The WHOIS info of an domain is a collection of numerous details which are publicly accessed via specific lookup Internet sites or a command line. The protocol that makes this possible carries the same name and you can very easily see the firm where an Internet domain has been registered, the creation, expiration and last update dates together with the names, postal and email address of those listed as Registrant (owner), Administrative, Technical and Billing contacts for a specific domain address. This information must be valid and up-to-date at all times; if it's not the Internet domain registration may 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 numerous country-code TLDs is limited, so any time you register a brand new domain name, you ought to double-check the info you are submitting.