| 1 | TRAX | Terminal Refining Co. (Keystone Oil & Manufacturing Co.) | 8/1920 | | NAKINA |
| 2 | TRAX | American Refrigerator Transit Co. | added 4/1954; 10/1957-4/1970; eliminated 7/1970 | | NAKINA |
| 3 | TRAX | Railtex Corp. | added 7/1978 | | NAKINA |
| 4 | TRAX | Railtex Inc. | 1/1980 | | NAKINA |
| 5 | TRAX | Railtex Corp. | 1/1994 | | NAKINA |
| 6 | TRAX | Railtex Inc. | 7/2000-7/2005 | | NAKINA |
| 7 | TRAX | American Refrigerator Transit Co. | added 4/54; 10/57-4/70; eliminated 7/70 | | NRHS |
| 8 | TRAX | Railtex Corp. | added 7/78 | | NRHS |
| 9 | TRAX | Railtex Inc. | Jan-80 | | NRHS |
| 10 | TRAX | Railtex Corp. | Jan-94 | | NRHS |
| 11 | TRAX | Railtex Inc. | Jul-00 | | NRHS |
| 12 | TRAX | *KEYSTONE OIL & MANUFACTURING CO. [TERMINAL REFINING CO.] | | | PWRC |
| 13 | TRAX | +RAILTEX, INC. [AMERICAN REFRIGERATOR TRANSIT CO.] | | | PWRC |
| 14 | TRAX | Railtex | | | RSRV |
| 15 | TRAX | RAILTEX, INC. | | | SCAC4 |