| 1 | SCOX | The Southern Cotton Oil Co. | 8/1920-7/1923 | | NAKINA |
| 2 | SCOX | The Sco Tank Line, Inc. | 7/1930-1/1946 | | NAKINA |
| 3 | SCOX | Shippers' Car Line Corp. | 4/1947 | | NAKINA |
| 4 | SCOX | Scoular Bishop Grain Co. | added 4/1979; 1/1980; eliminated 7/1985 | | NAKINA |
| 5 | SCOX | Scoular Grain Co. | added 7/1985 | | NAKINA |
| 6 | SCOX | The Scoular Co. | 1/1994; eliminated 10/1999; 7/2000-7/2005 (not listed) | | NAKINA |
| 7 | SCOX | The Sco Tank Line, Inc. | Apr-38 | | NRHS |
| 8 | SCOX | Scoular Bishop Grain Co. | added 4/79; 1/80 | | NRHS |
| 9 | SCOX | The Scoular Co. | 1/94; eliminated 10/99; 7/2000 | | NRHS |
| 10 | SCOX | *SOUTHERN COTTON OIL CO. | | | PWRC |
| 11 | SCOX | *SHIPPERS' CAR LINE, INC. [SCO TANK LINE, INC.] | | | PWRC |
| 12 | SCOX | *SCOULAR CO. [SCOULAR BISHOP GRAIN COMPANY] | | | PWRC |
| 13 | SCOX | Scoular Bishop Grain | | | RSRV |
| 14 | SCOX | SCOULAR COMPANY, THE | | | SCAC4 |
| 15 | SCOX | The Scoular Co. | | USA | TRAFFIC |
