| 1 | MLKX | Merchants Despatch Transportation Co. | 1/1950-4/1970; eliminated 10/1970 | | NAKINA |
| 2 | MLKX | Merchants Despatch Transportation Co. (reporting marks for Milk Products Refrigerator Line) | 7/1937-4/1938 | | NAKINA |
| 3 | MLKX | Milk Products Refrigerator Line (Merchants Despatch, Inc.) | 7/1935 | | NAKINA |
| 4 | MLKX | Milk Products Refrigerater Line (Merchants Despatch Transportation Corp.) | Apr-38 | | NRHS |
| 5 | MLKX | Merchants Despatch Transportation Co. | 1/52-4/70; eliminated 10/70 | | NRHS |
| 6 | MLKX | MERCHANTS DESPATCH TRANSPORTATION CORP. | | | PWRC |
| 7 | MLKX | MILK PRODUCTS REFRIGERATOR LINE (MERCHANTS DESPATCH TRANSPORTATION CO.) | | | PWRC |
