| 1 | AEP | Aerotec Escuela de Pilotos, SL | Callsign: Aerotec, | E | AVCODES |
| 2 | AEP | Compania Aero Transportes Panamenos | Callsign: Aepsa, | PA | AVCODES |
| 3 | AEP | Aerotec | | | ICAO1 |
| 4 | AEPB | AMES EXPRESS INC | | | SCAC3 |
| 5 | AEPC | A & E TRANSPORT INC | | | SCAC3 |
| 6 | AEPC | ABC EXPRESS COURIERS INC | | | SCAC4 |
| 7 | AEPD | ACTION EXPEDITING INC | | | SCAC4 |
| 8 | AEPF | ADINS EXPEDITING LLC | | | SCAC4 |
| 9 | AEPH | AMERICA PACIFIC CONTAINER LINE INC | | | SCAC4 |
| 10 | AEPI | ALLSTATE TRANSPORTATION CO INC | | | SCAC3 |
| 11 | AEPI | AMC EXPRESS INC | | | SCAC4 |
| 12 | AEPM | AMES TRANSPORTATION SYSTEMS INC | | | SCAC3 |
| 13 | AEPN | AMREP INC | | | SCAC3 |
| 14 | AEPO | A E EXPRESS | | | SCAC3 |
| 15 | AEPQ | AEP INDUSTRIES INC | | | SCAC3 |
| 16 | AEPR | ALTI EXPRESS | | | SCAC4 |
| 17 | AEPS | AMERICAN ELECTRIC POWER SERVICE CORPORATION | | | PWRC |
| 18 | AEPT | ADEPT TRANSPORT INC | | | SCAC3 |
| 19 | AEPT | ARCTIC EQUIPMENT MANUFACTURING CORP | | | SCAC4 |
| 20 | AEPU | AMERICAN LINES INC. | | | PWRC |
| 21 | AEPU | American Lines | | | RSRV |
| 22 | AEPU | AMERICAN LINES | | | SCAC3 |
| 23 | AEPU | AMERICAN LINES | | | SCAC4 |
| 24 | AEPV | ALLIED EXPRESS | | | SCAC3 |
| 25 | AEPW | AEP TRANSPORTATION INC | | | SCAC4 |
| 26 | AEPX | American Electric Power Service Corp. | added 4/1975; 1/1980-7/2005 | | NAKINA |
| 27 | AEPX | American Electric Power Service Corp. (cars being restencilled from APWX) | 1/1975 | | NAKINA |
| 28 | AEPX | Appalachian Power Co. | added 10/1958; 4/1961-4/1970; eliminated 4/1975 | | NAKINA |
| 29 | AEPX | Appalachian Electric Power Co. | 1/1943-10/1957; eliminated 10/1958 | | NAKINA |
| 30 | AEPX | Appalachian Electric Power Co. | 1/52-10/57; eliminated 10/58 | | NRHS |
| 31 | AEPX | Appalachian Power Co. | added 10/58; 4/61-4/70; eliminated 4/75 | | NRHS |
| 32 | AEPX | American Electric Power Service Corp. (cars being restencilled from APWX) | Jan-75 | | NRHS |
| 33 | AEPX | American Electric Power Service Corp. | added 4/75; 1/80-7/2000 | | NRHS |
| 34 | AEPX | AMERICAN ELECTRIC POWER SERVICE CORPORATION [APPALACHIAN POWER] | | | PWRC |
| 35 | AEPX | American Electric Power Service Corporation | | | RSRV |
| 36 | AEPZ | AEP COAL TERMINAL | | | PWRC |