| 1 | NW | Northwest Airlines, Inc. | ICAO: NWA, Callsign: Northwest, IATA Prefix: 012, Merged into Delta Air Lines DL/DAL | USA | AVCODES |
| 2 | NW | Northwest Orient Airlines, Inc. | ICAO: NWA, Callsign: Northwest, IATA Prefix: 012, Name change to Northwest Airlines | USA | AVCODES |
| 3 | NW | Norfolk Southern Ry. Co. (Norfolk Southern) | 7/2005 | | NAKINA |
| 4 | NW | Norfolk Southern Ry. Co. | added 1/1991; 1/1994-7/2000 | | NAKINA |
| 5 | NW | Norfolk and Western Ry. | eliminated 1/1991 | | NAKINA |
| 6 | NW | Norfolk and Western Ry. Co. (N&W Dist.) | 1/1975-1/1980 | | NAKINA |
| 7 | NW | Norfolk and Western Ry. Co. (N&W Dist.) | 1/75-1/80 | | NRHS |
| 8 | NW | Norfolk and Western Ry. | eliminated 1/91 | | NRHS |
| 9 | NW | Norfolk Southern Ry. Co. | added 1/91; 1/94-7/2000 | | NRHS |
| 10 | NW | NORFOLK SOUTHERN RAILWAY COMPANY [NORFOLK & WESTERN RY] | | | PWRC |
| 11 | NW | Norfolk and Western Railway (Norfolk Southern) | | | RSRV |
| 12 | NW | NORFOLK AND WESTERN RAILWAY | | | SCAC4 |
| 13 | NW | Norfolk and Western | | USA | TRAFFIC |
| 14 | NW&B | New York, Westchester & Boston Ry. Co. | 7/1923-7/1936 | | NAKINA |
| 15 | NW&B | NEW YORK, WINCHESTER & BOSTON RWY. CO. | | | PWRC |
| 16 | NWA | Northwest Airlines, Inc. | IATA: NW, Callsign: Northwest, IATA Prefix: 012, Merged into Delta Air Lines DL/DAL | USA | AVCODES |
| 17 | NWA | Northwest Orient Airlines, Inc. | IATA: NW, Callsign: Northwest, IATA Prefix: 012, Name change to Northwest Airlines | USA | AVCODES |
| 18 | NWA | Northwest Airlines | IATA: NW | | ICAO1 |
| 19 | NWA | | | | TRAFFIC |
| 20 | NWAB | NWA TRANSPORTATION | | | SCAC4 |
| 21 | NWAE | NORTHWEST ARKANSAS TRUCK AND EQUIPM | | | SCAC3 |
| 22 | NWAG | NORTHWEST AGRIGULTURAL COOPERATIVE | | | SCAC3 |
| 23 | NWAI | NICKELS BOAT WORKS INC | | | SCAC4 |
| 24 | NWAJ | NU-WAY TRANSPORTATION SERVICE INC | | | SCAC3 |
| 25 | NWAK | NEW-ARK TRUCKING INC | | | SCAC3 |
| 26 | NWAK | NORTHWEST FORWARDERS INC | | | SCAC4 |
| 27 | NWAM | NOW AMERICA | | | SCAC3 |
| 28 | NWAM | NINE ONE FIVE TWO-ZERO ZERO TWO THR | | | SCAC4 |
| 29 | NWAP | NORTHWEST ARKANSAS TRANSPORTATION I | | | SCAC3 |
| 30 | NWAP | NEWELL TRANSPORTATION LLC | | | SCAC4 |
| 31 | NWAS | NEWTON & SONS, INC | | | SCAC3 |
| 32 | NWAW | NORTHWEST AIRLINES (AGENT AIT WORLD | | | SCAC4 |
| 33 | NWAX | BP Global Special Products (America) Inc. | added 1/2002; eliminated 1/2004; 7/2005 (not listed) | | NAKINA |
| 34 | NWAX | Dussek Campbell, Inc. | added 7/2000; 7/2000; eliminated 1/2002 | | NAKINA |
| 35 | NWAX | National Wax Co. | added 4/1962; 7/1965-1/1994; eliminated 7/2000 | | NAKINA |
| 36 | NWAX | National Wax Co. | added 4/62; 7/65-1/94; eliminated 7/2000 | | NRHS |
| 37 | NWAX | Dussek Campbell, Inc. | added 7/2000; 7/2000 | | NRHS |
| 38 | NWAX | BP GLOBAL SPECIAL PRODUCTS (AMERICA), INC. [DUSSEK CAMPBELL, INC.; NATIONAL WAX COMPANY] | | | PWRC |
| 39 | NWAX | National Wax (BP Global Special Products) | | | RSRV |
| 40 | NWAX | NATIONAL WAX CO | | | SCAC3 |
| 41 | NWAY | NEWAY-LOVE DISTRIBUTION INC | | | SCAC3 |
| 42 | NWB | Nigeria Air | Callsign: Nigeria Air, Planned start-up of new National Carrier. | WAN | AVCODES |
| 43 | NWB | NordWestBahn GmbH | Osnabrück (Connex-Gruppe > Veolia Verkehr) | D | privat-bahn.de |
| 44 | NWB | Nordwest-Bahn | | D | TRAFFIC |
| 45 | NWB | NordWestBahn | | DE | VKM |
| 46 | NWBE | NATIONWIDE BROKERAGE | | | SCAC3 |
| 47 | NWBG | NATIONWIDE BROKERAGE INC | | | SCAC3 |
| 48 | NWBL | N W BOTTLING CO | | | SCAC3 |
| 49 | NWBQ | NEW BOSTON TRACTOR & EQUIPMENT SALE | | | SCAC3 |
| 50 | NWBQ | NEWALTA CORPORATION | | | SCAC4 |
| 51 | NWBR | NELSON-WESTERBERG, INC | | | SCAC3 |
| 52 | NWBR | NELSON-WESTERBE | | | SCAC4 |
| 53 | NWBS | N & W BROKERAGE SERVICE | | | SCAC3 |
| 54 | NWBU | NIJHOF WASSINK B.V. | | NL | BIC |
| 55 | NWBU | NIJHOF-WASSINK B V | | | SCAC4 |
| 56 | NWC | New ACS Ltd. | Callsign: Newflight, | EAT | AVCODES |
| 57 | NWC | Aircompany North-West LLC | IATA: 0E, Callsign: West Way, | RUS | AVCODES |
| 58 | NWC | NordWestCargo GmbH | Osnabrück (Connex-Gruppe > Veolia Verkehr) | D | privat-bahn.de |
| 59 | NWC | NordWestCargo GmbH | | DE | VKM |
| 60 | NWCA | NEW BRIDGE LOGISTICS INC | | | SCAC4 |
| 61 | NWCB | NEWCOMBS FUEL OIL SERVICE | | | SCAC4 |
| 62 | NWCC | NORTHWEST CONTRACT CARRIERS INC | | | SCAC3 |
| 63 | NWCD | NETWORK COMMUNICATIONS INC | | | SCAC4 |
| 64 | NWCE | NEW CENTURY TRANSPORT LLC | | | SCAC4 |
| 65 | NWCF | NORTH/WEST CONNECTION INC | | | SCAC3 |
| 66 | NWCF | NATIONWIDE TRANSPORTATION SERVICES | | | SCAC4 |
| 67 | NWCG | NOAHS WAREHOUSE & CARTAGE INC | | | SCAC3 |
| 68 | NWCG | NORTHWEST CASTING SERVICE INC | | | SCAC4 |
| 69 | NWCH | NORWICH TRANSPORTATION | | | SCAC4 |
| 70 | NWCI | NATIONWIDE CARTAGE SERVICE INC | | | SCAC3 |
| 71 | NWCJ | NEW CONCEPT LOGISTICS LLC | | | SCAC4 |
| 72 | NWCM | NEWCOMER TRUCKING INC | | | SCAC3 |
| 73 | NWCM | NEWCOMER TRUCKING | | | SCAC4 |
| 74 | NWCN | NORTHWEST CONSOLIDATORS INC | | | SCAC3 |
| 75 | NWCO | NORTHWEST CONTAINER EXPRESS INC | | | SCAC3 |
| 76 | NWCP | NEW WASTE CONCEPTS INC | | | SCAC4 |
| 77 | NWCQ | NEW-WAY CARTAGE INC | | | SCAC4 |
| 78 | NWCS | NEW CENTURY SEACARRIERS LTD | | | SCAC4 |
| 79 | NWCT | NORTHWEST CONTAINERS | | | SCAC3 |
| 80 | NWCU | NORTHWEST CONTAINER SERVICE | | USA | BIC |
| 81 | NWCU | NORTHWEST CONTAINER SERVICES INC | | | SCAC4 |
| 82 | NWCV | NORTHWEST CONTAINER SERVICES INC | | | SCAC3 |
| 83 | NWCV | NORTHWEST CONTAINER SERVICES INC | | | SCAC4 |
| 84 | NWCX | Northwest Container Services, Inc. | added 4/1998; 7/2000-7/2005 | | NAKINA |
| 85 | NWCX | Norwich Chemical Co. | 7/1935-7/1937 | | NAKINA |
| 86 | NWCX | Northwest Container Services, Inc. | added 4/98; 7/2000 | | NRHS |
| 87 | NWCX | *NORWICH CHEMICAL CO. | | | PWRC |
| 88 | NWCX | +NORTHWEST CONTAINER SERVICES INC. | | | PWRC |
| 89 | NWCX | Northwest Container Services | | | RSRV |
| 90 | NWCX | NORTHWEST CONTAINER SERVICES INC | | | SCAC4 |
| 91 | NWD | Northwest Air Services Limited | Callsign: Northwest Service, | WAN | AVCODES |
| 92 | NWD | New World Jet Corporation | Callsign: New World, | USA | AVCODES |
| 93 | NWD | New World Jet Corporation | | | ICAO1 |
| 94 | NWDA | NORTHWEST DAIRY FORWARDING COMPANY | | | SCAC4 |
| 95 | NWDB | NEW ADOM BAKERY INC | | | SCAC4 |
| 96 | NWDC | NORTHWEST DRAYAGE COMPANY | | | SCAC3 |
| 97 | NWDD | NATIONWIDE DISTRIBUTORS INC | | | SCAC3 |
| 98 | NWDE | NATIONWIDE EXPRESS INC | | | SCAC4 |
| 99 | NWDG | NORWOOD TRUCKING | | | SCAC4 |
| 100 | NWDH | NEW WORLD VAN LINES OF DALLAS | | | SCAC4 |
