| 1 | RGC | Servicios Aeroes Regiomontanos | Callsign: Regiomontano, | MEX | AVCODES |
| 2 | RGC | Servicios Aereos Regiomontanos | | | ICAO1 |
| 3 | RGCA | RIGHT COOPERATIVE ASSOCIATION, THE | | | SCAC4 |
| 4 | RGCE | RIDGE-CREST ENTERPRISES INC | | | SCAC3 |
| 5 | RGCG | REGAL CARTAGE COMPANY | | | SCAC3 |
| 6 | RGCH | REGIONAL COACH | | | SCAC3 |
| 7 | RGCH | RAGAR TRANSPORTATION LTD | | | SCAC4 |
| 8 | RGCL | REGAN COACH LINES | | | SCAC3 |
| 9 | RGCO | REIMER GRAIN CO | | | SCAC3 |
| 10 | RGCP | RING CAN CORPORATION | | | SCAC3 |
| 11 | RGCR | R & G CARRIERS | | | SCAC4 |
| 12 | RGCS | REDINGER, CLIFFORD S TRUCKING | | | SCAC3 |
| 13 | RGCS | R G CRUCES INTERNACIONALES | | | SCAC4 |
| 14 | RGCT | RANEY, GARY C TRUCKING | | | SCAC3 |
| 15 | RGCT | ROCKLAND TRUCKING-N-FORESTRY | | | SCAC4 |
| 16 | RGCU | RAVA GROUP CONTAINER SERVICES | | USA | BIC |
| 17 | RGCU | MULTI GAS LIMITED | | | SCAC4 |
| 18 | RGCX | Rio Grande Chemical Ltd. | added 7/2004; 7/2005 | | NAKINA |
| 19 | RGCX | Rio Grande Chemical Sales Co. | added 4/1979; 1/1980-7/2000; eliminated 7/2004 | | NAKINA |
| 20 | RGCX | Riverside Gas Co. | added 1/1965; 7/1965; eliminated 10/1966; 10/1966 (not listed) | | NAKINA |
| 21 | RGCX | The Roth Gasoline Corp. | 8/1920-7/1923 | | NAKINA |
| 22 | RGCX | Riverside Gas Co. | added 1/65; 7/65; eliminated 10/66 | | NRHS |
| 23 | RGCX | Rio Grande Chemical Sales Co. | added 4/79; 1/80-7/2000 | | NRHS |
| 24 | RGCX | *RIVERSIDE GAS CO. | | | PWRC |
| 25 | RGCX | +RIO GRANDE CHEMICAL LTD. | | | PWRC |
| 26 | RGCX | Rio Grande Chemical Sales | | | RSRV |
| 27 | RGCX | RIVERSIDE GAS CO, THE | | | SCAC3 |
| 28 | RGCX | RIO GRANDE CHEMICAL SALES CO | | | SCAC4 |
| 29 | RGCY | REGENCY SHIPPING CORP | | | SCAC3 |
