---
author: canory
date: 2026-05-29T00:00:00Z
tags: [feeds]
feed:
  description: "Recently published RFCs"
  domain: "www.rfc-editor.org"
  enclosure: ""
  favicon: "/data/media/favicon.httpswwwrfc-editororgrfcrssxml.png"
  home: ""
  link: "https://www.rfc-editor.org/info/rfc9977/"
  name: "Recent RFCs"
  source: "https://www.rfc-editor.org/rfcrss.xml"
---

This document specifies how to augment the Routing Policy Specification Language (RPSL) inetnum: class to refer specifically to prefixlen files, which are Comma-Separated Values (CSV) files used to specify end-site prefix lengths. This document also...