.cs
| Introduced | ca. 1990 |
|---|---|
| TLD type | Country code top-level domain |
| Status | Discontinued |
| Registry | None |
| Sponsoring organization | None |
| Intended use | Entities connected with Czechoslovakia (originally) or Serbia and Montenegro (currently) |
| Actual use | Was fairly heavily used in Czechoslovakia until discontinued in favor of .cz and .sk; may be used in the future for Serbia and Montenegro |
| Registration restrictions | No registrations are now taking place |
| Structure | Not in root |
| Documents | |
| Dispute policies | None |
| Web site | None |
.cs was for several years the country code top-level domain (ccTLD) for Czechoslovakia. However, the country split into the Czech Republic and Slovakia in 1993, and the two new countries were soon assigned their own ccTLDs: .cz and .sk respectively. The use of .cs was gradually phased out, and the ccTLD was deleted some time around January 1995.
.cs is the most heavily used top-level domain ever to be deleted. Statistics from the RIPE Network Coordination Centre show that even in June 1994, after much of the conversion to .cz and .sk had been done, .cs still had over 2,300 hosts. By comparison, other deleted TLDs (.nato and .zr) may never have reached double figures.
CS is now the ISO 3166-1 code for Serbia and Montenegro, which, however, continues to use .yu as its ccTLD. The IANA has .cs reserved for Serbia and Montenegro, with no sponsoring organizations assigned.
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