Few months back there was a post on finding the IP address of the sender of an email. Once you get to know the IP address, what will you do next? There are many websites which can help you in finding the information of an IP address, but nothing comes close to IPNetInfo. It is a free tool for Windows which helps you in finding the complete details of an IP address instantly.
This tool has one advantage, if you receive an unsolicited email you can copy the message headers from your email software and paste them in this tool. It will automatically find all IP addresses and display their information in an easy-to-use window.
It works by searching all whois records about this IP address from different sources. It is compatible with all versions of Windows. Enjoy!