| 1 | EPN | Europlane, S.L. | Callsign: Europlane, | E | AVCODES |
| 2 | EPNC | EPIC TRANS LLC | | | SCAC4 |
| 3 | EPNL | ECONOMY PROPANE LLC | | | SCAC4 |
| 4 | EPNP | ENAMEL PRODUCTS & PLATING COMPANY | | | SCAC3 |
| 5 | EPNS | ESPOSITO AND SONS FREIGHT LINES, INC | | | SCAC3 |
| 6 | EPNS | ESPOSITO AND SONS FREIGHT LINES INC | | | SCAC4 |
| 7 | EPNX | El Paso Natural Gas Co. | 1/1952-10/1957; eliminated 7/1959 | | NAKINA |
| 8 | EPNX | El Paso Natural Gas Co. | 1/52-10/57; eliminated 7/59 | | NRHS |
| 9 | EPNX | EL PASO NATURAL GAS CO. | | | PWRC |
