| 1 | AEC | Aerocesar, Aerovias Del Cesar | Callsign: Aerocesar, | CO | AVCODES |
| 2 | AEC | Aeroservicios de Almeria 2000, S.L. | | E | AVCODES |
| 3 | AEC | Aerocesar, Aerovias Del Cesar | | | ICAO1 |
| 4 | AEC | Atlantic and East Carolina Ry. Co. | 1/1941-1/1975; eliminated 4/1978; 1/1980-7/2005 | | NAKINA |
| 5 | AEC | Atlantic and East Carolina Ry. Co. | 1/52-1/75; eliminated 4/78; 1/80-7/2000 | | NRHS |
| 6 | AEC | ATLANTIC & EAST CAROLINA RWY. | | | PWRC |
| 7 | AEC | Atlantic and East Carolina Railway | | | RSRV |
| 8 | AEC | ATLANTIC AND EAST CAROLINA RAILWAY | | | SCAC4 |
| 9 | AEC | Associated Equipment Company | | GB | TRAFFIC |
| 10 | AECA | AMERICAN HOUSEHOLD GOODS BROKERS IN | | | SCAC4 |
| 11 | AECB | A & E CHARTER BUS SERVICE LTD | | | SCAC3 |
| 12 | AECB | AMERICAN FRONTIER TRUCK LINES | | | SCAC4 |
| 13 | AECC | ARKANSAS ELECTRIC CO. | | | PWRC |
| 14 | AECD | AMERICAN CONSOLIDATORS INC | | | SCAC3 |
| 15 | AECE | ATLANTIC FUEL INC | | | SCAC4 |
| 16 | AECG | AERO CARGO INC | | | SCAC3 |
| 17 | AECH | ANDRES EXPRESS CORP | | | SCAC4 |
| 18 | AECJ | A E CONSOLIDATED INC | | | SCAC3 |
| 19 | AECK | ACE COURIER | | | SCAC3 |
| 20 | AECL | ALLEN, C L TRUCKING | | | SCAC3 |
| 21 | AECL | ALLEN, C L TRUCKING | | | SCAC4 |
| 22 | AECM | AMERICAN CLEANING & MAINTENANCE ENT | | | SCAC3 |
| 23 | AECM | AMERICAN CLEANING & MAINTENANCE ENT | | | SCAC4 |
| 24 | AECN | AERO CORPORATION | | | SCAC3 |
| 25 | AECN | ANDERSON EXPRESS | | | SCAC4 |
| 26 | AECO | AMERICAN ENVIRONMENTAL CONTAINER CO | | | SCAC4 |
| 27 | AECP | AMERICAN EXCAVATING CORP | | | SCAC4 |
| 28 | AECQ | ATEC SYSTEMS LTD | | | SCAC3 |
| 29 | AECQ | ATEC TRANSPORTATION LLC | | | SCAC4 |
| 30 | AECR | AGRICOLA EL CONSUELO | | | SCAC4 |
| 31 | AECR | Atlantic and East Carolina Ry. Co. | | USA | TRAFFIC |
| 32 | AECT | AMERICAN TRANSPORT DIV | | | SCAC3 |
| 33 | AECT | ACE BORDER SOLUTIONS LLC | | | SCAC4 |
| 34 | AECU | AE & CI LTD | | | SCAC3 |
| 35 | AECU | SOUTH AFRICAN NUCLEAR ENERGY CORP, | | | SCAC4 |
| 36 | AECV | AMERI-CAN AUTO TRANSPORT INC | | | SCAC3 |
| 37 | AECV | ADVANCED FREIGHT BROKERS LLC | | | SCAC4 |
| 38 | AECX | Associated Electric Cooperative, Inc. | added 10/1994; 7/2000-7/2005 | | NAKINA |
| 39 | AECX | American Extract Co. | 7/1930-10/1957; eliminated 10/1959 | | NAKINA |
| 40 | AECX | American Extract Co. | 4/38-10/57; eliminated 10/59 | | NRHS |
| 41 | AECX | Associated Electric Cooperative, Inc. | added 10/94; 7/2000 | | NRHS |
| 42 | AECX | *AMERICAN EXTRACT CO. | | | PWRC |
| 43 | AECX | +ASSOCIATED ELECTRIC COOPERATIVE, INC. | | | PWRC |
| 44 | AECX | Associated Electric Cooperative | | | RSRV |
| 45 | AECX | ASSOCIATED ELECTRIC COOPERATIVE INC | | | SCAC4 |
| 46 | AECX | Associated Electric Cooperative, Inc. | | USA | TRAFFIC |
| 47 | AECY | AMERICAN CARGO SYSTEMS INC | | | SCAC3 |
| 48 | AECZ | AMERICAL ELECTRIC COAL | | | PWRC |
