The WHOIS information of a domain name is a collection of a number of details that are freely accessed via specific lookup Internet sites or a command line. The protocol which makes this possible has the same name and you can very easily see the firm where a domain address has been registered, the creation, expiration and last update dates as well as the names, postal and e-mail address of those 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 Internet domain registration can be challenged. The latter is a policy of ICANN (the Internet Corporation for Assigned Names and Numbers), this means you should always make certain that the WHOIS details of your domain names are accurate. Updating the WHOIS for several country-code TLDs is limited, so when you register a brand new Internet domain, you should double-check the information you are submitting.