You can implement an API operation to view the geographic region ("geo") associated with a specific subcustomer.

This is accomplished by running the "Get a subcustomer" operation via the ACE API. You'll need the following values to run this operation:

• propertyId: This is the unique ID value associated with the base configuration that houses the target subcustomer. Contact your Account Representative for this value.
• sub-customerId: The ID associated with the subcustomer you want to view.
• network: You need to decide which network version of the subcustomer you want: production (live) or staging (testing).

Review the ACE API docs

See the ACE API docs

Call formatting and other specifics are covered in the API documentation:

https://developer.akamai.com/api/media_delivery/cloud_embed/v2.html#getsubcustomer3