| 1 | JSR | Jet Star Srl | | MD | AVCODES |
| 2 | JSR | Ava Air | Callsign: Foxair, Liquidarted on 28 September 2017. | MQ | AVCODES |
| 3 | JSRA | JSR TRANSPORT | | | SCAC4 |
| 4 | JSRC | Jackson and Southern R.R. Co. | added 10/1984; eliminated 1/1995; eliminated 7/1995; 7/2000-7/2005 | | NAKINA |
| 5 | JSRC | Jackson and Southern R.R. Co. | added 10/84; eliminated 1/95; eliminated 7/95; 7/2000 | | NRHS |
| 6 | JSRC | JACKSON & SOUTHERN RAILROAD CO. | | | PWRC |
| 7 | JSRC | Jackson and Southern Railroad | | | RSRV |
| 8 | JSRD | JOHNSRUD TRANSPORT INC | | | SCAC4 |
| 9 | JSRG | J & S TRUCKING INC | | | SCAC4 |
| 10 | JSRK | J & S TRUCKING | | | SCAC4 |
| 11 | JSRL | JASCO RESEARCH LTD | | | SCAC4 |
| 12 | JSRM | J & S REFRIGERATED INC | | | SCAC4 |
| 13 | JSRN | J & S TRANSPORTATION LLC | | | SCAC4 |
| 14 | JSRP | JUST RUSH EXPRESS | | | SCAC4 |
| 15 | JSRR | JIM'S RESTORATION | | | SCAC4 |
| 16 | JSRV | JASSAL, RAVINDER | | | SCAC4 |
| 17 | JSRW | Ontario Eastern R.R. Corp. d/b/a Jersey Southern Ry. | added 4/1985; eliminated 4/1987 | | NAKINA |
| 18 | JSRW | Ontario Eastern R.R. Corp. d/b/a Jersey Southern Ry. | added 4/85; eliminated 4/87 | | NRHS |
| 19 | JSRW | JERSEY SOUTHERN RWY. - OWNED BY ONTARIO EASTERN RR. | | | PWRC |
| 20 | JSRW | Jersey Southern Railway | | | RSRV |
| 21 | JSRX | JIM SMITH RAILROAD INC. | | | PWRC |
