| 1 | AKO | Aerotec Maintenace & Service GmbH | Callsign: Obelix, | D | AVCODES |
| 2 | AKO | Aerolineas Colonia S.A. (Arco S.A.) | IATA: KO, Callsign: Kilo Oscar, | ROU | AVCODES |
| 3 | AkO | Arbeitskreis Ostertalbahn eV | St. Wendel | D | privat-bahn.de |
| 4 | AKO | Arbeitskreis Ostertalbahn (AkO) e.V | | DE | VKM |
| 5 | AKOC | AKRON-CANTON TRANSFER INC | | | SCAC3 |
| 6 | AKOF | AIRKO FREIGHT SYSTEMS INC | | | SCAC3 |
| 7 | AKOI | AKOI MARITIME CORPORATION | | | SCAC3 |
| 8 | AKOL | ALASKA OIL SALES INC | | | SCAC3 |
| 9 | AKOL | ALCO FREIGHT SERVICES INC | | | SCAC4 |
| 10 | AKON | ATKINSON & CO TRUCKING INC | | | SCAC3 |
| 11 | AKON | ATKINSON, DON TRUCKING LIMITED | | | SCAC4 |
| 12 | AKOO | A&K TRANSPORT CO | | | SCAC3 |
| 13 | AKOR | ABC KORTSCH MOVING & STORAGE CO INC | | | SCAC4 |
| 14 | AKOR | Air Koryo | Real: KOR | PRK | TRAFFIC |
| 15 | AKOT | ALASKA OUTPORT TRANSPORTATION ASSOCIATION, INC | | | SCAC3 |
| 16 | AKOU | HONG KONG SPECIALITY GASES CO LTD | | | SCAC4 |
| 17 | AKOX | Aycock-Lindsey Corp. | 7/1935-4/1938 | | NAKINA |
| 18 | AKOX | Aycock-Lindsey Corp. | Apr-38 | | NRHS |
| 19 | AKOX | AYCOCK-LINDSEY CORP. | | | PWRC |
