Registrant , registrar, registry , reseller, extension and so on. The world of domain names has its own jargon. But what do all those words mean?
A registry is the body that manages all the domain names in a given extension. DNS Belgium is the authority for .be, .vlaanderen and .brussels. The main task of a registry is to prevent that a certain name is registered twice. You can find the full description of DNS Belgium here.
The last part of the domain name. For the domain name dnsbelgium.be the .be is the extension of the domain name.
A registrar is a company where you can register domain names. They do this directly with the registry. For this purpose, the registrar has to apply for a licence or an accreditation with the registry for each extension. These registrars often also offer other services such as web and e-mail hosting or other internet-related services.
Not all companies that sell domain names have their own accreditation. However, you can approach them for domain names and related products. They act as a reseller for a directly accredited registrar. A company can be both a registrar and a reseller. It is then registrar for those extensions for which it has its own accreditation and reseller for the other extensions it sells.
A registrant is the holder or owner of a domain name. This can be either a company or an organisation. Private individuals can also register a domain name in their own name.