call blocker whitelist.
Is there a call blocker product or service for a telephone landline which will allow me to create a whitelist from the Contacts list on my iMac? (I do not want to enter the numbers manually, one-at-a-time.)
On my iPhone, I turned ON the "Silence Unknown Callers" in Settings. It is a great feature as it has stopped unwanted Spam calls from ringing thru on my iPhone.
I'd like to do the same thing with my Comcast landline. Thus, my question.