Internet Protocol version 6 (IPv6) Global Unicast Allocations 2025-10-10 Allocations to RIRs are made in line with the Global Policy published at . All other assignments require IETF Review. 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. The assignable Global Unicast Address space is defined in as the address block defined by the prefix 2000::/3. was later obsoleted by . All address space in this block not listed in the table below is reserved by IANA for future allocation. IPv6 Global Unicast Address Assignments 2001::/23 IANA whois.iana.org ALLOCATED This range has been partially allocated. See IPv6 Special-Purpose Address Space for details. 2001:200::/23 APNIC whois.apnic.net ALLOCATED https://rdap.apnic.net/ 2001:400::/23 ARIN whois.arin.net ALLOCATED https://rdap.arin.net/registry http://rdap.arin.net/registry 2001:600::/23 RIPE NCC whois.ripe.net ALLOCATED https://rdap.db.ripe.net/ 2001:800::/22 RIPE NCC whois.ripe.net ALLOCATED https://rdap.db.ripe.net/ 2001:800::/23 was allocated on 2002-05-02. The more recent allocation (2002-11-02) incorporates the previous allocation. 2001:c00::/23 APNIC whois.apnic.net ALLOCATED https://rdap.apnic.net/ 2001:db8::/32 is reserved for Documentation . See IPv6 Special-Purpose Address Space for details. 2001:e00::/23 APNIC whois.apnic.net ALLOCATED https://rdap.apnic.net/ 2001:1200::/23 LACNIC whois.lacnic.net ALLOCATED https://rdap.lacnic.net/rdap/ 2001:1400::/22 RIPE NCC whois.ripe.net ALLOCATED https://rdap.db.ripe.net/ 2001:1400::/23 was allocated on 2003-02-01. The more recent allocation (2003-07-01) incorporates the previous allocation. 2001:1800::/23 ARIN whois.arin.net ALLOCATED https://rdap.arin.net/registry http://rdap.arin.net/registry 2001:1a00::/23 RIPE NCC whois.ripe.net ALLOCATED https://rdap.db.ripe.net/ 2001:1c00::/22 RIPE NCC whois.ripe.net ALLOCATED https://rdap.db.ripe.net/ 2001:2000::/19 RIPE NCC whois.ripe.net ALLOCATED https://rdap.db.ripe.net/ 2001:2000::/20, 2001:3000::/21, and 2001:3800::/22 were allocated on 2004-05-04. The more recent allocation (2019-03-12) incorporates all these previous allocations. 2001:4000::/23 RIPE NCC whois.ripe.net ALLOCATED https://rdap.db.ripe.net/ 2001:4200::/23 AFRINIC whois.afrinic.net ALLOCATED https://rdap.afrinic.net/rdap/ http://rdap.afrinic.net/rdap/ 2001:4400::/23 APNIC whois.apnic.net ALLOCATED https://rdap.apnic.net/ 2001:4600::/23 RIPE NCC whois.ripe.net ALLOCATED https://rdap.db.ripe.net/ 2001:4800::/23 ARIN whois.arin.net ALLOCATED https://rdap.arin.net/registry http://rdap.arin.net/registry 2001:4a00::/23 RIPE NCC whois.ripe.net ALLOCATED https://rdap.db.ripe.net/ 2001:4c00::/23 RIPE NCC whois.ripe.net ALLOCATED https://rdap.db.ripe.net/ 2001:5000::/20 RIPE NCC whois.ripe.net ALLOCATED https://rdap.db.ripe.net/ 2001:8000::/19 APNIC whois.apnic.net ALLOCATED https://rdap.apnic.net/ 2001:a000::/20 APNIC whois.apnic.net ALLOCATED https://rdap.apnic.net/ 2001:b000::/20 APNIC whois.apnic.net ALLOCATED https://rdap.apnic.net/ 2002::/16 6to4 ALLOCATED See IPv6 Special-Purpose Address Space for details. 2003::/18 RIPE NCC whois.ripe.net ALLOCATED https://rdap.db.ripe.net/ 2400::/12 APNIC whois.apnic.net ALLOCATED https://rdap.apnic.net/ 2400::/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. 2404::/23 was allocated on 2006-01-19. The more recent allocation (2006-10-03) incorporates all these previous allocations. 2410::/12 APNIC whois.apnic.net ALLOCATED https://rdap.apnic.net/ 2600::/12 ARIN whois.arin.net ALLOCATED https://rdap.arin.net/registry http://rdap.arin.net/registry 2600::/22, 2604::/22, 2608::/22 and 260c::/22 were allocated on 2005-04-19. The more recent allocation (2006-10-03) incorporates all these previous allocations. 2610::/23 ARIN whois.arin.net ALLOCATED https://rdap.arin.net/registry http://rdap.arin.net/registry 2620::/23 ARIN whois.arin.net ALLOCATED https://rdap.arin.net/registry http://rdap.arin.net/registry 2630::/12 ARIN whois.arin.net ALLOCATED https://rdap.arin.net/registry http://rdap.arin.net/registry 2800::/12 LACNIC whois.lacnic.net ALLOCATED https://rdap.lacnic.net/rdap/ 2800::/23 was allocated on 2005-11-17. The more recent allocation (2006-10-03) incorporates the previous allocation. 2a00::/12 RIPE NCC whois.ripe.net ALLOCATED https://rdap.db.ripe.net/ 2a00::/21 was originally allocated on 2005-04-19. 2a01::/23 was allocated on 2005-07-14. 2a01::/16 (incorporating the 2a01::/23) was allocated on 2005-12-15. The more recent allocation (2006-10-03) incorporates these previous allocations. 2a10::/12 RIPE NCC whois.ripe.net ALLOCATED https://rdap.db.ripe.net/ 2c00::/12 AFRINIC whois.afrinic.net ALLOCATED https://rdap.afrinic.net/rdap/ http://rdap.afrinic.net/rdap/ 2d00::/8 IANA RESERVED 2e00::/7 IANA RESERVED 3000::/5 IANA RESERVED 3800::/6 IANA RESERVED 3c00::/7 IANA RESERVED 3e00::/8 IANA RESERVED 3f00::/9 IANA RESERVED 3f80::/10 IANA RESERVED 3fc0::/11 IANA RESERVED 3fe0::/12 IANA RESERVED 3ff0::/13 IANA RESERVED 3ff8::/14 IANA RESERVED 3ffc::/15 IANA RESERVED 3ffe::/16 IANA RESERVED 3ffe:831f::/32 was used for Teredo in some old but widely distributed networking stacks. This usage is deprecated in favor of 2001::/32, which was allocated for the purpose in . 3ffe::/16 and 5f00::/8 were used for the 6bone, but returned . 3fff::/20 Documentation RESERVED See IPv6 Special-Purpose Address Space for details.