Ditto, the Caller ID just says Philadelphia PA along with the phone number. I listened to the entire message. Spiel was about helping you with back taxes owed to the IRS -- which we don't owe anything. Then they instruct you to press 1 to speak to an agent. I did, just to see what would happen. Lo and behold, all agents were busy! Imagine that! Then they tell you to give your full name, phone number, and the amount of back taxes you owe, and BEEP, start recording, you're supposed to fall for it. Well, I turned them in to the FCC. Enough people do this, the bums will be hunted down. Here's the handy dandy web site, you just fill in the blanks, very easy to navigate.
http://www.fcc.gov/complaints