| 1 | RSR | Aero-Service | IATA: BF, Callsign: Congoserv, | RCB | AVCODES |
| 2 | RSR | Aero-Service | IATA: BF | | ICAO1 |
| 3 | RSR | Rochester & Southern R.R., Inc. | added 10/1986; eliminated 7/1993; 1/1994-7/2005 | | NAKINA |
| 4 | RSR | Rochester & Southern R.R., Inc. | added 10/86; eliminated 7/93; 1/94-7/2000 | | NRHS |
| 5 | RSR | ROCHESTER & SOUTHERN RAILROAD, INC. | | | PWRC |
| 6 | RSR | Rochester and Southern Railroad | | | RSRV |
| 7 | RSRB | RISING SON RECORDS | | | SCAC4 |
| 8 | RSRC | RESOURCE TRANSPORT INC | | | SCAC4 |
| 9 | RSRD | REISNER DISTRIBUTING INC | | | SCAC4 |
| 10 | RSRE | R S R ENTERPRISES LTD | | | SCAC3 |
| 11 | RSRE | RS RUSH TRANSFER XPRESS INC | | | SCAC4 |
| 12 | RSRG | ROSERIDGE TRUCKING INC | | | SCAC4 |
| 13 | RSRI | REVERE SMELTING & REFINING CORP | | | SCAC3 |
| 14 | RSRI | RICER CO INC | | | SCAC4 |
| 15 | RSRK | ROBINSON, RICKY | | | SCAC3 |
| 16 | RSRL | ROIATTI SRL | | | SCAC4 |
| 17 | RSRM | RSR MOTORSPORTS | | | SCAC4 |
| 18 | RSRO | REFRIGERADOS SAN ROBERTO SA DE CV | | | SCAC4 |
| 19 | RSRP | ROADSTAR TRANSPORT COMPANY LTD | | | SCAC4 |
| 20 | RSRQ | ROSE STAR TRANSPORTATION LLC | | | SCAC4 |
| 21 | RSRU | NORFOLK SOUTHERN RAILWAY COMPANY | | | PWRC |
| 22 | RSRX | Revere Sugar Refinery | 1/1943-4/1947; added 4/1953; 7/1954-1/1975; eliminated 1/1979 | | NAKINA |
| 23 | RSRX | *REVERE SUGAR REFINERY | | | PWRC |
| 24 | RSRX | *RIMROCK SCENIC RAIL TOURS | | | PWRC |
| 25 | RSRX | REVERE SUGAR REFINERY | | | SCAC3 |
| 26 | RSRY | RAYS SEPTIC & ROOTER SERVICES LTD | | | SCAC4 |
| 27 | RSRZ | (NS) RETIRED 04-06-93 ATP | | | PWRC |
| 28 | RSRZ | Norfolk Southern Railway | | | RSRV |
