| 1 | NT | Binter Canarias, S.A. | ICAO: IBB, | E | AVCODES |
| 2 | NT | Northair Aviation Ltd. | ICAO: NTL, Callsign: Northair, Merged into Knight Air during 1990 | GB | AVCODES |
| 3 | NT | Northern Air Taxis Ltd. | Callsign: Northair, Name changed to Northair Aviation Ltd. | GB | AVCODES |
| 4 | NT | Continental International Airways | | EAT | AVCODES |
| 5 | NT | NORFOLK TERMINAL | | | PWRC |
| 6 | NT | Nedtrain | | NL | VKM |
| 7 | NTA | Northern Thunderbird Air Ltd. | Callsign: Thunderbird, Designator 4R recalled by IATA | CDN | AVCODES |
| 8 | NTA | Northern Thunderbird Air Ltd. d/b/a N.T. Air | IATA: 4R, Callsign: Thunderbird, Designator 4R recalled by IATA | CDN | AVCODES |
| 9 | NTA | Northern Thunderbird Air | | | ICAO1 |
| 10 | NTAB | NITERIDER TECHNICAL LIGHTING SYSTEM | | | SCAC4 |
| 11 | NTAB | Nordiska Tåg AB | | SE | VKM |
| 12 | NTAC | NEW-TRONICS ANTENNA CORP | | | SCAC4 |
| 13 | NTAE | NOLAN TRANSPORTATION AGENCIES LTD | | | SCAC4 |
| 14 | NTAF | NORTHWESTERN TRANSPORTATION & FREIG | | | SCAC3 |
| 15 | NTAF | NORTH STAR SURFACES LLC | | | SCAC4 |
| 16 | NTAG | NICHOLSONS TRAVEL AGENCY | | | SCAC3 |
| 17 | NTAG | NE-TEX AG TRANSPORTATION INC | | | SCAC4 |
| 18 | NTAH | NTA LTD | | | SCAC3 |
| 19 | NTAJ | NAQEL TRANSPORT AND INVESTMENT BART | | | SCAC4 |
| 20 | NTAK | NARWAN TRUCKING INC | | | SCAC4 |
| 21 | NTAL | NETWORK AMERICA LINES, INC | | | SCAC4 |
| 22 | NTAN | NORTHSIDE TRANSPORTATION LLC | | | SCAC4 |
| 23 | NTAP | NORTHERN TRANSPORTATION CO INC | | | SCAC3 |
| 24 | NTAP | N T A TRANSPORT INC | | | SCAC4 |
| 25 | NTARG | Miejski Zakład Komunikacji w Nowym Targu | | PL | TRAFFIC |
| 26 | NTARI | Notari S.r.l. Construzioni Speciali | | I | TRAFFIC |
| 27 | NTARI | NOTARI S.R.L. | | IT | VKM |
| 28 | NTAS | NUSTART TRUCKING LLC | | | SCAC4 |
| 29 | NTAT | NATIONAL TRANSPORTATION INC | | | SCAC3 |
| 30 | NTAT | NENAD TRUCKING LLC | | | SCAC4 |
| 31 | NTAU | NT RENTAL APS | | DK | BIC |
| 32 | NTAY | NOTTOWAY TRANSPORT INC | | | SCAC4 |
| 33 | NTB | Servicios Aereos del Notre, S.A. de C.V. | Callsign: Servinorte, | MEX | AVCODES |
| 34 | NTB | Binter Cabo Verde | IATA: 3B, Callsign: Morabeza, Name changed to Transportes Interilhas de Cabo Verde, Sociedade Unipessoal, SA. TICV | CV | AVCODES |
| 35 | NTB | Transportes Interilhas de Cabo Verde, Sociedade Unipessoal, SA. TICV | IATA: 3B, Callsign: Morabeza, ICAO designator changed to BCV. ICAO callsign changed to Morabest. Name changed from Binter Cabo Verde | CV | AVCODES |
| 36 | NTB | Servicios Aereos Del Norte | | | ICAO1 |
| 37 | NTB | Nassauische Touristik Bahn e.V. | Wiesbaden | D | privat-bahn.de |
| 38 | NTB | NEWTON BUS SERVICE INC | | | SCAC4 |
| 39 | NTB | Nassauische Touristik-Bahn e.V | | DE | VKM |
| 40 | NTBA | NORTHWEST TRUCKLOAD SERVICE LTD | | | SCAC4 |
| 41 | NTBC | NORTHERN BOTTLING COMPANY OF MINOT | | | SCAC3 |
| 42 | NTBD | NEILS TRANSPORTATION SERVICE LIMITE | | | SCAC4 |
| 43 | NTBE | NICHES TRANSPORT INC | | | SCAC4 |
| 44 | NTBG | NORMITA TRUCKING | | | SCAC4 |
| 45 | NTBI | NATIONWIDE TRANSPORTATION BROKERS I | | | SCAC4 |
| 46 | NTBK | NATIONWIDE TRANSPORTATION BROKERS I | | | SCAC3 |
| 47 | NTBK | NORTHERN TIMBER TRUCKING INC | | | SCAC4 |
| 48 | NTBL | NTB LOGISTICS INC | | | SCAC4 |
| 49 | NTBQ | NATIONAL TRUCK BROKERAGE | | | SCAC3 |
| 50 | NTBT | NET TRUCK BROKERS | | | SCAC4 |
| 51 | NTC | Gibson Aviation | Callsign: Night Chase, | USA | AVCODES |
| 52 | NTC | Gibson Aviation | | | ICAO1 |
| 53 | NTC | NORTHERN TRANSIT CO. | | | PWRC |
| 54 | NTC | Northern Transit Co. | | USA | TRAFFIC |
| 55 | NTCB | NISON TRANSPORTATION CORPORATION | | | SCAC4 |
| 56 | NTCC | NELSON TRANS CO & COEUR DALENE MTR | | | SCAC3 |
| 57 | NTCC | NINE ONE TWO EIGHT-SIX NINE ZERO SI | | | SCAC4 |
| 58 | NTCD | NISSHIN TRANS CONSOLIDATOR CO LTD | | | SCAC4 |
| 59 | NTCF | NETCO FREIGHT SYSTEMS | | | SCAC3 |
| 60 | NTCF | NEWSOMS TRANSPORT CO INC | | | SCAC4 |
| 61 | NTCG | NTC LOGISTICS LLC | | | SCAC4 |
| 62 | NTCH | NAUTICAL HAULING INC | | | SCAC3 |
| 63 | NTCI | NEWPORT COACH INC | | | SCAC3 |
| 64 | NTCK | NEXTWAY TRUCKING COMPANY | | | SCAC4 |
| 65 | NTCL | NEXUS TRANSPORTATION LTD | | | SCAC3 |
| 66 | NTCO | NATIONAL TRANSIT COMPANY | | | SCAC3 |
| 67 | NTCP | NU-TRANS COMPANIES, INC | | | SCAC3 |
| 68 | NTCQ | NORMANDY TRANSPORT CO | | | SCAC4 |
| 69 | NTCR | NICMANDA TRUCKING INC | | | SCAC4 |
| 70 | NTCT | NATIONAL TRANSIT CORPORATION, THE | | | SCAC3 |
| 71 | NTCU | NINGBO T-TOWN CONTAINER TECHNOLOGY CO., LTD. | | PRC | BIC |
| 72 | NTCU | NORTHERN TRANSPORTATION COMPANY, LT | | | SCAC3 |
| 73 | NTCV | NATIONAL TRAILER CONVOY OF CANADA L | | | SCAC3 |
| 74 | NTCW | NTC | | | SCAC4 |
| 75 | NTCX | National Tank Car Co. | 7/1923-4/1938 | | NAKINA |
| 76 | NTCX | National Tank Car Co. (North American Car Co.) | 8/1920 | | NAKINA |
| 77 | NTCX | National Tank Car Co. | Apr-38 | | NRHS |
| 78 | NTCX | NATIONAL TANK CAR CO. (NORTH AMERICAN CAR CO.) | | | PWRC |
| 79 | NTCZ | NELLO TEER COMPANY | | | PWRC |
| 80 | NTD | Aero Norte, S.A. de C.V. | | MEX | AVCODES |
| 81 | NTD | Aero Norte | | | ICAO1 |
| 82 | NTDB | NATIONAL TRUCKING & DISTRIBUTION IN | | | SCAC3 |
| 83 | NTDK | NIKS TRANSPORTATION INC | | | SCAC4 |
| 84 | NTDL | NORTHERN CARTAGE (TRUCK LOAD DIV) | | | SCAC4 |
| 85 | NTDS | NATIONAL TRANSPORTATION & DISTRIBUT | | | SCAC3 |
| 86 | NTDV | NISADA TRADING SERVICES | | | SCAC4 |
| 87 | NTE | Interaire, S.A. de C.V. | Callsign: Intermex, | MEX | AVCODES |
| 88 | NTE | Interaire | | | ICAO1 |
| 89 | NTEC | NUTECH SERVICE INC | | | SCAC3 |
| 90 | NTEI | NINE TWO THREE EIGHT-SEVEN TWO FOUR | | | SCAC4 |
| 91 | NTEN | NATIONAL TRANSP[ORTATION ENTERPRIZE | | | SCAC3 |
| 92 | NTEP | NATRON EXPRESS INC | | | SCAC3 |
| 93 | NTEQ | NATES TRUCKING | | | SCAC3 |
| 94 | NTEQ | NORTHERN TIMBERLINE EQUIPMENT INC | | | SCAC4 |
| 95 | NTER | NIGHTTRAIN EXPRESS INC | | | SCAC4 |
| 96 | NTES | NORTHEASTERN TRANSIT INC | | | SCAC3 |
| 97 | NTES | NINE ONE ZERO FOUR-THREE SEVEN EIGH | | | SCAC4 |
| 98 | NTET | NATIONAL ELECTRONIC TRANSIT CORP | | | SCAC3 |
| 99 | NTET | NINE ONE TWO EIGHT-ZERO TWO ZERO SI | | | SCAC4 |
| 100 | NTEU | SINTECO SRL | | I | BIC |
