WHOIS is a protocol that makes it possible to see the details a specific domain has been registered with through a command line or through the use of special web-based lookup sites. This information includes the names, address and email address of the owner, administrator, technical and billing persons as well as the registrar business the domain has been obtained through, the creation and expiration dates. Apart from several country-code TLDs that have specific limitations, the WHOIS details of any domain address can be changed freely at any time, which is quite important considering that in accordance with the policies of the top-level Internet Corporation, ICANN, all details must be current and correct at all times. Failure to conform with these policies may lead to losing the ownership of an Internet domain and in some cases a domain name could even be removed from the Domain Name System and released for free registration.