WHOIS is a protocol that makes it possible to view the information a given domain has been registered with through a command line or using special web-based lookup sites. This info includes the names, address and e-mail address of the owner, admin, technical and billing persons plus the registrar company the Internet domain has been obtained through, the creation and expiration dates. Except for several country-code TLDs that have certain limitations, the WHOIS information of any domain address can be changed freely whenever you want, which is quite vital provided that in accordance with the policies of the top-level Internet Corporation, ICANN, all details have to be current and legitimate always. Failing to comply with these policies could lead to losing the ownership of an Internet domain and in many cases a domain name may even be deleted from the Domain Name System and released for free registration.