| 1 | AOU | Air Tractor d.o.o. | Callsign: Air Tractor, | HR | AVCODES |
| 2 | AOU | Air Tractor | | | ICAO1 |
| 3 | AOUF | ARMY OUTFITTERS | | | SCAC4 |
| 4 | AOUN | ALL-AROUND MOVING INC | | | SCAC4 |
| 5 | AOUO | ACCORD LOGISTICS SOLUTIONS INC | | | SCAC4 |
| 6 | AOUR | ADVENTURE OUTFITTERS | | | SCAC4 |
| 7 | AOUT | ATLAS OIL CO OF UTICA INC | | | SCAC4 |
| 8 | AOUV | ABC TOURS & TRAVEL | | | SCAC3 |
| 9 | AOUX | Alberta & Orient Glycol Co. Ltd. | added 10/1994; 7/2000-7/2005 | | NAKINA |
| 10 | AOUX | Alberta & Orient Glycol Co. Ltd. | added 10/94; 7/2000 | | NRHS |
| 11 | AOUX | ALBERTA & ORIENT GLYCOL COMPANY LIMITED | | | PWRC |
| 12 | AOUX | Alberta and Orient Glycol | | | RSRV |
| 13 | AOUX | ALBERTA & ORIENT GLYCOL COMPANY LIM | | | SCAC4 |
