I'm aware of station identification requirements. It's possible that there were top-of-the-hour announcements I didn't hear or don't remember.

What I distinctly recall was that it was possible to get through a full weather or traffic report without the region being identified.

These days, a frequent gripe is that local-media websites (radio and television) fail to specify the state. Where a call-sign is available, I'm obliged to look that up on Wikipedia to figure out what location the story concerns. Place names are often given only as small town or county names, neither of which typically have national recognition, and many of which repeat from state to state.