Gives you the 2 letter iso of the country given an ip address (based off of rubyquiz, just made it a plugin)
MIT License
通过淘宝 IP 库查询 IP 所在地域位置 http://ip.taobao.com
rails plugin to store countries as ISO codes
IP address - integer conversion, activemodel and activerecord support for ip address attributes s...
Ruby: country/language names and 2-letter-code pairs, in 85 languages, for country/language i18n
Resolution-independent country flags for your website
Lookup IP Address with API to get a lot of information using ip-api.com
ip2region 的 ruby 实现的版本
List of EU Countries, built on top of the countries gem
Detect Datacenter by IP