| 1 | ENI | Enimex Ltd. | Callsign: Enimex, Founded in 1994. Ceased operations during 2008. | EST | AVCODES |
| 2 | ENI | Enimex | | | ICAO1 |
| 3 | ENIC | Enid Central Ry., Inc. | added 7/1982; eliminated 5/1983 | | NAKINA |
| 4 | ENIC | Enid Central Ry., Inc. | added 7/82; eliminated 5/83 | | NRHS |
| 5 | ENIC | ENID CENTRAL RAILROAD | | | PWRC |
| 6 | ENIE | ENNIS ENTERPRISES | | | SCAC3 |
| 7 | ENIH | ENI SHIPPING INC | | | SCAC4 |
| 8 | ENIK | E N E IKARIA LIMITED | | | SCAC3 |
| 9 | ENIS | ENNIS TRANSPORTATION CO INC | | | SCAC3 |
| 10 | ENIS | ENNIS TRANSPORTATION CO INC | | | SCAC4 |
| 11 | ENIW | EMPIRE NAVIGATION INC | | | SCAC4 |
