| 1 | GONX | TTX Co. | added 7/2002; 7/2005 | | NAKINA |
| 2 | GONX | Railgon Co. | 1/1980; added 7/1980; 1/1994-7/2000; eliminated 7/2002 | | NAKINA |
| 3 | GONX | Railgon Co. | 1/1980; added 7/1980; 1/1994-7/2000; eliminated 7/2002 | | NAKINA |
| 4 | GONX | TTX Co. | added 7/2002 | | NAKINA |
| 5 | GONX | Railgon Co. | 1/80; added 7/80; 1/94-7/2000 | | NRHS |
| 6 | GONX | RAILGON COMPANY (TTX CORP.) | | | PWRC |
| 7 | GONX | Railgon (TTX Corporation) | | | RSRV |
| 8 | GONX | TTX COMPANY | | | SCAC4 |
| 9 | GONX | Railgon Co. | | USA | TRAFFIC |