Many of you are falling for the "Are You There?" or "Can You Hear Me?" scammers - google it and please, stop talking to scammers- don't even answer the phone! These people use several different numbers, most of them from 412 area codes.
To block a call on a land line you have to buy a separate piece of equipment, a call blocker. It plugs into the phone line between the phone and the wall. It also needs an electric outlet. It comes with instructions on how to tell it which numbers to block.
You can buy a call blocker for a land line at Best Buy or on Amazon.