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