gTLD Query Tools

WHOIS

Domain name lookup tools for each TLD are available at whois.nic.“TLD” or port 80 for the web WHOIS and port 43 for the WHOIS.

For example, for .cymru – whois.nic.cymru

Eligibility and usage

These services are available to any individual or organisation, provided the relevant policies are followed. Access may be withdrawn at any time.

The normal acceptable uses are:

Checking the availability of a domain name
To find out the registrant’s details for a domain name that is already registered.

RDAP

Registration Data Access Protocol

Registration Data Access Protocol (RDAP) will in time replace the Whois protocol. Nominet’s RDAP service follows the following standards:

RDAP service
RFC 7480	HTTP Usage in the Registration Data Access Protocol (RDAP)
RFC 7481	Security Services for the Registration Data Access Protocol (RDAP)
RFC 7482	Registration Data Access Protocol (RDAP) Query Format	Errata
RFC 7483	JSON Responses for the Registration Data Access Protocol (RDAP)	Errata
RFC 7484	Finding the Authoritative Registration Data (RDAP) Service	Errata, Updated by RFC 8521
RFC 8056	Extensible Provisioning Protocol (EPP) and Registration Data Access Protocol (RDAP) Status Mapping
RFC 8605	vCard Format Extensions: ICANN Extensions for the Registration Data Access Protocol (RDAP)
Profile February 2019	ICANN gTLD Profile, February 2019.

More information on RDAP can be found on the ICANN web site https://www.icann.org/rdap

Nominet’s RDAP service is available at https://rdap.nominet.uk/{TLD}/{type}/{object}.

For example to query the nic.cymru domain you would use https://rdap.nominet.uk/cymru/domain/nic.cymru

Nominet