| 1 | FSY | Fassey Aviation Ltd. | Callsign: Fassey, | WAN | AVCODES |
| 2 | FSY | Algonquin Airlink Inc. | Callsign: Frosty, Name changed to Privateair Inc. | CDN | AVCODES |
| 3 | FSY | Privateair Inc. | Callsign: Frosty, Name changed from Algonquin Airlink Inc. | CDN | AVCODES |
| 4 | FSYA | Free Syrian Army | Real: FSA | SYR | TRAFFIC |
| 5 | FSYD | FORSYTH, D LTD | | | SCAC4 |
| 6 | FSYI | FREIGHT SYSTEMS (INDIA) PVT LTD | | | SCAC4 |
| 7 | FSYL | FREIGHT SYSTEMS, LTD | | | SCAC3 |
| 8 | FSYL | FORSYTH TRANSPORT INC | | | SCAC4 |
| 9 | FSYM | FREIGHT SYSTEMS INTL INC | | | SCAC4 |
| 10 | FSYT | FREIGHT SYSTEMS INC | | | SCAC4 |
