WHOIS is a protocol which makes it easy to see the info a given domain name has been registered with 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, technical and billing persons in addition to the registrar organization the Internet domain has been acquired through, the creation and expiration dates. Aside from a few country-code TLDs that have specific limitations, the WHOIS information of any domain name can be changed freely at any time, which is quite important provided that in accordance with the policies of the top-level Internet Corporation, ICANN, all details ought to be current and correct all of the time. Failure to comply with these policies could lead to losing the ownership of a domain and in some cases a domain address may even be deleted from the Domain Name System and released for free registration.