| 1 | RBX | ArubaExel | Callsign: Aruba, Ceased operations | ARU | AVCODES |
| 2 | RBX | Arubaexel | | | ICAO1 |
| 3 | RBX | RINGLING BROTHERS, BARNUM & BAILEY CIRCUS | | | PWRC |
| 4 | RBXA | RED BARN TRANSPORTATION INC | | | SCAC4 |
| 5 | RBXC | TRANS DIV ASSIGNMENT - BOX CAR POOLING | | | PWRC |
| 6 | RBXE | ROBERTS EXPRESS OIL | | | SCAC4 |
| 7 | RBXG | ROBERTS TRANSPORT INC | | | SCAC4 |
| 8 | RBXI | RED BARON EXPRESS INC | | | SCAC3 |
| 9 | RBXN | RED BIRD EXPRESS INC | | | SCAC3 |
| 10 | RBXN | ROBINSON TRANSPORT INC | | | SCAC4 |
| 11 | RBXO | ROBCO TRANSPORTATION CORP | | | SCAC4 |
| 12 | RBXP | RELIABLE EXPRESS TRUCKING CO | | | SCAC4 |
| 13 | RBXQ | R-B EXPRESS INC | | | SCAC3 |
| 14 | RBXR | ROBERTS X-PRESS CARRIERS (DIV OF H | | | SCAC3 |
| 15 | RBXS | RELIABLE EXPRESS SERVICE INC | | | SCAC3 |
| 16 | RBXS | RBX SA DE CV | | | SCAC4 |
| 17 | RBXU | RABANCO COMPANIES | | | SCAC4 |
