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

2016 Annual Customer Survey. ICANN has engaged Ebiquity to administer its 2016 Annual Customer Survey. If you have made use of IANA request services in the last year you can expect to receive an invitation from Judy Bromley to participate in a survey hosted at https://www.ebiquityinsights.com/.