GIPC
Geographical IP Correlation
...The exe requires 2 inputs: The IP file (one IP per line) MaxMind GeoCity database – This can be downloaded HERE:http://geolite.maxmind.com/download/geoip/database/GeoLiteCity.dat.gz
Please read more on my blog: http://jcsocal.blogspot.com/2013/03/geographical-ip-correlation-tool.html