The German equivalent https://en.wikipedia.org/wiki/Federal_Network_Agency https://en.wikipedia.org/wiki/Federal_Network_Agency has such power. They receive 200

The German equivalent https://en.wikipedia.org/wiki/Federal_Network_Agency https://en.wikipedia.org/wiki/Federal_Network_Agency has such power. They receive 200.000 complains per year (nice accessible online form) and force providers to block numbers. Also if it turns out to be fraud, e.g. you made a contract with the fraudser over the phone, then the contract is void and the company has no legal standing to demand money. If they operated a premium number (calling back costs you money) the provider has to void the amount. Pretty solid, I haven't received a spam call in 5, maybe 10 years. Of course still plenty others do, thus the 200.000 complains per year, and foreign numbers can't be blocked or tracing the calls leads nowhere. For the US it might be a great improvement.