Join Date: Jul 2001
Location: Near Pittsburgh, Pennsylvania, USA, Earth (PIT)
Programs: Airline/TSA Avoidance Platinum, Hotel Disloyalty Silver, Hertz 1.7*
Posts: 5,277
Well, it does seem that some airports start numbers again at 1 in each concourse (thus there's an A1-Ax, B1-Bx, C1-Cx, etc.) whereas others don't (PIT, for instance, where B concourse starts with B26 and C with C51 and so forth).