Received a call from this number that was ID'd as "Tennessee". I answered and it was a robo call. I think it was malfunctioning though, the message stopped talking, then disconnected.
Call from a robo dialer with spoofed caller ID. Selling alarm service.
They do not have a list -- robo dialers can spray out the entire 1000 numbers in an area code and prefix in minutes.
There are just enough live operators to come on line should a number pick up. You'll hear a transient when the switch to live operator happens. In the old analog systems, it would have sounded like a click. With digital systems the click is aliased to a "sproing" type sound. All these calls originate from call unscrupulous call centers that use a low-budget VoIP phone provider who does not care what crimes their customers commit using their VoIP service.
We must shut down these call centers; the criminal VoIP providers; and jail every one of them.
Until your Congress critter grows a pair, your stuck buying a blocker.
Frankly, I'm ready to go off-grid as far as telephone service is concerned.
As it is, I have my ringers turned off -- and do use a blocker.