link writes:  

NSLookup Module for php-nuke allows webmaster to add a valuable domain to ip lookup tool to their website in seconds. The tool performs the same functions that the windows dos version does. Just type in a domain and hit go. The module will perform an nslookup and resolve the ip. It comes with built in domain verification (it can tell if users are typing in junk and not real domains) for a bit more security. So download the NSLookup Module here see a lookup demo of the module. Module is powered by 1nslookup.com