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#满足了一下自己的搜集癖，搜集了不少可以用来查询外网IP的网址和方法。


#国内某网站的接口，只返回IP
curl ip.6655.com/ip.aspx
curl whatismyip.akamai.com
#更多用法访问ifconfig.co
wget -qO - ifconfig.co

curl icanhazip.com
dig +short myip.opendns.com @resolver1.opendns.com

curl ident.me
curl v4.ident.me
curl v6.ident.me
#慢
curl curlmyip.com 
curl ifconfig.me
curl inet-ip.info


#返回IP和地区
curl ip.6655.com/ip.aspx?area=1
curl ip.cn
curl cip.cc


#需要翻x墙，只返回IP
curl ip.appspot.com

#参考 http://unix.stackexchange.com/questions/22615/how-can-i-get-my-external-ip-address-in-bash
#有人给了以下测试方法

wget https://raw.githubusercontent.com/rsp/scripts/master/externalip-benchmark
chmod a+x externalip-benchmark
./externalip-benchmark

#返回JSON格式的数据

C:\>curl httpbin.org/get
{
  "args": {},
  "headers": {
    "Accept": "*/*",
    "Host": "httpbin.org",
    "User-Agent": "curl/7.28.1"
  },
  "origin": "222.216.164.78",
  "url": "http://httpbin.org/get"
}

C:\>curl httpbin.org/ip
{
  "origin": "116.11.199.77"
}