This could be dealt with in the U.S. with simple enforcement, but would also limit political parties soliciting by phone and that is my conspiracy theory for why it isn't enforced. It is trivial to find the VoIP providers that are providing the numbers to these telemarketing companies. NANPA (North American Numbering Plan Administrator) has a tool for finding them. https://nanpa.com/sites/default/files/2025-03/InstructionsFo...