I just Googled the number - it's a phone number for Greater Media; they own a bunch of stations, mostly around Philadelphia. The one I'm most familiar with is 93.3 WMMR - I just got a call from them to confirm my appointment for the Locks Of Love event this Friday.
A guy from this number called my office and left me a message asking for a call back to discuss how his company has help my business. He never stated the name of his company, but did give a name and callback number.