I called the number back. It was a survey for American Suzuki motors (I recently took my car to the dealership for recall work). The recording told me to expect a call back in a day or two or to expect a survey in the mail.
No harm, no foul.
The weird part is that I called back from another line, about an hour after I got the call and got some man in New Jersey who hadn't called me and had no idea why his number showed up on my caller id.
That being said, we did bring our Suzuki in about 2 weeks ago for work.