离线IP库

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ip2region - 准确率99.9%的离线IP地址定位库，0.0x毫秒级查询，ip2region.db数据库只有数MB，提供了java,php,c,python,nodejs,golang,c#等查询绑定和Binary,B树,内存三种查询算法。每条ip数据段都固定了格式：

城市Id|国家|区域|省份|城市|ISP_
github地址:https://github.com/lionsoul2014/ip2region