Free IP address to ASN database - API iptoasn.com

get-asn.sh

#!/bin/bash
IP2=$1

IP=${IP2:-$(echo $(($RANDOM % 256)) $(($RANDOM % 256)) $(($RANDOM % 256)) $(($RANDOM % 256)) | sed 's/ /./g')}

if [[ "$IP" =~ ^(([1-9]?[0-9]|1[0-9][0-9]|2([0-4][0-9]|5[0-5]))\.){3}([1-9]?[0-9]|1[0-9][0-9]|2([0-4][0-9]|5[0-5]))$ ]]; then
    echo -n "$IP: "
	  curl https://api.iptoasn.com/v1/as/ip/${IP} -s |  grep -Eo '\"as_number\"(.+?)([0-9]),' | grep -Eo '[0-9]+'
  	# curl https://api.iptoasn.com/v1/as/ip/${IP} -s | sed 's/,/ /g;s/\"//g' | grep -Eo 'as_number.*'  | awk {'print $1'} | cut -d':' -f2
else
  echo "$IP: Invaild."
fi