4umi.com/web/bookmarklet/whois

Whois Source

Whois uk specializes in .uk domain names.

Dutch: Whois nl zoekt in de database van de Stichting Internet Domeinregistratie Nederland.

Click any of the above links to see the bookmarklet script in action. It will load a new page with display whois information, information on the owner of the website.

To make this work on pages throughout the www, right-click on the link and choose Add to Favorites... from the pop-up menu (or the equivalent on non-Windows machines). You can also directly drag the link into your Links bar or Favorites menu. When a security question pops up, simply answer 'Yes'. The code is then integrated in your browser. Now, wherever you are on the web, you can click the bookmarklet to see who owns the website, and since when, and how you can contact them.