They hung-up, left no message on answer machine; 301 Area Code is now put into my CPR V5000 Call Blocker device.
They called. I didn't answer unknown number. They left no message. Must not be important.
I just got a call which I will add or have already added to my block list. I will now get no ring but will get a list of blocked calls on my phone.
I have the Panasonic cordless telephone Model kx-tg6842b (2 handsets)
You can block 250 numbers plus kill the one ring that existed on earlier models that only allowed 30 blocked numbers. If other phone models are connected you will still get the first ring on them.
The one handset model sells for $70 at Amazon.