IANA Offline TLD Directory
Search an offline IANA root-zone snapshot by suffix or registry manager, with official types, Unicode labels and dated delegation-list membership.
About this iana offline tld directory
Search an offline IANA root-zone snapshot by suffix or registry manager, with official types, Unicode labels and dated delegation-list membership Performs protocol inspection, IP calculation, and network analysis client-side without sending probes or exposing network topology.
Protocol mechanics & network logic
The execution engine processes input tokens and applies transformations in the browser sandbox. Specifically, Enter a suffix such as .dev, a Unicode label or part of a registry manager name. Search ignores case and one leading dot. Filter by IANA type and delegation-list membership; browse 50 results per page. Clear the search to browse every entry.
Worked network diagnostic scenario
Scenario: IANA Offline TLD Directory
Sample input:
Illustrative output:
Addressing limits & protocol boundaries
Operational constraints and validation boundaries: Snapshot from 2026-10-03: 1595 IANA database entries, of which 1437 appear in the dated delegated-TLD list. Entries absent from that list are not presented as currently delegated. This is not a live DNS, availability or registration-policy check. WHOIS servers, DNSSEC status, second-level IDN policies and legacy/new/brand classifications are not included.
Addressing calculations and subnet models in IANA Offline TLD Directory follow IETF RFC definitions. Ensure subnet masks and CIDR prefixes match your network topology.
Offline network inspection boundary
Address parsing and CIDR calculations in IANA Offline TLD Directory run entirely client-side without probing external IP networks or transmitting routing data.
IETF RFC specifications & IANA registries
IETF Request for Comments (RFC) standards and IANA registry references:
- Implementation-specific browser utility or reference guide (no single governing external standard)
IANA Offline TLD Directory verification · Audit standards
How to use it
- Enter, paste, or select your input data into the IANA Offline TLD Directory workspace controls.
- Review parameter fields, units, or options configured for IANA Offline TLD Directory.
- Click the action button or observe immediate live calculations rendered by IANA Offline TLD Directory.
Frequently asked questions
What can I search?+
Enter a suffix such as .dev, a Unicode label or part of a registry manager name.
What does delegated mean here?+
Delegated means present in the IANA alpha list at the recorded version; it does not mean registrable, available or unrestricted. The database also keeps entries outside that list. Unicode and xn-- forms identify the TLD label only. They do not establish which Unicode names a registry accepts below it.
Does this check registration rules or DNSSEC?+
Snapshot from 2026-10-03: 1595 IANA database entries, of which 1437 appear in the dated delegated-TLD list.
What does the .dev example show?+
Security isolation for "What does the .dev example show?" ensures zero transmission beyond your local workstation.