| 201 | RRJT | RUBEL, R J TRUCKING | | | SCAC3 |
| 202 | RRK | Asia Continental Avialines | Callsign: Rufa, | KZ | AVCODES |
| 203 | RRKA | RACER TRUCKING | | | SCAC4 |
| 204 | RRKC | RUSHTRUCKING INC | | | SCAC3 |
| 205 | RRKC | RANGE RIDER TRUCK CANOPIES | | | SCAC4 |
| 206 | RRKD | ROUND ROBIN TRUCKING INC | | | SCAC4 |
| 207 | RRKG | RHODES TRUCKING INC | | | SCAC3 |
| 208 | RRKI | ROGERS & ROGERS TRUCKING CO | | | SCAC4 |
| 209 | RRKL | RUSHON, R TRUCKING LP | | | SCAC4 |
| 210 | RRKN | R & R TRUCKING | | | SCAC3 |
| 211 | RRKN | R & R TRUCKING INC | | | SCAC4 |
| 212 | RRKQ | RODERICK, F J & SON INC | | | SCAC3 |
| 213 | RRKQ | RANGERACK INC | | | SCAC4 |
| 214 | RRKT | RUSSELL, R K TRANSPORTATION LTD | | | SCAC4 |
| 215 | RRKW | R & R TRUCKING CORPORATION | | | SCAC3 |
| 216 | RRKW | R RELIABLE TRUCKING LLC | | | SCAC4 |
| 217 | RRKY | R & R TRUCKING COMPANY | | | SCAC3 |
| 218 | RRL | Rolls Royce Ltd. (Military Aviation) | Callsign: Merlin, | GB | AVCODES |
| 219 | RRL | Rolls-Royce Limited | | | ICAO1 |
| 220 | RRL | Rhenus Rail Logistics GmbH | Duisburg | D | privat-bahn.de |
| 221 | RRL | Rail Release GmbH | | NL | VKM |
| 222 | RRLA | RADIUS RAIL LOGISTICS LLC | | | SCAC4 |
| 223 | RRLC | ROAD AND RAIL TRANSPORT INCORPORATE | | | SCAC4 |
| 224 | RRLD | RITARA LIMITED | | | SCAC3 |
| 225 | RRLE | ROADRUNNER LEDFOOT EXPRESS INC | | | SCAC3 |
| 226 | RRLF | RITTER, R L FUEL INC | | | SCAC4 |
| 227 | RRLG | ROADRUNNER LEASING INC | | | SCAC3 |
| 228 | RRLH | ROLLING RIVER LIVE HAULING INC | | | SCAC4 |
| 229 | RRLI | R & R LIMOUSINE INC | | | SCAC3 |
| 230 | RRLO | R & R LOGGING INC | | | SCAC3 |
| 231 | RRLQ | ROYAL ROSE LOGISTICS INC | | | SCAC4 |
| 232 | RRLR | RAMSEY, RAYMOND LEROY | | | SCAC3 |
| 233 | RRLR | R & R LOGISTICS INC | | | SCAC4 |
| 234 | RRLR | Regiorail SAS | | FR | VKM |
| 235 | RRLS | ROSSITER RELOCATION SERVICES INC | | | SCAC4 |
| 236 | RRLT | ROMRELL TRUCKING INC | | | SCAC3 |
| 237 | RRLT | ROAD RUNNER LOGISTICS INC | | | SCAC4 |
| 238 | RRLU | RABANCO COMPANIES | | | SCAC4 |
| 239 | RRLV | RIVER RUN LOGISITICS | | | SCAC4 |
| 240 | RRLX | Rail Logistics, LC | added 10/2004; 7/2005 | | NAKINA |
| 241 | RRLX | *RAILROAD RESOURCES INC. | | | PWRC |
| 242 | RRLX | +RAIL LOGISTICS, LC | | | PWRC |
| 243 | RRLX | Railroad Resources | | | RSRV |
| 244 | RRLX | RAIL LOGISTICS LC | | | SCAC4 |
| 245 | RRLY | ROBERTSON RACING LLC | | | SCAC4 |
| 246 | RRM | Acvila Air | Callsign: Air Romania, Ceased operations on 30 April 2006. Designator WZ recalled by IATA | RO | AVCODES |
| 247 | RRM | Acvila Air-Romanian Carrier | | | ICAO1 |
| 248 | RRMC | R & R MOTOR COACH INC | | | SCAC3 |
| 249 | RRMC | ROMAN, R TRANSPORT INC | | | SCAC4 |
| 250 | RRMH | R & R MOBILE HOME TRANSPORT | | | SCAC3 |
| 251 | RRMI | RROYCE MOVERS INC | | | SCAC3 |
| 252 | RRMQ | RRM TRANSPORTATION INCORPORATED | | | SCAC4 |
| 253 | RRMR | RODRIMAR INTERNATIONAL FREIGHT INC | | | SCAC4 |
| 254 | RRMS | ROADRUNNER MOVING & STORAGE | | | SCAC4 |
| 255 | RRMT | ROAD RUNNER MOBILE HOME TRANSPORT | | | SCAC3 |
| 256 | RRMT | RYDING REGENCY MEAT PAKCERS LTD | | | SCAC4 |
| 257 | RRMU | REMAIN GMBH CONTAINER DEPOT AND REPAIR | | D | BIC |
| 258 | RRMU | REMAIN GMBH CONTAINER-DEPOT AND REP | | | SCAC4 |
| 259 | RRMX | RRM Properties Ltd., a California Limited Partnership | 7/2005 (not listed) | | NAKINA |
| 260 | RRMX | RRM PROPERTIES LTD., CALIFORNIA LP | | | PWRC |
| 261 | RRMX | RRM Properties | | | RSRV |
| 262 | RRMX | RRM PROPERTIES LTD A CALIFORNIA LIM | | | SCAC4 |
| 263 | RRN | Ararat International Airline LLC | Callsign: Ararat Airline, Founded in 2010. Ceased operations during 2013. | AM | AVCODES |
| 264 | RRNB | ROADRUNNER BUS LINES INC | | | SCAC3 |
| 265 | RRND | ROAD RUNNER DRIVEAWAY LLC | | | SCAC4 |
| 266 | RRNE | RIDGE RUNNER EXPRESS | | | SCAC3 |
| 267 | RRNI | RANEY & RANEY INC | | | SCAC3 |
| 268 | RRNL | RNL RENTAL NETWORK LTD | | | SCAC4 |
| 269 | RRNN | ROAD RUNNER TRANSPORTATION INC | | | SCAC4 |
| 270 | RRNP | ROAD RUNNER TRANSPORTATION LLC | | | SCAC4 |
| 271 | RRNT | ROADRUNNER TRANSPORTATION INC | | | SCAC3 |
| 272 | RRNT | R & R TRANSPORTATIONINC | | | SCAC4 |
| 273 | RRO | Aerocredo, Closed Corporation | | RUS | AVCODES |
| 274 | RROA | RIGEL REEDEREI GMBH & CO KG | | | SCAC4 |
| 275 | RROB | RICE, ROBERT | | | SCAC4 |
| 276 | RROD | RAMROD MOVING AND STORAGE | | | SCAC3 |
| 277 | RROG | RODRIGUEZ, GILBERTO ROSA TRANSPORT | | | SCAC3 |
| 278 | RROK | R R O TRUCKING CO | | | SCAC4 |
| 279 | RROL | RAILROLL INC | | | SCAC3 |
| 280 | RROX | RROX, LTD. | | | PWRC |
| 281 | RROX | RROX LTD | | | SCAC4 |
| 282 | RROY | RENNER, ROY TRUCKING | | | SCAC3 |
| 283 | RROY | Rolls Royce | | | TRAFFIC |
| 284 | RRP | *RAILROAD PASSENGER CAR SERVICE | | | PWRC |
| 285 | RRP | *RETIRED 05-15-92 ATP (0938) | | | PWRC |
| 286 | RRP | Railroad Passenger Cars Service | | USA | TRAFFIC |
| 287 | RRPC | R & R TRANSPORT INC | | | SCAC3 |
| 288 | RRPD | RANSOM, ROBERT PRODUCE | | | SCAC3 |
| 289 | RRPD | R & R PICK-UP & | | | SCAC4 |
| 290 | RRPG | R & R PACKAGING INC | | | SCAC4 |
| 291 | RRPI | R & R PHILLIPS TRUCKING | | | SCAC3 |
| 292 | RRPI | ROY, RICK PRODUCTS INC | | | SCAC4 |
| 293 | RRPJ | R & R PLASTIC INJECTION CONSULTANTS | | | SCAC4 |
| 294 | RRPL | R & R PLUS INC | | | SCAC4 |
| 295 | RRPN | R & R TRANSPORTATION INC | | | SCAC3 |
| 296 | RRPO | R & R PALLET OF GARDEN CITY INC | | | SCAC4 |
| 297 | RRPQ | R & R PRODUCE INC | | | SCAC4 |
| 298 | RRPR | RAYMOND ENTERPRISES SA | | | SCAC4 |
| 299 | RRPT | R & R TRANSPORTATION | | | SCAC3 |
| 300 | RRPT | R & R TRANSPORTATION INC | | | SCAC4 |
