| RFC | Status | Reference | Notes |
|---|---|---|---|
| 3101 | Proposed Standard | P. Murphy (January 2001). The OSPF Not-So-Stubby Area (NSSA) Option. Network Working Group. doi:10.17487/RFC3101. RFC 3101. | Obsoletes RFC 1587. |
| 3118 | Proposed Standard | R. Droms; W. Arbaugh, eds. (June 2001). Authentication for DHCP Messages. Network Working Group. doi:10.17487/RFC3118. RFC 3118. | |
| 3140 | Proposed Standard | D. Black; S. Brim; B. Carpenter; F. Le Faucheur (June 2001). Per Hop Behavior Identification Codes. Network Working Group. doi:10.17487/RFC3140. BCP 53. RFC 3140. | Obsoletes RFC 2836. |
| 3152 | Obsolete | R. Bush (August 2001). Delegation of IP6.ARPA. Network Working Group. doi:10.17487/RFC3152. BCP 49. RFC 3152. | Obsoleted by RFC 3596. Updates RFC 1886, 2553, 2766, 2772 and 2874 |
| 3168 | Proposed Standard | K. Ramakrishnan; S. Floyd; D. Black (September 2001). The Addition of Explicit Congestion Notification (ECN) to IP. Network Working Group. doi:10.17487/RFC3168. RFC 3168. | Obsoletes RFC 2481. Updates RFC 2474, 2401 and 793. Updated by RFC 4301, 6040 and 8311. |
| 3171 | Obsolete | Z. Albanna; K. Almeroth; D. Meyer; M. Schipper (September 2001). IANA Guidelines for IPv4 Multicast Address Assignments. Network Working Group. doi:10.17487/RFC3171. BCP 51. RFC 3171. | Obsoleted by RFC 5771. |
| 3177 | Obsolete | IAB; IESG (September 2001). IAB/IESG Recommendations on IPv6 Address Allocations to Sites. Network Working Group. doi:10.17487/RFC3177. RFC 3177. | Obsoleted by RFC 6177. |
| 3180 | Best Common Practice | D. Meyer; P. Lothberg (September 2001). GLOP Addressing in 233/8. Network Working Group. doi:10.17487/RFC3180. BCP 53. RFC 3180. | Obsoletes RFC 2770. |
