RFC 7300 · BEST CURRENT PRACTICE · 2014
SUN · 14 JUN 2026
Reservation of Last Autonomous System Numbers
Overview
RFC 7300, “Reservation of Last Autonomous System Numbers”, is a Best Current Practice document published in July 2014 by J. Haas, J. Mitchell. It updates RFC 1930. The canonical text is published by the RFC Editor.
Abstract
This document reserves two Autonomous System Numbers (ASNs) at the end of the 16-bit and 32-bit ranges, described in this document as "Last ASNs", and provides guidance to implementers and operators on their use. This document updates Section 10 of RFC 1930.
What “Best Current Practice” means
Documents the IETF community's recommended operational or procedural practice rather than a protocol specification.
Read this RFC
The canonical text of RFC 7300 is hosted at rfc-editor.org. Available in TXT,HTML.
Relationships to other RFCs
Other RFCs from 2014
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- RFC 7302 Entertainment Identifier Registry URN Namespace Definition
- RFC 7297 IP Connectivity Provisioning Profile
- RFC 7303 XML Media Types
- RFC 7296 Internet Key Exchange Protocol Version 2
- RFC 7304 A Method for Mitigating Namespace Collisions