Internet Numbers Registries
RFC 7249

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Internet Engineering Task Force (IETF)                        R. Housley
Request for Comments: 7249                                Vigil Security
Category: Informational                                         May 2014
ISSN: 2070-1721

                      Internet Numbers Registries

Abstract

   RFC 7020 provides information about the Internet Numbers Registry
   System and how it is used in the distribution of autonomous system
   (AS) numbers and globally unique unicast Internet Protocol (IP)
   address space.

   This companion document identifies the IANA registries that are part
   of the Internet Numbers Registry System at this time.

Status of This Memo

   This document is not an Internet Standards Track specification; it is
   published for informational purposes.

   This document is a product of the Internet Engineering Task Force
   (IETF).  It represents the consensus of the IETF community.  It has
   received public review and has been approved for publication by the
   Internet Engineering Steering Group (IESG).  Not all documents
   approved by the IESG are a candidate for any level of Internet
   Standard; see Section 2 of RFC 5741.

   Information about the current status of this document, any errata,
   and how to provide feedback on it may be obtained at
   http://www.rfc-editor.org/info/rfc7249.

Copyright Notice

   Copyright (c) 2014 IETF Trust and the persons identified as the
   document authors.  All rights reserved.

   This document is subject to BCP 78 and the IETF Trust's Legal
   Provisions Relating to IETF Documents
   (http://trustee.ietf.org/license-info) in effect on the date of
   publication of this document.  Please review these documents
   carefully, as they describe your rights and restrictions with respect
   to this document.  Code Components extracted from this document must
   include Simplified BSD License text as described in Section 4.e of
   the Trust Legal Provisions and are provided without warranty as
   described in the Simplified BSD License.

Housley                       Informational                     [Page 1]
RFC 7249               Internet Numbers Registries              May 2014

1.  Introduction

   In accordance with the IETF-IANA Memorandum of Understanding
   [RFC2860], RFC 7020 [RFC7020] provides information about the Internet
   Numbers Registry System and how it is used in the distribution of
   autonomous system (AS) numbers and globally unique unicast Internet
   Protocol (IP) address space.

   This companion document identifies the IANA registries that are part
   of the Internet Numbers Registry System at this time.

2.  Internet Numbers Registries

   Three IANA registries are associated with the Internet Numbers
   Registry System: "Autonomous System (AS) Numbers", "IANA IPv4 Address
   Space Registry", and "IPv6 Global Unicast Address Assignments".
   However, in each case, there are special-purpose values, and those
   special-purpose values are outside the Internet Numbers Registry
   System.

2.1.  Autonomous System Numbers

   For historical reasons, there are 16-bit AS numbers and 32-bit AS
   numbers.  However, the 16-bit AS numbers are really just zero through
   65535 of the 32-bit AS number space.

   The allocation and registration functions for all non-reserved AS
   numbers are handled by the Internet Numbers Registry System in
   accordance with policies developed by the Regional Internet
   Registries (RIRs) in accordance with their processes.

   Some special-purpose AS numbers have been reserved.  Section 3 of
   this document establishes an IANA registry for special-purpose AS
   Numbers that have already been reserved.  Future additions to this
   registry can be made through "IETF Review" as defined in [RFC5226].
   Once a reservation is approved, it is recorded in the special-purpose
   AS numbers registry with a reference to the IESG-approved RFC that
   documents the reservation.

Housley                       Informational                     [Page 2]
RFC 7249               Internet Numbers Registries              May 2014

2.2.  IPv4 Addresses

   The allocation and registration functions for all non-reserved,
   globally unique unicast IPv4 addresses are handled by the Internet
   Numbers Registry System in accordance with policies developed by the
   RIRs in accordance with their processes.

   Reservations of special-purpose IPv4 addresses can be found in the
   IANA registry [IANA-IPv4-Reg].  Future additions to this registry can
   be made through "IETF Review" as defined in [RFC5226].  Once a
   reservation is approved, it is recorded in the special-purpose IPv4
   address registry with a reference to the IESG-approved RFC that
   documents the reservation.

2.3.  IPv6 Addresses

   The vast bulk of the IPv6 address space (approximately 7/8ths of the
   whole address space) is reserved by the IETF [RFC4291], with the
   expectation that further assignment of globally unique unicast