What Is A Registrar

What is a Registrar? - Basic

A company that sells domain names.
 

What is a Registrar? - Detailed

A domain name registrar is the organization or company responsible for providing domain name registration services to the public. A registrar registers, manages, and keeps track of domain names.

Domain name registrars are authorized by ICANN to register domain names within a specific ccTLD (country code Top Level Domain name extension).

A registrar must also be authorized by the registry of a Top Level Domain to act as an agent of the registry to process domain name registrations. The registrar is also responsible for creating and maintaining a WHOIS database for its customers.