The so-called WHOIS details of any registered domain name contain information about the registrar firm, the registration and expiration dates, plus the names, phone number, postal address and email address of the owner, the administrator and the tech/billing person. WHOIS is a specific protocol that lets you get this information either through a command line or by using one of the many sites that provide WHOIS lookup services. All information must be up-to-date in line with the policies of ICANN, the Internet Corporation for Assigned Names and Numbers. If some of the information is not correct, the domain name could be reported and the result might be its deletion or losing its ownership. Some country-specific domain address extensions have certain limitations concerning the editing of their WHOIS information, but in the general situation any detail can be changed freely and at any time. Such an adjustment will appear on lookup sites within 1 day.