Internet Assigned Numbers Authority IPv6 Global Unicast Address Assignments Last Updated 2024-04-23 Registration Procedure(s) Allocations to RIRs are made in line with the Global Policy published at [http://www.icann.org/en/resources/policy/global-addressing]. All other assignments require IETF Review. Description The allocation of Internet Protocol version 6 (IPv6) unicast address space is listed here. References to the various other registries detailing the use of the IPv6 address space can be found in the [IPv6 Address Space registry]. Reference [RFC7249] Note The assignable Global Unicast Address space is defined in [RFC3513] as the address block defined by the prefix 2000::/3. [RFC3513] was later obsoleted by [RFC4291]. All address space in this block not listed in the table below is reserved by IANA for future allocation. Available Formats [IMG] CSV [IMG] XML [IMG] HTML [IMG] Plain text Prefix Designation Date WHOIS RDAP Status Note 2001:0000::/23 is reserved for IETF Protocol Assignments [RFC2928]. 2001:0000::/32 is reserved for TEREDO [RFC4380]. 2001:1::1/128 is reserved for Port Control Protocol Anycast [RFC7723]. 2001:1::2/128 is reserved for Traversal Using Relays around NAT Anycast [RFC8155]. 2001:1::3/128 is reserved for DNS-SD Service Registration Protocol Anycast [RFC-ietf-dnssd-srp-25]. 2001:2::/48 is 2001:0000::/23 IANA 1999-07-01 whois.iana.org ALLOCATED reserved for Benchmarking [RFC5180][RFC Errata 1752]. 2001:3::/32 is reserved for AMT [RFC7450]. 2001:4:112::/48 is reserved for AS112-v6 [RFC7535]. 2001:10::/28 is deprecated (previously ORCHID) [RFC4843]. 2001:20::/28 is reserved for ORCHIDv2 [RFC7343]. 2001:30::/28 is reserved for Drone Remote ID Protocol Entity Tags (DETs) [RFC9374]. For complete registration details, see [IANA registry iana-ipv6-special-registry]. 2001:0200::/23 APNIC 1999-07-01 whois.apnic.net https://rdap.apnic.net/ ALLOCATED 2001:0400::/23 ARIN 1999-07-01 whois.arin.net https://rdap.arin.net/registry ALLOCATED http://rdap.arin.net/registry 2001:0600::/23 RIPE NCC 1999-07-01 whois.ripe.net https://rdap.db.ripe.net/ ALLOCATED 2001:0800::/23 was allocated on 2002-05-02. 2001:0800::/22 RIPE NCC 2002-11-02 whois.ripe.net https://rdap.db.ripe.net/ ALLOCATED The more recent allocation (2002-11-02) incorporates the previous allocation. 2001:db8::/32 reserved for Documentation 2001:0c00::/23 APNIC 2002-05-02 whois.apnic.net https://rdap.apnic.net/ ALLOCATED [RFC3849]. For complete registration details, see [IANA registry iana-ipv6-special-registry]. 2001:0e00::/23 APNIC 2003-01-01 whois.apnic.net https://rdap.apnic.net/ ALLOCATED 2001:1200::/23 LACNIC 2002-11-01 whois.lacnic.net https://rdap.lacnic.net/rdap/ ALLOCATED 2001:1400::/23 was allocated on 2003-02-01. 2001:1400::/22 RIPE NCC 2003-07-01 whois.ripe.net https://rdap.db.ripe.net/ ALLOCATED The more recent allocation (2003-07-01) incorporates the previous allocation. 2001:1800::/23 ARIN 2003-04-01 whois.arin.net https://rdap.arin.net/registry ALLOCATED http://rdap.arin.net/registry 2001:1a00::/23 RIPE NCC 2004-01-01 whois.ripe.net https://rdap.db.ripe.net/ ALLOCATED 2001:1c00::/22 RIPE NCC 2004-05-04 whois.ripe.net https://rdap.db.ripe.net/ ALLOCATED 2001:2000::/20, 2001:3000::/21, and 2001:3800::/22 were allocated on 2001:2000::/19 RIPE NCC 2019-03-12 whois.ripe.net https://rdap.db.ripe.net/ ALLOCATED 2004-05-04. The more recent allocation (2019-03-12) incorporates all these previous allocations. 2001:4000::/23 RIPE NCC 2004-06-11 whois.ripe.net https://rdap.db.ripe.net/ ALLOCATED 2001:4200::/23 AFRINIC 2004-06-01 whois.afrinic.net https://rdap.afrinic.net/rdap/ ALLOCATED http://rdap.afrinic.net/rdap/ 2001:4400::/23 APNIC 2004-06-11 whois.apnic.net https://rdap.apnic.net/ ALLOCATED 2001:4600::/23 RIPE NCC 2004-08-17 whois.ripe.net https://rdap.db.ripe.net/ ALLOCATED 2001:4800::/23 ARIN 2004-08-24 whois.arin.net https://rdap.arin.net/registry ALLOCATED http://rdap.arin.net/registry 2001:4a00::/23 RIPE NCC 2004-10-15 whois.ripe.net https://rdap.db.ripe.net/ ALLOCATED 2001:4c00::/23 RIPE NCC 2004-12-17 whois.ripe.net https://rdap.db.ripe.net/ ALLOCATED 2001:5000::/20 RIPE NCC 2004-09-10 whois.ripe.net https://rdap.db.ripe.net/ ALLOCATED 2001:8000::/19 APNIC 2004-11-30 whois.apnic.net https://rdap.apnic.net/ ALLOCATED 2001:a000::/20 APNIC 2004-11-30 whois.apnic.net https://rdap.apnic.net/ ALLOCATED 2001:b000::/20 APNIC 2006-03-08 whois.apnic.net https://rdap.apnic.net/ ALLOCATED 2002::/16 is reserved for 6to4 [RFC3056]. 2002:0000::/16 6to4 2001-02-01 ALLOCATED For complete registration details, see [IANA registry iana-ipv6-special-registry]. 2003:0000::/18 RIPE NCC 2005-01-12 whois.ripe.net https://rdap.db.ripe.net/ ALLOCATED 2400:0000::/19 was allocated on 2005-05-20. 2400:2000::/19 was allocated on 2005-07-08. 2400:4000::/21 was allocated on 2005-08-08. 2400:0000::/12 APNIC 2006-10-03 whois.apnic.net https://rdap.apnic.net/ ALLOCATED 2404:0000::/23 was allocated on 2006-01-19. The more recent allocation (2006-10-03) incorporates all these previous allocations. 2600:0000::/22, 2604:0000::/22, https://rdap.arin.net/registry 2608:0000::/22 and 260c:0000::/22 were 2600:0000::/12 ARIN 2006-10-03 whois.arin.net http://rdap.arin.net/registry ALLOCATED allocated on 2005-04-19. The more recent allocation (2006-10-03) incorporates all these previous allocations. 2610:0000::/23 ARIN 2005-11-17 whois.arin.net https://rdap.arin.net/registry ALLOCATED http://rdap.arin.net/registry 2620:0000::/23 ARIN 2006-09-12 whois.arin.net https://rdap.arin.net/registry ALLOCATED http://rdap.arin.net/registry 2630:0000::/12 ARIN 2019-11-06 whois.arin.net https://rdap.arin.net/registry ALLOCATED http://rdap.arin.net/registry 2800:0000::/23 was allocated on 2005-11-17. 2800:0000::/12 LACNIC 2006-10-03 whois.lacnic.net https://rdap.lacnic.net/rdap/ ALLOCATED The more recent allocation (2006-10-03) incorporates the previous allocation. 2a00:0000::/21 was originally allocated on 2005-04-19. 2a01:0000::/23 was allocated on 2005-07-14. 2a01:0000::/16 (incorporating 2a00:0000::/12 RIPE NCC 2006-10-03 whois.ripe.net https://rdap.db.ripe.net/ ALLOCATED the 2a01:0000::/23) was allocated on 2005-12-15. The more recent allocation (2006-10-03) incorporates these previous allocations. 2a10:0000::/12 RIPE NCC 2019-06-05 whois.ripe.net https://rdap.db.ripe.net/ ALLOCATED 2c00:0000::/12 AFRINIC 2006-10-03 whois.afrinic.net https://rdap.afrinic.net/rdap/ ALLOCATED http://rdap.afrinic.net/rdap/ 2d00:0000::/8 IANA 1999-07-01 RESERVED 2e00:0000::/7 IANA 1999-07-01 RESERVED 3000:0000::/4 IANA 1999-07-01 RESERVED 3ffe:831f::/32 was used for Teredo in some old but widely distributed networking stacks. This usage is deprecated in favor 3ffe::/16 IANA 2008-04 RESERVED of 2001::/32, which was allocated for the purpose in [RFC4380]. 3ffe::/16 and 5f00::/8 were used for the 6bone but were returned. [RFC5156] 3ffe::/16 and 5f00::/8 were used for the 5f00::/8 IANA 2008-04 RESERVED 6bone but were returned. [RFC5156]. 5f00::/16 is reserved for Segment Routing (SRv6) SIDs [RFC-ietf-6man-sids-06] 5f00::/16 is reserved for Segment Routing 5f00::/16 Segment Routing 2024-04-23 ALLOCATED (SRv6) SIDs [RFC-ietf-6man-sids-06]. For (SRv6) SIDs complete registration details, see [IANA registry iana-ipv6-special-registry]. Licensing Terms