Free Tools
IP Address WHOIS
This IP address WHOIS tool will display contact and registration information related to an IP address. This information includes: which organization is reponsible for allocating the IP address, if the IP address is currently allocated, and contact information (such as name and address) for the owner of an IP address.
This information is frequently used to find contact information for reporting abuse, such as spam or hacking, or for tracking down network issues.