The GeoLite Country database at: http://www.maxmind.com/app/geolitecountry http://www.maxmind.com/app/geolitecountry) is just fine for countries. The Ruby gem

The GeoLite Country database at: http://www.maxmind.com/app/geolitecountry http://www.maxmind.com/app/geolitecountry) is just fine for countries. The Ruby gem works nicely: http://blade.nagaokaut.ac.jp/cgi-bin/scat.rb/ruby/ruby-talk/140379 http://blade.nagaokaut.ac.jp/cgi-bin/scat.rb/ruby/ruby-talk/... ... and there are other APIs as well: http://www.maxmind.com/app/api http://www.maxmind.com/app/api MaxMind is the standard.