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.