The Extinct TLD Graveyard & Digital Archaeology
Documenting the definitive history of deleted, revoked, and retired top-level domains. When nations dissolve, borders shift, or technological protocols transition, top-level domains are retired from the IANA Root Zone database.
Originally allocated to the Socialist Federal Republic of Yugoslavia in 1989. Following the Yugoslav Wars and breakup of the federation, it continued to be used by Serbia and Montenegro until ICANN approved a formal phase-out plan. Final IANA root deletion occurred on March 30, 2010.
Assigned in 1990 following the fall of communism. On January 1, 1993, the country peacefully dissolved during the Velvet Divorce into the Czech Republic and Slovakia. The TLD was phased out and removed from the root in 1993.
Allocated by IANA in 1988 for internal academic network use at Jena and Dresden universities. With German reunification on October 3, 1990, the state ceased to exist before the TLD was ever publicly delegated into the root zone.
Assigned to Zaire in 1996. Following the overthrow of Mobutu Sese Seko in May 1997, the country was officially renamed the Democratic Republic of the Congo. IANA delegated .cd in 1997 and deleted .zr in 2001.
Assigned in 1997 to Connect Ireland while the territory was under Indonesian military occupation. Following independence in 2002, the new sovereign nation of Timor-Leste adopted .tl. A 10-year grandfathering period allowed existing .tp domains to resolve until full retirement in 2015.
Administered by the University of the Netherlands Antilles. On October 10, 2010, the country was politically dissolved into constituent countries within the Kingdom of the Netherlands. The TLD was formally removed on July 31, 2015.
Created in the late 1980s by the InterNIC before the introduction of .int. When IANA Director Jon Postel established .int for international treaty-based intergovernmental organizations, NATO migrated its web presence to nato.int in 1996.
Assigned in 1997 for nine uninhabited or military-only US Pacific atolls (including Wake Island, Midway Atoll, and Johnston Atoll). Due to lack of permanent civilian population and security concerns, the registry was officially revoked in 2008.
| Pseudo-TLD | Underlying Network | Operational Era | Transport Protocol | Historical Routing Function |
|---|---|---|---|---|
| .bitnet | Because It's Time Network | 1981 - 1996 | RSCS / Store-and-Forward | Cooperative university computer network using IBM NJE protocols; required mail gateway routing into the ARPANET. |
| .uucp | Unix-to-Unix Copy | 1979 - 2000 | UUCP Dial-up Routing | Bang path routing (e.g. hostA!hostB!user) mapped into synthetic domain addresses prior to standard DNS propagation. |
| .csnet | Computer Science Network | 1981 - 1991 | Phonenet MMDF Dial-up | Funded by the US National Science Foundation (NSF) to extend academic connectivity to universities without ARPANET access. |
ISO 3166-1 Alpha-2 Dependency
Under RFC 1591 Section 4.2, IANA does not determine country definitions. When the ISO 3166-1 Maintenance Agency removes an alpha-2 country code following geopolitical dissolution, a mandatory retirement notice is issued to the contracted sponsoring organisation.
The 5 to 10 Year Transition Buffer
To prevent severe disruption to banking, telecommunications, and government infrastructure, modern ICANN ccNSO retirement policy permits a grandfathered transition window of typically 5 to 10 years, allowing registrants to migrate email routing and DNS records to the recognized successor code.
Root Zone Deletion Execution
Final retirement requires an ICANN Board Resolution directing the PTI (Public Technical Identifiers) root zone maintainer to strip the delegation NS, DS, and glue records from the root zone file, after which all recursive resolvers worldwide return NXDOMAIN.