ip2c (ip to country) is a free program that is able to determine the country associated to a specific IP address. It queries the five main whois servers responsible for each region of the world and try to automatically establish the most authoritative for the IP specified.
Then it return the country’s two-letter TLD (for example US), the extended country name (for example United States of America), its world region (for example North America) and a string containing a brief description of the organization managing the block of IP addresses containing the submitted IP (when available).
The program has a feature that I really think is useful: it 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. Thus, when you have several (maybe hundreds) IP addresses that you need to check you don’t need to do it manually.
Important warning from the creator: ip2c is not a substitute for the offline databases offered by many geolocation commercial services. If you use the batch mode you must NOT abuse the server. If you commit abuse you can be slowed down, banned for 24 hours, or permanently.
[ip2c]
