| 1 | URC | United Railways Co. (Spokane, Portland & Seattle Ry.) | 7/1923-7/1936 | | NAKINA |
| 2 | URC | United Railways Co. | 4/1938-1/1941 | | NAKINA |
| 3 | URC | United Railways Co. | Apr-38 | | NRHS |
| 4 | URC | UNITED RAILWAYS CO. 9SPOKANE, PORTLAND & SEATTLE RWY.) | | | PWRC |
| 5 | URCS | UNITED RELOCATION SYSTEMS INC | | | SCAC4 |
| 6 | URCX | United Refining Co. | 8/1920-4/1970; eliminated 7/1971 | | NAKINA |
| 7 | URCX | United Refining Co. | 4/38-4/70 | | NRHS |
| 8 | URCX | UNITED REFINING CO. | | | PWRC |
