| 1 | QOPX | General Electric Rail Services Corp. | added 1/2000; 7/2000-7/2005 | | NAKINA |
| 2 | QOPX | General Electric Railcar Services Corp. | added 1/1988; 1/1994; eliminated 1/2000 | | NAKINA |
| 3 | QOPX | General Electric Railcar Services Corp. | added 1/88; 1/94; eliminated 1/2000 | | NRHS |
| 4 | QOPX | General Electric Rail Services Corp. | added 1/2000; 7/2000 | | NRHS |
| 5 | QOPX | (NATX) GENERAL ELECTRIC RAIL SERVICES CORPORATION | | | PWRC |
| 6 | QOPX | General Electric Rail Services Corporation | | | RSRV |
| 7 | QOPX | GENERAL ELECTRIC RAILCAR SERVICES C | | | SCAC4 |
