<p>The DomainTools Whois plugin will automatically link domain names in a WordPress page or blog post to the DomainTools Whois service. It also generates a pop-up containing a summary of Whois information that your visitors can see without leaving your site.</p>


DomainTools Whois Plugin

DomainTools whois plugin shows whois data for domains found in blog articles and links them to whois.domaintools.com.

nullamatix.com

<p>IP Intelligence provides the ability to retrieve information about commentators IP from within the WordPress admin section.</p>
<h4>Feature Summary</h4>
<ul>
<li>Reverse DNS/PTR</li>
<li>Long/Proper IPv4 Format</li>
<li>Country of Origin (ipinfodb.com)</li>
<li>Region or State (ipinfodb.com)</li>
<li>City (ipinfodb.com)</li>
<li>Timezone (ipinfodb.com)</li>
<li>Spamcop.net Status</li>
<li>StopForumSpam.com Data</li>
<li>Whois Detail (whois.net)</li>
</ul>
<h4>Further Analysis</h4>
<p>The plugin also provides targeted/dynamic links to the following destinations for further research:</p>
<ul>
<li>Google Search Query</li>
<li>Google Groups Search Query</li>
<li>Project HoneyPot</li>
<li>Spamhaus</li>
<li>OpenRBL</li>
<li>Robtex (Lucky)</li>
</ul>


IP Intelligence

I am amazed ipinfodb still recommends this plugin.



super old, not updated for 7 years

Provides the ability to retrieve information on a commentators IP address without leaving the "edit-comments.php" page.

DomainTools Whois Plugin vs IP Intelligence