The so-called WHOIS details of any registered domain include information about the registrar company, the registration and expiration dates, and also 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 through a command line or via one of the numerous sites which provide WHOIS lookup services. All info must be up-to-date as per the policies of ICANN, the Internet Corporation for Assigned Names and Numbers. If some of the information is not accurate, the domain name may be reported and the result might be its deletion or losing its ownership. A few country-specific domain extensions have certain limitations for the change of their WHOIS info, but in the general case any detail can be modified easily and at any time. Such an adjustment will show up on lookup websites within a day.