WHOIS is a protocol which makes it simple to see the details a particular domain name has been registered with through a command line or with the help of special web-based lookup websites. This info includes the names, address and e-mail address of the owner, admin, tech and billing persons in addition to the registrar company the domain address has been obtained through, the creation and expiration dates. Except for some country-code TLDs that have certain limitations, the WHOIS details of any Internet domain can be modified freely anytime, which is quite important provided that based on the policies of the top-level Internet Corporation, ICANN, all details must be current and valid always. Failure to comply with these policies may lead to losing the ownership of an Internet domain and in many cases a domain may even be removed from the Domain Name System and released for free registration.