It's just like JoeyMD says up there. Googled it; it's somebody who sells extended warranties for your vehicle, and althohygh their "offices" (it's a mail drop) are in Florida, the call came in with a Maryland area code. We've been getting a lot of this kind of call recently, since our Hyundai just passed the three-year mark. (We didn't buy a warranty even when we bought the car. Waste of money.) Folks, these extended warranties are very expensive, but they don't cover much. Save your money for the repairs you're likely going to have to pay for out of pocket anyway.
At least National Dealer Service didn't spoof the Caller ID. With these guys, that represents the moral high ground.