[troydavis]

Thank you! I put what little I knew in https://reportphonespam.org/#not-in-the-us-or-canada , but that's not much :-) I'd welcome any other ideas or additions. My email address is in my HN profile.

One of the carrier lookup APIs that the site recommends, Twilio's "Line Type Intelligence" API, may support numbers in other countries. That might be a place to start: https://reportphonespam.org/#How-do-I-look-up-more-numbers