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.

Number Resources

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

Protocol Assignments

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

ICANN is currently conducting the 2015 Annual IANA Customer Satisfaction Survey. If you have made use of the IANA services in the last year you should have received an invitation from Jennifer Clark at Ebiquity to participate in a survey hosted at Reminder emails will be sent next week asking for your participation before the survey closes on October 13th.