| RFC | Status | Reference | Notes |
|---|---|---|---|
| 3701 | Informational | R. Fink; R. Hinden (March 2004). 6bone (IPv6 Testing Address Allocation) Phaseout. Network Working Group. doi:10.17487/RFC3701. RFC 3701. | Obsoletes RFC 2471. |
| 3704 | Best Common Practice | F. Baker; P. Savola (March 2004). Ingress Filtering for Multihomed Networks. IETF. doi:10.17487/RFC3704. BCP 84. RFC 3704. | Updated by RFC 8704. Updates RFC 2827. |
| 3720 | Obsolete | J. Satran; K. Meth; C. Sapuntzakis; M. Chadalapaka; E. Zeidner (April 2004). Internet Small Computer Systems Interface (iSCSI). Network Working Group. doi:10.17487/RFC3720. RFC 3720. | Obsoleted by RFC 7143. |
| 3751 | Informational | S. Bradner (1 April 2004). Omniscience Protocol Requirements. Network Working Group. doi:10.17487/RFC3751. RFC 3751. | This is an April Fools' Day Request for Comments. |
| 3768 | Obsolete | R. Hinden, ed. (April 2004). Virtual Router Redundancy Protocol (VRRP). Network Working Group. doi:10.17487/RFC3768. RFC 3768. | Obsoleted by RFC 5798. Obsoletes RFC 2338. |
