| 1 | EFS | Europe Falcon Service | Callsign: Air Falcon, ICAO designator changed to DSO. Designator FK recalled by IATA | F | AVCODES |
| 2 | EFS | Efaos, Agencia de Viagens e Turismo, Lda | Callsign: Efaos, | ANG | AVCODES |
| 3 | EFS | Europe Falcon Service | IATA: FK, Designator FK recalled by IATA | F | AVCODES |
| 4 | EFS | EFAOS- Agencia De Viagens e Turismo | | | ICAO1 |
| 5 | EFS | Eisenbahnfreunde Traditions-Bw Staßfurt e.V. | Staßfurt | D | privat-bahn.de |
| 6 | EFS | Estrada de Ferro Sorocabana | | BR | TRAFFIC |
| 7 | EFSA | EFSA SA | | CH | TRAFFIC |
| 8 | EFSA | EFSA SA | | CH | VKM |
| 9 | EFSB | ELITE FREIGHT SERVICES LLC | | | SCAC4 |
| 10 | EFSC | EPTALOFOS SHIPPING CORPORATION | | | SCAC3 |
| 11 | EFSC | EMPACADORA FRUTEXPORT SA DE CV | | | SCAC4 |
| 12 | EFSF | ENHANCED FUEL SOLUTIONS | | | SCAC4 |
| 13 | EFSFT | Eisenbahnfreunde Traditionsbahnbetriebswerk Straßfurt e.V. | | DE | VKM |
| 14 | EFSG | EASTERN FOOD SALES OF GREENSBORO IN | | | SCAC3 |
| 15 | EFSG | ERICKSON FARMS TRUCKING INC | | | SCAC4 |
| 16 | EFSI | EFSHIPPING COMPANY SA PANAMA | | | SCAC4 |
| 17 | EFSJ | Estrada de Ferro Santos a Jundiaí | | BR | TRAFFIC |
| 18 | EFSK | Eisenbahnfreunde Schwalm - Knüll e.V. | Treysa | D | privat-bahn.de |
| 19 | EFSK | ELITE FREIGHT SERVICES INC | | | SCAC4 |
| 20 | EFSK | EVU Eisenbahnfreunde Schwalm-Knüll e.V | | DE | VKM |
| 21 | EFSM | ELITE FREIGHT SYSTEMS INC | | | SCAC4 |
| 22 | EFSN | EXPRESS FREIGHT SYSTEMS INCORPORATE | | | SCAC3 |
| 23 | EFSS | ENTERPRISE FREIGHT SYSTEMS, INC | | | SCAC3 |
| 24 | EFSS | ENTERPRISE FREIGHT SYSTEMS INC | | | SCAC4 |
| 25 | EFSV | EXPEDITED FREIGHT SERVICE INC | | | SCAC3 |
| 26 | EFSV | E FREIGHT SOLUTIONS INC | | | SCAC4 |
