The so-called WHOIS details of any registered domain name contain details about the registrar firm, the registration and expiration dates, along with the names, telephone number, postal address and email address of the owner, the administrator and the tech/billing person. WHOIS is a special protocol that enables you to get all this information either through a command line or using one of the numerous websites which provide WHOIS lookup services. All details should be up-to-date in accordance with the regulations of ICANN, the Internet Corporation for Assigned Names and Numbers. If some of the info is not accurate, the domain name may be reported and the result might be its removal or losing its ownership. A few country-specific domain address extensions have certain limitations for the change of their WHOIS details, but in the typical case any detail can be changed openly and at any moment. Such a modification will appear on lookup sites within 1 day.