| 1 | NMCX | National Machinery Co. | added 4/1976; 1/1980-1/1994; eliminated 10/1998; 7/2000 (not listed) | | NAKINA |
| 2 | NMCX | Merchants Despatch Transportation Corp. | added 7/1962; 7/1965-10/1966; eliminated 4/1967; 4/1970 | | NAKINA |
| 3 | NMCX | Northern Refrigerator Line, Inc. | added 10/1955; 10/1957-4/1961; eliminated 7/1962 | | NAKINA |
| 4 | NMCX | Northern Refrigerator Line, Inc. | 10/57-4/61 | | NRHS |
| 5 | NMCX | Merchants Despatch Transportation Corp. | 7/65-10/66; eliminated 4/67; 4/70 | | NRHS |
| 6 | NMCX | National Machinery Co. | added 4/76; 1/80-1/94; eliminated 10/98; 7/2000 | | NRHS |
| 7 | NMCX | NATIONAL MACHINERY COMPANY (MERCHANTS DESPATCH TRANSPORTATION CORP.[NORTHERN REFRIGERATOR LINE INC.]) | | | PWRC |
| 8 | NMCX | National Machinery | | | RSRV |