When I moved states several years ago, the spam callers were mostly choosing DIDs from my immediately local area within a few months of having moved. This isn't

When I moved states several years ago, the spam callers were mostly choosing DIDs from my immediately local area within a few months of having moved. This isn't new. Wild guess, geolocation data collected from a phone, either from an app or even from normal website visits where the visitor can be identified and their ip address geolocated. Cross referenced with the phone number when queueing numbers into the auto-dialer, to choose an appropriate fake callerid. I wouldn't rule out the cellular carriers providing such a service themselves, but seems trivial to do with or without a carrier's assistance for data brokers. They could even make their usual bogus claims of anonymization, if an api accepted only a phone number, and only returned general loosely recent location information like city/state/county.