The WHOIS information of an domain name is a collection of numerous details that are openly accessed using special lookup Internet sites or a command line. The protocol that makes this possible carries the same name and you could effortlessly see the company through which a domain name has been registered, the creation, expiration and last update dates in addition to the names, postal and email address of the people listed as Registrant (owner), Administrative, Technical and Billing contacts for a particular domain. All of this info ought to be valid and up-to-date constantly; if it's not the domain registration may be challenged. The latter is a policy of ICANN (the Internet Corporation for Assigned Names and Numbers), therefore you should always ensure that the WHOIS details of your domain names are legitimate. Updating the WHOIS for several country-code TLDs is limited, so whenever you register a completely new domain address, you ought to double-check the info you're submitting.