The WHOIS info of an domain is a collection of many details that are openly accessed using special lookup sites or a command line. The protocol which makes this possible has the same name and you may effortlessly see the company through which a domain name has been registered, the creation, expiration and last update dates together with the names, postal and e-mail address of those listed as Registrant (owner), Administrative, Technical and Billing contacts for a particular domain. All this info must be correct and up-to-date all the time; if not the domain registration can 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 whenever you register a new domain name, you should double-check the information you are submitting.