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                                                              IPv6 Anycast Address Space

   Last Updated
   2025-10-09

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   Registries Included Below

     • IPv6 Anycast Address Space
     • IPv6 Anycast Subnet-Router Anycast Address

IPv6 Anycast Address Space

   Registration Procedure(s)

 IESG Approval

   Reference
   [RFC4291][RFC2526]

   Note

 IPv6 anycast addresses are defined in "IP Version 6 Addressing
 Architecture" [RFC4291]. [RFC2526] further defines a set of
 reserved subnet anycast addresses. These are the highest 128
 interface identifier values, within each subnet.  The syntax
 and rules for assigning new IPv6 reserved subnet anycast addresses
 are defined in [RFC2526].  These addresses are assigned in descending
 order.

   Formerly known as

 Internet Protocol Version 6 (IPv6) Anycast Addresses

   Available Formats
   [IMG]
   CSV

   Decimal Hexadecimal            Description                          Reference                                      Note
   127     0x7F        Reserved
   126     0x7E        Mobile IPv6 Home-Agents anycast    [RFC2526]                           Also see [RFC3775]
   125     0x7D        IPv6 over GeoNetworking geographic [ETSI EN 302 636-6-1][Martin_Arndt] To be used for all published versions of [ETSI EN 302
                       anycast                                                                636-6-1]
   1-124   0x01-0x7D   Reserved

IPv6 Anycast Subnet-Router Anycast Address

   Registration Procedure(s)

 IESG Approval

   Reference
   [RFC4291]

   Available Formats
   [IMG]
   CSV

   Decimal Hexadecimal          Description          Reference Note
   0       0x00        Subnet-Router Anycast Address [RFC4291]

                                                                 Contact Information

         ID           Name             Contact URI          Last Updated
   [Martin_Arndt] Martin Arndt mailto:Martin.Arndt&etsi.org 2014-05-16

   Licensing Terms