I don't know if the old copper line home phone service from Verizon has that capability, but it's sure made my life easier knowing that if my phone rings, it's someone I want to talk to calling.
That too is a phone company Con. The telemarketers have thousands of phone numbers. When the robo call machine detects a call block it has another line call you. Phone companies are making a fortune off telemarketers both from consumer and business. They have no ethics.