They are probably using "Voice over IP" which means they can "spoof" almost any number. Keeps you from tracking them down and turning them in to the FTC. They are not going to give you the correct number anyway, because they are breaking the law: 1. If they use a robocall. 2. You are on the "Do Not Call" list.
Answered the call and immediately informed them they have dialed a number on the Do Not Call list. Lady said she would help me out with that. I hung up.
Received call and lady on line asked for my husband after telling her he wasn't here, she just hung up without saying anything. Very rude! It did sound like she was calling from a call center, I could hear lots of phones ringing in the background. I called back and it says phone line disconnected.