dnsviewcli

1. create bash script

2. fill it with this script >

#!/usr/bin/bash
domain=$1
email=$(whois $domain | grep "Registrant Email" | egrep -ho "[[:graph:]]+@[[:graph:]]+")
curl -s -A "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_10_5) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/45.0.2454.85 Safari/537.36" 
"https://viewdns.info/reversewhois/?q=$email" | html2text | grep -Po "[-a-zA-Z0-9@:%._\+~#=]{1,256}\.[a-zA-Z0-9()]{1,6}\b([-a-zA-Z0-9()@:%_\+.~#?&//=]*)" | tail -n +4  | head -n -1

3. install this requirement > sudo apt-get install html2text

4. to use this script run this > bash viewdns.sh target.com