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
Broadcasting now · callsign QFA935 · 36,000 ft
Flights observed
11
Distinct callsigns
5
Country
AU
Last broadcast
15h ago

Current position

7C6DDB is currently broadcasting. Map zoomed to live position.

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 5 distinct

Callsign Airline Flights Last seen
QFA162 - 3 2026-04-13
QFA196 Qantas 2 2026-04-14
QFA164 - 2 2026-04-13
QFA163 - 2 2026-04-13
QFA161 Qantas 2 2026-04-13

Recent flights last 11

DateFlightRouteTakeoffLandingDuration
2026-04-14 QFA196 WLG → BNE Apr 14, 07:10 UTCApr 14, 07:50 UTC40m
2026-04-14 QFA196 WLG → BNE Apr 14, 06:50 UTCApr 14, 07:10 UTC20m
2026-04-13 QFA162 - Apr 13, 20:45 UTCApr 13, 21:30 UTC45m
2026-04-13 QFA162 - Apr 13, 18:15 UTCApr 13, 18:25 UTC10m
2026-04-13 QFA163 - Apr 13, 11:45 UTCApr 13, 11:55 UTC10m
2026-04-13 QFA163 - Apr 13, 09:20 UTCApr 13, 09:50 UTC30m
2026-04-13 QFA164 - Apr 13, 06:50 UTCApr 13, 07:35 UTC45m
2026-04-13 QFA164 - Apr 13, 04:15 UTCApr 13, 04:25 UTC10m
2026-04-13 QFA161 SYD → WLG Apr 13, 02:45 UTCApr 13, 02:55 UTC10m
2026-04-13 QFA161 SYD → WLG Apr 13, 00:20 UTCApr 13, 00:50 UTC30m
2026-04-12 QFA162 - Apr 12, 18:20 UTCApr 12, 18:30 UTC10m

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?
Yes. Mode-S 7C6DDB is currently airborne.
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 5 distinct callsigns, including QFA162, QFA196, QFA164, QFA163, QFA161.