| 1 | RTC | Rail Traction Company | | I | TRAFFIC |
| 2 | RTC | Rail Traction Company | | IT | VKM |
| 3 | RTCA | RANDOLPH TRUCKING COMPANY INC | | | SCAC3 |
| 4 | RTCA | ROOT CELLAR ANTIQUES | | | SCAC4 |
| 5 | RTCC | RINEHOLD TRUCKING COMPANY INC | | | SCAC4 |
| 6 | RTCD | RIGHT TRANSPORTATION CO | | | SCAC4 |
| 7 | RTCF | RTCT TRANSPORT LTD | | | SCAC4 |
| 8 | RTCH | RED & TAN CHARTER INC | | | SCAC3 |
| 9 | RTCH | REGULATORY SOLUTIONS INC | | | SCAC4 |
| 10 | RTCJ | RENES TRUCKING INC | | | SCAC4 |
| 11 | RTCK | ROBIN TRUCK LINE INC | | | SCAC3 |
| 12 | RTCL | RTC LTD | | | SCAC3 |
| 13 | RTCM | RUSSELL TRANSPORT CORP | | | SCAC4 |
| 14 | RTCN | RIVERVIEW TOURS CORPORATION | | | SCAC3 |
| 15 | RTCN | R E TRUCKING | | | SCAC4 |
| 16 | RTCO | RELIABLE TRANSFER CO | | | SCAC3 |
| 17 | RTCP | R A C TRANSPORT COMPANY INC | | | SCAC3 |
| 18 | RTCP | RATT INC | | | SCAC4 |
| 19 | RTCQ | ROBERTS TRUCKING CO | | | SCAC3 |
| 20 | RTCQ | Reseau de transport de la Capitale | Real: RTC, City: Quebec | CDN | TRAFFIC |
| 21 | RTCR | RTC TRANSPORTATION INC (A DIV OF RO | | | SCAC3 |
| 22 | RTCR | ROTEC INDUSTRIES INC | | | SCAC4 |
| 23 | RTCSN | Regional Transportation Commission of Southern Nevada | City: Las Vegas | USA | TRAFFIC |
| 24 | RTCT | RAINBOW TRUCKING CO AND CHEMICAL TR | | | SCAC3 |
| 25 | RTCT | RTC LOGISTICS INC | | | SCAC4 |
| 26 | RTCU | RAJ ORGOCHEM PVT LTD | | IND | BIC |
| 27 | RTCU | OY RAILTRANS LTD | | | SCAC4 |
| 28 | RTCX | Union Tank Car Co. | added 7/1977; 1/1980-7/2005 | | NAKINA |
| 29 | RTCX | Republic Car Line Inc. | added 7/1964; 7/1965-1/1975; eliminated 7/1977 | | NAKINA |
| 30 | RTCX | Republic Tank Car Co. | 1/1943-4/1961; eliminated 7/1964 | | NAKINA |
| 31 | RTCX | Republic Tank Car Co. | 1/52-4/61; eliminated 7/64 | | NRHS |
| 32 | RTCX | Republic Car Line Inc. | added 7/64; 7/65-1/75; eliminated 7/77 | | NRHS |
| 33 | RTCX | Union Tank Car Co. | added 7/77; 1/80-7/2000 | | NRHS |
| 34 | RTCX | (UTCX) UNION TANK CAR CO [REPUBLIC TANK CAR CO.] | | | PWRC |
| 35 | RTCX | Republic Tank Car Co. (Union Tank Car) | | | RSRV |
| 36 | RTCX | REPUBLIC CAR LINE INC | | | SCAC3 |
| 37 | RTCX | UNION TANK CAR CO | | | SCAC4 |
| 38 | RTCX | Republic Tank Car Co. | | USA | TRAFFIC |
| 39 | RTCY | RICHARD TRANSPORT COMPANY INC | | | SCAC3 |
| 40 | RTCY | R TWO (R2) LOGISTICS INC | | | SCAC4 |
| 41 | RTCZ | Rocor Freight Services | | | RSRV |
| 42 | RTCZ | ROCOR FREIGHT SERVICES | | | SCAC4 |
