| 7101 | RRBB | R & R BIG BUS | SCAC4 | ||
| 7102 | RRBE | REEDEREI BLUE STAR GMBH | SCAC4 | ||
| 7103 | RRBG | R & R BROKERAGE | SCAC3 | ||
| 7104 | RRBH | ROSEAU RIVER BUFFALO RANCH | SCAC4 | ||
| 7105 | RRBK | R & R BULK TRANSPORT INC | SCAC4 | ||
| 7106 | RRBL | RED RIVER BARGE LINE, INC | SCAC3 | ||
| 7107 | RRBN | RAPID ROBIN | SCAC3 | ||
| 7108 | RRBS | ROADRUNNER BUS LINES | SCAC3 | ||
| 7109 | RRBT | ROARK, ROBERT TRUCKING CO | SCAC3 | ||
| 7110 | RRBT | ROARK, ROBERT TRUCKING CO | SCAC4 | ||
| 7111 | RRBX | Rampart Range Corp. | added 4/1994; eliminated 7/1999; added 10/1999; 7/2000-7/2005; eliminated 1/2007 | NAKINA | |
| 7112 | RRBX | Rampart Range Corp. | added 4/94; eliminated 7/99; added 10/99; 7/2000 | NRHS | |
| 7113 | RRBX | RAMPART RANGE CORPORATION | PWRC | ||
| 7114 | RRBX | Rampart Range Corporation | RSRV | ||
| 7115 | RRBX | RAMPART RANGE CORPORATION | SCAC4 | ||
| 7116 | RRC | Aero Roca | ICAO1 | ||
| 7117 | RRC | REDMONT RAILWAY COMPANY | PWRC | ||
| 7118 | RRC | Respondek Railroad Corporation | RSRV | ||
| 7119 | RRC | REDMONT RAILWAY COMPANY INC | SCAC4 | ||
| 7120 | RRC | Respondek Railroad Corporation | USA | TRAFFIC | |
| 7121 | RRCB | RAWHIDE RODEO COMPANY | SCAC4 | ||
| 7122 | RRCE | RACE RECYCLING AND COMPACTING EQUIP | SCAC4 | ||
| 7123 | RRCF | ROUGH RIDER CRANE SERVICE | SCAC4 | ||
| 7124 | RRCG | R AND R CARTAGE INC | SCAC3 | ||
| 7125 | RRCH | R & R CHARTER | SCAC3 | ||
| 7126 | RRCH | R & R OIL INC | SCAC4 | ||
| 7127 | RRCI | Redmont Ry. Co., Inc. | 7/2000-7/2005 | NAKINA | |
| 7128 | RRCI | Redmont Ry. Co., Inc. | Jul-00 | NRHS | |
| 7129 | RRCI | REDMONT RAILWAY COMPANY | PWRC | ||
| 7130 | RRCI | Redmont Railway | RSRV | ||
| 7131 | RRCI | R & R CONTRACTING INC | SCAC4 | ||
| 7132 | RRCK | RED ROCK ENTERPRISES LLC | SCAC4 | ||
| 7133 | RRCL | R & R EXPEDITERS INC | SCAC3 | ||
| 7134 | RRCM | RIVER REGION COOPERATIVE | SCAC4 | ||
| 7135 | RRCN | R & R CONSTRUCTION CO INC | SCAC4 | ||
| 7136 | RRCO | Rochelle R.R. Co. | 7/2000-7/2005 | NAKINA | |
| 7137 | RRCO | Rochelle R.R. Co. | Jul-00 | NRHS | |
| 7138 | RRCO | ROCHELLE RAILROAD COMPANY | PWRC | ||
| 7139 | RRCO | Rochelle Railroad | RSRV | ||
| 7140 | RRCO | ROCHELLE RAILROAD CO | SCAC4 | ||
| 7141 | RRCP | REMI MARITIME CORPORATION | SCAC4 | ||
| 7142 | RRCQ | RADAR RUNNERS CORP | SCAC4 | ||
| 7143 | RRCS | RELIABLE RUNNERS COURIER SERVICE IN | SCAC4 | ||
| 7144 | RRCT | RR CONSULTING | SCAC4 | ||
| 7145 | RRCU | RAUTARUUKKI OY | SCAC3 | ||
| 7146 | RRCU | REFTRADE RENTAL B V | SCAC4 | ||
| 7147 | RRCV | RIVER CITY VAN LINE INC | SCAC3 | ||
| 7148 | RRCX | Radar Railcar, Inc. | 1/1994-7/2005 (not listed) | NAKINA | |
| 7149 | RRCX | Regent Refining (Canada) Ltd. (marks changed from TLCX) | added 4/1956; 10/1957; eliminated 10/1958 | NAKINA | |
| 7150 | RRCX | Regent Refining (Canada) Ltd. | 10/57; eliminated 10/58 | NRHS | |
| 7151 | RRCX | Radar Railcar, Inc. | 1/94-7/2000 | NRHS | |
| 7152 | RRCX | *REGENT REFINING (CANADA) LTD. | PWRC | ||
| 7153 | RRCX | +RADER RAILCAR, INC. | PWRC | ||
| 7154 | RRCX | Radar Railcar | RSRV | ||
| 7155 | RRCX | RADAR RAILCAR, INC. | SCAC4 | ||
| 7156 | RRCY | RAPID RECOVERY TOWING LTD | SCAC4 | ||
| 7157 | RRD | ADOLPH COORS COMPANY | PWRC | ||
| 7158 | RRDC | RAILINC | SCAC3 | ||
| 7159 | RRDC | RAILINC | SCAC4 | ||
| 7160 | RRDD | R & R DISTRIBUTORS INC | SCAC4 | ||
| 7161 | RRDE | ROADRUNNER DELIVERY SERVICE | SCAC3 | ||
| 7162 | RRDF | REED, R D HEAVY TRANSPORT LLC | SCAC4 | ||
| 7163 | RRDI | ROAD RUNNER DELIVERY INC | SCAC3 | ||
| 7164 | RRDL | ROAD RUNNER DELIVERY SERVICE INC | SCAC3 | ||
| 7165 | RRDM | RICHCO ROTTERDAM B V | SCAC3 | ||
| 7166 | RRDN | R & R DISTRIBUTING CO INC | SCAC4 | ||
| 7167 | RRDP | ROMAN ROAD EXPRESS | SCAC4 | ||
| 7168 | RRDR | ROUGHRIDER TRANSPORT | SCAC3 | ||
| 7169 | RRDS | RAPID RESPONSE DELIVERY INC | SCAC4 | ||
| 7170 | RRDT | ROAD RIDER TRANSPORT LTD | SCAC3 | ||
| 7171 | RRDV | R & R DELIVERY SERVICE INC | SCAC3 | ||
| 7172 | RRDX | RAILROAD DEVELOPMENT CORPORATION | SCAC4 | ||
| 7173 | RRDY | R & R DELIVERY SERVICE INC | SCAC3 | ||
| 7174 | RRDY | R-R TRUCKING | SCAC4 | ||
| 7175 | RRE | Aerotransportes Internacionales De Torreon | ICAO1 | ||
| 7176 | RREB | RAPID RESPONSE INC | SCAC4 | ||
| 7177 | RREC | R & R ENTERPRISES | SCAC4 | ||
| 7178 | RRED | ROADRUNNER EXPRESS DELIVERY SERVICE | SCAC3 | ||
| 7179 | RREH | RANDOL INC | SCAC4 | ||
| 7180 | RREI | ROAD RUNNER EXPRESS INC | SCAC3 | ||
| 7181 | RREJ | R & R EXPRESS LOGISTICS INC | SCAC4 | ||
| 7182 | RREK | ROAD RUNNER EXPRESS | SCAC4 | ||
| 7183 | RREM | R & R EQUIPMENT LEASING LLC | SCAC4 | ||
| 7184 | RREN | R & R ENTERPRISE INC | SCAC4 | ||
| 7185 | RREP | R & R EXPRESS INC | SCAC3 | ||
| 7186 | RREQ | ROLLIN'R ENTERPRISES INC | SCAC4 | ||
| 7187 | RRER | RANSOM, RICK ENTERPRISES INC | SCAC4 | ||
| 7188 | RRES | R & R EXPRESS | SCAC3 | ||
| 7189 | RRET | ROAD RUNNER TRANSPORTATION INC | SCAC3 | ||
| 7190 | RREV | RED RIGG EXPRESS INC | SCAC4 | ||
| 7191 | RREW | RAMBLIN ROSE EXPRESS | SCAC4 | ||
| 7192 | RREX | General Electric Rail Services Corp. | added 1/2000; 7/2000-7/2005 | NAKINA | |
| 7193 | RREX | General Electric Railcar Services Corp. | added 10/1992; 1/1994; eliminated 1/2000 | NAKINA | |
| 7194 | RREX | Itel Rail Corp. | eliminated 10/1992 | NAKINA | |
| 7195 | RREX | Rex Railways, Inc. (transferred to Itel Rail Corp.) | added 10/1988 | NAKINA | |
| 7196 | RREX | Rex Railways, Inc. | added 7/1978; 1/1980; eliminated 10/1988 | NAKINA | |
| 7197 | RREX | Rex Railways, Inc. | added 7/78; 1/80; eliminated 10/88 | NRHS | |
| 7198 | RREX | Rex Railways, Inc. (transferred to Itel Rail Corp.) | added 10/88 | NRHS | |
| 7199 | RREX | Itel Rail Corp. | eliminated 10/92 | NRHS | |
| 7200 | RREX | General Electric Railcar Services Corp. | added 10/92; 1/94; eliminated 1/2000 | NRHS |