| 1 | NTP | Nistransair | Callsign: Nistransair, | MD | AVCODES |
| 2 | NTP | NITROPOROS SRL | | RO | VKM |
| 3 | NTPB | NATIONAL TRANSPORTATION BROKERS INC | | | SCAC3 |
| 4 | NTPC | NATIONAL TRANSPORTATION CORP | | | SCAC3 |
| 5 | NTPD | NATIONAL TRANSPORTATION DISTRIBUTIO | | | SCAC3 |
| 6 | NTPE | NATIVE PRIDE | | | SCAC4 |
| 7 | NTPL | NORMAN TRANSPORTATION LINES INC | | | SCAC3 |
| 8 | NTPL | NT SPECIALTIES | | | SCAC4 |
| 9 | NTPO | NATIONAL TRANSPORT INC | | | SCAC4 |
| 10 | NTPQ | NOEL TRANSFER & PACKAGE DELIVERY SE | | | SCAC3 |
| 11 | NTPR | NORTHSTATE PROPANE | | | SCAC3 |
| 12 | NTPT | NELSON, T P TRUCKING | | | SCAC3 |
