rapid Deployment on IPv4 Infrastructures (6rd) -- Protocol SpecificationW. Townsley, O. Troan | Proposed Standard | August 2010 |
| 6104 | Rogue IPv6 Router Advertisement Problem StatementT. Chown, S. Venaas | Informational | February 2011 |
| 6105 | IPv6 Router Advertisement GuardE. Levy-Abegnoli, G. Van de Velde, C. Popoviciu, J. Mohacsi | Informational | February 2011 |
| 6169 | Security Concerns with IP TunnelingS. Krishnan, D. Thaler, J. Hoagland | Informational | April 2011 |
| 6269 | Issues with IP Address SharingM. Ford, Ed., M. Boucadair, A. Durand, P. Levis, P. Roberts | Informational | June 2011 |