| 1 | EK | Emirates | ICAO: UAE, Callsign: Emirates, IATA Prefix: 176, | UAE | AVCODES |
| 2 | EK | Euralair International | ICAO: EUI, | F | AVCODES |
| 3 | EK | East Kentucky Southern Ry. Co. | 7/1930-7/1932 | | NAKINA |
| 4 | EK | Eastern Kentucky Ry. Co. | 8/1920-7/1923 | | NAKINA |
| 5 | EK | Eisenbahn Kurier GmbH | Freiburg | D | privat-bahn.de |
| 6 | EK | EASTERN KENTUCKY SOUTHERN RAILWAY [EASTERN KENTUCKY RAILWAY] | | | PWRC |
| 7 | EK | Eastern Kentucky Railway (Eastern Kentucky Southern Railway) | | | RSRV |
| 8 | EK | EisenbahnKurier | | D | TRAFFIC |
| 9 | EKA | Equaflight Service | IATA: 8H, Callsign: Equaflight, Designator 8H* recalled by IATA. Designator 8H* reinstated by IATA | RCB | AVCODES |
| 10 | EKA | Equaflight Service | IATA: 5E, Callsign: Equaflight, Designator 8H* recalled by IATA. Designator 8H* reinstated by IATA | RCB | AVCODES |
| 11 | EKA | Equaflight Service | IATA: E7, Callsign: Equaflight, | RCB | AVCODES |
| 12 | EKA | Equaflight Service | | | ICAO1 |
| 13 | EKAD | E K & D INC | | | SCAC3 |
| 14 | EKAD | EFFINGHAM TRUCKING CO | | | SCAC4 |
| 15 | EKAI | EMIKA INC | | | SCAC4 |
| 16 | EKAL | EKA TRANSPORTES SA DE CV | | | SCAC4 |
| 17 | EKAQ | EKATO CORPORATION | | | SCAC3 |
| 18 | EKAT | EUREKA TRUCK LINES | | | SCAC4 |
| 19 | EKAT | Awtotransport Ekaterinburg | | RUS | TRAFFIC |
| 20 | EKAU | EKA CHEMICALS AB | | | SCAC4 |
| 21 | EKBJ | EKBERG, JOHN | | | SCAC3 |
| 22 | EKBJ | EDGE TRUCKING INC | | | SCAC4 |
| 23 | EKBT | EKBERG, ROY TRUCKING | | | SCAC3 |
| 24 | EKBT | ENW TRUCKING INC | | | SCAC4 |
| 25 | EKBU | CONTMASTER | | RUS | BIC |
| 26 | EKBU | KEISERLING (UK), LTD | | | PWRC |
| 27 | EKBU | Keiserling | | | RSRV |
| 28 | EKC | East Kansas City Aviation, Inc. | Callsign: Blue Goose, | USA | AVCODES |
| 29 | EKC | East Kansas City Aviation | | | ICAO1 |
| 30 | EKCO | EKCO METALS | | | SCAC3 |
| 31 | EKCO | EKCO METALS | | | SCAC4 |
| 32 | EKCR | ECKSTINE, CHARLES R | | | SCAC3 |
| 33 | EKCR | EASTMARK ASSOCIATES INC | | | SCAC4 |
| 34 | EKCU | VAN DEN BOSCH TRANSPORTE GMBH | | A | BIC |
| 35 | EKCU | FRIEDRICH EISENKECK SILOTRANSPORTE | | | SCAC3 |
| 36 | EKCU | SILO-TANK TRANSPORTE GMBH | | | SCAC4 |
| 37 | EKCX | Eastman Kodak Co. | 7/1935-1/1952; eliminated 7/1953 | | NAKINA |
| 38 | EKCX | Eastman Kodak Co. | 4/38-1/52 | | NRHS |
| 39 | EKCX | EASTMAN KODAK CO. | | | PWRC |
| 40 | EKCZ | EAST KENTUCKY COAL DOCKS | | | PWRC |
| 41 | EKDE | ELKINK, DEZ | | | SCAC4 |
| 42 | EKDF | ECKERD FLEET INC | | | SCAC3 |
| 43 | EKDN | ERICKSON, DALLAS E INC | | | SCAC4 |
| 44 | EKEH | EIBEN, KEITH | | | SCAC4 |
| 45 | EKEL | ELMA-K ENTERPRISES LTD | | | SCAC4 |
| 46 | EKER | ERICKEYAS TRUCKING | | | SCAC4 |
| 47 | EKFS | ECKERT FARM SUPPLY | | | SCAC3 |
| 48 | EKG | Afric Aviation | IATA: L8, | G | AVCODES |
| 49 | EKGL | EDMAN TRUCKING LTD | | | SCAC4 |
| 50 | EKGN | ENNA TRUCKING COMPANY | | | SCAC3 |
| 51 | EKGT | EKBERG, GLENN E TRUCKING | | | SCAC3 |
| 52 | EKGT | EKG TRUCKING INC | | | SCAC4 |
| 53 | EKHN | ELKHORN EXPRESS | | | SCAC4 |
| 54 | EKHU | EURO-KAI KG | | | SCAC3 |
| 55 | EKHW | E & K HAZARDOUS WASTE SERVICES INC | | | SCAC3 |
| 56 | EKIC | E K INC | | | SCAC4 |
| 57 | EKII | ERICKSON IMPLEMENT INC | | | SCAC4 |
| 58 | EKIN | EAKIN TRUCKING | | | SCAC3 |
| 59 | EKIQ | ENTREPRISE KEVMIG INC | | | SCAC4 |
| 60 | EKJ | Equajet | Callsign: Equajet, | RCB | AVCODES |
| 61 | EKJ | Ängelholm - Klippan Järnväg (Pyttebanan) | 1904 - 1928 | S | svenska-lok.se |
| 62 | EKJ | Ängelholm - Klippan Järnväg (Pyttebanan) | 1904 - 1928 | S | TRAFFIC |
| 63 | EKJD | EKSTROM, J D INC | | | SCAC3 |
| 64 | EKKW | Europejskie Konsorcjum Kolejowe WAGON Sp. z o.o. | | PL | VKM |
| 65 | EKLC | ECKLUND CARRIERS INC | | | SCAC3 |
| 66 | EKLD | EKLUND TRUCKING | | | SCAC3 |
| 67 | EKLF | ECKLOF TRANSPORTATION CO | | | SCAC3 |
| 68 | EKLQ | ECKLER TRUCKING | | | SCAC3 |
| 69 | EKLU | KAWASAKI KISEN KAISHA LTD - K LINE | | J | BIC |
| 70 | EKLU | K LINE | | | PWRC |
| 71 | EKLU | K Line | | | RSRV |
| 72 | EKLU | KAWASAKI KISEN KAISHA LTD | | | SCAC4 |
| 73 | EKMT | E K MACHINE & TOOL INC | | | SCAC4 |
| 74 | EKMX | Emmons Coal Mining Co. | 7/1923 | | NAKINA |
| 75 | EKMX | EMMONS COAL MINING CO. | | | PWRC |
| 76 | EKNA | EUREKA SPRINGS & NORTH ARKANSAS RAILROAD | | | PWRC |
| 77 | EKNE | ECKSTROM, NEIL TRUCKING INC | | | SCAC3 |
| 78 | EKNK | ERIKSON TRUCKING | | | SCAC4 |
| 79 | EKNS | ECKHART & SONS | | | SCAC3 |
| 80 | EKO | Aeroeko | Callsign: Concise, | KZ | AVCODES |
| 81 | EKO | ECO Airlines SIA | Callsign: Ecoair, | LV | AVCODES |
| 82 | EKO | EKO Transportgesellschaft mbH | Eisenhüttenstadt (EKO = Eisenhüttenkombinat Oder) | D | privat-bahn.de |
| 83 | EKO | EKO Transportgesellschaft mbH | | D | TRAFFIC |
| 84 | EKO | ArcelorMittal Eisenhüttenstadt Transport GmbH | | DE | VKM |
| 85 | EKOBG | EKO Bulgaria | | BG | VKM |
| 86 | EKOH | EKOH INC | | | SCAC3 |
| 87 | EKOL | EKO LOGISTICS CARGO LLC | | | SCAC4 |
| 88 | EKOM | EKO MANUFACTURING CORP | | | SCAC4 |
| 89 | EKOR | EUROKOR LOGISTICS B V | | | SCAC4 |
| 90 | EKOSK | ŽOS-EKO, s.r.o. | | SK | VKM |
| 91 | EKOU | FORTUM WASTE SOLUTIONS OY | | FIN | BIC |
| 92 | EKP | Small Enterprise (Ecopatroil) | Callsign: Ecopatrol, Ceased operations | UA | AVCODES |
| 93 | EKPI | EMPIRE KOSHER POULTRY INC | | | SCAC3 |
| 94 | EKPY | EMPIRE KOSHER POULTRY INC | | | SCAC4 |
| 95 | EKRE | EKRE TRUCKING | | | SCAC3 |
| 96 | EKRQ | ECKERTS VAN & STORAGE | | | SCAC3 |
| 97 | EKRQ | ECKERT VAN & STORAGE | | | SCAC4 |
| 98 | EKRT | ECKERT TRUCK LINE | | | SCAC3 |
| 99 | EKRV | ELK VALLEY RANCHES INC | | | SCAC4 |
| 100 | EKSO | ERICKSON TRUCKING | | | SCAC3 |
