| 1 | NTX | Northern Air Service, Inc. | Callsign: Nortax, Name changed to Northern Jet Management, Inc. | USA | AVCODES |
| 2 | NTX | Northern Jet Management, Inc. | Callsign: Nortax, Name changed from Northern Air Service, Inc. | USA | AVCODES |
| 3 | NTX | AK-Air Georgia, LLC | Callsign: Tiflis, | GE | AVCODES |
| 4 | NTX | Northern Jet Management | | | ICAO1 |
| 5 | NTX | National Tube Co. | 8/1920-4/1938 | | NAKINA |
| 6 | NTX | National Tube Co. | Apr-38 | | NRHS |
| 7 | NTX | NATIONAL TUBE CO. | | | PWRC |
| 8 | NTXA | NORTH TEXAS CARRIER CORP | | | SCAC4 |
| 9 | NTXG | NATOS TRANSPORT | | | SCAC4 |
| 10 | NTXI | NEWBERRY TAXI CO | | | SCAC3 |
| 11 | NTXI | NETWORK XPRESS INC | | | SCAC4 |
| 12 | NTXL | NORTH TEXAS LINES INC | | | SCAC3 |
| 13 | NTXL | NP TRANSPORT LLC | | | SCAC4 |
| 14 | NTXM | NELLIE TRANSPORT | | | SCAC4 |
| 15 | NTXO | NEES TRANSPORT LLC | | | SCAC4 |
| 16 | NTXP | NORTHERN TEX-PACK EXPRESS INC | | | SCAC3 |
| 17 | NTXP | NAVIGATOR TRUCKING EXPRESS CORP | | | SCAC4 |
| 18 | NTXR | NEBRASKA-TEXAS TRANSPORTATION INC | | | SCAC4 |
| 19 | NTXY | NEUMAN TRANSPORT INC | | | SCAC4 |
