Received a call from TEST, 650-262-1221 at 8:50 a.m. They haven't called in a while and now it looks like they have started back up again. They never leave a message and hang up and as soon as the answering machine starts you hear the click. Thank heavens for caller ID because the DNCL does nothing to protect us from these scammers. When the phone number comes up I always google it to see who it is and what scam they are trying to sell. How sad they can't get a real job. I did.

If there was sufficient political will, these could be stopped.  And I don't mean merely passing more unenforcable laws.  

This number repeatedly calls my house and then not leave a message. Since it only says "test" as the caller I don't answer them

Yes. The "do not call list" is [***]! Many times in a week I'm bothered from different callers.

This number calls all the time and at different times. It never leaves a message so it can 't be too important. Recently installed nomorobo on my phone, one ring and call is disconnected . Good riddance !