DirectTV. They call my phone 2-3 times a day and do not say anything when I answer. I called the number back and surprisingly someone answered named "Dallas". I explained I kept receiving calls from this number and nobody says anything and wanted to be removed from their call list. He said "okay" and hung up. I called back and he answered again. I didn't appreciate being hung up on and explained so. He said they have caller ID and my number was put on the do not call list. I don't quite believe it but we shall see.