| 1 | NB | Sterling European Kommanditaktieselskab | ICAO: SNB, Callsign: Sterling, IATA Prefix: 373, Name changed to Sterling Airlines A/S. Formerly Sterling Airlines A/S | DK | AVCODES |
| 2 | NB | Sterling Airlines A/S | ICAO: SAW, Callsign: Sterling, | DK | AVCODES |
| 3 | NB | Sterling Airways Ltd. | ICAO: SAW, Callsign: Sterling, | DK | AVCODES |
| 4 | NB | Sterling Airlines A/S | ICAO: SNB, Callsign: Sterling, IATA Prefix: 373, Ceased operations on 29 October 2008. Name changed from Sterling European Kommanditaktieselskab. Formerly Sterling Airlines A/S | DK | AVCODES |
| 5 | NB | Skypower Express Airways Nigeria Ltd. | | WAN | AVCODES |
| 6 | NB | Berniq Airways | ICAO: BNL, Callsign: Manara, | LAR | AVCODES |
| 7 | NB | Consolidated Rail Corp. | added 7/1980; eliminated 7/1999 | | NAKINA |
| 8 | NB | Northampton and Bath R.R. Co. | 1/1946-10/1966 & 1/1975; eliminated 4/1979 | | NAKINA |
| 9 | NB | Northampton and Bath R.R. Co. | 1/52-10/66 & 1/75; eliminated 4/79 | | NRHS |
| 10 | NB | Consolidated Rail Corp. | added 7/80; eliminated 7/99 | | NRHS |
| 11 | NB | NiedersachsenBahn GmbH & Co KG | Celle | D | privat-bahn.de |
| 12 | NB | CONSOLIDATED RAIL CORP. [NORTHAMPTON & BATH RR] | | | PWRC |
| 13 | NB | Northampton and Bath Railroad (Conrail) | | | RSRV |
| 14 | NBA | North East Bolivian Airways (NEBA) | Callsign: Neba, Founded in 1970. Ceased operations during 2006. | BOL | AVCODES |
| 15 | NBAC | NORFOLK, BALTIMORE & CAROLINA LINE | | | SCAC3 |
| 16 | NBAI | NIAGARA BAITS | | | SCAC4 |
| 17 | NBAN | NYK BULKSHIP (ATLANTIC) NV | | | SCAC4 |
| 18 | NBAW | NORDIA BULK A/S | | | SCAC4 |
| 19 | NBBC | NEWBURGH BEACON BUS CORP | | | SCAC3 |
| 20 | NBBC | NOBLES, BUTCH TRUCKING | | | SCAC4 |
| 21 | NBBH | NATIONAL BROKERS | | | SCAC3 |
| 22 | NBBS | NEBBS, R J TRANSPORTATION INC | | | SCAC3 |
| 23 | NBBS | N B TRUCKING LLC | | | SCAC4 |
| 24 | NBCC | NEPTUNE BUS COMPANY INC | | | SCAC3 |
| 25 | NBCC | NINE ZERO TWO FOUR-ONE EIGHT ZERO T | | | SCAC4 |
| 26 | NBCG | NORTHEAST BULK CARTAGE COMPANY | | | SCAC3 |
| 27 | NBCH | NINE ZERO SEVEN SIX-NINE THREE TWO | | | SCAC4 |
| 28 | NBCI | NATIONAL BUS CARRIERS LTD | | | SCAC3 |
| 29 | NBCI | NINE ZERO ZERO EIGHT-NINE SIX SIX F | | | SCAC4 |
| 30 | NBCL | NIELSON BROS CARRIERS LTD | | | SCAC3 |
| 31 | NBCO | NEIMAN BROS CO INC | | | SCAC3 |
| 32 | NBCR | NEW BRUNSWICK COAL AND RAILWAY | | | SCAC3 |
| 33 | NBCT | N B C TRANSPORTATION | | | SCAC3 |
| 34 | NBCT | N B C TRANSPORTATION | | | SCAC4 |
| 35 | NBCU | BUNNIK CREATIONS | | NL | BIC |
| 36 | NBCX | Nebraska Boiler Co. | 7/2000-7/2005 (not listed) | | NAKINA |
| 37 | NBCX | National Car Co. | 1/1943-4/1947 | | NAKINA |
| 38 | NBCX | National Butter Co. of Iowa (American Refrigerator Transit Co.) | 7/1935 | | NAKINA |
| 39 | NBCX | Nebraska Boiler Co. | Jul-00 | | NRHS |
| 40 | NBCX | *NATIONAL CAR CO. | | | PWRC |
| 41 | NBCX | +NEBRASKA BOILER CO. | | | PWRC |
| 42 | NBCX | Nebraska Boiler | | | RSRV |
| 43 | NBCX | NEBRASKA BOILER COMPANY | | | SCAC4 |
| 44 | NBDI | NORTHFORK BISON DISTRIBUTION INC | | | SCAC4 |
| 45 | NBDS | North Brabant German Railway Company | Dorog, Sand mine | NL | TRAFFIC |
| 46 | NBDT | NEW BRUNSWICK DEPARTMENT TOURISM AN | | | SCAC4 |
| 47 | NBE | Novosibirsk Aviaenterprise | Callsign: Nakair, | RUS | AVCODES |
| 48 | NBE | Novosibirsk Aviaenterprise | | | ICAO1 |
| 49 | NBE | NBE Rail GmbH | Aschaffenburg (NBE = Nordbayerische Eisenbahn) | D | privat-bahn.de |
| 50 | NBE | Nordbahn Eisenbahngesellschat mbH & Co KG | Kaltenkirchen | D | privat-bahn.de |
| 51 | NBE | Nordbayerische Eisenbahn GmbH | Real: NBEG | D | TRAFFIC |
| 52 | NBE | Nordbahn Eisenbahngesellschaft | | DE | VKM |
| 53 | NBEC | Canadian National Rys. | added 7/2009 | | NAKINA |
| 54 | NBEC | New Brunswick East Coast Ry. Co., Inc. | 7/2000-7/2005; eliminated 7/2009 | | NAKINA |
| 55 | NBEC | New Brunswick East Coast Ry. Co., Inc. | Jul-00 | | NRHS |
| 56 | NBEC | NEW BRUNSWICK EAST COAST RAILWAY CO. | | | PWRC |
| 57 | NBEC | New Brunswick East Coast Railway | | | RSRV |
| 58 | NBEC | NEW BRUNSWICK EAST COAST RAILWAY CO | | | SCAC4 |
| 59 | NBEG | NORTH BERGEN REX TRANSPORT INC | | | SCAC3 |
| 60 | NBEG | Nordbayerische Eisenbahn GmbH | | DE | VKM |
| 61 | NBEL | NOBEL SHIPPING INC | | | SCAC3 |
| 62 | NBEL | NOBLE LOGISTICS / NLS | | | SCAC4 |
| 63 | NBEL | NBE Logistik GmbH | | DE | VKM |
| 64 | NBEP | NELLY BELL EXPRESS | | | SCAC4 |
| 65 | NBEP | NBE Rail Polska | Owned by NBE Rail: Nordbayerische Eisenbahn | PL | TRAFFIC |
| 66 | NBER | Nittany & Bald Eagle R.R. Co. | added 1/1985; 1/1994-7/2005 | | NAKINA |
| 67 | NBER | Nittany & Bald Eagle R.R. Co. | added 1/85; 1/94-7/2000 | | NRHS |
| 68 | NBER | NITTANY & BALD EAGLE RAILROAD | | | PWRC |
| 69 | NBER | Nittany and Bald Eagle Railroad | | | RSRV |
| 70 | NBER | NITTANY & BALD EAGLE RAILROAD CO | | | SCAC3 |
| 71 | NBER | Nittany & Bald Eagle | | USA | TRAFFIC |
| 72 | NBES | N&B EXPRESS, INC | | | SCAC3 |
| 73 | NBES | N & B EXPRESS INC | | | SCAC4 |
| 74 | NBET | NEELEY, BILL E TRANSPORTATION INC | | | SCAC3 |
| 75 | NBFI | NATIONAL BEDDING & FURNITURE INDUST | | | SCAC3 |
| 76 | NBFM | NOBODYS BUSINESS FARM INC | | | SCAC4 |
| 77 | NBG | Norddeutsche Bahngesellschaft mbH | Celle | D | privat-bahn.de |
| 78 | NBGD | NEW BEDFORD GEAR DIV | | | SCAC3 |
| 79 | NBGT | N B G TRUCKING | | | SCAC3 |
| 80 | NBGU | ROLANDE LNG BV | | | SCAC4 |
| 81 | NBHI | NATIONAL BOAT HAULERS INC | | | SCAC4 |
| 82 | NBHM | NICKEL BROS HOUSE MOVING USA INC | | | SCAC4 |
| 83 | NBHR | NOBLE, H & R CONSTRUCTION LTD | | | SCAC4 |
| 84 | NBHT | NEW BHANDAL TRANSPORT INC | | | SCAC4 |
| 85 | NBIC | NANCY'S BROKERAGE INC | | | SCAC4 |
| 86 | NBIK | Nostalgiebahnen in Kärnten | | AT | VKM |
| 87 | NBIL | NB INTERSTATE LOGISTICS LLC | | | SCAC4 |
| 88 | NBIS | NORTHSTAR BISON | | | SCAC4 |
| 89 | NBIX | The CIT Group/Capital Finance, Inc. | added 4/2007 | | NAKINA |
| 90 | NBIX | Bombardier Capital Rail, Inc. | added 10/1999; 7/2000-7/2005; eliminated 4/2007 | | NAKINA |
| 91 | NBIX | Bombardier Capital Rail, Inc. | added 10/99; 7/2000 | | NRHS |
| 92 | NBIX | THE CIT GROUP/CAPITAL FINANCE, INC. [BOMBARDIER CAPITAL RAIL, INC.; NORRAIL INCORPORATED] | | | PWRC |
| 93 | NBIX | Bombardier Capital Rail | | | RSRV |
| 94 | NBIX | BOMBARDIER CAPITAL RAIL INC | | | SCAC4 |
| 95 | NBJ | Nora - Bergslags Järnväg | 1905 - 1979 | S | svenska-lok.se |
| 96 | NBJ | Nora - Bergslags Järnväg | 1905 - 1979 | S | TRAFFIC |
| 97 | NBJT | NELSON, B J TRANSPORTATION | | | SCAC4 |
| 98 | NBJU | NISSAN BUTSURYU CO LTD | | | SCAC4 |
| 99 | NBK | Albarka Air Services Ltd. | IATA: F4, Callsign: Al-Air, Name changed to Albarka Air Plc | WAN | AVCODES |
| 100 | NBK | Albarka Air Plc | IATA: F4, Callsign: Al-Air, Founded in 1999. Commenced operations in March 2000. Ceased operations on 30 April 2007. Name changed from Albarka Air Services Ltd. | WAN | AVCODES |
