| 1 | FX | Federal Express Corporation d/b/a FedEx | ICAO: FDX, Callsign: Fedex, IATA Prefix: 023, ICAO callsign changed to Express | USA | AVCODES |
| 2 | FX | German Cargo Services GmbH | ICAO: GEC, Callsign: German Cargo, Name changed to Lufthansa Cargo AG w.e.f. 01 May 1993. | D | AVCODES |
| 3 | FX | Svensk Flygtjänst AB | Callsign: Swedair, | S | AVCODES |
| 4 | FX | Four Island Air Ltd. (Antigua) | ICAO: FIA, Callsign: Islandair, Designator FX recalled by IATA | AG | AVCODES |
| 5 | FX | Federal Express Corporation d/b/a FedEx | ICAO: FDX, Callsign: Express, IATA Prefix: 023, ICAO callsign changed from Fedex. IATA designator changed from MB | USA | AVCODES |
| 6 | FX | Faber & Co. | 1/1945-4/1947 | | NAKINA |
| 7 | FX | FABER & CO. | | | PWRC |
| 8 | FXA | Sunrise Airlines, Inc. | Callsign: Effex, Designator OQ* recalled by IATA. ICAO callsign changed to Sundance. Name changed from Express Air, Inc. d/b/a Sunrise Airlines | USA | AVCODES |
| 9 | FXA | Express Air, Inc d/b/a Sunrise Airlines | IATA: OQ, Callsign: Effex, Name changed to Sunrise Airlines Inc | USA | AVCODES |
| 10 | FXA | Sunrise Airlines, Inc. | IATA: OQ, Callsign: Effex, Designator OQ* recalled by IATA. Name changed from Express Air, Inc d/b/a Sunrise Airlines | USA | AVCODES |
| 11 | FXA | Express Air | | | ICAO1 |
| 12 | FXAL | FASTLINE TRANSPORT LLC | | | SCAC4 |
| 13 | FXBC | FOUR SIX ONE THREE FOUR (46134) B C | | | SCAC4 |
| 14 | FXBE | FOXBORO EXPRESS INC | | | SCAC3 |
| 15 | FXBE | FOXBORO EXPRESS INC | | | SCAC4 |
| 16 | FXBS | FLEXIBLE SERVICE COMPANY | | | SCAC3 |
| 17 | FXBT | FAUTEUX, BERNARD TRUCKING | | | SCAC4 |
| 18 | FXC | Fortunair Canada | Callsign: Air Future, Ceased operations | CDN | AVCODES |
| 19 | FXC | Fortunair Canada | | | ICAO1 |
| 20 | FXCC | FREIGHT EXCHANGE CORPORATION, THE | | | SCAC3 |
| 21 | FXCC | FAX CARGO CORPORATION | | | SCAC4 |
| 22 | FXCN | FEGA XPRESS CORPORATION | | | SCAC4 |
| 23 | FXCR | FOX, CORY R INC | | | SCAC4 |
| 24 | FXDO | FREEDOM EXPRESS | | | SCAC4 |
| 25 | FXDS | FLEX DISTRIBUTION SERVICES INC | | | SCAC4 |
| 26 | FXE | Ferrocarril Mexicano, S.D. de C.V. | added 4/1998; 7/2000-7/2005 | | NAKINA |
| 27 | FXE | Ferrocarril Mexicano, S.D. de C.V. | added 4/98; 7/2000 | | NRHS |
| 28 | FXE | FERROCARRIL MEXICANO, SA DE CV | | | PWRC |
| 29 | FXE | Ferromex | | | RSRV |
| 30 | FXE | FERROCARRIL MEXICANO S A DE C V | | | SCAC4 |
| 31 | FXE | Ferrocarril Mexicano, S.D. de C.V. (FerroMex) | | MEX | TRAFFIC |
| 32 | FXES | FRALEX EXPRESS INC | | | SCAC4 |
| 33 | FXEU | FLEX BOX SA DE CV | | MEX | BIC |
| 34 | FXEU | FERROCARRIL MEXICANO SA DE CV (FERR | | | SCAC4 |
| 35 | FXF | Vip Air Charter, Inc. | Callsign: Fox Flight, | USA | AVCODES |
| 36 | FXF | VIP Air Charter | | | ICAO1 |
| 37 | FXFA | FOUR X FOUR | | | SCAC4 |
| 38 | FXFC | FEDEX FREIGHT CANADA CORP | | | SCAC4 |
| 39 | FXFE | FedEx LTL Freight East | | | SCAC2 |
| 40 | FXFE | FOX FREIGHT EXPRESS INC | | | SCAC3 |
| 41 | FXFE | FEDEX FREIGHT (FEDEX FREIGHT EAST I | | | SCAC4 |
| 42 | FXFJ | FIXEL, FRANK J | | | SCAC3 |
| 43 | FXFP | FLEXIBLE FOAM PRODUCTS INC | | | SCAC4 |
| 44 | FXFR | FOX FREIGHTWAYS LIMITED | | | SCAC3 |
| 45 | FXFW | FedEx LTL Freight West (formerly VIKN - Viking) | | | SCAC2 |
| 46 | FXG | Tatonduk Outfitters Ltd. d/b/a Air Cargo Express | IATA: 3K, Callsign: Cargo Express, Name changed to Tatonduk Outfitters Ltd. d/b/a Everts Air Alaska / Everts Air Cargo | USA | AVCODES |
| 47 | FXGI | FIX & GINN MOVING & STORAGE | | | SCAC3 |
| 48 | FXGI | FULL MOON EXPEDITING | | | SCAC4 |
| 49 | FXI | Flugfelag Islands ehf d/b/a Air Iceland | IATA: NY, Callsign: Faxi, IATA Prefix: 882, Name changed to Flugfelag Islands ehf d/b/a Air Iceland Connect. | IS | AVCODES |
| 50 | FXI | Flugfelag Islands ehf d/b/a Air Iceland Connect | IATA: NY, Callsign: Faxi, IATA Prefix: 882, Merged into Icelandair w.e.f. 15 March 2021. Name changed from Flugfelag Islands ehf d/b/a Air Iceland. | IS | AVCODES |
| 51 | FXI | Air Iceland | IATA: NY | | ICAO1 |
| 52 | FXIC | FLX INC | | | SCAC4 |
| 53 | FXIM | FOX INTERMODAL | | | SCAC4 |
| 54 | FXIT | FRIEDMANS EXPRESS INC | | | SCAC3 |
| 55 | FXJ | Flexjet Operations A/S | Callsign: Euroflex, | DK | AVCODES |
| 56 | FXKV | FANTASTIC TRUCKING SERVICE LLC | | | SCAC4 |
| 57 | FXL | Fly Excellent AB | Callsign: Fly Excellent, Declared bankrupt on 14 April 2009. | S | AVCODES |
| 58 | FXL | Fly Excellent | | | ICAO1 |
| 59 | FXLA | FLEX SOLUTIONS | | | SCAC4 |
| 60 | FXLC | FELIX CARDENAS, JUAN BENITO | | | SCAC4 |
| 61 | FXLG | FOX LOGISTICS | | | SCAC4 |
| 62 | FXLL | F/X | | | SCAC4 |
| 63 | FXLU | LATAM BOX COLOMBIA SAS | | CO | BIC |
| 64 | FXMO | FLEX-MOR INDUSTRIES LIMITED | | | SCAC4 |
| 65 | FXMR | FOX-MAR INC | | | SCAC3 |
| 66 | FXNL | FedEx Freight National (formerly Watkins | | | SCAC2 |
| 67 | FXNL | FEDEX NATIONAL LTL INC | | | SCAC4 |
| 68 | FXP | FlyCompass Service S.r.l. | IATA: F6, Callsign: Sundial, Name changed to Buzz Aero S.r.l. Main share holder Valan International Cargo Charter. (Moldova) | RO | AVCODES |
| 69 | FXP | Buzz Aero S.r.l. | IATA: F6, Callsign: Sundial, Name changed from FlyCompass Service S.r.l. | RO | AVCODES |
| 70 | FXPA | FREEDOM XPRESS | | | SCAC4 |
| 71 | FXPC | FRONTIER TRANSPORT INC | | | SCAC4 |
| 72 | FXPD | FOX PICKUP & DELIVERY SERVICE | | | SCAC3 |
| 73 | FXPE | FAST XPRESS INC | | | SCAC3 |
| 74 | FXPG | FEDEX GROUND (BROKERAGE DIV) | | | SCAC4 |
| 75 | FXPI | FLATLAND EXPRESS INC | | | SCAC3 |
| 76 | FXPN | FRONTIER EXPRESS INC | | | SCAC3 |
| 77 | FXPR | FLEET XPRESS | | | SCAC3 |
| 78 | FXPR | FREEDOM XPRESS LLC | | | SCAC4 |
| 79 | FXPS | FREIGHT EXPEDITED SERVICE INC OF MI | | | SCAC3 |
| 80 | FXPT | FLEE TRANSPORTATION | | | SCAC4 |
| 81 | FXPY | FRITH XPRESS | | | SCAC4 |
| 82 | FXQD | FLEXXIFINGER Q D INDUSTRIES INC | | | SCAC4 |
| 83 | FXR | Foxair | Callsign: Wildfox, Name changed to K-Air S.r.l. | I | AVCODES |
| 84 | FXR | K-Air S.r.l. | Callsign: Wildfox, Name changed from Foxair. Ceased operations. | I | AVCODES |
| 85 | FXR | Foxair | | | ICAO1 |
| 86 | FXRE | F EXPRESS INC | | | SCAC4 |
| 87 | FXRL | FOX, RICHARD L | | | SCAC3 |
| 88 | FXRP | FOX RIVER ENTERPRISES INC | | | SCAC4 |
| 89 | FXRT | FOX RIVER TRUCKING INC | | | SCAC3 |
| 90 | FXSD | FOXS DRYWALL INC | | | SCAC3 |
| 91 | FXSJ | FELIX SANCHEZ, JULIAN | | | SCAC4 |
| 92 | FXSM | FOX SPORT S A DE C V | | | SCAC4 |
| 93 | FXSN | FREIGHT XPRESS SERVICES INC | | | SCAC4 |
| 94 | FXSQ | FREEDOM XPRESS INC | | | SCAC4 |
| 95 | FXST | FOXS TRANSPORT LTD | | | SCAC3 |
| 96 | FXST | FOXS TRANSPORT LTD | | | SCAC4 |
| 97 | FXT | Flexflight ApS | IATA: FZ, | DK | AVCODES |
| 98 | FXT | Flexflight ApS | IATA: W2, IATA designator FZ and Accounting code recalled by IATA | DK | AVCODES |
| 99 | FXT | Flexflight | | | ICAO1 |
| 100 | FXTC | FOX TRANSPORTATION SERVICES INC | | | SCAC4 |
