.co.uk domain lookup
Second-level extension under .uk; registrations are held by the .uk registry.
The most common commercial second-level domain in the United Kingdom, run by Nominet.
Technical details
- Type
- SLD · ccTLD
- Registry
- Nominet UK
- WHOIS server (port 43)
- whois.nic.uk
- RDAP endpoint
- https://rdap.nominet.uk/uk/
- Added to the root zone (.uk)
- Jul 24, 1985
- IANA record last changed (.uk)
- Aug 4, 2026
IANA data: Oct 6, 2026
What does the registry publish?
Based on the record of google.co.uk (RDAP, Oct 6, 2026):
- Registrar: published
- Creation date: published
- Last update: published
- Expiry date: published
- Status codes: published
- Name servers: published
- DNSSEC: published
- Registrant: not published
- Abuse contact: published
The registrant's personal data is redacted.
Status codes in the sample record
- serverDeleteProhibited
- serverTransferProhibited
- serverUpdateProhibited
What happens when a domain expires?
For country code extensions the periods depend on the registry. See the .uk registry's rules for exact durations.
Questions about .co.uk
›What is the .co.uk whois server?
The port 43 WHOIS server for .co.uk is whois.nic.uk.
›Does .co.uk support RDAP?
Yes. RDAP endpoint: https://rdap.nominet.uk/uk/
›How do I find when a .co.uk domain expires?
Type the domain in the box above; if the registry publishes the expiry date, the whois card shows it along with the days left.
›Can I see who owns a .co.uk domain?
Usually not: according to our sample check this registry redacts the registrant's personal data. The registrar and dates are still visible.