Question
How do I check if a site has a cdn?
Answer
In order to check if AWS Cloudfront (CDN) is being used, just look for an x-cache response header. It will say have a mention of the Cloudfront (ie. Hit from Cloudfront or Miss from Cloudfront).
Example:

1) To view this go to the web-page and right click -> Inspect (or hit f12)

2) Select the Network tab

3) If the main page isn't there, refresh the page

4) Select the page you want to check
