Got it today on the cell phone. The LG cell phone has a setting so it won't answer unless it is in my contact list but records the number. The home phone, Ooma Premier, "no more robos", and has a block list I can add to but I rarely bother with anymore since it has caller ID. One simple rule, if the identifying caller only has a city, or just a number forget it. Thanks all for the information!
At 10:04 I got a call from 916-758-8621 and I didn't answer. I don't answer unknown number because if it's important, whoever it is will leave a message. Then got a call from this number (786-209-0861) at 10:12. Didn't answer that one either. No message left for either call. Both numbers blocked.