WHOIS is a protocol that makes it possible to see the details a particular domain has been registered with either through a command line or using special web-based lookup sites. This information includes the names, address and email address of the owner, admin, tech and billing persons as well as the registrar company the domain address has been acquired through, the creation and expiration dates. Aside from some country-code TLDs that have specific limitations, the WHOIS details of any domain name can be edited freely whenever you want, which is quite important considering that based on the policies of the top-level Internet Corporation, ICANN, all details ought to be current and valid at all times. Inability to conform with these policies could lead to losing the ownership of an Internet domain and in many cases a domain could even be deleted from the Domain Name System and released for free registration.