Karen's WhoIs allows you to query domain registration and IP address allocation records from registries around the world.
It is capable of performing queries for the 200+ top-level domain registries around the world and returns information about those internet sites. The information Karen's WhoIs makes available includes the owner of a domain name, and often the owner's mailing address, email address, phone number, and fax number.
Karen's WhoIs is displayed from a simple interface that allows efficient utilization without unneeded clutter. You can look up either by domain or IP address both of which includes a drop-down menu for server selection.