| 1 | BZ | Keystone Air Service | ICAO: KEE, Callsign: Keystone, Designator BZ recalled by IATA | CDN | AVCODES |
| 2 | BZ | FTI Fluggeselischaft mbH | ICAO: FTI, Callsign: Frog-Line, Designator BZ* recalled by IATA. IATA code changed from FT* | D | AVCODES |
| 3 | BZ | Capital Airlines Ltd. | ICAO: CPG, Callsign: Capital, Ceased operations on 28 June 1990. | GB | AVCODES |
| 4 | BZ | Business Aircraft Users Association Ltd. | Callsign: Bizair, | GB | AVCODES |
| 5 | BZ | Blue Dart Aviation Ltd | ICAO: BDA, Callsign: Blue Dart, IATA Prefix: 620, | IND | AVCODES |
| 6 | BZ | Brittany Air International | ICAO: BZH, | F | AVCODES |
| 7 | BZ | Blue Bird Airways | ICAO: BBG, Callsign: Cadia Bird, Designator BZ reinstated by IATA | GR | AVCODES |
| 8 | BZA | Bizair Fluggesellschaft mbH | Callsign: Berlin Bear, Ceased operations due bankrupt in 2010. | D | AVCODES |
| 9 | BZA | Aerolineas Bonanza, S.A. de C.V. | Callsign: Bonan Air, | MEX | AVCODES |
| 10 | BZA | Bizair Fluggesellschaft | | | ICAO1 |
| 11 | BZAI | BRAZIL AND BRAZIL | | | SCAC3 |
| 12 | BZAQ | BONANZA TANK LINES INC | | | SCAC3 |
| 13 | BZAS | BENZ, A & S INC | | | SCAC3 |
| 14 | BZAS | BRAZILL BROTHERS & ASSOC INC | | | SCAC4 |
| 15 | BZB | Bayerische Zugspitzbahn AG | Garmisch-Partenkirchen | D | privat-bahn.de |
| 16 | BZB | Bayerische Zugspitzbahn | | D | TRAFFIC |
| 17 | BZBE | BUSY BEE TRUCKING | | | SCAC3 |
| 18 | BZCP | BEITZEL CORP | | | SCAC4 |
| 19 | BZCU | EMB GASTECHNIK GMBH & CO. KG | | D | BIC |
| 20 | BZCU | TESSENDERLO CHEMIE NV | | | SCAC4 |
| 21 | BZD | Canadian Global Air Ambulance Ltd | Callsign: Blizzard, Declared Bankrupt on 30 September 2008. | CDN | AVCODES |
| 22 | BZD | Canadian Global Air Ambulance | | | ICAO1 |
| 23 | BZDS | BOUZAS DELIVERY SERVICE | | | SCAC3 |
| 24 | BZDT | BRAZDA TRUCKING CO INC | | | SCAC4 |
| 25 | BZE | Zenith Aviation Ltd. | Callsign: Zenstar, | GB | AVCODES |
| 26 | BZEE | BRUYNZEEL TRUCKING LTD | | | SCAC3 |
| 27 | BZEI | BARZAGA EXPRESS INC | | | SCAC4 |
| 28 | BZEL | BEEZEL TRANSPORTATION INC | | | SCAC3 |
| 29 | BZEN | BLITZ EXPRESS INC | | | SCAC4 |
| 30 | BZEQ | BLITZ EXPRESS INC | | | SCAC4 |
| 31 | BZER | BLAZER EXPRESS INC | | | SCAC4 |
| 32 | BZEY | BOAZ EXPORT CRATING COMPANY | | | SCAC4 |
| 33 | BZF | Jet Aviation Business Jets | Callsign: Bizfleet, Name changed to Jet Aviation Flight Services, Inc. ICAO designator changed to JAS. ICAO callsign changed to Jet Setter. | USA | AVCODES |
| 34 | BZF | Jet Aviation Business Jets | | | ICAO1 |
| 35 | BZFC | BLIZZARD FREIGHT CO | | | SCAC3 |
| 36 | BZFJ | BRAZIL, FRANK J TRUCKING CO | | | SCAC3 |
| 37 | BZGB | Gleisbau Bautzen GmbH | | DE | VKM |
| 38 | BZGE | BRAZEE, GEORGE | | | SCAC4 |
| 39 | BZGL | BREEZE GLOBAL LOGISTICS | | | SCAC4 |
| 40 | BZH | Brit Air | IATA: DB, Callsign: Britair, IATA Prefix: 750, Name changed to Brit Air t/a HOP! Brit Air. Name changed from Brittany Air International | F | AVCODES |
| 41 | BZH | Brittany Air International | IATA: BZ, | F | AVCODES |
| 42 | BZH | Brit Air t/a HOP! Brit Air | IATA: DB, Callsign: Britair, IATA Prefix: 750, Name changed from Brit Air. Name changed from Brittany Air International | F | AVCODES |
| 43 | BZH | Brit Air | IATA: DB | | ICAO1 |
| 44 | BZH | Brit Air | | F | TRAFFIC |
| 45 | BZIC | BULL TRANZ INC | | | SCAC4 |
| 46 | BZIH | BRAZILIAN HOPE SHIPPING | | | SCAC3 |
| 47 | BZIO | BISANZIO DI NAVIGAZIONE SRL | | | SCAC3 |
| 48 | BZJC | BINTZ, JOHN CODDINGTON | | | SCAC3 |
| 49 | BZJT | BOZARD, J T INC | | | SCAC3 |
| 50 | BZK | Bocheński Zakład Komunikacji | City: Bochnia | PL | TRAFFIC |
| 51 | BZK | Bulgarian Railway company / Българска железопътна компания | | BG | VKM |
| 52 | BZKF | BUCHHOLZ & KUTTRUFF INC. | | | SCAC3 |
| 53 | BZLC | BROTHER Z LOGISTICS INC | | | SCAC4 |
| 54 | BZLE | BRI-ZEL ENTERPRISES LLC | | | SCAC4 |
| 55 | BZLG | BRAZOS LOGISTICS INC | | | SCAC4 |
| 56 | BZLI | BRAZIL MOVING & STORAGE INC | | | SCAC3 |
| 57 | BZLI | B & Z LOGISTICS INC | | | SCAC4 |
| 58 | BZLL | BAZELL OIL CO INC | | | SCAC4 |
| 59 | BZLO | BREAZELE TRANSFER & STORAGE CO INC | | | SCAC3 |
| 60 | BZMA | BUCHHOLZ, M A INC | | | SCAC3 |
| 61 | BZMG | BARANZINI MOLINA, AGUSTIN | | | SCAC4 |
| 62 | BZMQ | BENITEZ MOBILE SERVICES INC | | | SCAC4 |
| 63 | BZMS | BLITZ MOVING SERVICES | | | SCAC3 |
| 64 | BZNA | BARZ NORTH AMERICAN | | | SCAC3 |
| 65 | BZNL | BLITZ TRANSPORTATION LLC | | | SCAC4 |
| 66 | BZOO | BOWMANVILLE ZOO | | | SCAC4 |
| 67 | BZOS | BRAZILLIAN OVERSEAS SHIPPING SVCS. | | | SCAC3 |
| 68 | BZOS | BRAZILLIAN OVERSEAS SHIPPING SVCS. | | | SCAC4 |
| 69 | BZP | Jubilee Aviation Support Services Ltd. | Callsign: Jass, | WAN | AVCODES |
| 70 | BZPL | BAZEMORE, PALMER JR | | | SCAC4 |
| 71 | BZQ | Seneca College | Callsign: Sting, | CDN | AVCODES |
| 72 | BZR | Airbiz Aviation Services Worldwide | | PK | AVCODES |
| 73 | BZRD | BOLTZ, RONALD R | | | SCAC3 |
| 74 | BZRH | BRZEZINSKI, R H & SONS TRUCKING | | | SCAC3 |
| 75 | BZRH | BRZEZINSKI, R H & SONS TRUCKING LLC | | | SCAC4 |
| 76 | BZRT | BLAZING STAR TRANSPORT | | | SCAC4 |
| 77 | BZRV | BALFANZ, R V HORSE TRANSPORTATION | | | SCAC3 |
| 78 | BZRW | BOZEL, R W TRANSFER INC (TRUCKLOAD | | | SCAC4 |
| 79 | BZS | Aero Biniza, S.A. de C.V. | Callsign: Biniza, | MEX | AVCODES |
| 80 | BZS | Aero Biniza | | | ICAO1 |
| 81 | BZSL | BREEZE SHIPPING LLC | | | SCAC4 |
| 82 | BZSW | BLAZE SHIPPING LTF | | | SCAC4 |
| 83 | BZT | Bizjet Aircraft & Helicopters Management S.R.L. | Callsign: Business-Service, Name changed to Executive Aircraft Management S.r.l. | I | AVCODES |
| 84 | BZT | Executive Aircraft Management S.r.l. | Callsign: Business-Service, Name changed from Bizjet Aircraft & Helicopters Management S.R.L. | I | AVCODES |
| 85 | BZTC | BLIZZARD TRUCKING LLC | | | SCAC4 |
| 86 | BZTG | BIG Z TRUCKING COMPANY | | | SCAC3 |
| 87 | BZTI | BROTHER Z TRANSPORT INC | | | SCAC4 |
| 88 | BZTL | BLIZZARD TRANSPORTATION LLC | | | SCAC4 |
| 89 | BZTP | BENTZS TOWN PUMP | | | SCAC4 |
| 90 | BZTR | BLITZ TRANSPORTATION LLC | | | SCAC4 |
| 91 | BZTU | BOX2TRADE B.V | | NL | BIC |
| 92 | BZVL | BONANZA VAN LINES INC | | | SCAC3 |
| 93 | BZVL | BONANZA VAN LINES INC | | | SCAC4 |
| 94 | BZVQ | BRAZIL VAN & STORAGE | | | SCAC3 |
| 95 | BZVT | BONANZA VAN LINES OF LAWTON INC | | | SCAC4 |
| 96 | BZW | Zircon Airways Benin, S.A. | IATA: Z4, Callsign: Zircon, IATA Prefix: 573, Founded in 2001. Ceased operations in 2002. | DY | AVCODES |
| 97 | BZWS | BEITZ WRECKER SERVICE | | | SCAC3 |
| 98 | BZX | Bravo Zulu (Malta) Ltd | | M | AVCODES |
| 99 | BZXC | BIZEX CANADA | | | SCAC4 |
| 100 | BZXL | BREEZER TRANSPORT LTD | | | SCAC4 |
