| 1 | FDX | Federal Express Corporation d/b/a FedEx | IATA: FX, Callsign: Fedex, IATA Prefix: 023, ICAO callsign changed to Express | USA | AVCODES |
| 2 | FDX | Federal Express Corporation d/b/a FedEx | IATA: FX, Callsign: Express, IATA Prefix: 023, ICAO callsign changed from Fedex. IATA designator changed from MB | USA | AVCODES |
| 3 | FDX | Federal Express Corporation (Fedex) | IATA: MB, Callsign: Express, ICAO designator changed from FDE | USA | AVCODES |
| 4 | FDX | Federal Express | IATA: FX | | ICAO1 |
| 5 | FDX | Frigid Despatch Line, Inc. | 4/1938 | | NAKINA |
| 6 | FDX | Frigid Despatch Line | 7/1937 | | NAKINA |
| 7 | FDX | Frigid Despatch Line (cars No. 600-699) (for other cars see American Refrigerator Transit Co.) | 7/1935 | | NAKINA |
| 8 | FDX | FRIGID DESPATCH LINE | | | PWRC |
| 9 | FDXE | FREEDOM EXPRESS | | | SCAC4 |
| 10 | FDXF | FEDEX SUPPLY CHAIN SERVICES INC (CE | | | SCAC4 |
| 11 | FDXN | FREDEX LLC | | | SCAC4 |
| 12 | FDXP | FREEDOM EXPRESS INC | | | SCAC4 |
| 13 | FDXQ | FREEDOM TRANSPORTATION INC | | | SCAC4 |
| 14 | FDXS | FOAM DE MEXICO S DE RL DE CV | | | SCAC4 |
| 15 | FDXU | FEDEX FREIGHT INC | | USA | BIC |
| 16 | FDXU | Fedex Freight | | | RSRV |
| 17 | FDXU | FEDERAL EXPRESS CORPORATION | | | SCAC4 |
