| 1 | DKS | Union Pacific R.R. Co. | added 4/1997; 7/2000-7/2005 | | NAKINA |
| 2 | DKS | Missouri Pacific System | eliminated 4/1997 | | NAKINA |
| 3 | DKS | Doniphan, Kensett & Searcy Ry. | 1/1975; added 1/1977; 1/1980-1/1994 | | NAKINA |
| 4 | DKS | Doniphan, Kensett & Searcy Ry. | 1/75; added 1/77; 1/80-1/94 | | NRHS |
| 5 | DKS | Missouri Pacific System | eliminated 4/97 | | NRHS |
| 6 | DKS | Union Pacific R.R. Co. | added 4/97; 7/2000 | | NRHS |
| 7 | DKS | UP [MISSOURI PACIFIC] [DONIPHAN, KENSETT & SEARCY RY.] | | | PWRC |
| 8 | DKS | Doniphan, Kensett and Searcy Railway (Union Pacific Railroad) | | | RSRV |
| 9 | DKSB | DADDY K'S LLC | | | SCAC4 |
| 10 | DKSC | DICKINSON, R CRAIG & SON | | | SCAC4 |
| 11 | DKSE | DELTA KANARIS SPECIAL MARITIME ENTE | | | SCAC4 |
| 12 | DKSG | DICKMAN SARGEANT ENERGY CORP | | | SCAC4 |
| 13 | DKSI | DICKISON, CLAYTON M LTD | | | SCAC4 |
| 14 | DKSK | DUNKLEYS SPECIALIZED TRUCKING INC | | | SCAC4 |
| 15 | DKSL | DUKES OF OIL | | | SCAC4 |
| 16 | DKSP | D K S TRANSPORT | | | SCAC4 |
| 17 | DKSQ | D & K SERVICE | | | SCAC4 |
| 18 | DKSR | DARK STAR TRANSPORT INC | | | SCAC4 |
