This utility will analyse a block of text (usually e-mail headers) and provide information about any IP addresses it may contain. The report identifies the probable country for each IP, and gives you easy access to an ARIN Whois record and any Google Groups hits for the IP.
Submit a Set of Headers or list of IPs
Tips
Paste the entire header block from your e-mail. The utility will extract the IP addresses for you
Enter individual IP addresses or multiple ones (separated by spaces, commas, or carriage returns) to get a quick report
Some webmail clients don't record the sender's originating IP, so sometimes the report won't show you the true country of origin
Local network IPs (e.g., 127.0.0.1 or 192.168.1.11) are ignored as they are not meaningful for the report.