The WHOIS info of an domain name is a collection of many details which are openly accessed through specific lookup Internet sites or a command line. The protocol which makes this possible carries the same name and you may very easily see the firm where a domain address 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 name. All of this info has to be legitimate and up-to-date at all times; otherwise the domain address registration could be challenged. The latter is a policy of ICANN (the Internet Corporation for Assigned Names and Numbers), so you should always ensure that the WHOIS details of your domain names are legitimate. Updating the WHOIS for several country-code TLDs is limited, so any time you register a new domain name, you should double-check the info you're submitting.