CID says "Name Unavailable" but no message left. Getting lots of scam calls with prefix starting with 1. What makes them think I would ever do business with cold call solicitors violating the no call registry?

Got another call from that number today. Same old, same old, no message left.

This number calls almost everyday at the same time.  Whenever I answer the call, there is no one on the other line and the phone is dead.  This is quite annoying.  Can anything be done?  I am already on the Do Not Call Register.

Have had numerous, annoying calls. How can it be stopped/

Since the people calling are scammers, they do not care if you are the Do not call registry.
My solution is caller ID and caller block, and a phone that allows up to 250 numbers being blocked. The bozos at 1-650-156-4987 still try to call me, but my phone blocks them out after the 2nd ring.