Apparatus

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sensors Mode-S transponder

7C6DDB

ICAO 24-bit transponder address · allocated to Australia

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

Hex
7C6DDB
Octal
37066733
Decimal
8,154,587
Country
AU
Tail
VH-VZH
Type
B738
No current signal · last broadcast 1h ago
Flights observed
360
Distinct callsigns
20
Country
AU
Last broadcast
1h ago

Last known position

Most recent position reported by Mode-S 7C6DDB.

Country allocation

The ICAO 24-bit address 7C6DDB 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
QFA161 - 9 2026-06-13
QFA164 Qantas 8 2026-06-13
QFA857 - 6 2026-07-02
QFA856 - 6 2026-07-02
QFA166 - 6 2026-07-12
QFA163 Qantas 6 2026-05-26
QFA162 Qantas 6 2026-05-26
QFA147 - 6 2026-07-10
QFA938 Qantas 5 2026-04-16
QFA935 Qantas 5 2026-04-28
QFA545 - 5 2026-06-24
QFA501 Qantas 5 2026-07-05
QFA167 - 5 2026-07-15
QFA142 Qantas 5 2026-06-06
QFA849 Qantas 4 2026-06-10
QFA848 Qantas 4 2026-06-10
QFA776 - 4 2026-06-21
QFA749 Qantas 4 2026-06-01
QFA620 - 4 2026-06-24
QFA478 - 4 2026-07-03

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-15 QFA134 - Jul 15, 04:00 UTCJul 15, 04:20 UTC20m
2026-07-15 QFA167 - Jul 15, 02:30 UTCJul 15, 02:50 UTC20m
2026-07-14 QFA167 - Jul 14, 23:40 UTCJul 15, 00:15 UTC35m
2026-07-14 QFA168 - Jul 14, 18:45 UTCJul 14, 22:15 UTC3h 30m
2026-07-14 QFA169 MEL → CHC Jul 14, 09:50 UTCJul 14, 12:50 UTC3h 0m
2026-07-14 QFA178 - Jul 14, 03:30 UTCJul 14, 06:45 UTC3h 15m
2026-07-13 QFA177 - Jul 13, 23:10 UTCJul 14, 01:40 UTC2h 30m
2026-07-13 QFA158 - Jul 13, 09:00 UTCJul 13, 12:55 UTC3h 55m
2026-07-13 QFA155 - Jul 13, 03:45 UTCJul 13, 06:45 UTC3h 0m
2026-07-13 QFA678 ADL → MEL Jul 13, 00:50 UTCJul 13, 01:55 UTC1h 5m
2026-07-12 QFA675 MEL → ADL Jul 12, 23:00 UTCJul 13, 00:01 UTC1h 0m
2026-07-12 QFA637 BNE → MEL Jul 12, 09:20 UTCJul 12, 11:25 UTC2h 5m
2026-07-12 QFA166 - Jul 12, 03:45 UTCJul 12, 05:01 UTC1h 15m
2026-07-11 QFA166 - Jul 11, 23:45 UTCJul 11, 23:55 UTC10m
2026-07-11 QFA165 BNE → ROR Jul 11, 00:40 UTCJul 11, 06:25 UTC5h 45m
2026-07-10 QFA120 - Jul 10, 21:00 UTCJul 10, 22:05 UTC1h 5m
2026-07-10 QFA120 - Jul 10, 18:45 UTCJul 10, 18:55 UTC10m
2026-07-10 QFA147 - Jul 10, 10:40 UTCJul 10, 11:00 UTC20m
2026-07-10 QFA147 - Jul 10, 08:25 UTCJul 10, 08:55 UTC30m
2026-07-10 QFA180 SYD → SYD Jul 10, 00:15 UTCJul 10, 06:00 UTC5h 45m
2026-07-09 QFA404 MEL → SYD Jul 9, 20:30 UTCJul 9, 22:00 UTC1h 30m
2026-07-09 QFA631 BNE → MEL Jul 9, 06:45 UTCJul 9, 08:40 UTC1h 55m
2026-07-08 QFA940 PER → BNE Jul 8, 10:15 UTCJul 8, 14:10 UTC3h 55m
2026-07-08 QFA937 BNE → PER Jul 8, 04:00 UTCJul 8, 09:15 UTC5h 15m
2026-07-07 QFA550 - Jul 7, 09:25 UTCJul 7, 10:35 UTC1h 10m
2026-07-07 QFA6112 MEL → SYD Jul 7, 07:15 UTCJul 7, 08:25 UTC1h 10m
2026-07-07 QFA449 SYD → MEL Jul 7, 05:10 UTCJul 7, 06:15 UTC1h 5m
2026-07-07 QFA523 BNE → SYD Jul 7, 02:50 UTCJul 7, 04:00 UTC1h 10m
2026-07-07 QFA512 SYD → BNE Jul 7, 00:25 UTCJul 7, 01:35 UTC1h 10m
2026-07-06 QFA480 MEL → SYD Jul 6, 08:40 UTCJul 6, 09:55 UTC1h 15m
2026-07-06 QFA461 SYD → MEL Jul 6, 06:20 UTCJul 6, 07:25 UTC1h 5m
2026-07-06 QFA438 MEL → SYD Jul 6, 01:15 UTCJul 6, 02:25 UTC1h 10m
2026-07-05 QFA423 SYD → MEL Jul 5, 23:10 UTCJul 6, 00:15 UTC1h 5m
2026-07-05 QFA501 BNE → SYD Jul 5, 20:10 UTCJul 5, 21:20 UTC1h 10m
2026-07-05 QFA166 - Jul 5, 03:05 UTCJul 5, 04:20 UTC1h 15m
2026-07-04 QFA166 - Jul 4, 23:15 UTCJul 4, 23:25 UTC10m
2026-07-04 QFA165 - Jul 4, 06:25 UTCJul 4, 06:40 UTC15m
2026-07-04 QFA165 - Jul 4, 01:00 UTCJul 4, 02:30 UTC1h 30m
2026-07-03 QFA558 - Jul 3, 12:15 UTCJul 3, 13:20 UTC1h 5m
2026-07-03 QFA478 MEL → SYD Jul 3, 08:40 UTCJul 3, 09:40 UTC1h 0m
2026-07-03 QFA764 PER → MEL Jul 3, 03:55 UTCJul 3, 07:15 UTC3h 20m
2026-07-03 QFA1201 KGI → PER Jul 3, 01:40 UTCJul 3, 02:35 UTC55m
2026-07-02 QFA1200 PER → KGI Jul 2, 22:50 UTCJul 3, 00:50 UTC2h 0m
2026-07-02 QFA857 - Jul 2, 11:30 UTCJul 2, 15:50 UTC4h 20m
2026-07-02 QFA856 - Jul 2, 07:05 UTCJul 2, 10:35 UTC3h 30m
2026-07-02 QFA645 SYD → PER Jul 2, 01:10 UTCJul 2, 05:50 UTC4h 40m
2026-07-01 QFA732 ADL → SYD Jul 1, 21:25 UTCJul 1, 22:50 UTC1h 25m
2026-07-01 QFA888 PER → ADL Jul 1, 09:15 UTCJul 1, 11:45 UTC2h 30m
2026-07-01 QFA889 ADL → PER Jul 1, 05:00 UTCJul 1, 08:15 UTC3h 15m
2026-07-01 QFA884 PER → ADL Jul 1, 01:30 UTCJul 1, 03:55 UTC2h 25m

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-VZH page for operator, model, and routing details .

Mode-S 7C6DDB frequently asked

What is Mode-S code 7C6DDB?
7C6DDB is an ICAO 24-bit transponder address. Allocated to Australia. Assigned to VH-VZH.
Where is Mode-S 7C6DDB registered?
Mode-S code 7C6DDB is allocated to Australia (AU). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 7C6DDB broadcasting right now?
No active broadcast right now. Last signal was 1h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 7C6DDB, octal 37066733, decimal 8,154,587.
What flights does 7C6DDB operate?
Mode-S 7C6DDB has broadcast 20 distinct callsigns, including QFA161, QFA164, QFA857, QFA856, QFA166.