Are you sure Amazon is responsible? I mainly see Akamai as a CDN here. But maybe it's different, depending on the source IP address...
Aeh! s/Amazon/Akamai/ sorry!
For Akamai, this may be of interest: https://www.akamai.com/us/en/clientrep-lookup/
I stumbled over this page, but discarded as I could not enter the affected IP.
I'm now sent the link to the affected customer. Let's see if he is getting any result.
Mit freundlichen Grüssen
-Benoît Panizzon-