~$ bash network_ip_isp.sh

	public_ip: 112.64.13.68    done.
	{
	  "ip": "112.64.13.68",
	  "city": "Shanghai",
	  "region": "Shanghai",
	  "country": "CN",
	  "loc": "31.2222,121.4581",
	  "org": "AS17621 China Unicom Shanghai network",
	  "postal": "200000",
	  "timezone": "Asia/Shanghai",
	  "readme": "https://ipinfo.io/missingauth"

~$ cat network_ip_isp.sh

#!/bin/bash
public_ip=$(curl -s ifconfig.me)
echo "public_ip: $public_ip    done."
curl ipinfo.io/$public_ip/json