| TLD type | Temporary country code top-level domain |
|---|---|
| Status | Temporary (not in root) |
| Registry | None |
| Sponsor | None |
| Intended use | Entities connected with  Kosovo |
| Registry website | None |
.xk is a temporary, unofficial country code top-level domain for Kosovo, assigned under the United Nations Security Council Resolution 1244 in 1999.[1]
XK falls under the ISO 3166-1 "alpha-2 user-assigned codes", which include AA, ZZ, QM to QZ and XA to XZ.[2] This means it is reserved for private use and will not be permanently assigned to any entity – nor used as a country code top-level domain.[3][4][failed verification] Thus, its use is unofficial and temporary, until Kosovo is assigned its own alpha-2 country code, with possible options including .ka, .ks, .kv, and .ko (although the latter may not be chosen due to its possible use for a reunified Korea, if North and South Korea's current domains, .kp and .kr respectively, are superseded).
- ^ "Kosovo - The World Factbook". The World Factbook. Retrieved 2021-04-26.
- ^ Lewis, E. (2015-03-09). "User Assigned ISO 3166-1 Alpha-2 Codes and the DNS Root Zone". Retrieved 2021-04-26.
- ^ Arends, R.; Lewis, E. (2020-06-08). "Top-level Domains for Private Internets". Ietf Datatracker. Retrieved 2021-04-26.
- ^ "Results of IANA Selection of IDNA Prefix". 2003-02-11. Retrieved 2021-04-26.
The use of ISO 3166-1 the user-assigned elements removes the possibility that the code will duplicate a present or future ccTLD code