The so-called WHOIS details of every single registered domain name contain details about the registrar organization, the registration and expiration dates, along with the names, phone number, postal address and e-mail address of the owner, the administrator and the tech/billing person. WHOIS is a specific protocol that allows you to get all this information through a command line or via one of the numerous sites which provide WHOIS lookup services. All information must be up-to-date in line with the rules of ICANN, the Internet Corporation for Assigned Names and Numbers. If some of the details are not legitimate, the domain name might be reported and the result might be its deletion or losing its ownership. A number of country-specific domain extensions have specific limitations for the change of their WHOIS details, but in the typical scenario any detail can be modified openly and at any time. Such an adjustment will show up on lookup Internet sites within twenty four hours.