| 1 | RPH | PT. Republic Express Airlines | IATA: RV, IATA designator changed to RH | RI | AVCODES |
| 2 | RPH | Republic Express Airlines, Pt. | IATA: RH, Callsign: Public Express, IATA designator changed from RV | RI | AVCODES |
| 3 | RPH | Republic Express Airlines | IATA: RH | | ICAO1 |
| 4 | RPHC | R P H IRRIGATION SERVICES LTD | | | SCAC4 |
| 5 | RPHL | REFACCIONES E IMPLEMENTOS HEREDIA S | | | SCAC4 |
| 6 | RPHP | RALPHS PRODUCE | | | SCAC3 |
| 7 | RPHX | National Car Co. | 1/1952-7/1954; eliminated 1/1956 | | NAKINA |
| 8 | RPHX | National Car Co. | Jan-52 | | NRHS |
| 9 | RPHX | NATIONAL CAR CO. | | | PWRC |
