| 2901 | JRTG | J RS TRUCKING INC | | | SCAC4 |
| 2902 | JRTI | JERRYS TRUCKING INC | | | SCAC4 |
| 2903 | JRTK | J & R TRUCKING | | | SCAC4 |
| 2904 | JRTN | J R T TRUCKING INC | | | SCAC4 |
| 2905 | JRTO | J | | | SCAC4 |
| 2906 | JRTP | JR TRANSPORTES | | | SCAC4 |
| 2907 | JRTT | Japan Railway Construction, Transport and Technology Agency | | J | TRAFFIC |
| 2908 | JRTX | Jap Rose Tank Line | 7/1923 | | NAKINA |
| 2909 | JRTX | James S. Kirk & Co. (Jap Rose Tank Line) | 8/1920 | | NAKINA |
| 2910 | JRTX | JAP ROSE TANK LINE [JAMES S. KIRK & CO.] | | | PWRC |
| 2911 | JRTY | J R TRUCKING | | | SCAC4 |
| 2912 | JRUG | J & R TRUCKING | | | SCAC4 |
| 2913 | JRUN | J-RUN INC | | | SCAC4 |
| 2914 | JRUS | JUMPS R US | | | SCAC4 |
| 2915 | JRUV | J RUVALS TRUCKING | | | SCAC4 |
| 2916 | JRUY | JOHNSON, RUSTY MASONRY INC | | | SCAC4 |
| 2917 | JRVA | JAMES RIVER TRAVEL AGENCY INC | | | SCAC4 |
| 2918 | JRVK | J R V TRUCKING | | | SCAC4 |
| 2919 | JRVP | JACKSON RV TRANSPORTERS INC | | | SCAC4 |
| 2920 | JRVS | JARVIS TRUCKING LTD | | | SCAC4 |
| 2921 | JRW | JR West | | J | TRAFFIC |
| 2922 | JRWC | Jamaica Railway Corporation | Real: JRC | JA | TRAFFIC |
| 2923 | JRWS | J R W TRUCKING INC | | | SCAC4 |
| 2924 | JRWX | Johnson Railway Service, Inc. | 7/2005 (not listed) | | NAKINA |
| 2925 | JRWX | John R. Walsh | 8/1920-7/1923 | | NAKINA |
| 2926 | JRWX | *JOHN R. WALSH | | | PWRC |
| 2927 | JRWX | +JOHNSON RAILWAY SERVICE, INC. | | | PWRC |
| 2928 | JRWX | Johnson Railway Service | | | RSRV |
| 2929 | JRWX | JOHNSON RAILWAY SERVICE INC | | | SCAC4 |
| 2930 | JRWY | J & R WELDING SUPPLY | | | SCAC4 |
| 2931 | JRX | Joseph Russell Realty Co. | 7/1937 (not listed) | | NAKINA |
| 2932 | JRX | JOSEPH RUSSELL REALTY CO. | | | PWRC |
| 2933 | JRXA | J R TRANS USA INC | | | SCAC4 |
| 2934 | JRXI | J & R EXPRESS INC | | | SCAC4 |
| 2935 | JRXL | JR TRANSPORT LLC | | | SCAC4 |
| 2936 | JRXN | J RAL TRANSPORTATION | | | SCAC4 |
| 2937 | JRXS | JR EXPRESS | | | SCAC4 |
| 2938 | JRY | Jet Ready | Callsign: Jet Ready, | E | AVCODES |
| 2939 | JRYC | JOLLY, RANDY TRUCKING CO | | | SCAC4 |
| 2940 | JRZE | JUAREZ, ED TRUCKING | | | SCAC4 |
| 2941 | JS | Air Koryo | ICAO: KOR, Callsign: Air Koryo, IATA Prefix: 120, Name changed from Chosonmihang CAA of DPR of Korea | PRK | AVCODES |
| 2942 | JS | Aeronaves del Sur, S.A. | | MEX | AVCODES |
| 2943 | JS | Chosonmihang CAA of DPR opf Korea | Callsign: Juliett Sierra, | PRK | AVCODES |
| 2944 | JS | Chosonmihang CAA of DPR of Korea | ICAO: CSM, Callsign: Juliett Sierra, ICAO designator changed to KCA | PRK | AVCODES |
| 2945 | JS | Chosonmihang CAA of DPR of Korea | ICAO: KCA, Callsign: Juliett Sierra, ICAO designator changed frm CSM | PRK | AVCODES |
| 2946 | JS | Chosonmihang CAA of DPR of Korea | ICAO: KCA, Callsign: Air Korea, Name changed to Air Koryo. ICAO designator changed frm CSM | PRK | AVCODES |
| 2947 | JSA | Jetstar Asia Airways Pte Ltd | IATA: 3K, Callsign: Jetstar Asia, IATA Prefix: 375, | SGP | AVCODES |
| 2948 | JSA | Jetstar Asia Airways | IATA: 3K | | ICAO1 |
| 2949 | JSA | Jetstar Asia Airways | | SGP | TRAFFIC |
| 2950 | JSAC | J & S TRANSPORT INC | | | SCAC4 |
| 2951 | JSAD | JOEL & SONS TRUCKING | | | SCAC4 |
| 2952 | JSAI | J & S ASSOCIATES INC | | | SCAC4 |
| 2953 | JSAL | JSA TERMINALS, INC | | | SCAC1 |
| 2954 | JSAM | JOHNSON STORAGE & MOVING CO LLC | | | SCAC4 |
| 2955 | JSAO | J S AND SONS | | | SCAC4 |
| 2956 | JSAP | JSA RUSH TRANSPORTATION SYSTEMS | | | SCAC1 |
| 2957 | JSAT | J & S TRUCKING | | | SCAC4 |
| 2958 | JSAV | JOHNSON STORAGE & MOVING CO (131) L | | | SCAC4 |
| 2959 | JSAY | J S AERO DELIVERY | | | SCAC4 |
| 2960 | JSBB | J & S BULK BROKERAGE INC | | | SCAC4 |
| 2961 | JSBC | JAMES TRANSPORTATION | | | SCAC4 |
| 2962 | JSBD | J S B TRUCKING | | | SCAC4 |
| 2963 | JSBF | JONES-STAATS TRANSPORTATION LLC | | | SCAC4 |
| 2964 | JSBI | J. S. B. TRUCKING, INC | | | SCAC1 |
| 2965 | JSBI | J AND S TRUCKING | | | SCAC4 |
| 2966 | JSBL | J & S BULK TRANSPORT CO INC | | | SCAC4 |
| 2967 | JSBX | Dairy Shippers Despatch Co. | added 4/1963; eliminated 1/1964 | | NAKINA |
| 2968 | JSBX | James S. Bent & Co., Inc. | 7/1935-7/1937 | | NAKINA |
| 2969 | JSBX | JAMES S. BENT & CO., IMC. | | | PWRC |
| 2970 | JSC | Airstan, Joint-Stock Aviation Company | Callsign: Airstan, | RUS | AVCODES |
| 2971 | JSC | Jetstream Aviation Congo | Callsign: Congo River, | RCB | AVCODES |
| 2972 | JSC | Johnstown and Stony Creek R.R. Co. | 1/1975-1/1980; eliminated 10/1983 | | NAKINA |
| 2973 | JSC | Johnstown and Stony Creek R.R. Co. | 1/75-1/80; eliminated 10/83 | | NRHS |
| 2974 | JSC | JOHNSTOWN & STONEY CREEK RAILROAD CO. | | | PWRC |
| 2975 | JSCA | JESSICA TRANSPORT SERVICES INC | | | SCAC4 |
| 2976 | JSCC | J S CARRIER CORP | | | SCAC4 |
| 2977 | JSCC | Jersey Shore Commuter Club | | USA | TRAFFIC |
| 2978 | JSCE | J S CARRIERS CORP | | | SCAC4 |
| 2979 | JSCF | JIT STEEL CORPORATION | | | SCAC4 |
| 2980 | JSCG | J & S CARTAGE INC | | | SCAC4 |
| 2981 | JSCH | JOES SEAFOOD CORP | | | SCAC4 |
| 2982 | JSCK | JONES, SCOTT KEITH | | | SCAC4 |
| 2983 | JSCM | JABERO SALES COMPANY | | | SCAC4 |
| 2984 | JSCO | J-STAR CONSOLIDATED INC | | | SCAC4 |
| 2985 | JSCQ | JSC RIMSCO | | | SCAC4 |
| 2986 | JSCR | JOHNSON & CURRIER TRUCKING CORPORAT | | | SCAC4 |
| 2987 | JSCS | JSC YUGREFTRANSFLOT | | | SCAC4 |
| 2988 | JSCT | J S C TRUCK LINES | | | SCAC4 |
| 2989 | JSCU | JAKE STORAGE CONTAINERS LLC | | USA | BIC |
| 2990 | JSCU | FLEXI-VAN LEASING, INC. | | | PWRC |
| 2991 | JSCU | Flexi-Van Leasing | | | RSRV |
| 2992 | JSCU | GENSTAR CONTAINER CORPORATION | | | SCAC4 |
| 2993 | JSCW | JACAMAR SHIPPING CO LTD | | | SCAC4 |
| 2994 | JSCX | Consumers Energy Co. | added 1/2007 | | NAKINA |
| 2995 | JSCX | CONSUMERS ENERGY CO. | | | PWRC |
| 2996 | JSCX | CONSUMERS ENERGY COMPANY | | | SCAC4 |
| 2997 | JSCY | JSC TERMINAL LLC | | | SCAC4 |
| 2998 | JSCZ | FLEXI-VAN LEASING, INC. | | | PWRC |
| 2999 | JSCZ | Flexi-Van Leasing | | | RSRV |
| 3000 | JSCZ | FLEXI-VAN LEASING, INC. | | | SCAC3 |
