| 1 | AYR | British Aerospace Flying College Limited | Callsign: Cygnet, Name changed to BAe Systems Flight Training (U.K.) Limited. | GB | AVCODES |
| 2 | AYR | British Aerospace Flight Training (U.K.) Limited | Callsign: Cygnet, Name changed from British Aerospace Flying College Limited. Name changed to BAe Systems Flight Training (U.K.) Limited. | GB | AVCODES |
| 3 | AYR | BAe Systems Flight Training (U.K.) Limited | Callsign: Cygnet, Name changed from British Aerospace Flight Training (U.K.) Limited and previously British Aerospace Flying College Limited. | GB | AVCODES |
| 4 | AYR | Flight Training Europe S.L. | Callsign: Cygnet, Name changed from BAe Systems Flight Training (U.K.) Limited and previously British Aerospace Flight Training (U.K.) Limited and previously British Aerospace Flying College Limited. | E | AVCODES |
| 5 | AYR | Flight Training Europe | | | ICAO1 |
| 6 | AYRA | AYERS, ROY A | | | SCAC3 |
| 7 | AYRK | ALYS-TAR TRUCKING | | | SCAC4 |
| 8 | AYRM | AYERS MARITIME SERVICES INC | | | SCAC3 |
| 9 | AYRM | AYERS MARITIME SERVICES INC | | | SCAC4 |
| 10 | AYRS | AYRE SHIPPING CO., LTD. | | | SCAC3 |
| 11 | AYRX | Arms-Yager Co. | 1/1945-1/1946 | | NAKINA |
| 12 | AYRX | Arms-Yager Railway Car Co. | 7/1923-1/1943 | | NAKINA |
| 13 | AYRX | Arms-Yager Railway Car Co. | Apr-38 | | NRHS |
| 14 | AYRX | ARMS-YAGER CO. [ARMS-YAGER RAILWAY CAR CO.] | | | PWRC |