.uk
| Introduced | 24 July 1985 |
|---|---|
| TLD type | Country code top-level domain |
| Status | Active |
| Registry | Nominet UK |
| Sponsor | Nominet UK |
| Intended use | Entities connected with the United Kingdom |
| Actual use | Very popular in the United Kingdom |
| Registered domains | 10,508,932 (9,314,572 third level and 1,374,360 second level) (January 2024) |
| Registration restrictions | No general restrictions. Some second-level domains have specific restrictions. |
| Structure |
|
| Dispute policies | .UK Domain Disputes |
| DNSSEC | yes |
| Registry website | theukdomain |
.uk is the Internet country code top-level domain (ccTLD) for the United Kingdom. It was first registered in July 1985, seven months after the original generic top-level domains such as .com and the first country code after .us.
As of April 2021, it is the fifth most popular top-level domain worldwide (after .com, .cn, .de and .net), with over 10 million registrations.
.uk has used OpenDNSSEC since March 2010.