WHOIS is a protocol that makes it possible to see the info a particular domain has been registered with either through a command line or through the use of special web-based lookup websites. This information includes the names, address and e-mail address of the owner, admin, technical and billing persons as well as the registrar company the domain has been purchased through, the creation and expiration dates. Except for several country-code TLDs that have specific limitations, the WHOIS information of any domain name can be modified freely whenever you want, which is quite important provided that in line with the policies of the top-level Internet Corporation, ICANN, all details have to be current and correct at all times. Inability to comply with these policies may result in losing the ownership of a domain address and in many cases a domain could even be deleted from the Domain Name System and released for free registration.