Nothing on the answering machine.

Picked up and they hung up

Keeps calling. Finally, they asked for someone who no longer lives here. I have asked them to remove my number but they keep calling

they called and didn't say anything...

They called my office and didn't say anything. They have been calling once or twice a day. I think they hang up because this is a business they are calling, and they want residential people. But they have never said anything, and promptly hang up once I state the name of my business.