| 3301 | RF&P | RICHMOND, FREDERICKSBURG & POTOMAC RR (NOW CSX TRANSPORTATION) | | | PWRC |
| 3302 | RFA | Raleigh Flying Service, Inc. | Callsign: Raleigh Service, | USA | AVCODES |
| 3303 | RFA | Al-Rafedain Falcon Air Cargo | | IRQ | AVCODES |
| 3304 | RFA | Raleigh Flying Service | | | ICAO1 |
| 3305 | RFAA | ROBINSON FARMS | | | SCAC4 |
| 3306 | RFAB | REMFILS A-2-B TRANSPORT | | | SCAC4 |
| 3307 | RFAC | REFRIGERADOS ACEVEDO | | | SCAC4 |
| 3308 | RFAE | U. S. DEPT. OF ENERGY ROCKY FLATS PLANT | | | PWRC |
| 3309 | RFAK | REMARK FARMS | | | SCAC4 |
| 3310 | RFAR | RITTER FARMS | | | SCAC4 |
| 3311 | RFAV | RICKS FRAME AND COLLISION SERVICE | | | SCAC4 |
| 3312 | RFB | Ringe - Fåborg Banen (Fåborgbanen) | 1882 - 1962 | DK | jernbanen.dk |
| 3313 | RFB | Ringe - Fåborg Banen (Fåborgbanen) | 1882 - 1962 | DK | TRAFFIC |
| 3314 | RFB | ROMPLUMB SA | | RO | VKM |
| 3315 | RFBD | RALCORP FROZEN BAKERY PRODUCTS | | | SCAC4 |
| 3316 | RFBG | RIFENBURG TRUCKING INC | | | SCAC4 |
| 3317 | RFBI | REXIUS FOREST BY-PRODUCTS INC | | | SCAC4 |
| 3318 | RFBK | RAPID FREIGHT BROKER SOLUTIONS | | | SCAC4 |
| 3319 | RFBL | REFRIGERADOS BALDERAS | | | SCAC4 |
| 3320 | RFBP | REXIUS FOREST BY-PRODUCTS INC | | | SCAC3 |
| 3321 | RFBS | REGIONAL FLATBED SERVICE LLC | | | SCAC4 |
| 3322 | RFBU | BIMICON CONTAINER SERVICE GMBH | | D | BIC |
| 3323 | RFBV | ROWE FREIGHT BROKER SERVICES LLC | | | SCAC4 |
| 3324 | RFC | Aero Africa (Pty) Ltd | Callsign: Aero Africa, Ceased operations on 01 March 2010. | SD | AVCODES |
| 3325 | RFC | Aero Africa | | | ICAO1 |
| 3326 | RFCA | R & F CARRIERS LLC | | | SCAC4 |
| 3327 | RFCD | ROADMASTER FREIGHT COMPANIES LLC | | | SCAC4 |
| 3328 | RFCF | RELIABLE FREIGHT CARRIERS | | | SCAC4 |
| 3329 | RFCG | RIVERFRONT CARTAGE COMPANY OF OHIO | | | SCAC3 |
| 3330 | RFCI | ROYAL FREIGHT CARRIERS INC | | | SCAC3 |
| 3331 | RFCM | ROUSSEAU FARMING CO | | | SCAC4 |
| 3332 | RFCN | R F C WORLD WIDE INC | | | SCAC3 |
| 3333 | RFCN | ROCKLAND FUEL CARRIER | | | SCAC4 |
| 3334 | RFCO | ROYAL FOODS CO INC | | | SCAC3 |
| 3335 | RFCP | RECYCLED FIBERS CORP OF NJ | | | SCAC3 |
| 3336 | RFCP | RUOFF & COMPANY INC | | | SCAC4 |
| 3337 | RFCR | REFAC INDUSTRIAL CONTRACTORS INC | | | SCAC4 |
| 3338 | RFCS | REEFER CARGO SERVICES AGENCY | | | SCAC3 |
| 3339 | RFCT | R F C TRANSPORTATION SERVICE | | | SCAC3 |
| 3340 | RFCT | REFURBISHED CONTAINER SYSTEMS | | | SCAC4 |
| 3341 | RFCT | Rail4Chem Transalpin AG | | CH | VKM |
| 3342 | RFCU | RAFFLES LEASE PTE LTD | | SGP | BIC |
| 3343 | RFCU | RAFFLES LEASE PTE LTD | | | SCAC4 |
| 3344 | RFCV | ROCKY FREIGHT & CRANE SERVICES LTD | | | SCAC4 |
| 3345 | RFCW | RFC WORLD WIDE | | | SCAC3 |
| 3346 | RFCW | RLF TRUCKING INC | | | SCAC4 |
| 3347 | RFCX | R&F Coal Co. | added 7/1980; eliminated 7/1991 | | NAKINA |
| 3348 | RFCX | Rentco Division, Fruehauf Corp. | added 4/1967; 4/1970; eliminated 7/1972 | | NAKINA |
| 3349 | RFCX | Rentco Division, Fruehauf Corp. | added 4/67; 4/70 | | NRHS |
| 3350 | RFCX | R&F Coal Co. | added 7/80; eliminated 7/91 | | NRHS |
| 3351 | RFCX | *RENTCO DIV., FRUEHAUF CORP. | | | PWRC |
| 3352 | RFCX | *R & F COAL CO. (RETIRED 06-17-91) | | | PWRC |
| 3353 | RFCX | +ROTHSAY FARMERS CO-OPERATIVE | | | PWRC |
| 3354 | RFCX | R&F Coal | | | RSRV |
| 3355 | RFCX | ROTHSAY FARMERS CO-OPERATIVE | | | SCAC4 |
| 3356 | RFCY | RUTLAND FUEL CO | | | SCAC4 |
| 3357 | RFD | Aerotransportes Rafilher, S.A. de C.V. | IATA: ZV, Callsign: Rafilher, | MEX | AVCODES |
| 3358 | RFD | Aerotransportes Rafilher | | | ICAO1 |
| 3359 | RFD | Railfreight Distribution | | GB | TRAFFIC |
| 3360 | RFDI | RELIABLE FREIGHT DISTRIBUTORS INC | | | SCAC4 |
| 3361 | RFDL | RAFTER T LIMITED | | | SCAC4 |
| 3362 | RFDN | RAEFORD TRUCKING | | | SCAC4 |
| 3363 | RFDW | RANCHO FLORES DEL OESTE - FLORAWEST | | | SCAC4 |
| 3364 | RFE | Aero Fe, S.A. | Callsign: Aerofe, | MEX | AVCODES |
| 3365 | RFE | Jet Express LLC | Callsign: Russian Express, Name changed to Jet Express Ltd. | RUS | AVCODES |
| 3366 | RFE | Jet Express Ltd. | Callsign: Russian Express, Name changed from Jet Express LLC. | RUS | AVCODES |
| 3367 | RFEI | RED FEATHER EXPRESS INC | | | SCAC4 |
| 3368 | RFEN | R F ENTERPRISES | | | SCAC4 |
| 3369 | RFEO | REYNA, FERNANDO | | | SCAC4 |
| 3370 | RFEQ | RICE FARM EQUIPMENT | | | SCAC4 |
| 3371 | RFER | REEFER XPRESS | | | SCAC4 |
| 3372 | RFES | REFRIGERATED EXPRESS SERVICE | | | SCAC3 |
| 3373 | RFES | REFRIGERATED EXPRESS SERVICE | | | SCAC4 |
| 3374 | RFET | REEFER TERMINALS INC | | | SCAC3 |
| 3375 | RFEU | NANTONG UNITED HEAVY MACHINERY CO., LTD. | | PRC | BIC |
| 3376 | RFEZ | (REAZ) RETIRED 04-06-93 ATP (ACI 2348) | | | PWRC |
| 3377 | RFF | Russian Federation Air Force | Callsign: Russian Airforce, | RUS | AVCODES |
| 3378 | RFF | Russian Federation Air Force | | | ICAO1 |
| 3379 | RFFA | ROBERTSON FAST FREIGHT | | | SCAC4 |
| 3380 | RFFI | ROSS FAST FREIGHT | | | SCAC3 |
| 3381 | RFFL | RONS FAMILY FUEL | | | SCAC4 |
| 3382 | RFFN | RIFFLINE INC | | | SCAC3 |
| 3383 | RFFN | RAINFOREST FLORA INC | | | SCAC4 |
| 3384 | RFFO | ROCCO FARM FOODS INC | | | SCAC3 |
| 3385 | RFFQ | RUFFOLO, J & SONS | | | SCAC3 |
| 3386 | RFFR | RAYMOUR & FLANIGAN FURNITURE | | | SCAC4 |
| 3387 | RFFS | RIFF SHIPPING CORP PIRAEUS GREECE | | | SCAC3 |
| 3388 | RFFSA | Rede Ferrovária Federal SA | | BR | TRAFFIC |
| 3389 | RFFT | R F FREIGHT LINES INC | | | SCAC3 |
| 3390 | RFFW | RENFREIGHT FORWARDING S A | | | SCAC3 |
| 3391 | RFGA | RFG TRANSPORTATION | | | SCAC4 |
| 3392 | RFGD | REFRIGERATED TRUCKING SERVICE, INC | | | SCAC3 |
| 3393 | RFGD | REFRIGERATED TRUCKING SERVICE INC | | | SCAC4 |
| 3394 | RFGH | RAIL FREIGHT TRANS CO | | | SCAC3 |
| 3395 | RFGH | RAIL FREIGHT TRANSPORTATION INC | | | SCAC4 |
| 3396 | RFGI | ROYAL FREIGHT INC | | | SCAC3 |
| 3397 | RFGI | RAFAGAS DEL PACIFICO | | | SCAC4 |
| 3398 | RFGM | REFRIGERADOS SDL | | | SCAC4 |
| 3399 | RFGP | R F G | | | SCAC4 |
| 3400 | RFGT | R F G TRUCKING CO | | | SCAC3 |
