Do you want to know if a website is running on EC2? Use this tool to figure it out quickly.
For the domain flights.cz.cc, I found the following IP addresses:
74.125.113.121 - It's not running on EC2 - PTR points to vw-in-f121.1e100.net
Some EC2 sites: Some surprising sites that aren't running EC2:
- info.rightscale.com - apparently they only eat some of their own dogfood
- www.amazonaws.com