| 1 | ENK | Joint Stock Company Enkor | IATA: 5Z, Callsign: Enkor, IATA designator changed to GZ | RUS | AVCODES |
| 2 | ENK | Joint Stock Company Enkor | IATA: G5, Callsign: Enkor, IATA designator changed to G8. IATA designator changed from 5Z. Designator G5 reinstated by IATA | RUS | AVCODES |
| 3 | ENK | Joint Stock Company Enkor | IATA: G8, Callsign: Enkor, Founded in 1997. Ceased operations in 2004. IATA designator changed from G5. IATA designator changed from 5Z. Designator G5 reinstated by IATA | RUS | AVCODES |
| 4 | ENK | Executive Airlink, Inc. | Callsign: Sunbird, | USA | AVCODES |
| 5 | ENK | Enkor JSC | IATA: G8 | | ICAO1 |
| 6 | ENKI | ENKI INTERNATIONAL | | | SCAC3 |
| 7 | ENKI | ENDURAPAK INC | | | SCAC4 |
| 8 | ENKL | E & K LEASING | | | SCAC3 |