| 1 | ALP | Alpliner AG | Callsign: Alpliner, | CH | AVCODES |
| 2 | ALP | Société Air Alpes | IATA: LP, Merged into TAT | F | AVCODES |
| 3 | ALP | Allpoints Jet Co., Ltd. | Callsign: Allpoints, | PRC | AVCODES |
| 4 | ALP | Alpliner AG | | | ICAO1 |
| 5 | ALPA | ALPHA OMEGA TRANSPORT INC | | | SCAC3 |
| 6 | ALPD | ALLSTATE TRANSPORT INC | | | SCAC3 |
| 7 | ALPE | A LAWN POINT ENTERPRISES LIMITED | | | SCAC4 |
| 8 | ALPE | Autobusowe Linie Prywatne, sp. z o.o. | City: Elbląg | PL | TRAFFIC |
| 9 | ALPF | ATLANTIC-PACIFIC-GULF TRANSPORT CO | | | SCAC3 |
| 10 | ALPG | ALSIP TRUCKING CO | | | SCAC3 |
| 11 | ALPG | ALBINI & PITIGLIANI SPA | | | SCAC4 |
| 12 | ALPH | ALPHA CARGO MOTOR EXPRESS INC | | | SCAC3 |
| 13 | ALPHA | Alpha Rail Team GmbH& Co.Kg | | DE | VKM |
| 14 | ALPI | ALL POINTS MOVING & STORAGE INC | | | SCAC3 |
| 15 | ALPI | ALPI USA INC | | | SCAC4 |
| 16 | ALPICO | Alpico Kotsu Co., Ltd | Alpico Kotsu Co., Ltd. is a public transport company in Nagano Prefecture, Japan. It is the core company of Alpico Group and is wholly owned by Alpico Holdings Co., Ltd. The company was known as Matsumoto Electric Railway Co., Ltd. (Matsumoto Denki-tetsudo Kabushiki-gaisha) until its merger with two affiliate companies on April 1, 2011 | J | TRAFFIC |
| 17 | ALPIN | Alpine Bau GmbH | | AT | VKM |
| 18 | ALPJ | ALLCARGO GLOBAL LOGISTICS LTD | | | SCAC4 |
| 19 | ALPL | ALL POINTS LOGISTICS INC | | | SCAC4 |
| 20 | ALPM | ALL POINTS MOVING & STORAGE | | | SCAC3 |
| 21 | ALPM | ALPINE CARRIERS LLC | | | SCAC4 |
| 22 | ALPN | ALL PRO NC | | | SCAC4 |
| 23 | ALPO | ALEXANDER, D L TRUCKING | | | SCAC3 |
| 24 | ALPP | ALL POINTS LOGISTICS INC | | | SCAC4 |
| 25 | ALPQ | AAA LOOP OFFICE FURNITURE MOVERS & | | | SCAC3 |
| 26 | ALPR | ALL PRO FREIGHT CARRIERS INC | | | SCAC4 |
| 27 | ALPS | ALPINE TRANSPORTATION CO INC | | | SCAC3 |
| 28 | ALPS | ALPHA PETROLEUM TRANSPORT INC | | | SCAC4 |
| 29 | ALPT | ALPERT, PHILIP L MOVING & STORAGE C | | | SCAC3 |
| 30 | ALPT | ADVENTURER LP | | | SCAC4 |
| 31 | ALPU | AIR LIQUIDE FRANCE INDUSTRIE | | F | BIC |
| 32 | ALPU | L'AIR LIQUIDE | | | SCAC3 |
| 33 | ALPU | AIR LIQUIDE ELECTRONICS MATERIALS | | | SCAC4 |
| 34 | ALPV | ALPINE-DART MOVING INC | | | SCAC3 |
| 35 | ALPW | ALBANY PARK-WAGNERS INC | | | SCAC3 |
| 36 | ALPX | Alberta Government | added 1/81; 1/1985-7/2005 | | NAKINA |
| 37 | ALPX | Allen Packing Co., A Division of Food Fair Stores, Inc. | added 7/1967; 4/1970-1/1980; eliminated 4/1980 | | NAKINA |
| 38 | ALPX | Allen Packing Co., A Division of Food Fair Stores, Inc. | added 7/67; 4/70-1/80; eliminated 4/80 | | NRHS |
| 39 | ALPX | Alberta Government | added 1/81; 1/94-7/2000 | | NRHS |
| 40 | ALPX | *ALLEN PACKING CO., DIV. OF FOOD FAIR STORES, INC. | | | PWRC |
| 41 | ALPX | +ALBERTA GOVERNMENT | | | PWRC |
| 42 | ALPX | Alberta Government | | | RSRV |
| 43 | ALPX | ALBERTA GOVERNMENT, THE | | | SCAC4 |
| 44 | ALPX | Alberta Government | | CDN | TRAFFIC |
| 45 | ALPZ | ALLIED PAPER COMPANY | | | PWRC |
