Root Zone Management Domains Protocols Numbers About Root Zone Management 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. Top-level Domains 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. Files and Downloads The root zone DNS data is available for download as a DNS zone file along with associated trust information, and in other formats. Delegation Management Existing TLD managers can maintain their delegation details through our online interface. Instructions and Guides Articles covering the rules governing what top-level domains are permissible, the procedures to register and update top-level domains, and other related topics. Root Zone DNSSEC Information Information about DNSSEC in the root zone, including the trust anchor for the DNS. Domain Names Overview Root Zone Management Overview Top-Level Domains Files and Downloads Manage Delegations Instructions & Guides .INT Registry Overview Register/modify an .INT domain Eligibility .ARPA Registry IDN Practices Repository Overview Submit a table Root Key Signing Key (DNSSEC) Overview Trust Anchors and Rollovers Key Signing Ceremonies Policies & Procedures Community Representatives Reserved Domains Domain Names Root Zone Registry .INT Registry .ARPA Registry IDN Repository Number Resources Number Registries RIR Allocation Data Abuse Information Protocols Protocol Registries Time Zone Database About Us News Performance The Organization Archive Contact Us The IANA functions coordinate the Internet’s globally unique identifiers, and are provided by Public Technical Identifiers, an affiliate of ICANN. Privacy Policy Terms of Service