WHOIS is a protocol which makes it an easy task to view the information a specific domain name has been registered with either through a command line or with the help of special web-based lookup sites. This info includes the names, address and email address of the owner, administrator, tech and billing persons as well as the registrar business the domain address has been purchased through, the creation and expiration dates. Apart from a number of 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 since based on the policies of the top-level Internet Corporation, ICANN, all details ought to be current and correct always. Inability to comply with these policies could lead to losing the ownership of a domain and in many cases a domain address might even be deleted from the Domain Name System and released for free registration.