| 1 | HRSX | Harbor Rail Services of California, Inc. | 7/2005 (not listed) | | NAKINA |
| 2 | HRSX | Heritage Ry. Service, Inc. | added 7/1986; eliminated 1/1990 | | NAKINA |
| 3 | HRSX | Heritage Ry. Service, Inc. | added 7/86; eliminated 1/90 | | NRHS |
| 4 | HRSX | *HAWAIIAN RAILWAY SOCIETY | | | PWRC |
| 5 | HRSX | +HARBOR RAIL SERVICES OF CALIFORNIA [HERITAGE RAILWAY SERVICE INC.] | | | PWRC |
| 6 | HRSX | Harbor Rail Services of California | | | RSRV |
| 7 | HRSX | HARBOR SERVICES OF CALIFORNIA INC | | | SCAC4 |
