Want to share a simple yet useful utility:
IPNetInfo is a small utility that allows you to easily find all available
information about an IP address: The owner of the IP address, the
country/state name, IP addresses range, contact information (address,
phone, fax, and email), and more.
This utility can be very useful for finding the origin of unsolicited
mail. You can simply copy the message headers from your email software
and paste them into IPNetInfo utility. IPNetInfo automatically extracts
all IP addresses from the message headers, and displays the information
about these IP addresses.
