The Policy of registration of domain names and creations of new domain zones (domains of the first level) defines Internet Corporation for Assigned Names and Numbers (ICANN). This organization chooses and accreditation the registrar in everyone domain to zone. Still ICANN defines rules of registration and administration of domains of the second level and for what infringements of these rules registration of the domain can be . These rules depending on a domain zone slightly it is separated.

Accreditate registrars, in turn, sell services on registration of domain names of the second level to hosting service providers and to final clients: to private persons and firms. The domain name is registered for the term of not less than one year. In some domain zones the minimal limit of term registration 2 years.

Names of zones can be divided on "organizational" and "geographical". In the maximum zone the following are registered "Organizational" domain zones:

Each country (state) has the geographical (national) domain from two letters:

The question on creation of a new domain zone .eu is now studied. It domain zone will unite the countries of the Euro-Union. The idea of creation a zone .eu was born to 1997 more year. By 2002 the Eurocommission has solved, that the uniform domain zone is necessary, but procedure of registration was defined only in it to year. The manager of the European domain zone became company EURid, it is engaged in accreditation of the companies it will be entrusted to them to record domains.