The vast majority of FedEx stations use a 3-letter airport identifier (e.g. LAX), which has the very intentional purpose of "proving" FedEx is an airline. In the case of LAX, FedEx aircraft do actually use this airport, but for most locations, your "Airport ID" is probably associated with either a). an airport that has absolutely zero to do with FedEx aircraft, or b). a location that is many miles from the airport that has little to nothing to do with FedEx aircraft, or c). an airport that has an indirect, but far-removed connection with FedEx aircraft. This makes no sense, except as it pertains to the perpetuation of the RLA. Back to LAX. Lets say you work at one of the many satellite stations surrounding Los Angeles. Your freight might come-in to LAX, but your station ID is still for the local airport, even if the biggest thing that lands there is a Piper Cub, or was paved-over 30 years ago for a business park. This usually holds true for stations that are many, many miles away from where their freight arrives. While there are certainly exceptions, most stations have a deliberate airport association, even if there isn't one. Once again, is FedEx an airline with trucks, or a trucking company that operates aircraft? I vote for the latter. And check to see if your town once had an airport that no longer exists. If it does, I can almost guarantee you that FedEx is using that defunct airport identifier for your station.