Internet Assigned Numbers Authority

The global coordination of the DNS Root, IP addressing, and other Internet protocol resources is performed as the Internet Assigned Numbers Authority (IANA) functions. Learn more.

Domain Names

Management of the DNS Root Zone (assignments of ccTLDs and gTLDs) along with other functions such as the .int and .arpa zones.

Root Zone Management
Database of Top Level Domains
.int Registry
.arpa Registry
IDN Practices Repository

Number Resources

Coordination of the global IP and AS number spaces, such as allocations made to Regional Internet Registries.

IP Addresses & AS Numbers
Network abuse information

Protocol Assignments

The central repository for protocol name and number registries used in many Internet protocols.

Protocol Registries
Apply for an assignment
Time Zone Database

Revised Privacy Policy and Terms of Service. We have updated our privacy policies and certain website terms of service to provide greater transparency, promote simplification, and align with recent changes in privacy laws applicable to us. Learn more.