The WHOIS information of a domain is a collection of a variety of details that are publicly accessed via special lookup Internet sites or a command line. The protocol that makes this possible has the same name and you could easily see the firm through which a domain name has been registered, the creation, expiration and last update dates together with the names, postal and email address of the people listed as Registrant (owner), Administrative, Technical and Billing contacts for a specific domain. All this info should be legitimate and up-to-date constantly; otherwise the domain name registration could be challenged. The latter is a policy of ICANN (the Internet Corporation for Assigned Names and Numbers), this means you must always make certain that the WHOIS details of your domains are legitimate. Updating the WHOIS for numerous country-code TLDs is limited, so when you register a completely new Internet domain, you should double-check the information that you are submitting.