I use nomorobo to block calls. It works by stopping the calls after one ring - calls from unknown callers. And it does work. Sometimes the occasional robo call gets through but then you just text nomorobo with the caller ID and the phone number of the caller and they will block it the next time.
That’s what I use too - an occasional one slips through but works for me...A lot of silence in the house after getting it.
NoMoRobo doesn’t seem to work when the number on the caller id matches the number being called. Perhaps spoofing numbers on a robocall should be made a capital felony.
So sweet. Thanks! Turns out my carrier offers it as a service automatically in the Call Forwarding setup.