The WHOIS information of a domain is a collection of a number of details that are publicly accessed via special lookup websites or a command line. The protocol that makes this possible carries the same name and you can effortlessly see the firm through which a domain name has been registered, the creation, expiration and last update dates along with the names, postal and e-mail address of the people listed as Registrant (owner), Administrative, Technical and Billing contacts for a specific domain. All of this information should be legitimate and up-to-date constantly; if not the domain address registration could be challenged. The latter is a policy of ICANN (the Internet Corporation for Assigned Names and Numbers), this means you must always ensure that the WHOIS details of your domain names are legitimate. Updating the WHOIS for a variety of country-code TLDs is limited, so any time you register a brand new Internet domain, make sure you double-check the information you're submitting.