| 3101 | RFGT | R F G TRANSPORT INC | SCAC4 | ||
| 3102 | RFHS | REINDEER FREIGHT SYSTEM | SCAC3 | ||
| 3103 | RFHS | REFRIGERADOS HERMANOS VELASCO ALCAR | SCAC4 | ||
| 3104 | RFI | National Air Traffic Services | ICAO1 | ||
| 3105 | RFI | Rete Ferroviaria Italiana | The owner of the FS railway network. | I | TRAFFIC |
| 3106 | RFI | Rete Ferroviaria Italiana | IT | VKM | |
| 3107 | RFII | RAJ FREIGHTLINES INC | SCAC4 | ||
| 3108 | RFIP | RAFFIELD FISHERIES INC | SCAC4 | ||
| 3109 | RFIQ | RITTER FEEDS INC | SCAC4 | ||
| 3110 | RFIS | RELIABLE FREIGHT SYSTEMS, INC | SCAC3 | ||
| 3111 | RFIS | RELIABLE FREIGHT SYSTEMS INC | SCAC4 | ||
| 3112 | RFJZ | (REAZ) RETIRED 06-17-91 ATP (2465) | PWRC | ||
| 3113 | RFKB | RFK TRANSPORTATION BROKERAGE | SCAC4 | ||
| 3114 | RFKC | RUTHERFORD TRUCKING COMPANY INC | SCAC3 | ||
| 3115 | RFKT | R F K TRANSPORTATION SERVICES INC | SCAC3 | ||
| 3116 | RFL | Interfly | ICAO1 | ||
| 3117 | RFLB | ROBINSON, C H WORLDWIDE (FLATBED DI | SCAC4 | ||
| 3118 | RFLC | RELIABLE FREIGHT LINES INC | SCAC3 | ||
| 3119 | RFLC | REPUBLIC FREIGHT LLC | SCAC4 | ||
| 3120 | RFLD | ROYAL FOODS LTD | SCAC4 | ||
| 3121 | RFLE | ROBERTO FLORES | SCAC4 | ||
| 3122 | RFLE | Railflex | D | TRAFFIC | |
| 3123 | RFLG | RED FISH LOGISTICS INC | SCAC4 | ||
| 3124 | RFLH | RICHMOND FREIGHT LLC | SCAC4 | ||
| 3125 | RFLI | ROSE FREIGHT LINES INC | SCAC3 | ||
| 3126 | RFLI | RYAN INC | SCAC4 | ||
| 3127 | RFLJ | ROYAL FENCE LIMITED | SCAC4 | ||
| 3128 | RFLL | RED FUNNEL LINE LTD. | SCAC3 | ||
| 3129 | RFLL | RIO FUEL & SUPPLY | SCAC4 | ||
| 3130 | RFLM | RANDALL FARMS LLC | SCAC4 | ||
| 3131 | RFLN | REBEL FREIGHT LINES INC | SCAC3 | ||
| 3132 | RFLN | RIGAL FUELS LLC | SCAC4 | ||
| 3133 | RFLO | RANCHO DE LAS FLORES | SCAC4 | ||
| 3134 | RFLP | ROYAL FREIGHT L P | SCAC4 | ||
| 3135 | RFLQ | R F LOGISTICS LLC | SCAC4 | ||
| 3136 | RFLS | ROBINSON FREIGHT LINES | SCAC3 | ||
| 3137 | RFLS | RAPID FLORAL SYSTEMS (RFS) INC | SCAC4 | ||
| 3138 | RFLU | REFRIGERATED FREIGHT LINES LTD | SCAC3 | ||
| 3139 | RFLU | R M I T | SCAC4 | ||
| 3140 | RFLV | ROMEROS FARM LLC | SCAC4 | ||
| 3141 | RFLY | REPUBLIC FREIGHT LLC | SCAC4 | ||
| 3142 | RFMC | R F & MC TRUCK TRANSFER CO INC | SCAC4 | ||
| 3143 | RFMG | ROCKFARM LOGISTICS LLC | SCAC4 | ||
| 3144 | RFMI | RANKIN FARMS INC | SCAC4 | ||
| 3145 | RFMK | RIFICI, MIGUEL TRUCK-N | SCAC4 | ||
| 3146 | RFMM | RYAN FLEET MANAGEMENT | SCAC4 | ||
| 3147 | RFMN | REFACCIONES Y MAQUINARIA DEL NOROES | SCAC4 | ||
| 3148 | RFMO | R & F MOTORS INC | SCAC4 | ||
| 3149 | RFMS | READS MOV | SCAC4 | ||
| 3150 | RFMV | ROCKY FORD MOVING VANS INC | SCAC3 | ||
| 3151 | RFMX | Caldwell-Baker Co. | added 7/1985; eliminated 10/1990; 1/1994-7/2005 (not listed) | NAKINA | |
| 3152 | RFMX | Robert F. Miller | added 1/1974; 1/1975-1/1980; eliminated 7/1985 | NAKINA | |
| 3153 | RFMX | Robert F. Miller | added 1/74; 1/75-1/80 | NRHS | |
| 3154 | RFMX | Caldwell-Baker Co. | eliminated 10/90; 1/94-7/2000 | NRHS | |
| 3155 | RFMX | CALDWELL-BAKER COMPANY {ROBERT F. MILLER] | PWRC | ||
| 3156 | RFMX | Robert F. Miller (Coldwell-Baker) | RSRV | ||
| 3157 | RFMX | CALDWELL-BAKER COMPANY | SCAC4 | ||
| 3158 | RFNI | REACH FOURTY NINE (49) INC | SCAC3 | ||
| 3159 | RFNR | REFINERS TRANSPORT, INC | SCAC3 | ||
| 3160 | RFO | RAIL FORCE | RO | VKM | |
| 3161 | RFOC | RED FLAME OIL CO | SCAC4 | ||
| 3162 | RFOFS | Rail Force One Fleet Services | NL | TRAFFIC | |
| 3163 | RFOH | ROSE FUEL OIL & HEATING COMPANY INC | SCAC4 | ||
| 3164 | RFOJ | REIGEL FUEL OIL LLC | SCAC4 | ||
| 3165 | RFOL | RAUSCH FUEL OIL COMPANY | SCAC4 | ||
| 3166 | RFOM | REIF OIL TRANSPORT | SCAC4 | ||
| 3167 | RFOP | ROBERTSON FUEL OIL INC | SCAC4 | ||
| 3168 | RFOR | RANSFORD, KEN HOLDINGS LTD | SCAC4 | ||
| 3169 | RFOT | RAPID FREIGHT OF TEXAS INC | SCAC3 | ||
| 3170 | RFOW | REMCO FORWARDING LTD | SCAC4 | ||
| 3171 | RFOY | REIT FUEL OIL COMPANY | SCAC4 | ||
| 3172 | RFP | CSX Transportation, Inc. | 1/1994-7/2005 | NAKINA | |
| 3173 | RFP | Richmond, Fredricksburg & Potomac Ry. Co. | added 1/1992; eliminated 7/1992 | NAKINA | |
| 3174 | RFP | Richmond, Fredricksburg & Potomac R.R. Co. | 4/1938-1/1980; eliminated 1/1992 | NAKINA | |
| 3175 | RFP | Richmond, Fredricksburg & Potomac R.R. Co. | 4/38-1/80; eliminated 1/92 | NRHS | |
| 3176 | RFP | Richmond, Fredricksburg & Potomac Ry. Co. | added 1/92; eliminated 7/92 | NRHS | |
| 3177 | RFP | CSX Transportation, Inc. | 1/94-7/2000 | NRHS | |
| 3178 | RFP | CSX TRANSPORTATION, INC. [RICHMOND, FREDERICKSBURG & POTOMAC RR] | PWRC | ||
| 3179 | RFP | Richmond, Fredericksburg and Potomac Railroad (CSX Transportation) | RSRV | ||
| 3180 | RFP | Richmond, Fredricksburg & Potomac Railroad | USA | TRAFFIC | |
| 3181 | RFPF | ROCKY FORD PET FOOD INC | SCAC3 | ||
| 3182 | RFPM | REFINED PETROLEUM CO | SCAC3 | ||
| 3183 | RFPO | ROSEBURG FOREST PRODUCTS CO | SCAC4 | ||
| 3184 | RFPU | CSX TRANSPORTATION, INC. | PWRC | ||
| 3185 | RFPU | Richmond, Fredericksburg and Potomac Railroad (CSX Transportation) | RSRV | ||
| 3186 | RFPX | Merchants Despatch Transportation Corp. | 7/1937-4/1947 | NAKINA | |
| 3187 | RFPX | Republic Food Products Co. (Merchants Despatch, Inc.) | 7/1935 | NAKINA | |
| 3188 | RFPX | Republic Food Products Co. | 7/1932 | NAKINA | |
| 3189 | RFPX | Republic Food Products Co. (Merchants Despatch Transportation Corp.) | Apr-38 | NRHS | |
| 3190 | RFPX | REPUBLIC FOOD PRODUCTS CO. (MERCHANTS DESPATCH TRANSPORTATION CORP.) | PWRC | ||
| 3191 | RFPZ | CSX TRANSPORTATION, INC. | PWRC | ||
| 3192 | RFPZ | Richmond, Fredericksburg and Potomac Railroad (CSX Transportation) | RSRV | ||
| 3193 | RFPZ | CSX TRANSPORTATION | SCAC4 | ||
| 3194 | RFR | Royal Air Force | IATA: RR | ICAO1 | |
| 3195 | RFRC | R FREIGHT CARRIERS INC | SCAC3 | ||
| 3196 | RFRC | ROSCO FREIGHT SERVICE INC | SCAC4 | ||
| 3197 | RFRD | REFORD, ROBERT INC | SCAC3 | ||
| 3198 | RFRI | ROM-FREIGHT INC | SCAC4 | ||
| 3199 | RFRN | ROUSH FENWAY RACING LLC | SCAC4 | ||
| 3200 | RFRP | ROOM FOR RENT EQUIPMENT LEASING INC | SCAC4 |