WHOIS is a protocol which makes it possible to see the details a particular domain has been registered with through a command line or by using special web-based lookup sites. This information includes the names, address and email address of the owner, admin, tech and billing persons plus the registrar organization the domain name has been acquired through, the creation and expiration dates. With the exception of several country-code TLDs that have specific limitations, the WHOIS info of any Internet domain can be changed freely whenever you want, which is quite important given that based on the policies of the top-level Internet Corporation, ICANN, all details must be current and valid all of the time. Failure to comply with these policies may lead to losing the ownership of a domain address and in many cases a domain might even be deleted from the Domain Name System and released for free registration.