在一些嵌入式设备，在使用了４G拨号以后，需要知道自己设备的对外IP，采用以下几种方法可以轻松获得。

方法一：　

1) get http://ipinfo.io/ip

   response: {"clientIP":"124.129.11.204"}

   or   GET http://ifconfig.me/ip 

GET http://ipinfo.io/ip

 GET https://ifconfig.co/ip

GET http://ip.renfei.net

2) 获取我的城市　

　　ＧＥＴ http://ip.taobao.com/outGetIpInfo?ip=124.129.11.204&accessKey=alibaba-inc

　　ＲＥＳＰ：　

　　　{"data":{"area":"","country":"中国","isp_id":"100026","queryIp":"124.129.11.204","city":"青岛","ip":"124.129.11.204","isp":"联通","county":"","region_id":"370000","area_id":"","county_id":null,"region":"山东","country_id":"CN","city_id":"370200"},"msg":"query success","code":0}

方法二：搜狐IP地位　

　　　ＧＥＴ　http://pv.sohu.com/cityjson?ie=utf-8

　　　 RESP:

var returnCitySN = {"cip": "124.129.11.204", "cid": "370200", "cname": "山东省青岛市"};

方法三：高德地图IP定位，设备需要支持ＨＴＴＰＳ

　　　ＧＥＴ　https://lbs.amap.com/api/webservice/guide/api/ipconfig/