Current Prefix Allocations

Table B-21 lists the prefixes initially assigned in RFC 2373.

Table B-21. List of assigned prefixes

Allocation

Prefix binary

Prefix hex

Fraction of address space

Reserved

0000 0000

1/256

Reserved for NSAP allocation

Reserved for IPX allocation (deprecated in later draft)

0000 001

0000 010

1/128

1/128

Aggregatable global unicast addresses

001

1/8

Link-local unicast addresses

Site-local unicast addresses

1111 1110 10

1111 1110 11

FE80

FEC0

1/1024

1/1024

Multicast addresses

1111 1111

FF

1/256

Table B-22 lists the current TLA allocations.

Table B-22. Current TLA allocations

Prefix

Allocated to

RFC

2001::/16

Sub-TLA Assignments

ARIN 2001:0400::/29

RIPE NCC 2001:0600::/29

APNIC 2001:0200::/29

RFC 2450

2002::/16

6to4

RFC 3056

3FFE::/16

6Bone Testing

RFC 2471

As of February, 2002, over 120 production networks have been allocated IPv6 address prefixes. For a current list, refer to http://www.dfn.de/service/ipv6/ipv6aggis.html.

Get IPv6 Essentials now with O’Reilly online learning.

O’Reilly members experience live online training, plus books, videos, and digital content from 200+ publishers.