This tool finds and locates points of presence of CDNs only using a single machine.
It leverages EDNS0 options to force DNS servers to give away all possible server client mappings.
- Amazon Cloudfront
Google PoPs using 20% public IPs.
Amazon Cloudfront using 25% public IPs.
Here is the locations of Cloudfront PoPs (lower) compared with the map from cdnplanet (upper).