Root Zone Management
Top-level Domains
Files and Downloads
Delegation Management
Instructions and Guides
Root Zone DNSSEC Information
The Domain Name System (DNS) root zone is the highest-level of the naming hierarchy, principally composed of delegations of top-level domains (such as .edu or .in). In managing the DNS root zone, IANA responsibilities include assigning managers for these domains, recording technical delegation data in the root zone, and publishing a registry of related information.
The Top-Level Domain Registry (also known as the Root Zone Database) is the authoritative record of top-level domains, including the organization that manages the domains, technical details and contact information.
The root zone DNS data is available for download as a DNS zone file along with associated trust information, and in other formats.
Existing TLD managers can maintain their delegation details through our online interface.
Articles covering the rules governing what top-level domains are permissible, the procedures to register and update top-level domains, and other related topics.
Information about DNSSEC in the root zone, including the trust anchor for the DNS.
