The WordPress WHOIS plug-in from Tribulant.com gives your users an ability to use a built-in WHOIS search form within your site. You can include the plug-in  in any location and can have users get contact and registrant/registrar  information on domain names with different extensions. You can also easily add a  new TLD or an extension to the list of TLD’s. The Plug-in works with WordPress 3.3 and higher and is cross browser compatible.

The Ajax based search form allows users to search for a domain and fetch the result while being in the same page. To filter out spam and automated submissions you can also include a Captcha image or a human equation. The plug-in is also customizable and allows you to change the graphic elements as per your requirement. The list of TLD’S (Extensions) can also be sorted as per prominence.

Support:

The WordPress WHOIS plugin comes with included documentation and video tutorials. You can also submit a trouble ticket and can also have access to a dedicated support forum . It can be inserted as a sidebar widget and suits sites related to domain registration, hosting, online advertising etc.

Price: The WHOIS plug-in from Tribulant is priced at $18.99 for a single domain and $94.95 for use in unlimited domains.