http://erichelgeson.github.io/blog/2013/12/31/i-fought-my-isps-bad-behavior-and-won/

Obtenha o-1m.csv de Alexa http://www.alexa.com/topsites (lado direito da página)

for i in `head -n 1000 top-1m.csv | cut -f2 -d,`; do
  echo "Site: $i";
  diff <(curl --ipv4 -s -v --dns-servers 66.x.x.4,66.x.x.4 --url http://$i/ 2>&1 | grep -v "0x" | grep -v "Date: ") <(curl --ipv4 -s -v --dns-servers 8.8.8.8,8.8.4.4 --url http://$i/ 2>&1 | grep -v "0x" | grep -v "Date: ");
done > 1000.diff.txt