| 1 | AOI | Astoria, Inc. | Callsign: Astoria, | CDN | AVCODES |
| 2 | AOI | Astoria, Inc. | | | ICAO1 |
| 3 | AOIB | ALBERTS ORGANCIS INC | | | SCAC4 |
| 4 | AOIE | AMERICAN NATIONAL LOGISTICS INC | | | SCAC4 |
| 5 | AOIG | AIR ONE INTERNATIONAL | | | SCAC3 |
| 6 | AOIG | AAA OIL INC | | | SCAC4 |
| 7 | AOII | ALDERWOOD FORWARDING INC | | | SCAC3 |
| 8 | AOIK | ATLAS OIL I LTD | | | SCAC4 |
| 9 | AOIL | ASTRO INC, MONROVIA LIBERIA | | | SCAC3 |
| 10 | AOIL | ALLIED OIL | | | SCAC4 |
| 11 | AOIM | A1 IMPORT/EXPORT LLC | | | SCAC4 |
| 12 | AOIM | Aoimori Railway | | J | TRAFFIC |
| 13 | AOIN | ALL OCCASION LIMOUSINE | | | SCAC3 |
| 14 | AOIN | A-ONE (A-1) INTERSTATE INC | | | SCAC4 |
| 15 | AOIR | ABLE OIL | | | SCAC4 |
| 16 | AOIS | ARTOIS TRUCKING | | | SCAC3 |
| 17 | AOIT | A-ONE (A-1) INTERNATIONAL COURIER S | | | SCAC3 |
| 18 | AOIT | A-ONE (A-1) INTERNATIONAL INC | | | SCAC4 |
| 19 | AOIV | ATCO INC | | | SCAC3 |
| 20 | AOIX | Marathon Petroleum Co. LLC | added 1/2007 | | NAKINA |
| 21 | AOIX | Marathon Ashland Petroleum LLC | added 1/1999; 7/2000-7/2005; eliminated 1/2006; added 4/2006; eliminated 1/2007 | | NAKINA |
| 22 | AOIX | Ashland Petroleum Co., Division of Ashland Oil, Inc. | added 4/1995; eliminated 1/1999 | | NAKINA |
| 23 | AOIX | Ashland Petroleum Co., Division of Ashland Oil, Inc. | added 4/95; eliminated 1/99 | | NRHS |
| 24 | AOIX | Marathon Ashland Petroleum LLC | added 1/99; 7/2000 | | NRHS |
| 25 | AOIX | MARATHON PETROLEUM CO. [MARATHON ASHLAND PETROLEUM CO.; ASHLAND OIL CO. | | | PWRC |
| 26 | AOIX | Ashland Oil (Marathon Petroleum) | | | RSRV |
| 27 | AOIX | MARATHON PETROLEUM COMPANY LLC | | | SCAC4 |
| 28 | AOIY | ALBERT OIL COMPANY INC | | | SCAC4 |
