This simple whois function queries an available site for IP numbers and returns the organisation owning that IP number. With a slight change of the code, other items e.g. the country can be found Code: ASP 3.0 & VBScript
You don't need any Component. You can learn who is the registrant of Domain Name with XMLHTTP. Only required install Microsoft.XMLHTTP to your server.
I adapted for <b>Brazilian Protuguese</b> Domains. Code: ASP 3.0