| 1 | JSC | Airstan, Joint-Stock Aviation Company | Callsign: Airstan, | RUS | AVCODES |
| 2 | JSC | Jetstream Aviation Congo | Callsign: Congo River, | RCB | AVCODES |
| 3 | JSC | Johnstown and Stony Creek R.R. Co. | 1/1975-1/1980; eliminated 10/1983 | | NAKINA |
| 4 | JSC | Johnstown and Stony Creek R.R. Co. | 1/75-1/80; eliminated 10/83 | | NRHS |
| 5 | JSC | JOHNSTOWN & STONEY CREEK RAILROAD CO. | | | PWRC |
| 6 | JSCA | JESSICA TRANSPORT SERVICES INC | | | SCAC4 |
| 7 | JSCC | J S CARRIER CORP | | | SCAC4 |
| 8 | JSCC | Jersey Shore Commuter Club | | USA | TRAFFIC |
| 9 | JSCE | J S CARRIERS CORP | | | SCAC4 |
| 10 | JSCF | JIT STEEL CORPORATION | | | SCAC4 |
| 11 | JSCG | J & S CARTAGE INC | | | SCAC4 |
| 12 | JSCH | JOES SEAFOOD CORP | | | SCAC4 |
| 13 | JSCK | JONES, SCOTT KEITH | | | SCAC4 |
| 14 | JSCM | JABERO SALES COMPANY | | | SCAC4 |
| 15 | JSCO | J-STAR CONSOLIDATED INC | | | SCAC4 |
| 16 | JSCQ | JSC RIMSCO | | | SCAC4 |
| 17 | JSCR | JOHNSON & CURRIER TRUCKING CORPORAT | | | SCAC4 |
| 18 | JSCS | JSC YUGREFTRANSFLOT | | | SCAC4 |
| 19 | JSCT | J S C TRUCK LINES | | | SCAC4 |
| 20 | JSCU | JAKE STORAGE CONTAINERS LLC | | USA | BIC |
| 21 | JSCU | FLEXI-VAN LEASING, INC. | | | PWRC |
| 22 | JSCU | Flexi-Van Leasing | | | RSRV |
| 23 | JSCU | GENSTAR CONTAINER CORPORATION | | | SCAC4 |
| 24 | JSCW | JACAMAR SHIPPING CO LTD | | | SCAC4 |
| 25 | JSCX | Consumers Energy Co. | added 1/2007 | | NAKINA |
| 26 | JSCX | CONSUMERS ENERGY CO. | | | PWRC |
| 27 | JSCX | CONSUMERS ENERGY COMPANY | | | SCAC4 |
| 28 | JSCY | JSC TERMINAL LLC | | | SCAC4 |
| 29 | JSCZ | FLEXI-VAN LEASING, INC. | | | PWRC |
| 30 | JSCZ | Flexi-Van Leasing | | | RSRV |
| 31 | JSCZ | FLEXI-VAN LEASING, INC. | | | SCAC3 |
| 32 | JSCZ | FLEXI-VAN LEASING INC | | | SCAC4 |
