| 201 | RDGT | RODGERS TRUCKING | | | SCAC4 |
| 202 | RDHD | REIDHEAD ENTERPRISES | | | SCAC3 |
| 203 | RDHD | REDHEAD EQUIPMENT LTD | | | SCAC4 |
| 204 | RDHE | REDIEKS TRANSPORTATION COMPANY | | | SCAC3 |
| 205 | RDHG | RIDING HIGH | | | SCAC3 |
| 206 | RDHI | RED HILL TRANSPORTATION | | | SCAC3 |
| 207 | RDHI | RED AND HOT TRANSPORTATION | | | SCAC4 |
| 208 | RDHK | RED HAWK WELL SERVICING INC | | | SCAC4 |
| 209 | RDHL | ROUND HILL FOODS INC | | | SCAC3 |
| 210 | RDHN | ROBERTS, D H TRANSPORTATION | | | SCAC3 |
| 211 | RDHN | RDH MINING EQUIPMENT | | | SCAC4 |
| 212 | RDHO | ROADHOG LOGISTICS LLC | | | SCAC4 |
| 213 | RDHP | REDS HORSE TRANSPORT | | | SCAC4 |
| 214 | RDHQ | RDH TRUCKING INC | | | SCAC4 |
| 215 | RDHS | RED BIRD HOT SHOT SERVICE | | | SCAC3 |
| 216 | RDHT | ROMANGO, D H TRUCKING | | | SCAC3 |
| 217 | RDHT | RED HORSE TRANSPORT INC | | | SCAC4 |
| 218 | RDHU | ELECTRONIC MATERIALS | | D | BIC |
| 219 | RDHU | RIEDEL DE HAEN AG | | | SCAC3 |
| 220 | RDHU | HONEYWELL SPECIALITY CHEMICALS SEEL | | | SCAC4 |
| 221 | RDHW | REEDEREI HERMANN WULFF | | | SCAC4 |
| 222 | RDIB | REEDER DISTRIBUTORS INC | | | SCAC4 |
| 223 | RDIC | RADSR INC | | | SCAC3 |
| 224 | RDIC | RUDI EXPRESS INC | | | SCAC4 |
| 225 | RDIE | RIDIES TRANSFER LLC | | | SCAC4 |
| 226 | RDII | ROADSPRINT INC | | | SCAC3 |
| 227 | RDIK | RODDICK TRANSPORT LIMITED | | | SCAC3 |
| 228 | RDIL | RDI LOGISTICS INC | | | SCAC4 |
| 229 | RDIN | RAPID DELIVERY OF INDIANA INC | | | SCAC3 |
| 230 | RDIO | RADIO TRANSFER INC | | | SCAC3 |
| 231 | RDIT | RODI TRUCKING SERVICE INC | | | SCAC3 |
| 232 | RDIU | RAILDECKS INC | | | SCAC4 |
| 233 | RDIX | Rapid Industrial Plastics Co. | added 1/1985; 1/1994-7/2005 | | NAKINA |
| 234 | RDIX | Rapid Industrial Plastics Co. | added 1/85; 1/94-7/2000 | | NRHS |
| 235 | RDIX | RAPID INDUSTRIAL PLASTICS COMPANY | | | PWRC |
| 236 | RDIX | Rapid Industrial Plastics | | | RSRV |
| 237 | RDIX | ENTEC POLYMERS LLC | | | SCAC4 |
| 238 | RDJ | Airone Ventures Ltd | Callsign: Redjet, Founded in 2010. Commenced operations on 10 May 2011. Ceased operations on 09 June 2012. | BDS | AVCODES |
| 239 | RDJB | RDJB TRUCKING INC | | | SCAC4 |
| 240 | RDJC | REEDER, J C INC | | | SCAC3 |
| 241 | RDJF | RUNDLETT, RF | | | SCAC4 |
| 242 | RDJH | RICHARDSON, JOSEPH H | | | SCAC3 |
| 243 | RDJO | ROBERTO DE JESUS PALACIOS CARRILLO | | | SCAC4 |
| 244 | RDJT | RDJ TRUCKING | | | SCAC3 |
| 245 | RDJT | REED, JAMES TRUCKING | | | SCAC4 |
| 246 | RDK | Irish Air Transport Ltd. | Callsign: Irish Trans, | IRL | AVCODES |
| 247 | RDK | Memorial Hermann Hospital System Life Flight | Callsign: Red Duke, | USA | AVCODES |
| 248 | RDK | Irish Air Transport | | | ICAO1 |
| 249 | RDK | Railion Denmark | | DK | VKM |
| 250 | RDKA | ROADLINK TRANSPORTATION SOLUTIONS ( | | | SCAC4 |
| 251 | RDKC | RADTKE CARTAGE INC | | | SCAC3 |
| 252 | RDKC | REDEKOP MANUFACTURING COMPANY | | | SCAC4 |
| 253 | RDKE | RADKE, JOHN | | | SCAC3 |
| 254 | RDKF | RED ROCK TRANSFER INC | | | SCAC4 |
| 255 | RDKG | REID TRUCKING, INC | | | SCAC3 |
| 256 | RDKI | R & D TRUCKING INC | | | SCAC3 |
| 257 | RDKI | RODRIGUEZ TRUCKING | | | SCAC4 |
| 258 | RDKM | REED TRUCKING | | | SCAC4 |
| 259 | RDKP | ROAD KINGS TRANSPORT LLC | | | SCAC4 |
| 260 | RDKQ | RIDDLE TRUCKING | | | SCAC4 |
| 261 | RDKR | ROAD KING EXPRESS | | | SCAC4 |
| 262 | RDKS | R & D TRUCK SERVICE | | | SCAC3 |
| 263 | RDKS | RDK TRANSPORTATION CO INC | | | SCAC4 |
| 264 | RDKT | RED K TRANSPORT INC | | | SCAC3 |
| 265 | RDKW | REDS TRUCK & WAGON | | | SCAC3 |
| 266 | RDL | Roadair Lines | Callsign: Roadair, | CDN | AVCODES |
| 267 | RDL | Heli-Team AS | Callsign: Red Lift, | N | AVCODES |
| 268 | RDL | Roadair Lines | | | ICAO1 |
| 269 | RDLA | RDL TRANSPORTATION INC | | | SCAC4 |
| 270 | RDLB | RED LABEL EXPRESS | | | SCAC3 |
| 271 | RDLB | R & D LOGISTICS | | | SCAC4 |
| 272 | RDLC | REED LAND CLEARING INC | | | SCAC3 |
| 273 | RDLC | RADIANT LOGISTICS INC | | | SCAC4 |
| 274 | RDLD | RIEDBOW DAIRY LTD | | | SCAC4 |
| 275 | RDLF | RD LEASING INC | | | SCAC4 |
| 276 | RDLG | RAND LEASING CORPORATION | | | SCAC3 |
| 277 | RDLH | R & D LEASING | | | SCAC3 |
| 278 | RDLH | RED LEAF LOGISTICS LTD | | | SCAC4 |
| 279 | RDLK | RID-LAR TRUCKING COMPANY INC | | | SCAC3 |
| 280 | RDLK | ROADLINK TRANSPORTATION SOLUTIONS ( | | | SCAC4 |
| 281 | RDLL | RANDALL TRUCKING | | | SCAC3 |
| 282 | RDLN | RED LINE INC | | | SCAC3 |
| 283 | RDLP | RANDOLPH COUNTY HAULING CO INC | | | SCAC3 |
| 284 | RDLP | RODRIGUEZ LOPEZ, LUIS LINO | | | SCAC4 |
| 285 | RDLQ | REDLINE TRANSPORT | | | SCAC4 |
| 286 | RDLR | RED LINE TRANSFER INC | | | SCAC3 |
| 287 | RDLS | RAPID DELIVERY SERVICE INC | | | SCAC4 |
| 288 | RDLT | RAINFOREST DESIGNS LIMITED | | | SCAC4 |
| 289 | RDLU | RODELLA TRASPORTI SRL | | I | BIC |
| 290 | RDLU | RODELLA TRASPORTI SRL | | | SCAC4 |
| 291 | RDLV | RELIABLE DELIVERY SERVICES INC | | | SCAC3 |
| 292 | RDM | Air Ada | Callsign: Air Ada, | RIM | AVCODES |
| 293 | RDM | Air Ada | | | ICAO1 |
| 294 | RDMA | REDMAN TRUCKING INC | | | SCAC3 |
| 295 | RDMC | R D M INC | | | SCAC3 |
| 296 | RDMD | READMOND ENTERPRISES INC | | | SCAC3 |
| 297 | RDMD | R DIAMOND GROUP OF COMPANIES LTD | | | SCAC4 |
| 298 | RDME | ROEDER IMPLEMENT INC | | | SCAC4 |
| 299 | RDMG | RICHARDSON, MALACHI & SONS TRUCKING | | | SCAC4 |
| 300 | RDMH | REDMOND, BRENT LOGISTICS LLC | | | SCAC4 |
