GeekTools Whois Proxy
This whois tool will automatically query the correct registry, and return all of the data it can find. For example, if you enter www.geektools.com, it will find that there is only a record for geektools.com, not www.geektools.com, and will return that data. If you enter www.cisco.co.uk, it will find the data for cisco.co.uk, and return it. If you enter an ip address, it will return the ARIN record for the address, or if the address is assigned to RIPE or APNIC, it will return the RIPE or APNIC record. For example, a search for 18.104.22.168 will return the RIPE record for www.bayer.dk. It can be run as both command line and CGI.