| 1 | FGW | Fly Gangwon Co., Ltd. | IATA: 4V, Callsign: Gangwon, Established on 12 April 2016. Planned start Oct 2019 with 2 x 737-800. | ROK | AVCODES |
| 2 | FGW | First Great Western Ltd. | 1999: 1360km standard gauge, not electrified First Great Western is the operating name of First Greater Western Ltd[1], a British train operating company owned by First Group, which operates services in the South West of England. In 1998, the bus operator First Group acquired Great Western, along with its subsidiary North Western Trains (later First North Western), and re-branded it with its present name. On 1st April 2006, First Great Western, First Great Western Link and Wessex Trains combined into the new Greater Western Franchise. First were announced as the operator of the combined franchise in December 2005 for a 10-year period. | GB | TRAFFIC |
| 3 | FGW | First Great Western | | UK | VKM |
| 4 | FGWI | FREIGHT WATCHERS INC | | | SCAC3 |
| 5 | FGWI | FASTGROW LOGISTICS INC | | | SCAC4 |
| 6 | FGWU | CATERPILLAR (NI) LTD | | GB | BIC |
| 7 | FGWU | FG WILSON (ENGINEERING) LTD | | | SCAC4 |
| 8 | FGWX | Federal Grain Inspection Service (USDA) (test scale cars) | 1/1994-7/2005 (not listed) | | NAKINA |
| 9 | FGWX | Federal Grain Inspection Service (test scale cars) | Jan-94 | | NRHS |
| 10 | FGWX | Federal Grain Inspection Service (USDA) (test scale cars) | Jul-00 | | NRHS |
| 11 | FGWX | FEDERAL GRAIN INSPECTION SERVICE (USDA)(TEST SCALE CARS) | | | PWRC |
| 12 | FGWX | Federal Grain Inspection Service (USDA) | | | RSRV |
| 13 | FGWX | FEDERAL GRAIN INSPECTION SERVICE (U | | | SCAC4 |
