| 101 | RRDT | ROAD RIDER TRANSPORT LTD | | | SCAC3 |
| 102 | RRDV | R & R DELIVERY SERVICE INC | | | SCAC3 |
| 103 | RRDX | RAILROAD DEVELOPMENT CORPORATION | | | SCAC4 |
| 104 | RRDY | R & R DELIVERY SERVICE INC | | | SCAC3 |
| 105 | RRDY | R-R TRUCKING | | | SCAC4 |
| 106 | RRE | Aerotransportes Internacionales de Torreon S.A. de C.V. | Callsign: Aero Torreon, | MEX | AVCODES |
| 107 | RRE | Aerotransportes Internacionales De Torreon | | | ICAO1 |
| 108 | RREB | RAPID RESPONSE INC | | | SCAC4 |
| 109 | RREC | R & R ENTERPRISES | | | SCAC4 |
| 110 | RRED | ROADRUNNER EXPRESS DELIVERY SERVICE | | | SCAC3 |
| 111 | RREH | RANDOL INC | | | SCAC4 |
| 112 | RREI | ROAD RUNNER EXPRESS INC | | | SCAC3 |
| 113 | RREJ | R & R EXPRESS LOGISTICS INC | | | SCAC4 |
| 114 | RREK | ROAD RUNNER EXPRESS | | | SCAC4 |
| 115 | RREM | R & R EQUIPMENT LEASING LLC | | | SCAC4 |
| 116 | RREN | R & R ENTERPRISE INC | | | SCAC4 |
| 117 | RREP | R & R EXPRESS INC | | | SCAC3 |
| 118 | RREQ | ROLLIN'R ENTERPRISES INC | | | SCAC4 |
| 119 | RRER | RANSOM, RICK ENTERPRISES INC | | | SCAC4 |
| 120 | RRES | R & R EXPRESS | | | SCAC3 |
| 121 | RRET | ROAD RUNNER TRANSPORTATION INC | | | SCAC3 |
| 122 | RREV | RED RIGG EXPRESS INC | | | SCAC4 |
| 123 | RREW | RAMBLIN ROSE EXPRESS | | | SCAC4 |
| 124 | RREX | General Electric Rail Services Corp. | added 1/2000; 7/2000-7/2005 | | NAKINA |
| 125 | RREX | General Electric Railcar Services Corp. | added 10/1992; 1/1994; eliminated 1/2000 | | NAKINA |
| 126 | RREX | Itel Rail Corp. | eliminated 10/1992 | | NAKINA |
| 127 | RREX | Rex Railways, Inc. (transferred to Itel Rail Corp.) | added 10/1988 | | NAKINA |
| 128 | RREX | Rex Railways, Inc. | added 7/1978; 1/1980; eliminated 10/1988 | | NAKINA |
| 129 | RREX | Rex Railways, Inc. | added 7/78; 1/80; eliminated 10/88 | | NRHS |
| 130 | RREX | Rex Railways, Inc. (transferred to Itel Rail Corp.) | added 10/88 | | NRHS |
| 131 | RREX | Itel Rail Corp. | eliminated 10/92 | | NRHS |
| 132 | RREX | General Electric Railcar Services Corp. | added 10/92; 1/94; eliminated 1/2000 | | NRHS |
| 133 | RREX | General Electric Rail Services Corp. | added 1/2000; 7/2000 | | NRHS |
| 134 | RREX | *REX RAILWAYS INC. | | | PWRC |
| 135 | RREX | +(NATX) GENERAL ELECTRIC RAIL SERVICES CORPORATION [ITEL RAIL CORP.] | | | PWRC |
| 136 | RREX | Rex Railway | | | RSRV |
| 137 | RREX | GENERAL ELECTRIC RAILCAR SERVICES C | | | SCAC4 |
| 138 | RRF | UK Royal Positioning Flights (in military aircraft) | Callsign: Kitty, | GB | AVCODES |
| 139 | RRF | Royal Air Force | | | ICAO1 |
| 140 | RRF | Rotterdam Rail Feeding | Rotterdam Rail Feeding is a company providing shunting and hauling services to third parties. | NL | TRAFFIC |
| 141 | RRF | Rotterdam Rail Feeding | | NL | VKM |
| 142 | RRFA | REMORQUAGE R F A INC | | | SCAC4 |
| 143 | RRFB | RED RIVER FARMS | | | SCAC4 |
| 144 | RRFC | R & R FREIGHT SERVICE LLC | | | SCAC4 |
| 145 | RRFE | RANGER REFRIGERATER EXPRESS INC | | | SCAC3 |
| 146 | RRFE | RANGER REFRIGERATED EXPRESS INC | | | SCAC4 |
| 147 | RRFI | R & R FERTILIZER INC | | | SCAC3 |
| 148 | RRFI | R & R TRANSPORT | | | SCAC4 |
| 149 | RRFM | RIDDLE & RIDDLE FARMS, INC | | | SCAC3 |
| 150 | RRFN | R & R FREIGHT LINES LLC | | | SCAC4 |
| 151 | RRFP | R & R FARM TRANSPORT | | | SCAC4 |
| 152 | RRFQ | RICHMONDS REFRIGERATED TRUCKING CO | | | SCAC3 |
| 153 | RRFQ | R & R FARMS | | | SCAC4 |
| 154 | RRFS | ROAD RUNNERS FREIGHT SYSTEM INCORPO | | | SCAC3 |
| 155 | RRFT | RIPPEL, RICHARD FARMING & TRUCKING | | | SCAC4 |
| 156 | RRFW | R & R FREIGHTWAYS | | | SCAC3 |
| 157 | RRFZ | (CSXT) RETIRED 04-06-93 ATP | | | PWRC |
| 158 | RRGA | RO RO PARTNERS LTDC/O INTERORIENT N | | | SCAC4 |
| 159 | RRGB | RIGEL REEDEREI GMBH & CO KG | | | SCAC4 |
| 160 | RRGD | ROAD RANGER TRANSPORT LTD | | | SCAC4 |
| 161 | RRGE | RIGEL REEDEREI GMBH & CO KG | | | SCAC4 |
| 162 | RRGG | RIGEL REEDEREI GMBH & CO KG | | | SCAC4 |
| 163 | RRGH | RIGEL REEDEREI GMBH & CO KG | | | SCAC4 |
| 164 | RRGM | RIGEL BEREEDERUNGS GMBH & CO KG MT | | | SCAC4 |
| 165 | RRGN | RIGEL REEDEREI GMBH & CO KG | | | SCAC4 |
| 166 | RRGS | RIGEL REEDEREI GMBH & CO KG | | | SCAC4 |
| 167 | RRGT | R & R TRUCKING | | | SCAC3 |
| 168 | RRGV | RIGEL REEDEREI GMBH & CO KG | | | SCAC4 |
| 169 | RRGW | RIGEL REEDEREI GMBH & CO KG MT WOLG | | | SCAC4 |
| 170 | RRGX | Ranger Refining & Pipe Line Co. | 7/1923 | | NAKINA |
| 171 | RRGX | RANGER REFINING & PIPE LINE CO. | | | PWRC |
| 172 | RRGZ | (REAZ) RETIRED 04-06-93 ATP (ACI 2345) | | | PWRC |
| 173 | RRHC | RENTRITE HAULAGE CORP | | | SCAC3 |
| 174 | RRHH | R & R HEAVY HAUL | | | SCAC4 |
| 175 | RRHI | ROBERTS, RANDY HAULING INC | | | SCAC4 |
| 176 | RRHS | ROAD RUNNER HOTSHOT | | | SCAC3 |
| 177 | RRI | Rhenus rail St.Ingbert GmbH | | DE | VKM |
| 178 | RRIA | REGAL RIDGE | | | SCAC4 |
| 179 | RRIC | ROBERTS, ROGER A INC | | | SCAC3 |
| 180 | RRIF | RU RAN INC | | | SCAC4 |
| 181 | RRII | RED RIVER INTERMODAL INC | | | SCAC3 |
| 182 | RRII | RED RIVER INTERMODAL LLC | | | SCAC4 |
| 183 | RRIL | ROLLS RIGHT INDUSTRIES LTD | | | SCAC3 |
| 184 | RRIL | ROLLS RIGHT INDUSTRIES LTD | | | SCAC4 |
| 185 | RRIN | R & R INVESTMENT CORP | | | SCAC3 |
| 186 | RRIN | R-R INTERNATIONAL TRANSPORT LLC | | | SCAC4 |
| 187 | RRIQ | REFRIGERANT RECYCLING INC | | | SCAC4 |
| 188 | RRIU | Triton Containers | | | RSRV |
| 189 | RRIU | TRITON CONTAINER INTERNATIONAL INC | | | SCAC4 |
| 190 | RRIV | RED RIVER TRANSPORT OF COLORADO INC | | | SCAC3 |
| 191 | RRIX | Rader Railcar II, Inc. | 7/2000-7/2005 (not listed) | | NAKINA |
| 192 | RRIX | Rader Railcar II, Inc. | Jul-00 | | NRHS |
| 193 | RRIX | RADER RAILCAR II INC. | | | PWRC |
| 194 | RRIX | Rader Railcar | | | RSRV |
| 195 | RRIX | RADER RAILCAR II INC | | | SCAC4 |
| 196 | RRIY | R R I COMMODITY INC | | | SCAC4 |
| 197 | RRJD | ROBERT, ROLAND J DISTRIBUTOR INC | | | SCAC4 |
| 198 | RRJK | RRJ TRUCKING INC | | | SCAC4 |
| 199 | RRJN | RIVERA ROJAS, JUAN | | | SCAC4 |
| 200 | RRJO | RAMIRO, RIOS JASSO | | | SCAC4 |
