IP address ranges for EC2

Question

Is there any public info on what public IP address ranges Amazon EC2 uses? I would like to be able to lookup an IP and know whether or not it's an EC2 machine. I know that the DNS name given to EC2 machines gives a hint that it's an EC2 account, but I really prefer to just have an IP lookup available.

Tx, Simon @ http://LabSlice.com

Answer 1

You can find information on the public IP ranges used by AWS here: https://ip-ranges.amazonaws.com/ip-ranges.json

See the documentation: http://docs.aws.amazon.com/general/latest/gr/aws-ip-ranges.html

Answer 2

Amazon maintains the list of EC2 IP Ranges here: https://forums.aws.amazon.com/ann.jspa?annID=1701