| 101 | ZAS | ZAS Airlines of Egypt | | | ICAO1 |
| 102 | ZAS | ZAS Zweckverband Abfallverw. Südostb. | | DE | VKM |
| 103 | ZAST | Zastava | | YU | TRAFFIC |
| 104 | ZATA | ZAPATA MUNIZ, GUADALUPE | | | SCAC4 |
| 105 | ZATO | ZATOPEK OIL | | | SCAC4 |
| 106 | ZATU | GEODIS ZUST AMBROSETTI SPA | | | SCAC4 |
| 107 | ZATV | ZEEMAN AUTO & TRUCKING SERVICES INC | | | SCAC4 |
| 108 | ZAV | Zhetysu Avia | Callsign: Zhetysu Avia, | KZ | AVCODES |
| 109 | ZAV | Zetavia Limited, Aircompany | IATA: ZK, Callsign: Zetavia, IATA Prefix: 686, | UA | AVCODES |
| 110 | ZAVA | ZAVALZA TRUCKING COMPANY INC | | | SCAC4 |
| 111 | ZAW | Z-Airways & Services Ltd. | Callsign: Zed Air, | BD | AVCODES |
| 112 | ZAW | Zoom Airways | | | ICAO1 |
| 113 | ZAWCO | Zweckverband Abfallwirtschaft Nordwest Oberfranken | | DE | VKM |
| 114 | ZAWI | Zakład Komunikacji Miejskiej w Zawierciu | | PL | TRAFFIC |
| 115 | ZAWK | ZIMMERMANS AUTO WRECKING | | | SCAC4 |
| 116 | ZAZ | | | | TRAFFIC |
| 117 | ZAZA | ZAZUETA TRANSPORT INC | | | SCAC4 |
| 118 | ZB | Monarch Airlines Ltd. | ICAO: MON, Callsign: Monarch, IATA Prefix: 974, AOC withdrawn by CAA 02 October 2017. | GB | AVCODES |
| 119 | ZB | Air Albania Shpk | ICAO: ABN, Callsign: Air Albania, | AL | AVCODES |
| 120 | ZB | Zentralbahn | | CH | TRAFFIC |
| 121 | ZB | Zillertaler Verkehrsbetriebe AG | | AT | VKM |
| 122 | ZBA | Boskovic, Z, Air Charters Limited | Callsign: Bosky, | EAK | AVCODES |
| 123 | ZBA | Boskovic Air Charters Limited | | | ICAO1 |
| 124 | ZBAU | Zürcher Bau GmbH | | DE | VKM |
| 125 | ZBB | ZABABA s.r.o. | | CZ | VKM |
| 126 | ZBBV | ZEALAND BEATRIX BV | | | SCAC4 |
| 127 | ZBCHS | ZÁVOD BIOCHEMICKÝCH SLUŽEB, s.r.o. | | CZ | VKM |
| 128 | ZBEL | ZAMBELLI MANUFACTURING COMPANY INC | | | SCAC4 |
| 129 | ZBH | Zeljeznice Federacije Bosne i Hercegovine | | BIH | TRAFFIC |
| 130 | ZBIC | ZOMER BROTHERS INC | | | SCAC4 |
| 131 | ZBJA | ZAMORA BEAUREGARD, JUAN ANTONIO | | | SCAC4 |
| 132 | ZBLU | ZEBULUN CONTAINERS PTE LTD | | SGP | BIC |
| 133 | ZBM | Zeppelin Baumashinen GmbH | | DE | VKM |
| 134 | ZBPC | BP CHEMICALS (BP-AMOCO) | | | PWRC |
| 135 | ZBSI | ZEAGER BROS INC | | | SCAC4 |
| 136 | ZBTI | ZB TRANSPORT INC | | | SCAC4 |
| 137 | ZBTJ | ZIMBARDI, TIMOTHY J | | | SCAC4 |
| 138 | ZBTT | ZIEBA TRANSPORT | | | SCAC4 |
| 139 | ZBTX | Zalev Brothers Scrap Yard, Windsor, Ontario, Canada | | | RSRV |
| 140 | ZBXU | NAVLANDIS | | E | BIC |
| 141 | ZBXU | ZIM ISRAEL NAVIGATION CO LTD | | | PWRC |
| 142 | ZBXU | Zim Israel Navigation Limited | | | RSRV |
| 143 | ZC | Royal Swazi National Airways Corp. | ICAO: RSN, Callsign: Swazi National, IATA Prefix: 141, Designator ZC recalled by IATA | SD | AVCODES |
| 144 | ZC | Korongo Airlines sprl | ICAO: KGO, Callsign: Korongo, IATA Prefix: 557, Ceased operations on 04 September 2015. Founded 15 December 2009. Operations commenced 16 April 2012. | ZRE | AVCODES |
| 145 | ZC | NU-Aero (Pvt) Ltd t/a Fly Africa Zimbabwe | ICAO: FZW, Operations commenced on 01 August 2014. | ZW | AVCODES |
| 146 | ZC | Flyafrica Zimbabwe (PVT) Limited | ICAO: FZW, | ZW | AVCODES |
| 147 | ZC | Railway of the Democratic Peoples Republic of Korea (ЗЧ) | | KP | VKM |
| 148 | ZCAX | Zinc Corp. of America (previously St. Joe Minerals Corp., reporting marks SJMX) | added 10/1988; 1/1994-7/2000; eliminated 10/2002; 7/2005 (not listed) | | NAKINA |
| 149 | ZCAX | Zinc Corp. of America (previously St. Joe Minerals Corp., reporting marks SJMX) | added 10/88; 1/94-7/2000 | | NRHS |
| 150 | ZCAX | ZINC CORPORATION OF AMERICA (PREVIOUSLY ST. JOE MINERALS CORP., REPORTING MARK SJMX) | | | PWRC |
| 151 | ZCAX | Zinc Corporation of America | | | RSRV |
| 152 | ZCAX | ZINC CORPORATION OF AMERICA | | | SCAC4 |
| 153 | ZCCN | ZOLADZ CONSTRUCTION CO INC | | | SCAC4 |
| 154 | ZCCX | Zeigler Coal Co. | added 1/1979; 1/1980-1/1994; eliminated 7/1999; 7/2000-7/2005 (not listed) | | NAKINA |
| 155 | ZCCX | Zeigler Coal Co. | added 1/79; 1/80-1/94; eliminated 7/99; 7/2000 | | NRHS |
| 156 | ZCCX | ZEIGLER COAL COMPANY | | | PWRC |
| 157 | ZCCX | Zeigler Coal | | | RSRV |
| 158 | ZCCX | ZEIGLER COAL COMPANY | | | SCAC4 |
| 159 | ZCDV | ZANIN CD DVD INC | | | SCAC4 |
| 160 | ZCG | Zeljeznica Crne Gore | | CG | TRAFFIC |
| 161 | ZCG | Željeznice Crne Gore | | ME | VKM |
| 162 | ZCHA | Zakłady Chemiczne “Alwernia” S.A. | | PL | VKM |
| 163 | ZCHLU | LUVENA S.A. | | PL | VKM |
| 164 | ZCHN | ZAMUDIO CAMACHO, HOUSTON | | | SCAC4 |
| 165 | ZCHR | ZAKŁADY CHEMICZNE “RUDNIKI” S.A. | | PL | VKM |
| 166 | ZCHSA | Zakłady Chemiczne „Organika-Sarzyna” S.A. | | PL | VKM |
| 167 | ZCHSI | Zakłady Chemiczne “Siarkopol” Tarnobrzeg Sp. z o.o. | | PL | VKM |
| 168 | ZCHZ | Zakłady Chemiczne ZACHEM S.A. | | PL | VKM |
| 169 | ZCIN | ZAI CARGO INC | | | SCAC4 |
| 170 | ZCJA | ZUNIGA CARDENAS, JAVIER ALEJANDRO | | | SCAC4 |
| 171 | ZCKF | ZACKY FARMS | | | SCAC4 |
| 172 | ZCKT | ZUECK TRANSPORTATION COMPANY | | | SCAC4 |
| 173 | ZCLU | ZIM INTEGRATED SHIPPING SERVICES LTD | | IL | BIC |
| 174 | ZCLU | ZIM ISRAEL NAVIGATION CO LTD | | | SCAC4 |
| 175 | ZCSU | ZIM INTEGRATED SHIPPING SERVICES LTD | | IL | BIC |
| 176 | ZCSU | ZIM AMERICAN ISRAELI SHIPPING CO INC | | | PWRC |
| 177 | ZCSU | Zim American Israeli Shipping | | | RSRV |
| 178 | ZCSU | ZIM ISRAEL NAVIGATION CO LTD | | | SCAC4 |
| 179 | ZCSV | ZAP COURIER SERVICES | | | SCAC4 |
| 180 | ZD | Coral Air Niue | Designator ZD* recalled by IATA | NZ | AVCODES |
| 181 | ZD | EWA Air | ICAO: EWR, Callsign: Mayotte Air, IATA Prefix: 732, Commenced operations in 2013. | MYT | AVCODES |
| 182 | ZDAZ | XTRA INTERMODAL | | | PWRC |
| 183 | ZDAZ | XTRA Intermodal | | | RSRV |
| 184 | ZDBV | ZEALAND DELILAH BV | | | SCAC4 |
| 185 | ZDDT | ZELLER, D & D TRUCKING INC | | | SCAC4 |
| 186 | ZDEL | ZENA D ENTERPRISES LTD | | | SCAC4 |
| 187 | ZDF | ZDF (Television) | | D | TRAFFIC |
| 188 | ZDJT | ZIMA, D & J TRUCKING | | | SCAC4 |
| 189 | ZDMS | ZBIGNIEW, DMOCHOWSKI | | | SCAC4 |
| 190 | ZDSI | ZDS INTERNATIONAL INC | | | SCAC4 |
| 191 | ZDSU | TELESPAZIO FRANCE | | F | BIC |
| 192 | ZDSU | ZODIAC DATA SYSTEM | | | SCAC4 |
| 193 | ZDSV | ZOOM DELIVERY SERVICES INC | | | SCAC4 |
| 194 | ZDTI | ZERO DOWN TIME INC | | | SCAC4 |
| 195 | ZDTR | ZAIDE TRANSPORT | | | SCAC4 |
| 196 | ZDUN | Miejskie Przedsiębiorstwo Komunikacji sp. z o.o. Zduńska Wol | | PL | TRAFFIC |
| 197 | ZDUP | E. I. DUPONT DE NEMOURS | | | PWRC |
| 198 | ZDXU | SHANGHAI ZUODI SUPPLY CHAIN CO., LTD. | | PRC | BIC |
| 199 | ZE | Cosmos Air Luftfahrtunternehmen GmbH | ICAO: AZE, Callsign: Arcus Air, Name changed to Arcus Air Logistic GmbH | D | AVCODES |
| 200 | ZE | Lineas Aereas Azteca, S.A. de C.V. | ICAO: LCD, Callsign: Lineas Azteca, IATA Prefix: 994, Operations suspended by the government in March 2007. AOC cancelled in October 2007. | MEX | AVCODES |
