@Training Wheels posted:True for the most part, but four exceptions come to mind.
East of the Mississippi - KDKA (Pittsburgh), KYW (Philadelphia). West of the Mississippi - WDAF & WHB in Kansas City, MO.
Add to that KQV (Pittsburgh) – branded KQV AM 1410 – is a non-commercial easy listening radio station licensed to serve Pittsburgh, Pennsylvania and covering the Greater Pittsburgh Region. So there are 3 in Pennsylvania, 2 of which in Pittsburgh! We never could follow convention.