Domain name registrar

organization or commercial entity that manages the reservation of Internet domain names

A company designed to provide domain registration service to other companies or individuals that would like to own a particular web address. The party seeking to register the site will usually pay the domain name registrar a flat or monthly fee to keep the name registered, so that no other person is able to acquire the web address. The systems setup by the domain name registrar translates IP addresses into easily identifiable domain names. this is called the domain name registrar.