| 1 | DGNA | DOMINION GRANITE LTD | | | SCAC4 |
| 2 | DGNC | DESIGN CORRUGATING CO | | | SCAC4 |
| 3 | DGNK | DELONG AND SONS TRUCKING INC | | | SCAC4 |
| 4 | DGNO | Dallas, Garland & Northeastern R.R., Inc. | 1/1994; added 7/1994; 7/2000-7/2005 | | NAKINA |
| 5 | DGNO | Dallas, Garland & Northeastern R.R., Inc. | 1/94; added 7/94; 7/2000 | | NRHS |
| 6 | DGNO | DALLAS, GARLAND & NORTHEASTERN RAILROAD, INC. | | | PWRC |
| 7 | DGNO | Dallas, Garland and Northeastern Railroad | | | RSRV |
| 8 | DGNO | DALLAS GARLAND & NORTHEASTERN RAILR | | | SCAC4 |
| 9 | DGNO | Dallas, Garland & Northeastern R.R., Inc. | | USA | TRAFFIC |
| 10 | DGNR | DIGGINS AND ROSE INC | | | SCAC4 |
| 11 | DGNS | DRAGON STAR INC | | | SCAC4 |
| 12 | DGNV | DIGREGORIO NAVEGACAS | | | SCAC1 |
| 13 | DGNV | DG & V REIMER | | | SCAC4 |
