| 1 | DMR | Helidosa Aviation Group | Callsign: Helidosa, | DOM | AVCODES |
| 2 | DMR | Dampfbahnfreunde mittlerer Rennsteig eV | Stützerbach | D | privat-bahn.de |
| 3 | DMR | DETROIT MANUFACTURERS RAILROAD | | | PWRC |
| 4 | DMR | Disney World monorail | | USA | TRAFFIC |
| 5 | DMRC | Delhi Metro Rail Corporation Ltd. | | IND | TRAFFIC |
| 6 | DMRE | DEMETER, EDWARD | | | SCAC4 |
| 7 | DMRJ | DMR TRUCKING INC | | | SCAC4 |
| 8 | DMRM | DUQUE MARTINEZ, RICARDO ALEJANDRO | | | SCAC4 |
| 9 | DMRO | DIAZ MIRANDA, ARTURO | | | SCAC4 |
| 10 | DMRP | DEMOTRONIC CORPORATION | | | SCAC4 |
| 11 | DMRS | DAMAR TRANSPORTATION INC | | | SCAC4 |
| 12 | DMRV | DIAMOND TRANSPORTATION SERVICES INC | | | SCAC4 |
| 13 | DMRX | Decker Meat Refrigerator Line (General American Transportation Corp.) | 7/1935-4/1938 | | NAKINA |
| 14 | DMRX | Decker Meat Refrigerator Line (Jacob E. Decker & Sons) | 7/1930-7/1932 | | NAKINA |
| 15 | DMRX | Decker Meat Refrigerator Line (General American Transportation Corp.) | Apr-38 | | NRHS |
| 16 | DMRX | GENERAL AMERICAN TRANSPORTATION CORP. (DECKER MEAT REFRIGERATOR LINE, JOSEPH E. DECKER & SONS) | | | PWRC |
