| 1 | RBO | Rainbow Cargo Express | Callsign: Race, | GH | AVCODES |
| 2 | RBO | Regionalbus Ostbayern GmbH | | D | TRAFFIC |
| 3 | RBOA | ROBERTSON, OSCAR & ASSOCIATES INC | | | SCAC3 |
| 4 | RBOB | ROTHWELL, BOB | | | SCAC4 |
| 5 | RBOC | RAINBOW CARRIERS INC | | | SCAC3 |
| 6 | RBOC | ROBERT B OUR CO INC | | | SCAC4 |
| 7 | RBOD | ROCHELLE-ASHTON-BYRON OREGON READY | | | SCAC3 |
| 8 | RBOF | RELIABLE ON TIME FREIGHT | | | SCAC4 |
| 9 | RBOH | ROBO TRUCKING INC | | | SCAC3 |
| 10 | RBOH | RED BALL MOVING AND STORAGE OF | | | SCAC4 |
| 11 | RBOI | ROBO TRUCKING INC | | | SCAC3 |
| 12 | RBOI | ROBERTSON OIL CO INC | | | SCAC4 |
| 13 | RBOL | RAINBOW LEASING INC | | | SCAC3 |
| 14 | RBOL | ROBINSON OIL | | | SCAC4 |
| 15 | RBON | ROBINSONS TRUCKING | | | SCAC3 |
| 16 | RBOR | RAINBOW TOURS | | | SCAC3 |
| 17 | RBOR | RAMBO TRANSPORT LLC | | | SCAC4 |
| 18 | RBOS | ROBERTOS LIMOUSINE SERVICE INC | | | SCAC3 |
| 19 | RBOT | RAINBOW TRANSPORT, INC | | | SCAC3 |
| 20 | RBOU | REEFERBOX CO | | DK | BIC |
| 21 | RBOW | RAINBOW TRANSPORTATION, INC | | | SCAC3 |
| 22 | RBOW | RAINBOW LOGISTICS LLC | | | SCAC4 |
| 23 | RBOX | TTX Co. | added 4/2000; 7/2000-7/2005 | | NAKINA |
| 24 | RBOX | American Rail Box Car Co. | added 10/1974; 1/1975; eliminated 7/1979 | | NAKINA |
| 25 | RBOX | Railbox Co. | added 7/1979; 1/1980-1/1994; eliminated 4/2000 | | NAKINA |
| 26 | RBOX | American Rail Box Car Co. | added 10/1974; 1/1975; eliminated 7/1979 | | NAKINA |
| 27 | RBOX | Railbox Co. | added 7/1979; 1/1980-1/1994; eliminated 4/2000 | | NAKINA |
| 28 | RBOX | TTX Co. | added 4/2000; 7/2000 | | NAKINA |
| 29 | RBOX | American Rail Box Car Co. | added 10/74; 1/75; eliminated 7/79 | | NRHS |
| 30 | RBOX | Railbox Co. | added 7/79; 1/80-1/94; eliminated 4/2000 | | NRHS |
| 31 | RBOX | TTX Co. | added 4/2000; 7/2000 | | NRHS |
| 32 | RBOX | TTX CO. [RAILBOX COMPANY] | | | PWRC |
| 33 | RBOX | Railbox (TTX Corporation) | | | RSRV |
| 34 | RBOX | AMERICAN RAIL BOX CAR COMPANY | | | SCAC3 |
| 35 | RBOX | TTX COMPANY | | | SCAC4 |
| 36 | RBOX | Railbox | | USA | TRAFFIC |
| 37 | RBOY | ROBINSON OIL COMPANY | | | SCAC4 |
