| 1 | JTN | Jettrain Corporation | Callsign: Jettrain, Ceased operations 1997 | USA | AVCODES |
| 2 | JTN | Jet Test and Transport, LLC | Callsign: Jet Test, Name changed to Jet Test International, LLC | USA | AVCODES |
| 3 | JTN | Jet Test International, LLC | Callsign: Jet Test, Name changed from Jet Test and Transport, LLC. | USA | AVCODES |
| 4 | JTN | Jettrain Corporation | | | ICAO1 |
| 5 | JTNI | J TRANS INCORPORATED | | | SCAC4 |
| 6 | JTNL | J TRAN LLC | | | SCAC4 |
| 7 | JTNO | ILLINOIS REFRIGERATED TRUCKING SERV | | | SCAC4 |
| 8 | JTNP | JAR TRANSNATIONAL TRANSPORT | | | SCAC4 |
| 9 | JTNR | J TRANSPORT | | | SCAC4 |
| 10 | JTNS | JOTRAN SYSTEMS LTD | | | SCAC4 |
| 11 | JTNT | J & A TRANSPORT | | | SCAC4 |
