| 1 | DTTE | DITTO EXPRESS INC | | | SCAC4 |
| 2 | DTTF | DTR TRANSPORT LLC | | | SCAC4 |
| 3 | DTTH | DART TRANS INC | | | SCAC4 |
| 4 | DTTK | D T TRUCKING | | | SCAC4 |
| 5 | DTTL | DENTON TRANSPORTATION SYSTEMS INC | | | SCAC4 |
| 6 | DTTM | DITTMAN TRUCKING | | | SCAC4 |
| 7 | DTTN | DIMENSION TRANSPORTATION INC | | | SCAC4 |
| 8 | DTTO | DAVERT TOOLS INC | | | SCAC4 |
| 9 | DTTR | DAYBREAK TRANSPORT | | | SCAC4 |
| 10 | DTTS | DAVID THOMAS TOURS INC | | | SCAC4 |
| 11 | DTTT | DON'S TRAILER TRANSPORT, INC | | | SCAC1 |
| 12 | DTTT | DONS TRAILER TRANSPORT INC | | | SCAC4 |
| 13 | DTTV | D-TRUX TRANSPORT LTD | | | SCAC4 |
| 14 | DTTW | DOUBLE-TIME TRANSPORT LLC | | | SCAC4 |
| 15 | DTTX | TTX Co. | added 1/1992; 1/1994-7/2005 | | NAKINA |
| 16 | DTTX | Trailer Train Co. | added 1/1985; eliminated 1/1992 | | NAKINA |
| 17 | DTTX | Trailer Train Co./TTX Co. (well-type COFC cars, capable of carrying double-stacked containers) | added 1/1985; 7/1985-1/1994 | | NAKINA |
| 18 | DTTX | TTX Co. (well-type cars, capable of carrying double-stacked containers, and in some cases trailers) | 7/2000 | | NAKINA |
| 19 | DTTX | Trailer Train Co. | added 1/85; eliminated 1/92 | | NRHS |
| 20 | DTTX | TTX Co. | added 1/92 | | NRHS |
| 21 | DTTX | TTX Co. (well-type COFC cars, capable of carrying double-stacked containers) | Jan-94 | | NRHS |
| 22 | DTTX | TTX Co. (well-type cars, capable of carrying double-stacked containers, and in some cases trailers) | Jul-00 | | NRHS |
| 23 | DTTX | TTX COMPANY | | | PWRC |
| 24 | DTTX | Trailer Train (TTX Corporation) | | | RSRV |
| 25 | DTTX | TTX COMPANY | | | SCAC4 |
| 26 | DTTY | D & T TRUCKING COMPANY | | | SCAC4 |
