| 1 | ASO | Aero Slovakia a.s. | Callsign: Aero Nitra, | SK | AVCODES |
| 2 | ASO | Air Sarthe Organisation SA | Callsign: Azaud, | F | AVCODES |
| 3 | ASO | Aerosul Taxi Aéreo Ltda | Callsign: Aerosul, | BR | AVCODES |
| 4 | ASO | Aero Slovakia | | | ICAO1 |
| 5 | ASO | ARMCO STEEL (OHIO) | | | PWRC |
| 6 | ASOA | ASSOCIATED MOVING & STORAGE | | | SCAC3 |
| 7 | ASOA | A-STAR OIL | | | SCAC4 |
| 8 | ASOC | ASSOCIATED COURIERS INC | | | SCAC3 |
| 9 | ASOC | AST LOGISTICS LLC | | | SCAC4 |
| 10 | ASOD | ABSOULUTE LOGISTICS INC | | | SCAC4 |
| 11 | ASOE | AAA SOUTHERN EXPRESS INC | | | SCAC4 |
| 12 | ASOG | ASCO TRANSPORTATION INC | | | SCAC3 |
| 13 | ASOG | ANTONIO & SONS TRUCKING | | | SCAC4 |
| 14 | ASOH | AAA SOUTH CENTRAL NEW ENGLAND | | | SCAC3 |
| 15 | ASOK | ADAMS & SON TRUCKING IN | | | SCAC3 |
| 16 | ASOK | ADAMS TRUCKING INC | | | SCAC4 |
| 17 | ASOL | ASTRO TRANSPORT LTD | | | SCAC3 |
| 18 | ASOL | AIMCO SOLREC LTD | | | SCAC4 |
| 19 | ASOM | ASSOCIATED MOVING & STORAGE CO | | | SCAC3 |
| 20 | ASON | ASSOCIATED TRUCKING INC | | | SCAC3 |
| 21 | ASON | ASSOCIATED TRUCKING INC | | | SCAC4 |
| 22 | ASOO | A STORAGE ON WHEELS | | | SCAC4 |
| 23 | ASOP | A S A P SERVICES INC | | | SCAC3 |
| 24 | ASOQ | ASSOCIATED SHIPPERS INC | | | SCAC3 |
| 25 | ASOR | ASSOCIATED RECYCLING | | | SCAC3 |
| 26 | ASOS | ALTO & SONS TRUCKING | | | SCAC3 |
| 27 | ASOS | A & S LIMOUSINE | | | SCAC4 |
| 28 | ASOT | ASSOCIATED MATERIALS | | | SCAC4 |
| 29 | ASOV | ASSOCIATED TRANSPORTATION SERVICES | | | SCAC3 |
| 30 | ASOX | Americas Styrenics LLC | added 7/2008 | | NAKINA |
| 31 | ASOX | AMERICAS STYRENICS LLC | | | PWRC |
| 32 | ASOY | AIELLO, SEBASTIANO MEMOTIALS INC | | | SCAC4 |
