1. 外网IP查询 https://www.ipify.org/
curl https://api.ipify.org
2. IP地址信息查询 https://ipapi.co/api/#specific-location-field
curl 'https://ipapi.co/125.71.129.228/json/' 返回json格式所有数据
curl 'https://ipapi.co/125.71.129.228/city' 返回city一项数据
curl 'https://ipapi.co/json' 获取当前客户IP及信息
https://ipapi.co/ip 当前客户IP
https://ipapi.cn/city 当前客户IP所在城市
3. IP地址信息查询 curl https://ipsidekick.com/17.142.160.59
4. IP地址信息查询 curl https://ipvigilante.com/125.71.129.228
5. http://myexternalip.com/raw