| 1 | HSR | Citylink Airlines, Inc. | Callsign: Hoosier, | USA | AVCODES |
| 2 | HSR | Helistar SA | Callsign: Helistar, | GR | AVCODES |
| 3 | HSR | Citylink Airlines | | | ICAO1 |
| 4 | HSRA | H & S TRANSPORTATION INC | | | SCAC4 |
| 5 | HSRC | HANSI'S REFRIGERATED EXPRESS INC | | | SCAC4 |
| 6 | HSRG | HENSON, ROGER TRUCKING LLC | | | SCAC4 |
| 7 | HSRN | HOOSIER TRANSIT INC | | | SCAC4 |
| 8 | HSRO | HASLER OIL COMPANY INC | | | SCAC4 |
| 9 | HSRR | Hardin Southern R.R., Inc. | 1/1994-7/2005 | | NAKINA |
| 10 | HSRR | Hardin Southern R.R., Inc. | 1/94-7/2000 | | NRHS |
| 11 | HSRR | HARDIN SOUTHERN RAILROAD, INC. | | | PWRC |
| 12 | HSRR | Hardin Southern Railroad | | | RSRV |
| 13 | HSRR | HARDIN SOUTHERN RAILROAD INC | | | SCAC4 |
| 14 | HSRR | Hoboken Shore Railroad | | USA | TRAFFIC |
| 15 | HSRS | HAPPY STANS RECYCLING SERVICES LTD | | | SCAC4 |
| 16 | HSRT | HESTER, WAYNE TRUCKING INC | | | SCAC4 |
| 17 | HSRW | Hamilton Street Railway | | CDN | TRAFFIC |
| 18 | HSRZ | H & S RAILROAD [HARTFORD & SLOCOMB RAILROAD COMPANY, INC.] | | | PWRC |
| 19 | HSRZ | H and S Railroad | | | RSRV |
