| 1 | RTM | Aero Express Del Ecuador Trans AM | IATA: 7T, Callsign: Aero Transam, IATA Prefix: 144, DHL Ecuador | EC | AVCODES |
| 2 | RTM | Trans Am Compania | | | ICAO1 |
| 3 | RTM | The Railway Transfer Co. of the City of Minneapolis | 1/1975-1/1980; eliminated 4/1984 | | NAKINA |
| 4 | RTM | The Railway Transfer Co. of the City of Minneapolis | 1/75-1/80; eliminated 4/84 | | NRHS |
| 5 | RTM | RAILWAY TRANSFER COMPANY OF MINNEAPOLIS | | | PWRC |
| 6 | RTM | Rotterdamsche Tramweg Maatschappij | | NL | TRAFFIC |
| 7 | RTMA | RTM COMPANY LLC | | | SCAC4 |
| 8 | RTMA | | Real: RTM, City: Marseille | F | TRAFFIC |
| 9 | RTMB | ROBINSON ENTERPRISES INVESTMENT COM | | | SCAC4 |
| 10 | RTMC | RAP TRUCKING MINORITY CO | | | SCAC3 |
| 11 | RTME | RM TRUCKING | | | SCAC4 |
| 12 | RTMF | READY TO MOVE | | | SCAC4 |
| 13 | RTMG | REALTIME TRANSPORT LLC | | | SCAC4 |
| 14 | RTMH | R3 MOTORSPORTS | | | SCAC4 |
| 15 | RTMI | RAYS TRUCKING INC | | | SCAC3 |
| 16 | RTMIN | Rio Tinto Minera | Real: RT | E | TRAFFIC |
| 17 | RTMJ | R T M TRANSPORTATION INC | | | SCAC4 |
| 18 | RTML | RAPID TRANS-MOVERS LLC | | | SCAC4 |
| 19 | RTMM | RTM TRUCKING | | | SCAC3 |
| 20 | RTMN | RTM NAVIGATION INC | | | SCAC3 |
| 21 | RTMN | RTM NAVIGATION INC | | | SCAC4 |
| 22 | RTMP | RTM TRANSPORT LTD | | | SCAC4 |
| 23 | RTMQ | ROTHERMEL & SONS LTD | | | SCAC3 |
| 24 | RTMQ | RTM TRANSPORTATION LLC | | | SCAC4 |
| 25 | RTMR | RETRAMAR S A | | | SCAC4 |
| 26 | RTMS | REED TRUCKING INC | | | SCAC3 |
| 27 | RTMU | ROTTERDAM TANKCONTAINERS LEASING | | NL | BIC |
| 28 | RTMU | ROTTERDAM TANKCONTAINER LEASING | | | SCAC4 |
| 29 | RTMV | R T M SERVICES | | | SCAC3 |
| 30 | RTMV | RTM SERVICES | | | SCAC4 |
| 31 | RTMX | General Electric Rail Services Corp. | added 1/2000; 7/2000-7/2005 | | NAKINA |
| 32 | RTMX | General Electric Railcar Services Corp. | added 4/1988; 1/1994; eliminated 1/2000 | | NAKINA |
| 33 | RTMX | Richmond Leasing Co. | added 4/1974; 1/1975-1/1980; eliminated 4/1988 | | NAKINA |
| 34 | RTMX | Marathon Leasing Co. | added 10/1970; eliminated 4/1974 | | NAKINA |
| 35 | RTMX | Richmond Tank Car & Manufacturing Co. | added 4/1968; eliminated 1/1969; added 7/1970; eliminated 10/1970 | | NAKINA |
| 36 | RTMX | Richmond Tank Car & Manufacturing Co. | added 4/68; eliminated 1/69; added 7/70; eliminated 10/70 | | NRHS |
| 37 | RTMX | Marathon Leasing Co. | added 10/70 | | NRHS |
| 38 | RTMX | Richmond Leasing Co. | 1/75-1/80; eliminated 4/88 | | NRHS |
| 39 | RTMX | General Electric Railcar Services Corp. | added 4/88; 1/94; eliminated 1/2000 | | NRHS |
| 40 | RTMX | General Electric Rail Services Corp. | added 1/2000; 7/2000 | | NRHS |
| 41 | RTMX | (NATX) GENERAL ELECTRIC RAIL SERVICES CORP. [RICHMOND LEASING CO.; MARATHON LEASING CO.] | | | PWRC |
| 42 | RTMX | Richmond Leasing | | | RSRV |
| 43 | RTMX | GENERAL ELECTRIC RAILCAR SERVICES C | | | SCAC4 |
| 44 | RTMY | RTM LINES | | | SCAC4 |
| 45 | RTMZ | (REAZ) TRANSAMERICA LEASING, INC. | | | PWRC |
| 46 | RTMZ | TIP Intermodal Services | | | RSRV |
| 47 | RTMZ | TRANSPORT INTERNATIONAL POOL INC | | | SCAC4 |
