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The Second Level Domain

The Second Level Domain is managed by Nominet UK and is limited to the registration of Third Level Domains for Internet Service Providers.

Decisions on name requests in the Second Level Domain are made by Nominet UK.

Specifically, Nominet UK must be satisfied that the applicant for a Third Level Domain Name within the Second Level Domain meets each of the following criteria:

  • The applicant is an Internet Service Provider

  • The applicant is either:

    • a company listed on the Register of Companies at Companies House under the Companies Act 1985 in the Great Britain or on the Register of Companies at the Northern Ireland Companies Registry under the Companies (Northern Ireland) Order 1986.


    • a United Kingdom government department, local government body, or associated government funded organisation


    • a recognised academic institution geographically located in the United Kingdom


    • a Charity on the Register of Charities at the Charity Commission in the United Kingdom.

  • The applicant either:

    • be listed as a local IP address registry with a regional IP address registry.


    • have an Autonomous System containing hosts in the United Kingdom that is listed with a regional IP address registry and that is continuously reachable from major Internet exchange points.

  • The requested domain name is the same as or a reasonable variant of the applicant's name.

  • The applicant will use the domain in conformance with the RFC 1591 guidelines for NET domains.


    This domain is intended to hold only the computers of network providers, that is the NIC and NOC computers, the administrative computers, and the network node computers. The customers of the network provider would have domain names of their own (not in the NET TLD).

  • The registrant will not use the domain for any service they provide on behalf of any other entity, eg the domain name may not appear in customer e-mail addresses or URLs.

How to register an organisation in the Second Level Domain.

All requests for names in Second Level Domain are submitted in the same manner as requests for Domain Names in the Second Level Domain, ie members of Nominet UK submit requests to using the Automaton. Non-members should contact Nominet UK.