| 4301 | NOFP | NORTHERN FIBER PRODUCTS | | | SCAC3 |
| 4302 | NOFQ | NINE ZERO SIX ONE-SIX SEVEN ONE FIV | | | SCAC4 |
| 4303 | NOFR | NORTHWEST FREIGHT LINES INC | | | SCAC3 |
| 4304 | NOFS | NORDIC FOOD SERVICE INC | | | SCAC3 |
| 4305 | NOFT | NORTHERN FILM TRANSPORT, INC | | | SCAC3 |
| 4306 | NOFU | NORTH OIL AND FATS GMBH | | D | BIC |
| 4307 | NOFU | NODFOS | | | PWRC |
| 4308 | NOFU | Nodfos | | | RSRV |
| 4309 | NOFW | NORFOLK WAREHOUSE COMPANY INC | | | SCAC3 |
| 4310 | NOFW | NINE ONE THREE FOUR-EIGHT ONE TWO E | | | SCAC4 |
| 4311 | NOGA | Nogami Electric Railway | | J | TRAFFIC |
| 4312 | NOGC | New Orleans & Gulf Coast Ry. Co., Inc. | 7/2000-7/2005 | | NAKINA |
| 4313 | NOGC | New Orleans & Gulf Coast Ry. Co., Inc. | Jul-00 | | NRHS |
| 4314 | NOGC | NEW ORLEANS & GULF COAST RAILWAY CO. | | | PWRC |
| 4315 | NOGC | New Orleans and Gulf Coast Railway | | | RSRV |
| 4316 | NOGC | NEW ORLEANS & GULF COAST RAILWAY | | | SCAC4 |
| 4317 | NOGD | NEXTTEE OIL & GAS TRADING CO NIGERI | | | SCAC4 |
| 4318 | NOGE | Nogebus | | E | TRAFFIC |
| 4319 | NOGG | NOGGLE, ROBERT O & SONS | | | SCAC3 |
| 4320 | NOGI | NATIONAL OIL & GAS INC | | | SCAC4 |
| 4321 | NOGN | New Orleans Great Northern R.R. Co. (Gulf, Mobile and Northern R.R. Co.) | 7/1935-7/1936 | | NAKINA |
| 4322 | NOGN | New Orleans Great Northern R.R. Co. | 8/1920-7/1932 | | NAKINA |
| 4323 | NOGN | NEW ORLEANS GREAT NORTHERN RAILROAD CO. | | | PWRC |
| 4324 | NOGO | NORTH CAROLINA STATE PORTS AUTHORIT | | | SCAC3 |
| 4325 | NOGO | NINE ONE SIZ ZERO - ONE FOUR TWO SE | | | SCAC4 |
| 4326 | NOGP | NORTHERN GAS PRODUCTS COMPANY | | | SCAC3 |
| 4327 | NOGR | Nógrád Volán | | H | TRAFFIC |
| 4328 | NOGT | NORTHERN GAS TRANSPORT INC | | | SCAC3 |
| 4329 | NOGT | NORTHERN GAS TRANSPORT INC | | | SCAC4 |
| 4330 | NOGX | Chas. F. Noble Oil & Gas Co. | 7/1923 | | NAKINA |
| 4331 | NOGX | CHS. F. NOBLE OIL & GAS CO. | | | PWRC |
| 4332 | NOH | 32 (TR) Squadron, RAF Northolt | Callsign: Northolt, | GB | AVCODES |
| 4333 | NOH | No. 32 (The Royal) Squadron RAF | | | ICAO1 |
| 4334 | NOHA | NORTH ATLANTIC TRUCKING INC | | | SCAC3 |
| 4335 | NOHD | NORTH HEMPSTEAD TAXI INC | | | SCAC3 |
| 4336 | NOHD | NINE ONE SEVEN THREE - FIVE TWO ONE | | | SCAC4 |
| 4337 | NOHE | NORTHSHORE TRANSPORTATION CO INC | | | SCAC4 |
| 4338 | NOHL | NORTHERN HILLS INC TRUCKING | | | SCAC3 |
| 4339 | NOHL | NUGGET OILFIELD HAULING LTD | | | SCAC4 |
| 4340 | NOHM | NORTHERN OHIO MOVING & STORAGE INC | | | SCAC3 |
| 4341 | NOHN | NORTHERN TRUCK SERVICE | | | SCAC3 |
| 4342 | NOHO | NEW JERSEY FAST FREIGHT | | | SCAC3 |
| 4343 | NOHQ | NORTH HARLEM CARTAGE | | | SCAC3 |
| 4344 | NOHR | NORTHPOINT HAULING & RIGGING INC | | | SCAC3 |
| 4345 | NOHS | NORTHSIDE | | | SCAC3 |
| 4346 | NOHT | NORTH HAVEN TRANSPORTATION CO | | | SCAC3 |
| 4347 | NOHW | NORTHWEST TOWING | | | SCAC3 |
| 4348 | NOIB | NICS OIL INC | | | SCAC4 |
| 4349 | NOIC | NORTHERN INDUSTRIAL CARRIERS LIMITE | | | SCAC3 |
| 4350 | NOIC | NORTHERN INDUSTRIAL CARRIERS LIMITE | | | SCAC4 |
| 4351 | NOID | NARDONE OIL | | | SCAC4 |
| 4352 | NOIE | NORTH IOWA EXPRESS, INC | | | SCAC3 |
| 4353 | NOII | NORTHCO INDUSTRIES INC | | | SCAC3 |
| 4354 | NOIL | NORTHLAND INDUSTRIES LTD | | | SCAC3 |
| 4355 | NOIM | NOMEC INC | | | SCAC3 |
| 4356 | NOIN | NORTHERN INDIANA TRANSFER | | | SCAC3 |
| 4357 | NOIO | NORTHERN OIL I INC | | | SCAC4 |
| 4358 | NOIQ | NORTH STATE TRANSIT INC | | | SCAC3 |
| 4359 | NOIT | NORTHERN ILLINOIS TRANSIT, INC. | | | SCAC3 |
| 4360 | NOIT | NORTHERN ILLINOIS TRANSIT | | | SCAC4 |
| 4361 | NOIU | NOMA INFRASTRUCTURE PRIVATE LIMITED | | IND | BIC |
| 4362 | NOIU | BOC NOWSCO INTERNATIONAL | | | SCAC3 |
| 4363 | NOIU | BOC NOWSCO INTERNATIONAL | | | SCAC4 |
| 4364 | NOIW | NEWPORT ONE INC | | | SCAC4 |
| 4365 | NOIY | NICOLETTI OIL INC | | | SCAC4 |
| 4366 | NOJ | 2106701 Ontario Inc. t/a Novajet | Callsign: Novajet, | CDN | AVCODES |
| 4367 | NOJ | Nässjö - Oskarshamns Järnväg | 1870 - 1946 | S | svenska-lok.se |
| 4368 | NOJF | NORTH JERSEY TRANSFER | | | SCAC3 |
| 4369 | NOJM | NORTON, JAMES M | | | SCAC3 |
| 4370 | NOK | Sky Asia Co. Ltd. d/b/a Nok Air | IATA: DD, Name changed to Nok Airlines Co., Ltd. w.e.f. 18 January 2013 | T | AVCODES |
| 4371 | NOK | Nok Airlines Company Limited | IATA: DD, Callsign: Nok Air, Sky Asia Co. Ltd. d/b/a Nok Air w.e.f. 16 Janaury 2006. Name changed to Nok Airlines Public Co., Ltd. d/b/a Nok Air w.e.f. 18 January 2013. | T | AVCODES |
| 4372 | NOK | Nok Airlines Public Co., Ltd. d/b/a Nok Air | IATA: DD, Callsign: Nok Air, Filed for bankruptcy on 30 July 2020. Name changed from Nok Airlines Company Limited w.e.f. 18 January 2013 | T | AVCODES |
| 4373 | NOK | Nok Air | IATA: DD | | ICAO1 |
| 4374 | NOK | Nok Air | | T | TRAFFIC |
| 4375 | NOKC | NORTH OAK CHRYSLER-PLYMOUTH INC | | | SCAC3 |
| 4376 | NOKE | NEW ORLEANS TANKER CORPORATION | | | SCAC3 |
| 4377 | NOKI | NAPCO TRUCKING INC | | | SCAC4 |
| 4378 | NOKL | Northwestern Oklahoma R.R. Co. | 1/1975; added 1/1980; 1/1980-7/2005 | | NAKINA |
| 4379 | NOKL | Northwestern Oklahoma R.R. Co. | 1/75; added 1/80; 1/80-7/2000 | | NRHS |
| 4380 | NOKL | NORTHWESTERN OKLAHOMA RAILROAD CO. | | | PWRC |
| 4381 | NOKL | Northwestern Oklahoma Railroad | | | RSRV |
| 4382 | NOKL | NORTHWESTERN OKLAHOMA RAILROAD COMP | | | SCAC3 |
| 4383 | NOKL | NORTHWESTERN OKLAHOMA RAILROAD COMP | | | SCAC4 |
| 4384 | NOKL | Northwestern Oklahoma | | USA | TRAFFIC |
| 4385 | NOKR | NORTHWESTERN OKLAHOMA RAILROAD CO. | | | PWRC |
| 4386 | NOKR | Northwestern Oklahoma Railroad | | | RSRV |
| 4387 | NOKR | NORTHERN TRUCKING SERVICE | | | SCAC3 |
| 4388 | NOKS | NOAKES TRUCKING | | | SCAC3 |
| 4389 | NOKU | NAUKA LINES PTE LTD | | IND | BIC |
| 4390 | NOKZ | FIRST UNION RAIL | | | PWRC |
| 4391 | NOKZ | First Union Rail | | | RSRV |
| 4392 | NOKZ | FIRST UNION RAIL | | | SCAC4 |
| 4393 | NOL | National Overseas Airlines Company | Callsign: Nat Airline, | ET | AVCODES |
| 4394 | NOL | National Overseas Airlines Company | | | ICAO1 |
| 4395 | NOLA | NOLAN TRANSPORTATION LLC | | | SCAC4 |
| 4396 | NOLB | NOLET, BENOIT | | | SCAC3 |
| 4397 | NOLC | NORTHEASTERN LEASING CO | | | SCAC3 |
| 4398 | NOLC | NEIGHBORS OIL LLC | | | SCAC4 |
| 4399 | NOLD | NORTHLAND TRUCKING INC | | | SCAC4 |
| 4400 | NOLE | NORAN TRANSPORTATION INC | | | SCAC3 |
