The WHOIS info of an domain is a collection of various details that are openly accessed via specific lookup Internet sites or a command line. The protocol that makes this possible carries the same name and you may easily see the company through which a domain address has been registered, the creation, expiration and last update dates as well as the names, postal and email address of the individuals listed as Registrant (owner), Administrative, Technical and Billing contacts for a particular Internet domain. All this information has to be correct and up-to-date all the time; if it's not the domain name registration may 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 domain addresses are legitimate. Updating the WHOIS for several country-code TLDs is limited, so any time you register a brand new domain, you should double-check the info that you are submitting.