| 1 | ALX | Congo Airlines | IATA: EO, Callsign: All Congo, Name changed to Hewa Bora Airways. Designator EO* reinstated by IATA | ZRE | AVCODES |
| 2 | ALX | Alliance Airlines Sprl | IATA: EO, Callsign: All Congo, Name changed to Congo Airlines | ZRE | AVCODES |
| 3 | ALX | Hewa Bora Airways | IATA: EO, Callsign: All Congo, IATA Prefix: 663, Founded in 1994. Ceased operations in 2011. Name changed from Congo Airlines. Designator EO* reinstated by IATA | ZRE | AVCODES |
| 4 | ALX | Alitaxi Srl | | I | AVCODES |
| 5 | ALX | flyCongo | IATA: EO, Callsign: Allcongo, IATA Prefix: 663, Founded in 2012. Commenced operations on 24 March 2012. Ceased operations in October 2012 when merged into Compagnie Africaine d'Aviation (CAA). Formerly Hewa Bora Airways | ZRE | AVCODES |
| 6 | ALX | Air Alanna Limited Trust distribution | Ceased operations on 10 December 2018. | UA | AVCODES |
| 7 | ALX | Alpi Jets GmbH | Callsign: Alpijets, | A | AVCODES |
| 8 | ALX | Hewa Bora Airways | IATA: EO | | ICAO1 |
| 9 | ALX | American Linseed Co. | 8/1920-7/1930 | | NAKINA |
| 10 | ALX | AMERICAN LINSEED CO. | | | PWRC |
| 11 | ALXB | ALEX BUS SERVICE INC | | | SCAC3 |
| 12 | ALXB | ALEX TRANSPORT | | | SCAC4 |
| 13 | ALXC | AUTOLINEAS EXPRESS GONZALEZ SA DE C | | | SCAC4 |
| 14 | ALXD | ALEXANDER, WENDELL | | | SCAC3 |
| 15 | ALXE | ANTWORTH, K M INC | | | SCAC4 |
| 16 | ALXF | ALEXANDER INTERNATIONAL | | | SCAC3 |
| 17 | ALXF | ALEXANDRE-ALEXANDER PUBLISHERS AND | | | SCAC4 |
| 18 | ALXG | ALEXANDER TRUCKING | | | SCAC3 |
| 19 | ALXH | ALEXS HOT SHOT SERVICE | | | SCAC3 |
| 20 | ALXI | ALEXANDER TRUCKING CO | | | SCAC3 |
| 21 | ALXI | ALTO XPRESS INC | | | SCAC4 |
| 22 | ALXJ | ALEXANDER, JESSIE LEE FREIGHT | | | SCAC3 |
| 23 | ALXK | ALEXANDER TRUCKING | | | SCAC3 |
| 24 | ALXK | ALEXANDER TRUCKING | | | SCAC4 |
| 25 | ALXL | ALLCARGOES EXPRESS LINE INC | | | SCAC3 |
| 26 | ALXM | ALEXANDERS MOVERS | | | SCAC3 |
| 27 | ALXM | ALEXIM TRADING CORPORATION | | | SCAC4 |
| 28 | ALXN | ALEXANDER TRUCKING COMPANY | | | SCAC3 |
| 29 | ALXN | ALCON EXPRESS CORP | | | SCAC4 |
| 30 | ALXO | ALEXANDER, V & COMPANY INC | | | SCAC3 |
| 31 | ALXO | ALEXANDER OIL CO | | | SCAC4 |
| 32 | ALXP | AIRLAND EXPRESS INC | | | SCAC4 |
| 33 | ALXQ | ALEXANDER TRUCKING | | | SCAC3 |
| 34 | ALXR | ALEXANDER TRUCK LINE | | | SCAC3 |
| 35 | ALXR | ALAMAL TRANSPORT INC | | | SCAC4 |
| 36 | ALXS | ALEXANDRIA SCRAP CORP | | | SCAC3 |
| 37 | ALXS | ALIANA EXPRESS INC | | | SCAC4 |
| 38 | ALXT | ALEXANDER TRUCKING COMPANY | | | SCAC4 |
| 39 | ALXU | AIRLIFE GASES PRIVATE LIMITED | | IND | BIC |
| 40 | ALXV | ALEXANDERS MOBILITY SERVICES | | | SCAC4 |
| 41 | ALXW | ART LEATHER DE MEXICO S DE R L DE C | | | SCAC4 |
| 42 | ALXY | AMERICAN LUXURY CAR TRANSPORTATION | | | SCAC3 |
| 43 | ALXY | ALLIED AMERICAN TRANSPORT SOLUTIONS | | | SCAC4 |
