| 1 | UDTC | UP & DOWN TRUCKING | | | SCAC4 |
| 2 | UDTE | UNITED TRANSPORT SERVICES INC | | | SCAC4 |
| 3 | UDTI | U DIRECT TRANSPORTATION INC | | | SCAC4 |
| 4 | UDTK | UNCLE DONS TRUCKING | | | SCAC4 |
| 5 | UDTL | U DIRECT TRANSPORTATION | | | SCAC4 |
| 6 | UDTO | UNITED DRIVER TRANSPORT INC | | | SCAC4 |
| 7 | UDTP | UNION DE TRANSPORTISTAS DE VALLE HE | | | SCAC4 |
| 8 | UDTR | UD Trucks | Formerly Nissan Diesel Motor Co, now owned by Volvo. | J | TRAFFIC |
| 9 | UDTT | UNIDOS TRANSPORT | | | SCAC4 |
| 10 | UDTZ | UPPER DEERFIELD TOWNSHIP NEW JERSEY | | | PWRC |
