The WHOIS info of a domain name is a collection of various details that are openly accessed via specific lookup websites or a command line. The protocol which makes this possible has the same name and you can very easily see the company where an Internet domain has been registered, the creation, expiration and last update dates together with the names, postal and e-mail address of the individuals listed as Registrant (owner), Administrative, Technical and Billing contacts for a specific domain address. All of this info must be legitimate and up-to-date at all times; otherwise the domain registration may be challenged. The latter is a policy of ICANN (the Internet Corporation for Assigned Names and Numbers), therefore you should always make certain that the WHOIS details of your domain names are valid. Updating the WHOIS for numerous country-code TLDs is limited, so when you register a brand new domain address, you ought to double-check the information you are submitting.