| 1 | MICX | Mississippi Chemical Corp. | added 10/1972; 1/1975-1/1980; eliminated 10/1981 | | NAKINA |
| 2 | MICX | Mis Coa, a partnership of Mississippi Chemical Corp. and Coastal Chemical Corp. | added 7/1971; eliminated 10/1972 | | NAKINA |
| 3 | MICX | Mississippi Chemical Corp. | 1/1952-4/1970; eliminated 7/1971 | | NAKINA |
| 4 | MICX | Mid-Continent Refining Co. | 8/1920-7/1923 | | NAKINA |
| 5 | MICX | Mis Coa, a partnership of Mississippi Chemical Corp. and Coastal Chemical Corp. | eliminated 10/72 | | NRHS |
| 6 | MICX | Mississippi Chemical Corp. | 1/52-4/70 | | NRHS |
| 7 | MICX | Mississippi Chemical Corp. | added 10/72; 1/75-1/80; eliminated 10/81 | | NRHS |
| 8 | MICX | *MID-CONTINENT REFINING CO. | | | PWRC |
| 9 | MICX | *MISSISSIPPI CHEMICAL CO. [MIS COA] | | | PWRC |
| 10 | MICX | CANCELLED ID - FORMERLY A RAILINC TCAM ID | | | PWRC |