The WHOIS info of an domain is a collection of many details which are freely accessed through specific lookup sites or a command line. The protocol that makes this possible carries the same name and you may effortlessly see the organization where a domain address has been registered, the creation, expiration and last update dates as well as the names, postal and email address of those listed as Registrant (owner), Administrative, Technical and Billing contacts for a specific Internet domain. This info should be legitimate and up-to-date all the time; if it's not the domain name registration could be challenged. The latter is a policy of ICANN (the Internet Corporation for Assigned Names and Numbers), therefore you must always ensure that the WHOIS details of your domains are legitimate. Updating the WHOIS for a variety of country-code TLDs is limited, so whenever you register a completely new Internet domain, you ought to double-check the info you're submitting.