Apparatus

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sensors Mode-S transponder

7C6DD5

ICAO 24-bit transponder address · allocated to Australia

Currently assigned to VH-VZB · BOEING 737-800 · operated by QANTAS AIRWAYS LIMITED

Hex
7C6DD5
Octal
37066725
Decimal
8,154,581
Country
AU
Tail
VH-VZB
Type
B738
No current signal · last broadcast 2h ago
Flights observed
179
Distinct callsigns
20
Country
AU
Last broadcast
2h ago

Last known position

Most recent position reported by Mode-S 7C6DD5.

Country allocation

The ICAO 24-bit address 7C6DD5 falls within the block assigned to Australia (AU) by ICAO Annex 10, Volume III. Every aircraft registered in Australia receives a permanent address from this block at the time of registration; the address stays with the airframe even if the aircraft is re-registered to a different operator within the country.

Callsign history 20 distinct

Callsign Airline Flights Last seen
QFA941 - 4 2026-04-14
QFA937 Qantas 4 2026-05-10
QFA889 Qantas 4 2026-05-22
QFA772 Qantas 4 2026-05-10
QFA766 Qantas 4 2026-04-18
QFA651 Qantas 4 2026-05-13
QFA145 Qantas 4 2026-05-27
QFA942 Qantas 3 2026-04-14
QFA888 Qantas 3 2026-05-22
QFA883 Qantas 3 2026-04-26
QFA678 Qantas 3 2026-05-22
QFA675 Qantas 3 2026-05-21
QFA644 Qantas 3 2026-05-01
QFA620 Qantas 3 2026-05-25
QFA148 Qantas 3 2026-05-27
QFA142 Qantas 3 2026-05-26
QFA887 Qantas 2 2026-04-30
QFA884 Qantas 2 2026-04-17
QFA857 Qantas 2 2026-05-03
QFA856 Qantas 2 2026-05-03

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-05-30 QFA183 BNE → NLK May 30, 01:45 UTCMay 30, 02:25 UTC40m
2026-05-29 QFA198 APW → BNE May 29, 11:55 UTCMay 30, 00:20 UTC12h 25m
2026-05-29 QFA196 WLG → BNE May 29, 06:30 UTCMay 29, 07:40 UTC1h 10m
2026-05-29 QFA196 WLG → BNE May 29, 04:00 UTCMay 29, 04:10 UTC10m
2026-05-28 QFA195 BNE → WLG May 28, 23:35 UTCMay 29, 02:50 UTC3h 15m
2026-05-28 QFA120 AKL → BNE May 28, 18:30 UTCMay 28, 21:35 UTC3h 5m
2026-05-28 QFA147 SYD → AKL May 28, 08:15 UTCMay 28, 11:00 UTC2h 45m
2026-05-28 QFA122 ZQN → SYD May 28, 03:40 UTCMay 28, 06:40 UTC3h 0m
2026-05-27 QFA121 SYD → ZQN May 27, 23:50 UTCMay 28, 02:10 UTC2h 20m
2026-05-27 QFA148 AKL → SYD May 27, 06:40 UTCMay 27, 09:50 UTC3h 10m
2026-05-27 QFA145 SYD → AKL May 27, 04:04 UTCMay 27, 04:24 UTC20m
2026-05-27 QFA145 SYD → AKL May 27, 02:04 UTCMay 27, 02:34 UTC30m
2026-05-26 QFA142 AKL → SYD May 26, 23:05 UTCMay 26, 23:45 UTC40m
2026-05-26 QFA142 AKL → SYD May 26, 20:34 UTCMay 26, 20:54 UTC20m
2026-05-26 QFA157 MEL → AKL May 26, 09:04 UTCMay 26, 12:10 UTC3h 5m
2026-05-26 QFA156 AKL → MEL May 26, 03:40 UTCMay 26, 07:40 UTC4h 0m
2026-05-25 QFA119 BNE → AKL May 25, 22:34 UTCMay 26, 01:14 UTC2h 40m
2026-05-25 QFA620 MEL → BNE May 25, 04:45 UTCMay 25, 06:45 UTC2h 0m
2026-05-24 QFA621 BNE → MEL May 24, 23:00 UTCMay 25, 03:05 UTC4h 5m
2026-05-24 QFA045 MEL → DPS May 24, 08:20 UTCMay 24, 20:25 UTC12h 5m
2026-05-24 QFA172 WLG → MEL May 24, 02:50 UTCMay 24, 06:30 UTC3h 40m
2026-05-23 QFA171 MEL → WLG May 23, 22:35 UTCMay 24, 01:40 UTC3h 5m
2026-05-23 QFA475 MEL → PER May 23, 08:00 UTCMay 23, 09:00 UTC1h 0m
2026-05-23 QFA527 BNE → SYD May 23, 02:25 UTCMay 23, 03:35 UTC1h 9m
2026-05-22 QFA512 SYD → BNE May 22, 23:40 UTCMay 23, 00:45 UTC1h 5m
2026-05-22 QFA730 ADL → SYD May 22, 20:40 UTCMay 22, 22:10 UTC1h 30m
2026-05-22 QFA888 PER → ADL May 22, 09:15 UTCMay 22, 11:50 UTC2h 35m
2026-05-22 QFA889 ADL → PER May 22, 05:05 UTCMay 22, 08:00 UTC2h 55m
2026-05-22 QFA683 MEL → ADL May 22, 03:00 UTCMay 22, 04:10 UTC1h 10m
2026-05-22 QFA678 ADL → MEL May 22, 00:50 UTCMay 22, 01:55 UTC1h 5m
2026-05-21 QFA675 MEL → ADL May 21, 22:40 UTCMay 21, 23:40 UTC1h 0m
2026-05-21 QFA682 ADL → MEL May 21, 02:30 UTCMay 21, 03:35 UTC1h 5m
2026-05-21 QFA679 MEL → ADL May 21, 00:35 UTCMay 21, 01:35 UTC1h 0m
2026-05-20 QFA152 AKL → MEL May 20, 18:30 UTCMay 20, 22:20 UTC3h 50m
2026-05-20 QFA157 MEL → AKL May 20, 08:30 UTCMay 20, 11:45 UTC3h 15m
2026-05-20 QFA156 AKL → MEL May 20, 03:25 UTCMay 20, 07:05 UTC3h 41m
2026-05-20 QFA143 SYD → AKL May 20, 01:40 UTCMay 20, 02:00 UTC20m
2026-05-19 QFA143 SYD → AKL May 19, 23:20 UTCMay 19, 23:50 UTC30m
2026-05-19 QFA162 WLG → SYD May 19, 20:40 UTCMay 19, 21:25 UTC45m
2026-05-19 QFA162 WLG → SYD May 19, 18:10 UTCMay 19, 18:20 UTC10m
2026-05-19 QFA163 SYD → WLG May 19, 11:10 UTCMay 19, 11:30 UTC20m
2026-05-19 QFA163 SYD → WLG May 19, 08:45 UTCMay 19, 09:15 UTC30m
2026-05-19 QFA144 AKL → SYD May 19, 01:30 UTCMay 19, 04:35 UTC3h 5m
2026-05-18 QFA141 SYD → AKL May 18, 21:20 UTCMay 19, 00:00 UTC2h 40m
2026-05-18 QFA148 AKL → SYD May 18, 06:35 UTCMay 18, 09:45 UTC3h 10m
2026-05-18 QFA145 SYD → AKL May 18, 01:55 UTCMay 18, 04:40 UTC2h 45m
2026-05-17 QFA148 AKL → SYD May 17, 06:25 UTCMay 17, 09:30 UTC3h 5m
2026-05-17 QFA145 SYD → AKL May 17, 01:50 UTCMay 17, 04:30 UTC2h 40m
2026-05-16 QFA142 AKL → SYD May 16, 20:30 UTCMay 16, 23:25 UTC2h 55m
2026-05-16 QFA155 MEL → AKL May 16, 04:40 UTCMay 16, 08:01 UTC3h 21m

About Mode-S

A Mode-S transponder code (also called an "ICAO 24-bit address" or "hex code") is a 6-character hexadecimal identifier permanently assigned to an aircraft when it's first registered. Unlike callsigns (which change with each flight) or registrations (which can change if an aircraft is sold internationally), the Mode-S address stays with the airframe for the life of the aircraft in that country.

Every ADS-B transmission from an aircraft includes its Mode-S address, making it the most reliable way to identify a specific airframe. Flight-tracking services like Apparatus use the Mode-S address as the primary key for tying position broadcasts, callsigns, and ownership records together.

Prefer a tail-number view? See the VH-VZB page for operator, model, and routing details .

Mode-S 7C6DD5 frequently asked

What is Mode-S code 7C6DD5?
7C6DD5 is an ICAO 24-bit transponder address. Allocated to Australia. Assigned to VH-VZB.
Where is Mode-S 7C6DD5 registered?
Mode-S code 7C6DD5 is allocated to Australia (AU). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 7C6DD5 broadcasting right now?
No active broadcast right now. Last signal was 2h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 7C6DD5, octal 37066725, decimal 8,154,581.
What flights does 7C6DD5 operate?
Mode-S 7C6DD5 has broadcast 20 distinct callsigns, including QFA941, QFA937, QFA889, QFA772, QFA766.