| 1 | ZB | Monarch Airlines Ltd. | ICAO: MON, Callsign: Monarch, IATA Prefix: 974, AOC withdrawn by CAA 02 October 2017. | GB | AVCODES |
| 2 | ZB | Air Albania Shpk | ICAO: ABN, Callsign: Air Albania, | AL | AVCODES |
| 3 | ZB | Zentralbahn | | CH | TRAFFIC |
| 4 | ZB | Zillertaler Verkehrsbetriebe AG | | AT | VKM |
| 5 | ZBA | Boskovic, Z, Air Charters Limited | Callsign: Bosky, | EAK | AVCODES |
| 6 | ZBA | Boskovic Air Charters Limited | | | ICAO1 |
| 7 | ZBAU | Zürcher Bau GmbH | | DE | VKM |
| 8 | ZBB | ZABABA s.r.o. | | CZ | VKM |
| 9 | ZBBV | ZEALAND BEATRIX BV | | | SCAC4 |
| 10 | ZBCHS | ZÁVOD BIOCHEMICKÝCH SLUŽEB, s.r.o. | | CZ | VKM |
| 11 | ZBEL | ZAMBELLI MANUFACTURING COMPANY INC | | | SCAC4 |
| 12 | ZBH | Zeljeznice Federacije Bosne i Hercegovine | | BIH | TRAFFIC |
| 13 | ZBIC | ZOMER BROTHERS INC | | | SCAC4 |
| 14 | ZBJA | ZAMORA BEAUREGARD, JUAN ANTONIO | | | SCAC4 |
| 15 | ZBLU | ZEBULUN CONTAINERS PTE LTD | | SGP | BIC |
| 16 | ZBM | Zeppelin Baumashinen GmbH | | DE | VKM |
| 17 | ZBPC | BP CHEMICALS (BP-AMOCO) | | | PWRC |
| 18 | ZBSI | ZEAGER BROS INC | | | SCAC4 |
| 19 | ZBTI | ZB TRANSPORT INC | | | SCAC4 |
| 20 | ZBTJ | ZIMBARDI, TIMOTHY J | | | SCAC4 |
| 21 | ZBTT | ZIEBA TRANSPORT | | | SCAC4 |
| 22 | ZBTX | Zalev Brothers Scrap Yard, Windsor, Ontario, Canada | | | RSRV |
| 23 | ZBXU | NAVLANDIS | | E | BIC |
| 24 | ZBXU | ZIM ISRAEL NAVIGATION CO LTD | | | PWRC |
| 25 | ZBXU | Zim Israel Navigation Limited | | | RSRV |
