Hate to burst your bubble but this isn't real. I work for a company that specializes in "radio bits". Basically we make radio comedy sketches, topical parody songs about current events and prank phone calls.
The FFC has banned the airing of actual prank phone calls on the airway because it violates their broadcasting laws or whatever. So whenever you hear something like this it is usually is made by a third party company for radio stations to play which they act like it's real.
The production value is really good and the actors are convincing and some of dialog is too convenient to be coincidental.