| 1 | FOS | Formosa Airlines | Designator HU recalled by IATA | RC | AVCODES |
| 2 | FOS | Formosa Airlines Corp. | IATA: HU, Designator HU recalled by IATA. Formerly Yung Shing Airlines | RC | AVCODES |
| 3 | FOS | Bel Ltd | | RUS | AVCODES |
| 4 | FOS | Formosa Airlines | IATA: VY | | ICAO1 |
| 5 | FOS | Bel Limited | | | ICAO1 |
| 6 | FOSA | FIVE O SEVEN ANTIQUES | | | SCAC4 |
| 7 | FOSB | FOUR SEASONS BUS TOURS | | | SCAC3 |
| 8 | FOSB | FOUR SEASONS BEER DISTRIBUTION INC | | | SCAC4 |
| 9 | FOSC | FOSTER VAN LINES INC | | | SCAC3 |
| 10 | FOSC | FOSTER VAN LINES INC | | | SCAC4 |
| 11 | FOSD | FOSTER DRAYAGE COMPANY | | | SCAC3 |
| 12 | FOSE | FOSTER, LLOYD | | | SCAC3 |
| 13 | FOSE | FOUR SEASONS TRANSPORT & LEASING IN | | | SCAC4 |
| 14 | FOSF | FORSTER FREIGHT FORWARDERS INC | | | SCAC3 |
| 15 | FOSFA | Fosfa akciová společnost | | CZ | VKM |
| 16 | FOSG | FOSS, G A TRANSPORT LTD | | | SCAC4 |
| 17 | FOSH | FOSMO, HAROLD D | | | SCAC3 |
| 18 | FOSI | FAST OCEAN EXPRESS INC | | | SCAC4 |
| 19 | FOSJ | FERRI OIL SERVICE | | | SCAC4 |
| 20 | FOSK | FOSHEE TRUCKING INC | | | SCAC3 |
| 21 | FOSK | FOSHEE TRUCKING INC | | | SCAC4 |
| 22 | FOSL | FOUR STAR LEASING INC | | | SCAC3 |
| 23 | FOSM | FOSTER-GARDNER INC | | | SCAC3 |
| 24 | FOSM | FOSTER MOVING SYSTEMS INC | | | SCAC4 |
| 25 | FOSN | FOSTER & SCOTT TRUCKING LTD | | | SCAC3 |
| 26 | FOSO | FULL SERVICE RELOCATION | | | SCAC4 |
| 27 | FOSP | FOOD SHIPPERS INC | | | SCAC3 |
| 28 | FOSR | FOUR STAR TERMINALS INC | | | SCAC3 |
| 29 | FOSS | FOSS, DAN COURIERS | | | SCAC4 |
| 30 | FOST | FOSTER, R H ENERGY LLC | | | SCAC4 |
| 31 | FOSU | FUJIAN ORIENT SHIPPING CO,LTD | | PRC | BIC |
| 32 | FOSU | FUJIAN ORIENT SHIPPING CO LTD | | | SCAC4 |
| 33 | FOSW | FALCON 1 SEA TRANSPORT, INC | | | SCAC3 |
| 34 | FOSY | FLARE OUT SUPPRESSION SYSTEMS | | | SCAC4 |
