Looks up an IP asynchronously using the maxmind database. Be sure to install maxmind C API first and test from the command line. http://www.maxmind.com/app/c
Weekly updated database of IP CIDR to Country codes, indexed by the first 1/4th of the IP address
A RabbitMQ microservice wrapping the node-geoip package (geoip-lite on npm).
IP information service with MaxMind and ipapi.is backends