| 1 | EFC | Emirates Flight Training Academy | Callsign: Al Wasel, | UAE | AVCODES |
| 2 | EFC | Air Mana | | | ICAO1 |
| 3 | EFC | Eisenbahnfreunde Chemnitztal e.V | | DE | VKM |
| 4 | EFCA | E-FREIGHT COURIER LLC | | | SCAC4 |
| 5 | EFCB | Estrada de Ferro Central do Brasil / Central Brazilian Railway | | BR | TRAFFIC |
| 6 | EFCI | EXECUTIVE FREIGHT CONSOLIDATORS | | | SCAC3 |
| 7 | EFCN | EFFICIENT SERVICES INC | | | SCAC3 |
| 8 | EFCN | EASY-FLO CENTRAL VACUUMS LTD | | | SCAC4 |
| 9 | EFCS | EMPIRE TRANSPORTATION LTD | | | SCAC3 |
| 10 | EFCS | EMPIRE TRANSPORTATION LTD | | | SCAC4 |
| 11 | EFCU | FINSTERWALDER CONTAINER GMBH | | D | BIC |
| 12 | EFCU | FINSTERWALDER CONTAINER GMBH | | | SCAC4 |
| 13 | EFCX | Evergreen Freight Car Corp. | added 10/1966; 10/1966-1/1980; eliminated 10/1980 | | NAKINA |
| 14 | EFCX | Evergreen Freight Car Corp. | added 10/66; 10/66-1/80; eliminated 10/80 | | NRHS |
| 15 | EFCX | EVERGREEN FREIGHT CAR CORP. | | | PWRC |
