#!/usr/bin/env bash

for domain in twitter.com tosbourn.com i.ua; do	\
  google_dns=$(dig @8.8.8.8 ${domain} | awk '/msec/{print $4}')
  cloudflare_dns=$(dig @1.1.1.1 ${domain} | awk '/msec/{print $4}')
  open_dns=$(dig @208.67.222.222 ${domain} | awk '/msec/{print $4}')
  printf "${domain}\tCloudFlare DNS ${cloudflare_dns}ms\tGoogle DNS ${google_dns}ms\tOpenDNS ${open_dns}ms\n"
done