The so-called WHOIS details of any registered domain name contain information about the registrar firm, the registration and expiration dates, and also the names, contact number, postal address and email address of the owner, the administrator and the tech/billing person. WHOIS is a specific protocol that enables you to get all of this information through a command line or by using one of the many sites that offer WHOIS lookup services. All information should be up-to-date in line with the rules of ICANN, the Internet Corporation for Assigned Names and Numbers. If some of the information is not correct, the domain address can be reported and the result could be its deletion or losing its ownership. A number of country-specific domain address extensions have specific limitations in connection with the change of their WHOIS information, but in the typical situation any detail can be modified openly and at any moment. Such a change will appear on lookup sites within twenty four hours.