Number-related Registries
These are the registries we maintain for the three core number resource types: IPv4 addresses, IPv6 addresses, and Autonomous System Numbers.
| Registry | Description |
|---|---|
| Internet Protocol Version 4 (IPv4) | |
| IPv4 Address Space | The top-level delegation of the IPv4 unicast address space. |
| IPv4 Multicast Address Space | Assignments within the IPv4 multicast address range. |
| IPv4 Special-Purpose Address Space | Address blocks reserved for special uses, such as private networks and documentation. |
| IPv4 Recovered Address Space | Address space returned to IANA and redistributed to the RIRs. |
| RDAP Bootstrap for IPv4 | The registration data service operators for each IPv4 address range. |
| Locally Served DNS Zones | Reverse DNS zones for private and special-use addresses that should be answered locally (covers IPv4 and IPv6). |
| Internet Protocol Version 6 (IPv6) | |
| IPv6 Address Space | The top-level delegation of the IPv6 address space. |
| IPv6 Global Unicast Address Space | Allocations of global unicast address blocks, primarily to the RIRs. |
| IPv6 Anycast Address Space | Reserved anycast addresses within IPv6. |
| IPv6 Multicast Address Space | Assignments within the IPv6 multicast address range. |
| IPv6 Special-Purpose Address Space | Address blocks reserved for special uses, such as documentation and translation mechanisms. |
| IPv6 Sub-TLA Assignments | A deprecated historical registry from the early IPv6 allocation scheme. |
| RDAP Bootstrap for IPv6 | The registration data service operators for each IPv6 address range. |
| Autonomous System Numbers | |
| Autonomous System Numbers | Allocations of AS number blocks, primarily to the RIRs. |
| Special-Purpose AS Numbers | AS numbers reserved for special uses, such as documentation and private use. |
| RDAP Bootstrap for AS Numbers | The registration data service operators for each AS number range. |