Reverse IP Whois

Reverse IP Whois represents a way to query a logical map of all IP address range suballocations. Simply enter a company or organization name and Reverse IP Whois will show you all the IP ranges belonging to that enterprise.

Why is this important? Unlike domain names, the requirements for keeping updated IP address Whois and suballocation records are poorly enforced. With Reverse IP Whois you can validate that all your current IP ranges are assigned correctly, you can map the infrastructure of competitors or other organizations, and you can discover if anyone is inappropriately assigning nefarious range delegations to your company.