| 1 | NTF | Piper OK | Callsign: Netflight, Name changed to OK Business Aircraft | CZ | AVCODES |
| 2 | NTF | OK Business Aircraft | Callsign: Netflight, Name changed from Piper OK | CZ | AVCODES |
| 3 | NTFF | NATIONWIDE TRAFFIC SERVICE | | | SCAC3 |
| 4 | NTFI | NATIONAL FREIGHT INC | | | SCAC3 |
| 5 | NTFI | NORDAN TANKERS 4 INC | | | SCAC4 |
| 6 | NTFK | NOTT, FRANK H INC | | | SCAC3 |
| 7 | NTFM | NATIONAL TRAFFIC SYSTEMS | | | SCAC4 |
| 8 | NTFO | NOTTINGHAM TRANSFER CO | | | SCAC3 |
| 9 | NTFQ | NATIONAL TRANSFER & STORAGE | | | SCAC3 |
| 10 | NTFS | NU-TRANZ FREIGHT SYSTEMS INC | | | SCAC3 |
| 11 | NTFT | NORTH TEXAS FUEL TRANSPORTATION 1 L | | | SCAC4 |
