This is a Automated Call Center from a computer for a business that locates people. They mask the real phone number so you do not know who they are with a valid phone number. The computer is calling phone numbers at random times to identify when you most likely are home. The computer will never talk or leave message and hang up when you answer. They just what to know if it is a valid phone number and the time you are home. The business is trying to find you because you owe money to someone in the past from from Bankruptcies, Lien judgement , ETC, and then sells your name and phone number and debt information to a Collection Agency in attempts the get the money from you. They do not care if it debt has been satisfied by a court and you no longer are required to pay it. As long as some action to collect it has been done in the last 7 years, they can continue to try to collect it forever.