| 1 | AOO | As, Opened Joint Stock Company | Callsign: Company As, | UA | AVCODES |
| 2 | AOO | As, Opened Joint Stock Company | | | ICAO1 |
| 3 | AOOE | ALS CORNER OIL CO | | | SCAC4 |
| 4 | AOOK | A-ONE (A-1) MOVING & STORAGE INC | | | SCAC3 |
| 5 | AOON | ANDERSON OIL CO OF NICHOLS INC | | | SCAC4 |
| 6 | AOOR | ARRISON TRANSPORT | | | SCAC3 |
| 7 | AOOS | AMODIO & SONS INC | | | SCAC4 |
| 8 | AOOT | ARNOLD MOTOR TRANSPORT INC | | | SCAC3 |
| 9 | AOOT | ARNOLD MOTOR TRANSPORT INC | | | SCAC4 |