Internet Assigned Numbers Authority

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

Domain Names

IANA manages 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

IANA coordinates allocations from the global IP and AS number spaces, such as those made to Regional Internet Registries.

IP Addresses & AS Numbers
Network abuse information

Protocol Assignments

IANA is the central repository for protocol name and number registries used in many Internet protocols.

Protocol Registries
Apply for an assignment
Time Zone Database

IANA Customer Survey. We recently conducted our third annual customer satisfaction survey. We have now analyzed the results and can share them with the community. This report summarizes the survey methodology and the responses received.