| 1 | RHB | Rhein Helikopter AG | Callsign: Rhein Heli, Merged into Swiss Helicopter AG. | CH | AVCODES |
| 2 | RHB | Rhein-Haardtbahn GmbH | Bad Dürkheim | D | privat-bahn.de |
| 3 | RHB | Rhätische Bahn | | CH | TRAFFIC |
| 4 | RHB | Rhätische Bahn (RhB) | | CH | VKM |
| 5 | RHBA | Rhein-Haardt-Bahn | | D | TRAFFIC |
| 6 | RHBD | RED HOT BONDED DELIVERY | | | SCAC3 |
| 7 | RHBD | RHENANIA TRANSPORT BV | | | SCAC4 |
| 8 | RHBG | Rheingold-Zug Betriebsgesellschaft mbH | | DE | VKM |
| 9 | RHBH | ROHRBACH TRUCKING | | | SCAC3 |
| 10 | RHBH | ROHIT TRANSPORT LTD | | | SCAC4 |
| 11 | RHBN | REHBEIN BUS SERVICE INC | | | SCAC3 |
| 12 | RHBRN | Rheinbraun - Rheinische Braunkohlenwerke | | D | TRAFFIC |
| 13 | RHBT | R H B TRUCKING INC | | | SCAC4 |
| 14 | RHBX | R.H. Bogle Co. | 4/1947-1/1980; eliminated 5/1983 | | NAKINA |
| 15 | RHBX | R.H. Bogle Co. | 1/52-1/80; eliminated 5/83 | | NRHS |
| 16 | RHBX | R.H. BOGLE CO. | | | PWRC |
| 17 | RHBX | R. H. Bogle | | | RSRV |
