| 1301 | NCRA | NORTH COAST RELOCATION INC | | | SCAC4 |
| 1302 | NCRC | Nebraska Central R.R. Co. | 1/1994-7/2005 | | NAKINA |
| 1303 | NCRC | North Country R.R. Corp. | added 7/1980; eliminated 1/1982 | | NAKINA |
| 1304 | NCRC | North Country R.R. Corp. | added 7/80; eliminated 1/82 | | NRHS |
| 1305 | NCRC | Nebraska Central R.R. Co. | 1/94-7/2000 | | NRHS |
| 1306 | NCRC | *NORTH COUNTRY RAILROAD CORP. | | | PWRC |
| 1307 | NCRC | +NEBRASKA CENTRAL RAILROAD COMPANY | | | PWRC |
| 1308 | NCRC | Nebraska Central Railroad | | | RSRV |
| 1309 | NCRC | NEBRASKA CENTRAL RAILROAD | | | SCAC4 |
| 1310 | NCRC | Nebraska Central Railroad Company | | USA | TRAFFIC |
| 1311 | NCRD | NATIONAL CAR DELIVERY COMPANY | | | SCAC3 |
| 1312 | NCRG | NORSTAR CARGO SYSTEMS INC | | | SCAC4 |
| 1313 | NCRI | NOW COURIER OF RI INC | | | SCAC3 |
| 1314 | NCRL | NC RAILROAD INC. | | | PWRC |
| 1315 | NCRL | NU-CAR RELEASING CO LTD | | | SCAC3 |
| 1316 | NCRL | NC RAILROAD INC | | | SCAC4 |
| 1317 | NCRR | *NORTH COAST RAILROAD | | | PWRC |
| 1318 | NCRR | *NORTH CAROLINA RAILROAD | | | PWRC |
| 1319 | NCRR | North Carolina Railroad | | | RSRV |
| 1320 | NCRR | NORTH COAST RAILROAD | | | SCAC4 |
| 1321 | NCRS | N C R SERVICE | | | SCAC3 |
| 1322 | NCRS | NANCY EXPRESS INC | | | SCAC4 |
| 1323 | NCRU | NORTH AMERICAN CONTAINER SYSTEM (TIP INTERMODAL SERVICES [TRANSAMERICA LEASING)] | | | PWRC |
| 1324 | NCRU | TIP Intermodal Services | | | RSRV |
| 1325 | NCRW | NEW CAPITAL ROADWAYS LTD | | | SCAC4 |
| 1326 | NCRX | General Electric Rail Services Corp. | added 1/2000; 7/2000-7/2005 | | NAKINA |
| 1327 | NCRX | General Electric Railcar Services Corp. | added 1/1984; 1/1994; eliminated 1/2000 | | NAKINA |
| 1328 | NCRX | North American Car Corp. | added 1/1976; 1/1980; eliminated 1/1984 | | NAKINA |
| 1329 | NCRX | North American Car (Canada) Ltd. | added 7/1966; 4/1970-1/1975; eliminated 1/1976 | | NAKINA |
| 1330 | NCRX | North American Car (Canada) Ltd. | added 7/66; 4/70-1/75 | | NRHS |
| 1331 | NCRX | North American Car Corp. | Jan-80 | | NRHS |
| 1332 | NCRX | General Electric Railcar Services Corp. | 1/94; eliminated 1/2000 | | NRHS |
| 1333 | NCRX | General Electric Rail Services Corp. | added 1/2000; 7/2000 | | NRHS |
| 1334 | NCRX | *(NATX) GENERAL ELECTRIC RAIL SERVICES CORP. [NORTH AMERICAN CAR CORP.] | | | PWRC |
| 1335 | NCRX | *NORTH COAST RAILROAD | | | PWRC |
| 1336 | NCRX | GE Rail Services | | | RSRV |
| 1337 | NCRX | GENERAL ELECTRIC RAILCAR SERVICES C | | | SCAC4 |
| 1338 | NCRY | Northern Central Ry., Inc. | 7/2000 | | NAKINA |
| 1339 | NCRY | Northern Central Ry., Inc. | Jul-00 | | NRHS |
| 1340 | NCRY | NORTHERN CENTRAL RAILWAY | | | PWRC |
| 1341 | NCRY | Northern Central Railway | | | RSRV |
| 1342 | NCS | Simpson Air Ltd. | Callsign: Commuter Canada, | CDN | AVCODES |
| 1343 | NCS | Simpson Air Ltd. | IATA: 7B, Callsign: Commuter Canada, Designator recalled by IATA | CDN | AVCODES |
| 1344 | NCS | Simpson Air Ltd | | | ICAO1 |
| 1345 | NCS | NISEI CHARTER SERVICE | | | SCAC4 |
| 1346 | NCS | Dutch Central Railway Company | | NL | TRAFFIC |
| 1347 | NCS | Nuclear Cargo Servicse GmbH | | DE | VKM |
| 1348 | NCSC | NANSEMOND COLD STORAGE COMPANY | | | SCAC3 |
| 1349 | NCSD | NORTHCOAST SDD TRANSPORT INC | | | SCAC3 |
| 1350 | NCSD | NOVA CENTURY SCIENTIFIC INC | | | SCAC4 |
| 1351 | NCSE | NORCROSS SERVICE STATIONS INC | | | SCAC4 |
| 1352 | NCSF | NECO SEED FARMS INC | | | SCAC4 |
| 1353 | NCSG | NATIONAL COURIER SERVICE INC | | | SCAC4 |
| 1354 | NCSI | NCR ATM SERVICES INC | | | SCAC3 |
| 1355 | NCSI | NOBEL CARGO SYSTEMS INC | | | SCAC4 |
| 1356 | NCSK | NEW CARGO SERVICE INC | | | SCAC4 |
| 1357 | NCSL | NORTH COAST SALVAGE | | | SCAC3 |
| 1358 | NCSM | NATIONAL CARGO SYSTEMS LTD | | | SCAC4 |
| 1359 | NCSO | NASH, CHAS & SONS CORP | | | SCAC3 |
| 1360 | NCSO | NOR-CAL SEAFOOD INC | | | SCAC4 |
| 1361 | NCSP | NORTHWEST CARTAGE SPECIALISTS | | | SCAC3 |
| 1362 | NCSP | NEW CREATION SHIPPING INC | | | SCAC4 |
| 1363 | NCSQ | NORTHWEST CARTAGE SERVICE COMPANY I | | | SCAC3 |
| 1364 | NCSQ | NORTH COUNTIES SUPPLY CO INC | | | SCAC4 |
| 1365 | NCSR | NEW CARIBBEAN SERVICE RATE AGREEMEN | | | SCAC3 |
| 1366 | NCSTL | Nashville, Chattanooga and St. Louis | | USA | TRAFFIC |
| 1367 | NCSU | ORANO NCS GMBH | | D | BIC |
| 1368 | NCSU | NUCLEAR CARGO & SERVICE GMBH | | | SCAC4 |
| 1369 | NCSW | NEWPORT CARGO S A | | | SCAC4 |
| 1370 | NCSX | Nucor Steel Seattle Inc. | added 7/2008 | | NAKINA |
| 1371 | NCSX | NOVA Chemicals (USA) Inc. | eliminated 7/2000; 7/2000 (not listed) | | NAKINA |
| 1372 | NCSX | Merchants Despatch Transportation Corp. | added 7/1962; 7/1965-10/1966; eliminated 7/1967 | | NAKINA |
| 1373 | NCSX | Northern Refrigerator Line, Inc. | added 7/1961; eliminated 7/1962 | | NAKINA |
| 1374 | NCSX | National Car Repair Shops, Inc. | eliminated 1/1954 | | NAKINA |
| 1375 | NCSX | Merchants Despatch Transportation Corp. | 7/65-10/66; eliminated 7/67 | | NRHS |
| 1376 | NCSX | NOVA Chemicals (USA) Inc. | 7/2000; eliminated 7/2000 | | NRHS |
| 1377 | NCSX | *NATIONAL CAR REPAIR SHOPS, INC. | | | PWRC |
| 1378 | NCSX | *MERCHANTS DESPATCH TRANSPORTATION CORP. [NORTHERN REFRIGERATOR LINE, INC.] | | | PWRC |
| 1379 | NCSX | *NOVA CHEMICALS (USA), INC. | | | PWRC |
| 1380 | NCSX | +NUCOR STEEL SEATTLE INC. | | | PWRC |
| 1381 | NCSX | NUCOR STEEL SEATTLE INC | | | SCAC4 |
| 1382 | NCSY | NORTH COAST SUPPLY | | | SCAC4 |
| 1383 | NCT | Pete Air Co., Ltd. | IATA: XW, Callsign: Pete Air, Name changed to Nokscoot | T | AVCODES |
| 1384 | NCT | NokScoot Airlines Company Limited | IATA: XW, Callsign: Big Bird, IATA Prefix: 478, Founded on 20 August 2014. Commenced operations on 20 May 2015. Ceased operations on 26 June 2020. NokScoot is a joint venture of Thailand's Nok Air and Singapore based Scoot. | T | AVCODES |
| 1385 | NCT | NORTH CHARLESTON TERMINAL COMPANY | | | PWRC |
| 1386 | NCT | NORTHEAST CHARTER AND TOUR INC | | | SCAC4 |
| 1387 | NCTA | NEW CENTURY TRANSPORTATION INC | | | SCAC4 |
| 1388 | NCTC | N/C TRUCKING COMPANY | | | SCAC3 |
| 1389 | NCTC | NET CYCLE TRADING CORP | | | SCAC4 |
| 1390 | NCTD | NESTEBY, CHUCK TRUCKING INC | | | SCAC3 |
| 1391 | NCTD | NORTH AMERICAN TRADING | | | SCAC4 |
| 1392 | NCTD | North County Transit District (San Diego) | | US-CA | TRAFFIC |
| 1393 | NCTF | NEW CAPITAL TRANSPORT LTD | | | SCAC4 |
| 1394 | NCTG | NEW CENTURY AG | | | SCAC4 |
| 1395 | NCTH | NORTH CENTRAL TRANSPORT INC | | | SCAC3 |
| 1396 | NCTH | NOVACAM TECHNOLOGIES INC | | | SCAC4 |
| 1397 | NCTI | N C TRANSPORT INC | | | SCAC3 |
| 1398 | NCTI | NEW COUNTRY TRANSPORT INC | | | SCAC4 |
| 1399 | NCTJ | NEW CREATION TRANSPORT INC | | | SCAC4 |
| 1400 | NCTK | NATIONAL CONTAINER LINE (HK) LTD | | | SCAC4 |
