This package wraps the libgeoip C library for access from Go (golang). 
Install with go get github.com/abh/geoip and use godoc geoip to read the documentation.
There's a small example in the ex/ subdirectory.
You can download the free GeoLite Country database or you can subscribe to updates.
file := "/usr/share/GeoIP/GeoIP.dat" gi, err := geoip.Open(file) if err != nil { fmt.Printf("Could not open GeoIP database\n") } if gi != nil { country, netmask := gi.GetCountry("207.171.7.51") } // Setup gi6 by opening the optional IPv6 database and then... country := gi6.GetCountry_v6("2607:f238:2::5") fmt.Println(country) Copyright 2012-2013 Ask Bjørn Hansen ask@develooper.com. The package is MIT licensed, see the LICENSE file. Originally based on example code from blasux@blasux.ru.