| 1 | J | Japan | J | TRAFFIC | |
| 2 | J&P | (The) Joplin-Pittsburg R.R. (Co.) | 7/1930-4/1938 | NAKINA | |
| 3 | J&P | The Joplin-Pittsburg Ry. Co. | 7/1923 | NAKINA | |
| 4 | J&P | Joplin-Pittsburg R.R. | Apr-38 | NRHS | |
| 5 | J&P | JOPLIN-PITTSBURG RWY. CO. | PWRC | ||
| 6 | J&SC | Johnstown & Stony Creek R.R. (Co.) | 7/1923-4/1938 | NAKINA | |
| 7 | J&SC | Johnstown & Stony Creek R.R. | Apr-38 | NRHS | |
| 8 | J&SC | JOHNSTOWN & STONET CREEK RAILROAD | PWRC | ||
| 9 | JA | Japanese Army | J | TRAFFIC | |
| 10 | JAA | Japan Asia Airways | IATA: EG | ICAO1 | |
| 11 | JAA | Japan Asia Airways | J | TRAFFIC | |
| 12 | JAAC | JAMES MOVERS & STORAGE INC | SCAC4 | ||
| 13 | JAAD | J & A TRANSPORTATION LLC | SCAC4 | ||
| 14 | JAAJ | Järnvägssällskapet Åmål-Årjängs Järnväg | SE | VKM | |
| 15 | JAAL | JADE SKY LOGISTICS CORP | SCAC4 | ||
| 16 | JAAN | J A A R LLC | SCAC4 | ||
| 17 | JAAO | JUAREZ ALVARADO, ALFREDO | SCAC4 | ||
| 18 | JAAQ | JAAT TRANSPORT INC | SCAC4 | ||
| 19 | JAAR | JAMES GLOBAL LOGISTICS INC | SCAC4 | ||
| 20 | JAAT | JetAsia Airways | Real: JAA | T | TRAFFIC |
| 21 | JAAU | JORDAN BROMINE COMPANY | PWRC | ||
| 22 | JAAU | Jordan Bromine | RSRV | ||
| 23 | JAAU | JORDAN BROMINE COMPANY LIMITED | SCAC4 | ||
| 24 | JAB | Air Bagan | IATA: W9 | ICAO1 | |
| 25 | JABB | JOHAL NATIONAL INC | SCAC4 | ||
| 26 | JABC | J A B LOGISTICS INC | SCAC4 | ||
| 27 | JABE | JAMES CARTAGE CO INC | SCAC4 | ||
| 28 | JABH | JA-LYN FARMS LTD | SCAC4 | ||
| 29 | JABL | JACKSON TRANSPORTATION SERVICES INC | SCAC4 | ||
| 30 | JABM | J&B MURPHY TRUCKING, INC | SCAC1 | ||
| 31 | JABO | JAMERSON BROTHERS TRUCKING COMPANY | SCAC4 | ||
| 32 | JABP | JABEZ EXPEDITING & LOGISTICS CO | SCAC4 | ||
| 33 | JABQ | JAGRUP ENTERPRISES LTD | SCAC4 | ||
| 34 | JABR | J A B TRUCKING | SCAC4 | ||
| 35 | JAC | Japan Air Commuter | ICAO1 | ||
| 36 | JACC | JACKSON CARTAGE CO | SCAC1 | ||
| 37 | JACEK | PPHU Jacek Surdyk | PL | VKM | |
| 38 | JACF | J A C 'S EXPRESS LIMITED LIABILITY | SCAC4 | ||
| 39 | JACH | JAC | SCAC4 | ||
| 40 | JACI | JACINTO TRANSPORT | SCAC4 | ||
| 41 | JACJ | JTI TRANSPORTATION INC | SCAC4 | ||
| 42 | JACL | JACQUIN, CHARLES ET CIE INC | SCAC4 | ||
| 43 | JACN | JACOBSON TRANSPORT INC | SCAC4 | ||
| 44 | JACO | JACKSON, H L & SON | SCAC4 | ||
| 45 | JACS | JACKS TRUCKING LLC | SCAC4 | ||
| 46 | JACT | J A C TRUCKING LLC | SCAC4 | ||
| 47 | JACV | JACKSON OIL AND SOLVENTS INC | SCAC4 | ||
| 48 | JACW | JACOBSON, W TRUCKING | SCAC4 | ||
| 49 | JACX | Johnstown America Corp. | added 7/1992; 1/1994-7/2005 | NAKINA | |
| 50 | JACX | Johnstown America Corp. | added 7/92; 1/94-7/2000 | NRHS | |
| 51 | JACX | JOHNSTOWN AMERICA CORPORATION | PWRC | ||
| 52 | JACX | Johnstown America Corporation | RSRV | ||
| 53 | JACX | JOHNSTOWN AMERICA CORPORATION | SCAC4 | ||
| 54 | JACY | JASON MARITIME INC | SCAC4 | ||
| 55 | JAD | Aerojal | ICAO1 | ||
| 56 | JADD | JAMED DE MEXICO SA DE CV | SCAC4 | ||
| 57 | JADE | JADE LINE HOLDINGS LTD | SCAC4 | ||
| 58 | JADF | JADE EXPRESS INC | SCAC4 | ||
| 59 | JADN | JADEN 2005 LIMITED | SCAC4 | ||
| 60 | JADP | J A D POWER TRANSPORT INC | SCAC4 | ||
| 61 | JADR | J A D E TRUCKING INC | SCAC4 | ||
| 62 | JADT | J A D TRANSPORT CORP | SCAC4 | ||
| 63 | JADV | JADE TRANSPORTATION SERVICES | SCAC4 | ||
| 64 | JADX | Hellerworx, Inc. | 7/2005 (not listed) | NAKINA | |
| 65 | JADX | HELLERWORX, INC. | PWRC | ||
| 66 | JADX | HELLERWORX INC | SCAC4 | ||
| 67 | JAE | Jade Cargo International | ICAO1 | ||
| 68 | JAE | Jade Cargo International | PRC | TRAFFIC | |
| 69 | JAEB | JASON EXPRESS, INC | SCAC1 | ||
| 70 | JAEB | JASON EXPRESS INC | SCAC4 | ||
| 71 | JAEF | JAE FOREST LOGGING LLC. | SCAC4 | ||
| 72 | JAEG | JAMISON ENERGY | SCAC4 | ||
| 73 | JAEK | JAEKEL, GEO INC | SCAC4 | ||
| 74 | JAEW | JAEGLE, WILLIAM J | SCAC4 | ||
| 75 | JAEY | JAELYN CORPORATION | SCAC4 | ||
| 76 | JAF | Jetairfly | IATA: JF | ICAO1 | |
| 77 | JAFD | JOES AIB FREIGHT PICKUP & | SCAC4 | ||
| 78 | JAFE | JAFETT SHIPPING INC | SCAC4 | ||
| 79 | JAFG | J & A FREIGHT SYSTEMS INC | SCAC4 | ||
| 80 | JAFI | J A FRATE INC | SCAC4 | ||
| 81 | JAFN | JAF (DIV OF TFI TRANSPORT 3) | SCAC4 | ||
| 82 | JAFR | JAGUAR FREIGHT SERVICES | SCAC4 | ||
| 83 | JAFX | J.A. LaFortune | 7/1930-4/1947 | NAKINA | |
| 84 | JAFX | J.A. LaFortune | Apr-38 | NRHS | |
| 85 | JAFX | J.A. LAFORTUNE | PWRC | ||
| 86 | JAG | Jetalliance | ICAO1 | ||
| 87 | JAGB | J A G TRANSPORTATION | SCAC4 | ||
| 88 | JAGC | JAG FUELS COMPANY INC | SCAC4 | ||
| 89 | JAGF | J A G FREIGHT SYSTEMS LLC | SCAC4 | ||
| 90 | JAGH | JAG LOGISTICS LLC | SCAC4 | ||
| 91 | JAGJ | JAG TRANSPORT INC | SCAC4 | ||
| 92 | JAGM | JAGUAR MFG | SCAC4 | ||
| 93 | JAGR | JAG TRUCKING INC | SCAC4 | ||
| 94 | JAGX | J.A. Garfield | added 7/1953; 7/1954-10/1966; eliminated 7/1967 | NAKINA | |
| 95 | JAGX | J.A. Garfield | 10/57-10/66; eliminated 7/67 | NRHS | |
| 96 | JAGX | J.A. GARFIELD | PWRC | ||
| 97 | JAGY | J A GARVEY TRANSPTN INC | PWRC | ||
| 98 | JAHG | J & A HOLDINGS LLP | SCAC4 | ||
| 99 | JAHI | J AND H LOGISTICS INC | SCAC4 | ||
| 100 | JAHL | JAHN TRANSFER, INC | SCAC1 |