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RFC 9977 - Publishing End-Site Prefix Lengths

  • Status: Proposed Standard
  • Published: May 2026
  • Stream: IETF
  • Errata: No Errata

Abstract​

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 describes an optional mechanism that uses the Resource Public Key Infrastructure (RPKI) to authenticate the prefixlen files.

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