| 1 | RDK | Irish Air Transport Ltd. | Callsign: Irish Trans, | IRL | AVCODES |
| 2 | RDK | Memorial Hermann Hospital System Life Flight | Callsign: Red Duke, | USA | AVCODES |
| 3 | RDK | Irish Air Transport | | | ICAO1 |
| 4 | RDK | Railion Denmark | | DK | VKM |
| 5 | RDKA | ROADLINK TRANSPORTATION SOLUTIONS ( | | | SCAC4 |
| 6 | RDKC | RADTKE CARTAGE INC | | | SCAC3 |
| 7 | RDKC | REDEKOP MANUFACTURING COMPANY | | | SCAC4 |
| 8 | RDKE | RADKE, JOHN | | | SCAC3 |
| 9 | RDKF | RED ROCK TRANSFER INC | | | SCAC4 |
| 10 | RDKG | REID TRUCKING, INC | | | SCAC3 |
| 11 | RDKI | R & D TRUCKING INC | | | SCAC3 |
| 12 | RDKI | RODRIGUEZ TRUCKING | | | SCAC4 |
| 13 | RDKM | REED TRUCKING | | | SCAC4 |
| 14 | RDKP | ROAD KINGS TRANSPORT LLC | | | SCAC4 |
| 15 | RDKQ | RIDDLE TRUCKING | | | SCAC4 |
| 16 | RDKR | ROAD KING EXPRESS | | | SCAC4 |
| 17 | RDKS | R & D TRUCK SERVICE | | | SCAC3 |
| 18 | RDKS | RDK TRANSPORTATION CO INC | | | SCAC4 |
| 19 | RDKT | RED K TRANSPORT INC | | | SCAC3 |
| 20 | RDKW | REDS TRUCK & WAGON | | | SCAC3 |
