| 5301 | FPDX | FOREST PRODUCTS CHEMICAL CO. | | | PWRC |
| 5302 | FPDY | F P DUFFY INC | | | SCAC4 |
| 5303 | FPE | (The) Fairport, Painesville & Eastern R.R. Co. | 7/1936-10/1966 & 1/1975-1/1980; eliminated 10/1984 | | NAKINA |
| 5304 | FPE | Fairport, Painesville & Eastern R.R. Co. | 4/38-10/66 & 1/75-1/80; eliminated 10/84 | | NRHS |
| 5305 | FPE | FAIRPORT, PAINESVILLE & EASTERN RAILROAD CO. | | | PWRC |
| 5306 | FPEC | FIVE POINTS EXPRESS CARTAGE | | | SCAC4 |
| 5307 | FPEN | FREEPORT ENTERPRISE | | | SCAC3 |
| 5308 | FPEU | AXENS | | F | BIC |
| 5309 | FPEU | AXENS | | | SCAC4 |
| 5310 | FPFX | NorRail, Inc. | added 4/1997; eliminated 10/1999 | | NAKINA |
| 5311 | FPFX | Foster Poultry Farms, Inc. | added 4/1980; 1/1994; eliminated 4/1997 | | NAKINA |
| 5312 | FPFX | Foster Poultry Farms, Inc. | added 4/80; 1/94; eliminated 4/97 | | NRHS |
| 5313 | FPFX | NorRail, Inc. | added 4/97; eliminated 10/99 | | NRHS |
| 5314 | FPFX | NORRAIL INCORPORATED [FOSTER POULTRY FARMS, INC.] | | | PWRC |
| 5315 | FPFX | FOSTER POULTRY FARMS, INC. | | | SCAC4 |
| 5316 | FPG | TAG Aviation, S.A. | IATA: FP, Callsign: TAG Aviation, Designator FP recalled by IATA. Name changed from Aeroleasing, S.A. | CH | AVCODES |
| 5317 | FPG | Aeroleasing, S.A. | IATA: FP, Callsign: Aeroleasing, Name changed to TAG Aviation, S.A. ICAO callsign changed from Fox Papa | CH | AVCODES |
| 5318 | FPG | Aeroleasing, S.A. | IATA: FP, Callsign: Fox Papa, ICAO callsign changed to Aeroleasing | CH | AVCODES |
| 5319 | FPG | TAG Aviation, S.A. | Callsign: TAG Aviation, Designator FP recalled by IATA. Name changed from Aeroleasing, S.A. | CH | AVCODES |
| 5320 | FPG | TAG Aviation | | | ICAO1 |
| 5321 | FPG | TAG Aviation | | CH | TRAFFIC |
| 5322 | FPGT | FERGUSON, PAUL G TRUCKING INC | | | SCAC3 |
| 5323 | FPGX | Freeport Gas Co. (Freeport Asphalt Co.) | 7/1923 | | NAKINA |
| 5324 | FPGX | FREEPORT ASPHALT CO. [FREEPORT GAS CO.] | | | PWRC |
| 5325 | FPHC | FLYING PHOENIX CORP | | | SCAC4 |
| 5326 | FPHK | FLIWAY PARK (HONG KONG) LTD. | | | SCAC3 |
| 5327 | FPI | flyPersia | Callsign: Persia, Commenced operations in December 2019. | IR | AVCODES |
| 5328 | FPIA | F P INTERNATIONAL | | | SCAC4 |
| 5329 | FPIC | FAST PITCH COURIER | | | SCAC3 |
| 5330 | FPIC | FREIGHTPORT INC | | | SCAC4 |
| 5331 | FPID | FAST PITCH COURIER OF IDAHO | | | SCAC4 |
| 5332 | FPIQ | FISHER, PAUL INC | | | SCAC4 |
| 5333 | FPIT | FRUTH, PAT INC | | | SCAC4 |
| 5334 | FPIY | FRANKLIN PRECISION INDUSTRY INC | | | SCAC4 |
| 5335 | FPJI | FLYNN, P J INC | | | SCAC3 |
| 5336 | FPK | M/S Air Falcon (Pvt) Ltd. | IATA: FS, Callsign: Feather, IATA Prefix: 785, | PK | AVCODES |
| 5337 | FPKI | FRUEH, PETER K INC | | | SCAC4 |
| 5338 | FPKX | Frazier Packing Corp. | 7/1935 | | NAKINA |
| 5339 | FPL | Flight Precision Limited | Callsign: Midcal, ICAO designator changed to CLB | GB | AVCODES |
| 5340 | FPL | Freightliner PL Sp. z o.o. | | PL | VKM |
| 5341 | FPLB | FR8PRO LOGISTICS LLC | | | SCAC4 |
| 5342 | FPLC | FIRST PLACE TRANSPORTATION INC | | | SCAC4 |
| 5343 | FPLD | FRONTERA PRODUCE LTD | | | SCAC4 |
| 5344 | FPLE | FOUR (4) PL | | | SCAC4 |
| 5345 | FPLL | FOURPLEX (4PLEX) LOGISTICS LLC | | | SCAC4 |
| 5346 | FPLN | F P L N EQUIPMENT EXCHANGE OF CANAD | | | SCAC4 |
| 5347 | FPLS | FOURE PRO TRANSPORTATION SYSTEMS | | | SCAC4 |
| 5348 | FPLT | FIRST (1ST) PRIORITY LOGISTICS LTD | | | SCAC4 |
| 5349 | FPLV | FREEPORT LNG DEVELOPMENT LP | | | SCAC4 |
| 5350 | FPLX | Frontenac Pipe Line Co. | 1/1943-1/1946 | | NAKINA |
| 5351 | FPLX | *FRONTENAC PIPE LINE CO. | | | PWRC |
| 5352 | FPLX | *FLORIDA POWER & LIGHT | | | PWRC |
| 5353 | FPMI | FP MARANGONI INC | | | SCAC4 |
| 5354 | FPMU | FORMOSA PLASTICS MARINE CORP | | RC | BIC |
| 5355 | FPMU | FORMOSA PLASTIS MARINE CORPORATION | | | SCAC4 |
| 5356 | FPN | Ferrocarriles Nacionales de Mexico | added 4/1996; 7/2000-7/2005 | | NAKINA |
| 5357 | FPN | Ferrocarriles Nacionales de Mexico | added 4/96; 7/2000 | | NRHS |
| 5358 | FPN | FERROCARRILES NACIONALES DE MEXICO | | | PWRC |
| 5359 | FPN | Ferrocarriles Nacionales de Mexico | | | RSRV |
| 5360 | FPNC | FORMOSA PLASTICS NAVIGATION CORP | | | SCAC3 |
| 5361 | FPNC | FORMOSA PLASTICS NAVIGATION CORP | | | SCAC4 |
| 5362 | FPNE | FOAM PLASTICS OF NEW ENGLAND INC | | | SCAC3 |
| 5363 | FPNS | FRESHPOINT NORTH FLORIDA & FRESHPOI | | | SCAC4 |
| 5364 | FPO | Société Financiereale (S.F.A.) | Callsign: French Post, Name change to Europe Airpost | F | AVCODES |
| 5365 | FPO | Europe Airpost | IATA: 5O, Callsign: French Post, IATA Prefix: 558, Name changed to ASL Airlines France S.A. Name change from Societe Financiereale (S.F.A.) | F | AVCODES |
| 5366 | FPO | ASL Airlines France S.A. | IATA: 5O, Callsign: French Post, IATA Prefix: 558, Name changed from Europe Airpost. Name change from Societe Financiereale (S.F.A.) | F | AVCODES |
| 5367 | FPO | Europe Airpost | | | ICAO1 |
| 5368 | FPOR | FREEPORT TRUCKING CO INC | | | SCAC3 |
| 5369 | FPOT | FREEPORT TRANSPORTATION INC | | | SCAC4 |
| 5370 | FPOU | FREEPORT GASES LTD | | BS | BIC |
| 5371 | FPOU | FREEPORTGASES LTD | | | SCAC4 |
| 5372 | FPOX | Frost Paint & Oil Corp. | 1/1950 | | NAKINA |
| 5373 | FPOX | FROST PAINT & OIL CORP. | | | PWRC |
| 5374 | FPPX | Fayette Power Project | added 10/1978; 1/1980-7/2005 | | NAKINA |
| 5375 | FPPX | Fayette Power Project | added 10/78; 1/80-7/2000 | | NRHS |
| 5376 | FPPX | FAYETTE POWER PROJECT | | | PWRC |
| 5377 | FPPX | Fayette Power Project | | | RSRV |
| 5378 | FPPX | FAYETTE POWER PROJECT | | | SCAC4 |
| 5379 | FPR | Fuerza Aerea Del Peru | | PE | AVCODES |
| 5380 | FPR | Peruvian Air Force | | | ICAO1 |
| 5381 | FPR | Fordyce & Princeton | Real: FP | USA | TRAFFIC |
| 5382 | FPRA | FARMERS PROPANE | | | SCAC4 |
| 5383 | FPRC | FISHER-PRICE (DIVISION OF THE QUAKE | | | SCAC3 |
| 5384 | FPRD | FUSION PRODUCTIONS | | | SCAC4 |
| 5385 | FPRR | Fordyce & Princeton R.R. Co. | Real: FP | USA | TRAFFIC |
| 5386 | FPS | Flightpass Ltd. | Callsign: Flightpass, Ceased operations. | GB | AVCODES |
| 5387 | FPS | Flightpass Limited | | | ICAO1 |
| 5388 | FPS | Ferrovia Parma Suzzara | integrated into FER: Ferrovie Emilia Romagna | I | TRAFFIC |
| 5389 | FPSC | F P SPACE CORP | | | SCAC3 |
| 5390 | FPSE | FAILURE PREVENTION SERVICES | | | SCAC4 |
| 5391 | FPSG | FLYNN, PAT & SONS TRUCKING INC | | | SCAC4 |
| 5392 | FPSG | Ferrovia Porto San Giorgio-Amandola | | I | TRAFFIC |
| 5393 | FPSI | FRANKS PARCEL SERVICE INC | | | SCAC3 |
| 5394 | FPSL | FPS LOGISTIC (USA) INC | | | SCAC4 |
| 5395 | FPSM | FAMOUS PACIFIC SHIPPING (SHENZHEN) | | | SCAC4 |
| 5396 | FPSP | FIRST PACIFIC CORP & SECOND PACIFIC | | | SCAC3 |
| 5397 | FPSP | FLUID POWER SYSTEMS SA DE CV | | | SCAC4 |
| 5398 | FPSQ | FIVE POINTS SERVICES INC | | | SCAC4 |
| 5399 | FPSS | FISHER PIPE & STEEL INC | | | SCAC3 |
| 5400 | FPSS | FAIRPLAY SERVICES S A | | | SCAC4 |
