I wonder where even the few who called got the phone number. It would take a listener who didn't know the owner (and I doubt many did) a good bit of detective work. It's easy to get a result for Delmar's Classic Hits station by Googling "phone number for 96.7 Columbus" or "phone number for 96.7 Delaware." Not so for 92.9. You mostly come up with stuff for the late WWCD. And are calls to Delmar regarding 92.9 being routed to you? And if you're giving a number on air, it's in Spanish, right?
EDIT: Looks like the 3rd Google result for "my 92.9 columbus phone number" give Delmar's number.