| 1 | FB | Fine Air Services, Inc. | ICAO: FBF, Callsign: Fine Air, IATA Prefix: 340, Desigantor FB recalled by IATA. Name changed from Fine Airlines, Inc. | USA | AVCODES |
| 2 | FB | Aero France International SA | ICAO: ROF, Callsign: Airof, | F | AVCODES |
| 3 | FB | Guardair A.S. | ICAO: JAP, Callsign: Guard Air, Ceased operations on 30 March 2001. | N | AVCODES |
| 4 | FB | Fine Airlines, Inc. | ICAO: FBF, Callsign: Fine Air, IATA Prefix: 340, Name changed to Fine Air Serivces, Inc. | USA | AVCODES |
| 5 | FB | Balkan Air Tours Ltd. | ICAO: LZB, Callsign: Balkan Tour, Name changed to Bulgaria Air. New State Airline to replace bankrupt Balkan - Bulgarian Airlines. | BG | AVCODES |
| 6 | FB | Ferranti Ltd. | Callsign: Ferranti, Designator FB recalled by IATA | GB | AVCODES |
| 7 | FB | Bulgaria Air | ICAO: LZB, Callsign: Balkan Tour, IATA Prefix: 623, ICAO callsign changed to Flying Bulgaria. Name changed from Balkan Air Tours Ltd. | BG | AVCODES |
| 8 | FB | Bursa Airlines, Inc. | Callsign: Foxtrot Bravo, | TR | AVCODES |
| 9 | FB | Bulgaria Air | ICAO: LZB, Callsign: Flying Bulgaria, IATA Prefix: 623, ICAO callsign changed from Balkan Tour. Name changed from Balkan Air Tours Ltd. | BG | AVCODES |
| 10 | FB | Berlin European U.K. Ltd. | ICAO: RGN, Callsign: Regional, IATA Desigantor changed to WZ | GB | AVCODES |
| 11 | FB | Falsterbanen | 1872 - 1893 | DK | jernbanen.dk |
| 12 | FB | Forchbahn | | CH | TRAFFIC |
| 13 | FB | Forchbahn | | CH | VKM |
| 14 | FBA | Lignes Aeriennes Felou | Callsign: Air Felou, | RMM | AVCODES |
| 15 | FBA | Tunca Havacilik A.S. Bestair | IATA: 5F, ICAO designator changed to BST | TR | AVCODES |
| 16 | FBA | FAB-Air | Ceased Operations in 2007 | KS | AVCODES |
| 17 | FBA | Fly Baghdad | IATA: IF, Callsign: Iraq Express, | IRQ | AVCODES |
| 18 | FBA | Fab Air | | | ICAO1 |
| 19 | FBA | Ferrobaires:(Unidad Ejecutora del Programa Ferroviario Provincial | | RA | TRAFFIC |
| 20 | FBAB | FOUR BOYZ TRUCKING INC | | | SCAC4 |
| 21 | FBAC | F B A CO | | | SCAC3 |
| 22 | FBAL | FABRAL INC | | | SCAC4 |
| 23 | FBAN | FARBER, ANNALIESE | | | SCAC4 |
| 24 | FBAR | FLORIDA BIODIESEL FUELS INC | | | SCAC4 |
| 25 | FBAU | AHLERS LINES NV | | | PWRC |
| 26 | FBAU | Ahlers Lines NV | | | RSRV |
| 27 | FBAU | AHLERS LINES N.V. | | | SCAC3 |
| 28 | FBAU | AHLERS MARITIME SERV | | | SCAC4 |
| 29 | FBB | Fly Armenia Airways LLC | IATA: 9F, Callsign: Yerevan, IATA designator changed to VF. | AM | AVCODES |
| 30 | FBB | Fly Armenia Airways LLC | IATA: VF, Callsign: Yerevan, IATA designator changed from 9F. | AM | AVCODES |
| 31 | FBBC | FIREBIRD BULK CARRIERS INC | | | SCAC4 |
| 32 | FBC | Fly Blue Crane (PTY) Ltd | IATA: 7B, Callsign: Blue Crane, Operations commenced on 01 September 2015. Suspended operations during Febraury 2017 | ZA | AVCODES |
| 33 | FBCA | FERRARA BULK CARRIERS | | | SCAC3 |
| 34 | FBCG | F B CARTAGE | | | SCAC3 |
| 35 | FBCI | FEDERAL BULK CARRIERS INC | | | SCAC3 |
| 36 | FBCK | FARNER-BOCKEN COMPANY | | | SCAC4 |
| 37 | FBCL | FASTBREAK CONSOLIDATORS INC | | | SCAC4 |
| 38 | FBCN | FRIEDMAN BAG CO INC | | | SCAC3 |
| 39 | FBCT | F B C TRUCKING | | | SCAC3 |
| 40 | FBCU | FRESH BOX CONTAINER GMBH | | | SCAC3 |
| 41 | FBCX | Foley Butane Co., Inc. | 1/1950-10/1957; eliminated 4/1960 | | NAKINA |
| 42 | FBCX | Baker Coconut Co. | 7/1923 | | NAKINA |
| 43 | FBCX | Franklin Baker Co. | 7/1930-7/1935 | | NAKINA |
| 44 | FBCX | Franklin Baker Co. | 8/1920 | | NAKINA |
| 45 | FBCX | Foley Butane Co., Inc. | 1/52-10/57 | | NRHS |
| 46 | FBCX | *BAKER COCONUT CO. (FRANKLIN BAKER CO.) | | | PWRC |
| 47 | FBCX | *FOLEY BUTANE CO., INC. | | | PWRC |
| 48 | FBCY | FIBER CYCLE | | | SCAC3 |
| 49 | FBDC | Ford County Historical R.R. Preservation Foundation | 1/1994-7/2005 | | NAKINA |
| 50 | FBDC | Ford County Historical R.R. Preservation Foundation | 1/94-7/2000 | | NRHS |
| 51 | FBDC | FORD COUNTY HISTORICAL RAILROAD PRESERVATION FOUNDATION | | | PWRC |
| 52 | FBDC | Ford County Historical Railroad Preservation Foundation | | | RSRV |
| 53 | FBDC | FORD COUNTY HISTORICAL RAILROAD PRE | | | SCAC3 |
| 54 | FBDK | Falsterbanen | Real: FB, 1872 - 1893 | DK | TRAFFIC |
| 55 | FBDN | FINER BY DESIGN | | | SCAC4 |
| 56 | FBDT | FIREBIRD TRANSPORTATION | | | SCAC4 |
| 57 | FBDV | FIBERS DIVISION TRUCKING (DIV OF AL | | | SCAC3 |
| 58 | FBE | Pan African Airlines Leasing Company Ltd | Callsign: Afribee, | MUS | AVCODES |
| 59 | FBE | Ferropolis Bergbau- und Erlebnisbahn e.V. | Gräfenhainichen | D | privat-bahn.de |
| 60 | FBEA | FIREBALL EXPRESS INC | | | SCAC4 |
| 61 | FBEC | FLORABEC INC | | | SCAC4 |
| 62 | FBED | FLAT-BED SERVICES INC | | | SCAC4 |
| 63 | FBEE | First Beeline | | GB | TRAFFIC |
| 64 | FBEI | FIBERTEX INDUSTRIES INC | | | SCAC3 |
| 65 | FBEN | F & B ENGINEERINNG INC | | | SCAC3 |
| 66 | FBEP | FAIRBURN EXPRESS INC | | | SCAC4 |
| 67 | FBEQ | FLORIDA BEAUTY EXPRESS INC | | | SCAC4 |
| 68 | FBET | FRANKLIN, BEN TRANSPORTATION INC | | | SCAC3 |
| 69 | FBF | Fine Air Services, Inc. | Callsign: Fine Air, Desigantor FB recalled by IATA. Name changed from Fine Airlines, Inc. | USA | AVCODES |
| 70 | FBF | Fine Air Services, Inc. | IATA: FB, Callsign: Fine Air, IATA Prefix: 340, Desigantor FB recalled by IATA. Name changed from Fine Airlines, Inc. | USA | AVCODES |
| 71 | FBF | Fine Airlines, Inc. | IATA: FB, Callsign: Fine Air, IATA Prefix: 340, Name changed to Fine Air Serivces, Inc. | USA | AVCODES |
| 72 | FBF | Fine Airlines | | | ICAO1 |
| 73 | FBF | Frenzel-Bau GmbH&Co. KG | | DE | VKM |
| 74 | FBFA | FARMER BOY FUEL SUPPLY | | | SCAC4 |
| 75 | FBFC | FRANK BROS FUEL CORP | | | SCAC4 |
| 76 | FBFE | FLATBED FREIGHT EXPRESS COMPANY | | | SCAC3 |
| 77 | FBFI | FASTBALL FREIGHT INC | | | SCAC4 |
| 78 | FBFO | FEBRUARY FOURTEEN INC | | | SCAC4 |
| 79 | FBFS | FBF SERVICES CORP | | | SCAC4 |
| 80 | FBFU | MARINE TRANSWORLD EQUIP. CORP. | | | PWRC |
| 81 | FBFU | Marine Transworld Equipment Corporation | | | RSRV |
| 82 | FBG | Fleet Air BG | Callsign: Fleet Big, | BG | AVCODES |
| 83 | FBGP | F B G TRANSPORT | | | SCAC3 |
| 84 | FBGS | FOWLER BOTTLE GAS SERVICE INC | | | SCAC3 |
| 85 | FBGT | F B G TRANSPORT | | | SCAC3 |
| 86 | FBHH | FRAN-BAR HEAVY HAUL INC | | | SCAC4 |
| 87 | FBIA | FORMULA BRANDS INC | | | SCAC4 |
| 88 | FBIB | FREIGHT BOOK INC | | | SCAC4 |
| 89 | FBIC | F & B INC | | | SCAC4 |
| 90 | FBIF | FBI FLOWERS | | | SCAC4 |
| 91 | FBIK | FERRER BROKERS INC | | | SCAC4 |
| 92 | FBIN | FEDERAL BUILDERS INC | | | SCAC3 |
| 93 | FBIO | FARM BOY INC | | | SCAC4 |
| 94 | FBIQ | FAITH BROADCASTING INC | | | SCAC4 |
| 95 | FBIR | F B I TOURS | | | SCAC3 |
| 96 | FBIT | FBT TRUCKING | | | SCAC3 |
| 97 | FBIU | FLORENS ASSET MANAGEMENT COMPANY LIMITED | | HK | BIC |
| 98 | FBIU | FLORENS CONTAINER SERVICES COMPANY | | | SCAC4 |
| 99 | FBJ | Baby Jet Airlines Limied | Callsign: Baby Jet, | GH | AVCODES |
| 100 | FBJL | FLIGHTIME BUSINESS JETS LLC | | | SCAC4 |
