| 1 | RSI | Air Sunshine, Inc. | IATA: YI, Callsign: Air Sunshine, Designator YI recalled by IATA. Accounting Code 806 recalled by IATA. | USA | AVCODES |
| 2 | RSI | Air Sunshine, Inc. | Callsign: Air Sunshine, Designator YI recalled by IATA. Accounting Code 806 recalled by IATA. | USA | AVCODES |
| 3 | RSI | Air Sunshine | | | ICAO1 |
| 4 | RSIA | RG SHIPPING INTERNATIONAL | | | SCAC4 |
| 5 | RSIB | ROSSI BUILDING MATERIALS | | | SCAC3 |
| 6 | RSIC | RISS INTERMODAL CORP | | | SCAC3 |
| 7 | RSIC | ROAD SYSTEMS INC | | | SCAC4 |
| 8 | RSIE | ROSIE ENTERPRISES INC | | | SCAC3 |
| 9 | RSIH | RECOGNITION SYSTEMS INC | | | SCAC4 |
| 10 | RSII | RISS INTERMODAL CORPORATION II | | | SCAC3 |
| 11 | RSII | REIST INDUSTRIES INC | | | SCAC4 |
| 12 | RSIK | RTS & SON INC | | | SCAC4 |
| 13 | RSIN | RSI RELO INC | | | SCAC4 |
| 14 | RSIO | RIDE SOURCE INC | | | SCAC4 |
| 15 | RSIQ | RAILPORT SERVICES INC | | | SCAC4 |
| 16 | RSIR | REISER, WM C | | | SCAC3 |
| 17 | RSIS | ROSSI SHIPPING CO LTD. | | | SCAC3 |
| 18 | RSIS | REFRIGERATION SERVICES INC | | | SCAC4 |
| 19 | RSIT | ROSSELLI TRUCKING INC | | | SCAC3 |
| 20 | RSIT | RSI PETROLEUM PRODUCTS | | | SCAC4 |
| 21 | RSIU | RASA INDUSTRIES, LTD. | | J | BIC |
| 22 | RSIU | RATHMORE INTERNATIONAL INC. | | | SCAC3 |
| 23 | RSIV | RIDGE SERVICES INC | | | SCAC4 |
| 24 | RSIW | RELIABLE SHIPPING INC | | | SCAC4 |
| 25 | RSIX | The Reid Supply Co. | added 7/1955; 10/1957-4/1961; eliminated 10/1962 | | NAKINA |
| 26 | RSIX | The Reid Supply Co. | added 7/55; 10/57-4/61 | | NRHS |
| 27 | RSIX | *REID SUPPLY CO. | | | PWRC |
| 28 | RSIX | *RAIL SWITCHING, LLC | | | PWRC |
| 29 | RSIX | RAIL MANAGEMENT SYSTEMS INC | | | SCAC4 |
| 30 | RSIY | RESQTECH SYSTEMS INC | | | SCAC4 |
| 31 | RSIZ | RAIL SERVICES, INC. | | | PWRC |
| 32 | RSIZ | Rail Services | | | RSRV |
| 33 | RSIZ | RAIL SPEDITION GESELL, M.B.H. | | | SCAC3 |
| 34 | RSIZ | RAIL SERVICES, INC. | | | SCAC4 |
