| 1 | NTA | Northern Thunderbird Air Ltd. | Callsign: Thunderbird, Designator 4R recalled by IATA | CDN | AVCODES |
| 2 | NTA | Northern Thunderbird Air Ltd. d/b/a N.T. Air | IATA: 4R, Callsign: Thunderbird, Designator 4R recalled by IATA | CDN | AVCODES |
| 3 | NTA | Northern Thunderbird Air | | | ICAO1 |
| 4 | NTAB | NITERIDER TECHNICAL LIGHTING SYSTEM | | | SCAC4 |
| 5 | NTAB | Nordiska Tåg AB | | SE | VKM |
| 6 | NTAC | NEW-TRONICS ANTENNA CORP | | | SCAC4 |
| 7 | NTAE | NOLAN TRANSPORTATION AGENCIES LTD | | | SCAC4 |
| 8 | NTAF | NORTHWESTERN TRANSPORTATION & FREIG | | | SCAC3 |
| 9 | NTAF | NORTH STAR SURFACES LLC | | | SCAC4 |
| 10 | NTAG | NICHOLSONS TRAVEL AGENCY | | | SCAC3 |
| 11 | NTAG | NE-TEX AG TRANSPORTATION INC | | | SCAC4 |
| 12 | NTAH | NTA LTD | | | SCAC3 |
| 13 | NTAJ | NAQEL TRANSPORT AND INVESTMENT BART | | | SCAC4 |
| 14 | NTAK | NARWAN TRUCKING INC | | | SCAC4 |
| 15 | NTAL | NETWORK AMERICA LINES, INC | | | SCAC4 |
| 16 | NTAN | NORTHSIDE TRANSPORTATION LLC | | | SCAC4 |
| 17 | NTAP | NORTHERN TRANSPORTATION CO INC | | | SCAC3 |
| 18 | NTAP | N T A TRANSPORT INC | | | SCAC4 |
| 19 | NTARG | Miejski Zakład Komunikacji w Nowym Targu | | PL | TRAFFIC |
| 20 | NTARI | Notari S.r.l. Construzioni Speciali | | I | TRAFFIC |
| 21 | NTARI | NOTARI S.R.L. | | IT | VKM |
| 22 | NTAS | NUSTART TRUCKING LLC | | | SCAC4 |
| 23 | NTAT | NATIONAL TRANSPORTATION INC | | | SCAC3 |
| 24 | NTAT | NENAD TRUCKING LLC | | | SCAC4 |
| 25 | NTAU | NT RENTAL APS | | DK | BIC |
| 26 | NTAY | NOTTOWAY TRANSPORT INC | | | SCAC4 |
