We have all heard how it is a good idea to use a CDN for serving static assets, but how does one go about identifying, from which POP are the resources being served from i.e. let’s assume a CDN has a POP in India, but they reserve it for higher paying clients or chose to serve some or most of the requests from elsewhere, instead of serving it locally.
We as website owners wouldn’t have any way of knowing this with standard tests, so I was wondering if it is possible to check which POP is actually serving the resources so that we can make an informed decision, instead of relying upon the marketing of CDN provider?