下面速度较快排行
http://city.ip138.com/ip2city.asp
http://1212.ip138.com/ic.asp
http://www.taobao.com/help/getip.php
http://pv.sohu.com/cityjson
http://ip.t086.com/getip.php
http://ip.xianhua.com.cn/
http://ip.360.cn/IPShare/info
http://whois.pconline.com.cn/
其他接口
http://www.ip.cn/
http://www.ip100.com.cn/
http://www.whatismyip.com.tw/
http://myip.com.tw/
http://ip.chemdrug.com/
http://ip.chinaz.com/
http://www.ip508.com/ip http://www.cz88.net/ip/default.aspx
http://www.123cha.com/ip/
http://int.dpool.sina.com.cn/iplookup/iplookup.php?format=js&ip