ip2c (IP address to country) helps determine the country associated with a specific address by querying the five main WHOIS servers responsible for major world regions. The program tries to establish the most authoritative location for the IP specified and then return the country's two-letter TLD, the extended country name, its world region, and a description of the organization managing IP (when available).

The program can also process a list of IPs stored in a comma delimited file and generate a new file with the country fields added to it. The program is fast, multi-threaded, and queries all the servers in parallel to speed up the overall response time.