| 1 | ALC | Southern Jersey Airways, Inc. | Callsign: Acom, | USA | AVCODES |
| 2 | ALC | Southern Jersey Airways, Inc. | | | ICAO1 |
| 3 | ALC | ALLEGHENY CENTRAL RAILROAD | | | PWRC |
| 4 | ALC | Autoliner Corp. | | USA | TRAFFIC |
| 5 | ALCA | ALCAL DELIVERY INC | | | SCAC3 |
| 6 | ALCA | ALCAL DELIVERY INC | | | SCAC4 |
| 7 | ALCAN | Rio Tinto Alcan | | UK | VKM |
| 8 | ALCB | ALBUQUERQUE CAB COMPANY INC | | | SCAC3 |
| 9 | ALCC | AGR. DIV., ALLIED CHEMICAL CORP. | | | PWRC |
| 10 | ALCC | ALCREST TRANSPORTATION SERVICES INC | | | SCAC4 |
| 11 | ALCD | ALLIED CHLORINE & CHEMICAL PRODUCE | | | SCAC3 |
| 12 | ALCD | A LAMP CONCRETE CONTRACTORS INC | | | SCAC4 |
| 13 | ALCE | ALCO EXPRESS CO | | | SCAC3 |
| 14 | ALCE | ALLIANCE CONTRACTOR TEAM | | | SCAC4 |
| 15 | ALCF | AMERICAN LIMO & COACH INC | | | SCAC3 |
| 16 | ALCG | ALL ACCESS LOGISTICS INC | | | SCAC4 |
| 17 | ALCH | ALLIED CHEMICAL CORP-ALLIED MOTOR O | | | SCAC3 |
| 18 | ALCH | ALTEX CHARTERED INC | | | SCAC4 |
| 19 | ALCI | ALCOA CARTAGE CO | | | SCAC3 |
| 20 | ALCI | AIR LIQUIDE CANADA INC | | | SCAC4 |
| 21 | ALCJ | ALC TRANSPORTATION INC | | | SCAC3 |
| 22 | ALCJ | ALCESMAR LIMITED | | | SCAC4 |
| 23 | ALCL | ALCALA, ENRIQUE V | | | SCAC3 |
| 24 | ALCM | AESA LOGISTICS CORP | | | SCAC4 |
| 25 | ALCN | ALSCRAN TRUCKING INC | | | SCAC3 |
| 26 | ALCNB | ALCAN (ALUMINUM COMPANY OF CANADA) | | | PWRC |
| 27 | ALCO | AMERICAN LOCOMOTIVE COMPANY | | | PWRC |
| 28 | ALCO | ANN-CAL TRUCKING CORP | | | SCAC3 |
| 29 | ALCO | AUTOTRANSPORTES LEE CASTILLO S A DE | | | SCAC4 |
| 30 | ALCO | | | USA | TRAFFIC |
| 31 | ALCO | Alcosuisse AG | | CH | VKM |
| 32 | ALCOS | Alcosuisse | | CH | TRAFFIC |
| 33 | ALCP | ALL CORPS | | | SCAC3 |
| 34 | ALCP | ALLIANCE RELOCATION SERVICES | | | SCAC4 |
| 35 | ALCQ | ALCO TRUCKING | | | SCAC3 |
| 36 | ALCQ | ALL CANADA CRANE RENTAL CORP | | | SCAC4 |
| 37 | ALCR | ALSTON CARTAGE LTD | | | SCAC4 |
| 38 | ALCS | ALCO SHIPPING AGENCIES BAHAMAS, LTD | | | SCAC3 |
| 39 | ALCT | ALTERNATIVE CHOICES TRANSPORTATION | | | SCAC4 |
| 40 | ALCU | AARTI INDUSTRIES LIMITED | | IND | BIC |
| 41 | ALCU | PRODUCTOS ASFALTICOS S.A. | | | SCAC3 |
| 42 | ALCU | AARTI INDUSTRIES LIMITED | | | SCAC4 |
| 43 | ALCV | ALLIED CONTAINER SERVICES | | | SCAC3 |
| 44 | ALCV | ALCO VENTURES | | | SCAC4 |
| 45 | ALCW | ALLIED CITY TRUCKING & WOODSIDE TRU | | | SCAC3 |
| 46 | ALCW | ALCO INC | | | SCAC4 |
| 47 | ALCX | Alcan Smelters and Chemicals, Ltd. | added 4/1992; 1/1994-7/2005; eliminated 10/2005; added 4/2006; eliminated 10/2009 | | NAKINA |
| 48 | ALCX | Aluminum Co. of Canada, Ltd. | 7/1932-1/1980; eliminated 5/1983; 1/1985 (not listed) | | NAKINA |
| 49 | ALCX | Aluminum Co. of Canada, Ltd. | 4/38-1/80; eliminated 5/83 | | NRHS |
| 50 | ALCX | Alcan Smelters and Chemicals, Ltd. | added 4/92; 1/94-7/2000 | | NRHS |
| 51 | ALCX | *ALLEGHENY CENTRAL SCENIC RAILROAD | | | PWRC |
| 52 | ALCX | +ALCAN SMELTERS & CHEMICAL, LTD. - CANADA {ALUMINUM COMPANY OF CANADA] | | | PWRC |
| 53 | ALCX | Alcan Smelters and Chemicals (Allegheny Creative Energy Solutions) | | | RSRV |
| 54 | ALCX | ALUMINUM COMPANY OF CANADA LTD | | | SCAC3 |
| 55 | ALCX | ALLEGHENY CREATIVE ENERGY SOLUTIONS | | | SCAC4 |
| 56 | ALCY | ALL CARTAGE TRANSPORTATION INC | | | SCAC3 |
| 57 | ALCY | ALL CARTAGE TRANSPORTATION INC | | | SCAC4 |
| 58 | ALCZ | ALLEN COUNTY CO-OP | | | PWRC |
