| 1 | NATX | General Electric Rail Services Corp. | added 1/2000; 7/2000-7/2005 | | NAKINA |
| 2 | NATX | General Electric Railcar Services Corp. | added 1/1984; 1/1994; eliminated 1/2000 | | NAKINA |
| 3 | NATX | North American Car Corp. | 1/1950-1/1980; eliminated 1/1984 | | NAKINA |
| 4 | NATX | North American Tank Line (North American Car Corp.) | 1/1941-4/1947 | | NAKINA |
| 5 | NATX | North American Tank Line | 7/1937-4/1938 | | NAKINA |
| 6 | NATX | North American Tank Line (North American Car Corp.) | 7/1930-7/1935 | | NAKINA |
| 7 | NATX | North American Tank Line (North American Car Co.) | 8/1920-7/1923 | | NAKINA |
| 8 | NATX | North American Tank Line (North American Car Corp.) | Apr-38 | | NRHS |
| 9 | NATX | North American Car Corp. | 1/52-1/80 | | NRHS |
| 10 | NATX | General Electric Railcar Services Corp. | 1/94; eliminated 1/2000 | | NRHS |
| 11 | NATX | General Electric Rail Services Corp. | added 1/2000; 7/2000 | | NRHS |
| 12 | NATX | GENERAL ELECTRIC RAIL SERVICES CORP.[NORTH AMERICAN CAR CORP.; NORTH AMERICAN TANK LINE] | | | PWRC |
| 13 | NATX | North American Tank Line (GE Rail Services) | | | RSRV |
| 14 | NATX | GENERAL ELECTRIC RAILCAR SERVICES C | | | SCAC4 |
| 15 | NATX | North Americal Tank Line | | USA | TRAFFIC |