The so-called WHOIS details of each registered domain name contain information about the registrar company, 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 enables you to retrieve this info either through a command line or via one of the many Internet websites that offer WHOIS lookup services. All contact details must be up-to-date in accordance with the policies of ICANN, the Internet Corporation for Assigned Names and Numbers. If some of the information is not legitimate, the domain name might be reported and the result could be its deletion or losing its ownership. A number of country-specific internet domain extensions have specific limitations in connection with the modification of their WHOIS info, but in the general situation any detail can be edited openly and at any time. Such a change will appear on lookup Internet sites within a day.