same thing happened to us this morning, they called @ 11:26 EST with no one on the line... we are a 2 person clinical office that rarely gets calls outside of our area code unless it is a telemarketer...
OK, they just called again, no one on the line. I called them back - had a pleasant woman admit they have a computer dialer, she inquired who's in charge of our utilities, I politely told her we're a licensed business INSIDE of a major national retail store INSIDE of a shopping mall and that I really was unable to help her. She said she'd take our number off the list, but who knows. At least she was nice...