| 101 | RSCX | The Ralston Steel Car Co. | 7/1923 | | NAKINA |
| 102 | RSCX | Republic Steel Corp. | 4/38-4/70; eliminated 1/72 | | NRHS |
| 103 | RSCX | *RALSTON STEEL CAR CO. | | | PWRC |
| 104 | RSCX | *REPUBLIC STEEL CO. | | | PWRC |
| 105 | RSCX | *RESCAR | | | PWRC |
| 106 | RSCX | REPUBLIC STEEL CORP | | | SCAC3 |
| 107 | RSCX | Republic Steel Corporation | | USA | TRAFFIC |
| 108 | RSCY | ROSE CITY TRANSPORTATION INC | | | SCAC4 |
| 109 | RSCZ | *(CSXT) RETIRED 04-06-93 ATP (ACI 2389) | | | PWRC |
| 110 | RSCZ | *RYERSON STEEL CO. | | | PWRC |
| 111 | RSD | Airside Aviation Limited | Callsign: Airside, | GB | AVCODES |
| 112 | RSD | RSD-Sicherheitsdienst GmbH& Co. | | DE | VKM |
| 113 | RSDB | RSD CONTRACTING LTD | | | SCAC4 |
| 114 | RSDC | ROSSI, D CONSTRUCTION CO INC | | | SCAC3 |
| 115 | RSDC | ROSEDALE MECHANICAL LTD | | | SCAC4 |
| 116 | RSDD | ROSS DELIVERY SERVICE INC | | | SCAC4 |
| 117 | RSDE | R S D ENTERPRISES INC | | | SCAC3 |
| 118 | RSDE | ROSE, DENIS JR TRUCKING INC | | | SCAC4 |
| 119 | RSDER | RAILSIDER LOGISTICA FERROVIARIA, S.A. | | ES | VKM |
| 120 | RSDF | REISDORF, DAVE INC | | | SCAC4 |
| 121 | RSDH | ROSEDALE HUTTERIAN BRETHERN INC | | | SCAC4 |
| 122 | RSDI | R S D SERVICES INC | | | SCAC3 |
| 123 | RSDL | ROSEDALE TRANSPORT INC | | | SCAC4 |
| 124 | RSDM | RSDS | | | SCAC3 |
| 125 | RSDM | RSDS | | | SCAC4 |
| 126 | RSDN | R & S DISTRIBUTION | | | SCAC4 |
| 127 | RSDO | ROSADO, LOUIS TRUCKING INC | | | SCAC3 |
| 128 | RSDP | R A S DISTRIBUTION CORPORATION | | | SCAC4 |
| 129 | RSDQ | ROSE, DONALD R | | | SCAC4 |
| 130 | RSDR | ROSS, DENNIS R TRUCKING | | | SCAC3 |
| 131 | RSDR | RIO TRANSPORTES EXPRESS SA DE CV | | | SCAC4 |
| 132 | RSDS | RELIANCE SPECIAL DELIVERY SERVICE, INC | | | SCAC3 |
| 133 | RSDT | R S D TRANSPORTATION INC | | | SCAC3 |
| 134 | RSDW | RMMJ SERVICE & DELIVERY LLC | | | SCAC4 |
| 135 | RSDY | R & S DISTRIBUTIONS SYSTEMS | | | SCAC3 |
| 136 | RSE | SNAS Aviation | Callsign: Red Sea, IATA Prefix: 952, Accounting & Prefix Codes recalled by IATA | SA | AVCODES |
| 137 | RSE | Irose Limited | Callsign: Irose, | BS | AVCODES |
| 138 | RSE | SNAS Aviation | | | ICAO1 |
| 139 | RSE | Rhein-Sieg-Eisenbahn-Betriebsgesellschaft mbH | Bonn | D | privat-bahn.de |
| 140 | RSE | Rhein-Sieg-Eisenbahn | | D | TRAFFIC |
| 141 | RSE | Rhein-Sieg-Eisenbahn | | DE | VKM |
| 142 | RSEA | ROAD & SEA TRANSPORT INC | | | SCAC3 |
| 143 | RSEC | RIOSECO, ARTURO | | | SCAC3 |
| 144 | RSEC | ROSE CONTAINERLINE INC | | | SCAC4 |
| 145 | RSEE | RUSSELL ENTERPRISES INC | | | SCAC3 |
| 146 | RSEF | RAYS SEAFOOD MARKET INC | | | SCAC4 |
| 147 | RSEG | RISING STAR ENTERPRISES LTD | | | SCAC4 |
| 148 | RSEH | REHOBOT SERVICES | | | SCAC4 |
| 149 | RSEI | ROSE CARTAGE SERVICE INC | | | SCAC3 |
| 150 | RSEI | ROSE CARTAGE SERVICE INC | | | SCAC4 |
| 151 | RSEJ | ROSE, J H TRUCK LINE INC | | | SCAC3 |
| 152 | RSEJ | Railservice | | DK | VKM |
| 153 | RSEK | ROSE TRUCKING | | | SCAC3 |
| 154 | RSEL | TNT RED STAR EXPRESS, INC | | | SCAC3 |
| 155 | RSEL | RED SEA EXPRESS LLC | | | SCAC4 |
| 156 | RSEN | ROSE TRANSPORTATION | | | SCAC3 |
| 157 | RSEN | ROSE TRANSPORTATION | | | SCAC4 |
| 158 | RSEO | R S ELECTRONICS | | | SCAC3 |
| 159 | RSEP | RED STAR EXPRESS LINES OF ONTARIO L | | | SCAC3 |
| 160 | RSEP | R S EXPRESS INC | | | SCAC4 |
| 161 | RSEQ | RISSER, M D TRUCKING | | | SCAC4 |
| 162 | RSER | ROSE TRANSPORT INC | | | SCAC3 |
| 163 | RSES | R S EXPRESS | | | SCAC3 |
| 164 | RSES | RIOS EXPRESS | | | SCAC4 |
| 165 | RSET | REESE TRUCKING INC | | | SCAC3 |
| 166 | RSEU | REEFER SALES EUROPE BV | | NL | BIC |
| 167 | RSEV | RELIABLE SERVICES INC | | | SCAC3 |
| 168 | RSEW | R & S EXPRESS LLC | | | SCAC4 |
| 169 | RSEX | Riverside Chemical Co. | added 1/1975; 1/1975; eliminated 4/1978 | | NAKINA |
| 170 | RSEX | Riverside Chemical Co. | added 1/75; 1/75; eliminated 4/78 | | NRHS |
| 171 | RSEX | RIVERSIDE CHEMICAL CO. | | | PWRC |
| 172 | RSF | Royal Saudi Air Force | Callsign: Arsaf, | SA | AVCODES |
| 173 | RSF | Royal Saudi Air Force | | | ICAO1 |
| 174 | RSFA | ROYAL SAFARI INCORPORATED | | | SCAC3 |
| 175 | RSFA | R & S FREIGHT SYSTEMS INC | | | SCAC4 |
| 176 | RSFC | ROSY SERVICES FORWARDERS CORP | | | SCAC3 |
| 177 | RSFD | RITCHIE-SMITH FEEDS INC | | | SCAC4 |
| 178 | RSFI | R S FREIGHT CO | | | SCAC3 |
| 179 | RSFI | ROLLING STAR FREIGHTLINES INC | | | SCAC4 |
| 180 | RSFL | RUSFLOT SHIPPING LINE | | | SCAC3 |
| 181 | RSFM | ROSA FLORA LIMITED | | | SCAC4 |
| 182 | RSFN | RISING FENIX INC | | | SCAC3 |
| 183 | RSFO | RED SPRINGS FUEL OIL CO INC | | | SCAC4 |
| 184 | RSFP | ROSHELL FREIGHT SOLUTIONS INC | | | SCAC4 |
| 185 | RSFQ | ROSS FREIGHT COMPANY INC. | | | SCAC3 |
| 186 | RSFR | ROSE TRANSFER INC | | | SCAC3 |
| 187 | RSFS | REDSTONE FREIGHT SYSTEM OF TEXAS IN | | | SCAC3 |
| 188 | RSFS | ROSEAU FARM SERVICE | | | SCAC4 |
| 189 | RSFU | RSL FREIGHT CO LLC | | UAE | BIC |
| 190 | RSFW | ROSLYN FORWARDERS INC | | | SCAC3 |
| 191 | RSFZ | TRANSAMERICA LEASING INC [(REAZ) ATCHISON, TOPEKA & SANTA FE] | | | PWRC |
| 192 | RSFZ | TAL International | | | RSRV |
| 193 | RSG | Aero Services | Callsign: Servo, | SN | AVCODES |
| 194 | RSG | The Red Sea Air Services Company | | SA | AVCODES |
| 195 | RSGC | ROSS GLOVE CO | | | SCAC4 |
| 196 | RSGD | RIGEL SCHIFFAHRTS GMBH & CO KG MT D | | | SCAC4 |
| 197 | RSGE | ROSENGRANT, TIM | | | SCAC4 |
| 198 | RSGG | RODRIGUEZ, SILVIA GUADALUPE | | | SCAC4 |
| 199 | RSGH | RIGEL SCHIFFAHRTS GMBH & CO KG MT H | | | SCAC4 |
| 200 | RSGI | RIGEL SCHIFFAHRTS GMBH & CO KG MT I | | | SCAC4 |
