People kept calling my husbands business line and never leaving a message. Finally after they call at 9pm I called them back. It is a telemarketer calling for a discount subscription to the daily Oklahoman. If you call back hit 3 - this removes you from call list but don't hang up right away you will have to hit 1 twice saying you are sure you want the annoying calls to stop.
Thank you for the instruction because I was getting an Unknown call and then a call from 405-254-4964 at least 3-4 times per day. Very annoying, but did what you said so hopefully the calls will stop. Thanks again.