| 201 | RMHW | ROCKY MOUNTAIN HOTSHOT INC | | | SCAC4 |
| 202 | RMHX | REDONDO MARINE HARDWARE | | | PWRC |
| 203 | RMHX | REDONDO MARINE HARDWARE | | | SCAC4 |
| 204 | RMI | Point Airlines Limited | Callsign: Point Airline, | WAN | AVCODES |
| 205 | RMI | Point Airlines | | | ICAO1 |
| 206 | RMIA | RELIABLE EXPRESS | | | SCAC4 |
| 207 | RMIB | ROBBINS MARITIME INC | | | SCAC4 |
| 208 | RMIC | ROBINSON & MASTRANGELO INC | | | SCAC3 |
| 209 | RMID | REMOTE MEDICAL INTERNATIONAL | | | SCAC4 |
| 210 | RMIE | ROADTREK MOTORHOMES INC | | | SCAC4 |
| 211 | RMIH | R M T INC | | | SCAC3 |
| 212 | RMIH | R M T INC | | | SCAC4 |
| 213 | RMII | RAM INTERNATIONAL INC | | | SCAC4 |
| 214 | RMIK | ROCHE, MIKE INC | | | SCAC4 |
| 215 | RMIO | RMI | | | SCAC4 |
| 216 | RMIP | RAY & MASCARI INC | | | SCAC4 |
| 217 | RMIQ | ROBERTSONS MARINE INC | | | SCAC4 |
| 218 | RMIR | READING MATERIALS INC | | | SCAC4 |
| 219 | RMIS | RIMINI SHIPPING CORPORATION | | | SCAC3 |
| 220 | RMIT | RED MOUNTAIN TRUCK LINES INC | | | SCAC4 |
| 221 | RMIU | MI ENVIRONMENTAL SERVICES | | | PWRC |
| 222 | RMIU | Mi Environmental Services | | | RSRV |
| 223 | RMIX | Ready Mixed Concrete Co. | added 7/1984; 1/1994-7/2005 | | NAKINA |
| 224 | RMIX | Ready Mixed Concrete Co. | added 7/84; 1/94-7/2000 | | NRHS |
| 225 | RMIX | READY MIXED CONCRETE CO. | | | PWRC |
| 226 | RMIX | Ready Mix Concrete | | | RSRV |
| 227 | RMIX | READY MIX CONCRETE COMPANY | | | SCAC4 |
| 228 | RMIZ | R M I GLOBAL LOGISTICS INC | | | SCAC4 |
| 229 | RMJC | RUDOLPH, M J CORPORATION | | | SCAC3 |
| 230 | RMJE | RAMIREZ JIMENEZ, IGNACIO | | | SCAC4 |
| 231 | RMJG | R M J TRUCKING | | | SCAC3 |
| 232 | RMJK | R M J TRUCKING | | | SCAC3 |
| 233 | RMJP | ROMERO, JOHN P | | | SCAC3 |
| 234 | RMJR | ROBINSON, M J TRUCKING LTD | | | SCAC3 |
| 235 | RMJT | RMJ TRANS INC | | | SCAC3 |
| 236 | RMJT | ROCHER TREJO, MANUEL JESUS | | | SCAC4 |
| 237 | RMJX | Rieck-McJunkin Dairy Co. | 7/1935-4/1938 | | NAKINA |
| 238 | RMJX | Rieck-McJunkin Dairy Co. | Apr-38 | | NRHS |
| 239 | RMJX | RIECK-MCJUNKIN DAIRY CO. | | | PWRC |
| 240 | RMK | Rusavia, International Aviatransport Corporation, Joint-Stock Company | Callsign: Rusavia, | RUS | AVCODES |
| 241 | RMK | Simrik Airlines Pvt. Ltd. | Callsign: Simrik Air, | NEP | AVCODES |
| 242 | RMKA | R M T TRUCKING INC | | | SCAC4 |
| 243 | RMKB | REMARKABLE TOURS INC | | | SCAC3 |
| 244 | RMKC | RM TRUCKING CO | | | SCAC3 |
| 245 | RMKC | ROEMER TRUCKING LLC | | | SCAC4 |
| 246 | RMKE | RMK INC | | | SCAC3 |
| 247 | RMKF | REDEEMED TRUCKING INC | | | SCAC4 |
| 248 | RMKH | RICK & MARK TRUCKING | | | SCAC4 |
| 249 | RMKI | R & M TRUCKING | | | SCAC4 |
| 250 | RMKK | RAMSA TRUCKING INC | | | SCAC4 |
| 251 | RMKL | ROOD, MIKE TRANSPORT LLC | | | SCAC4 |
| 252 | RMKN | RAMOS TRUCKING | | | SCAC4 |
| 253 | RMKP | R & M TRUCKING OF | | | SCAC4 |
| 254 | RMKQ | RICKMAN TRUCKING | | | SCAC4 |
| 255 | RMKT | R M K TRUCKING INC | | | SCAC3 |
| 256 | RMKT | ROMARK TRANSPORTATION INC | | | SCAC4 |
| 257 | RMKV | R & M TRUCKING CO | | | SCAC4 |
| 258 | RMKW | RAAMSDONK TRUCKING LTD | | | SCAC4 |
| 259 | RMKY | ROCKY MOUNTAIN TRANSPORTATION INC | | | SCAC4 |
| 260 | RML | Armenian International Airways | IATA: MV, Founded in 2002. Merged with Armavia during 2005. | AM | AVCODES |
| 261 | RML | Armenian International Airways | IATA: MV | | ICAO1 |
| 262 | RML | Roma Marche Linee Spa. | | I | TRAFFIC |
| 263 | RML | RM LINES, a.s. | | CZ | VKM |
| 264 | RMLA | ROMLA COMPANY | | | SCAC4 |
| 265 | RMLB | RM LOGISTICS INC | | | SCAC4 |
| 266 | RMLC | R & M LEASING CORP | | | SCAC3 |
| 267 | RMLC | R & M LEASING CORP | | | SCAC4 |
| 268 | RMLD | RIVERA MEDINA, LUIS | | | SCAC4 |
| 269 | RMLE | RAMSEY OIL CO INC | | | SCAC4 |
| 270 | RMLF | R & M LUMBER SALES INC | | | SCAC4 |
| 271 | RMLG | ROAD MARK LOGISTICS INC | | | SCAC4 |
| 272 | RMLH | REIMER MANAGEMENT LTD | | | SCAC4 |
| 273 | RMLI | R & M LUMBER SALES INC | | | SCAC3 |
| 274 | RMLI | RML TRANSPORT INC | | | SCAC4 |
| 275 | RMLJ | ROCKY MOUNTAIN LOGISTICS INC | | | SCAC4 |
| 276 | RMLK | RICHGELS MILK SERVICE INC | | | SCAC3 |
| 277 | RMLL | R M LOGISTICS INC | | | SCAC4 |
| 278 | RMLN | R & M LOGISTICS INC | | | SCAC4 |
| 279 | RMLO | REMLO LOGISTICS, INC | | | SCAC3 |
| 280 | RMLO | ROSENBAUER MINNESOTA LLC | | | SCAC4 |
| 281 | RMLP | RAMOS, LAZARO | | | SCAC4 |
| 282 | RMLR | RAM LOGISTICS LLC | | | SCAC4 |
| 283 | RMLS | R & M LIVESTOCK & TRUCKING | | | SCAC3 |
| 284 | RMLS | RAM LOGISTICS LLC | | | SCAC4 |
| 285 | RMLT | RAMLER TRUCKING | | | SCAC3 |
| 286 | RMLT | RAMLER TRUCKING INC | | | SCAC4 |
| 287 | RMLU | ROYAL MAIL LINES LIMITED | | | PWRC |
| 288 | RMLU | Royal Mail Lines Limited | | | RSRV |
| 289 | RMLU | HAMBURG SUED | | | SCAC4 |
| 290 | RMLV | ROYAL MK LOGISTICS INC | | | SCAC4 |
| 291 | RMLX | PMG LEASING, LLC | | | PWRC |
| 292 | RMLX | RMG LEASING LLC | | | SCAC4 |
| 293 | RMLY | RAY-MONT LOGISTICS INC | | | SCAC4 |
| 294 | RMM | AiRom 2000 S.R.L. | Callsign: Airom Flyer, Ceased operations. | RO | AVCODES |
| 295 | RMMB | R & M MOBILE HOME MOVERS | | | SCAC3 |
| 296 | RMMC | RADIGAN & MCGILLY MOVING & STORAGE | | | SCAC3 |
| 297 | RMMC | ROMERO, M & M TRANSPORT LLC | | | SCAC4 |
| 298 | RMMD | R & M MEYER | | | SCAC4 |
| 299 | RMME | ROCKY MOUNTAIN MILLWRIGHTS & MACHIN | | | SCAC3 |
| 300 | RMME | RAMIREZ MARTINEZ, ENRIQUE | | | SCAC4 |
