Apparatus

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sensors Mode-S transponder

7C6D99

ICAO 24-bit transponder address · allocated to Australia

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

Hex
7C6D99
Octal
37066631
Decimal
8,154,521
Country
AU
Tail
VH-VXN
Type
B738
No current signal · last broadcast 30m ago
Flights observed
176
Distinct callsigns
20
Country
AU
Last broadcast
30m ago

Last known position

Most recent position reported by Mode-S 7C6D99.

Country allocation

The ICAO 24-bit address 7C6D99 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
QFA410 - 4 2026-06-17
QFA760 Qantas 3 2026-06-04
QFA739 - 3 2026-06-19
QFA632 Qantas 3 2026-05-26
QFA628 - 3 2026-06-21
QFA619 Qantas 3 2026-06-12
QFA616 Qantas 3 2026-06-01
QFA504 Qantas 3 2026-06-11
QFA503 Qantas 3 2026-06-21
QFA473 - 3 2026-06-22
QFA453 Qantas 3 2026-06-03
QFA442 - 3 2026-06-19
QFA746 Qantas 2 2026-06-11
QFA741 Qantas 2 2026-06-11
QFA740 Qantas 2 2026-05-24
QFA735 Qantas 2 2026-05-24
QFA733 - 2 2026-06-18
QFA693 Qantas 2 2026-05-31
QFA686 Qantas 2 2026-05-30
QFA683 Qantas 2 2026-05-30

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-06-23 QFA884 PER → ADL Jun 23, 01:20 UTCJun 23, 03:54 UTC2h 35m
2026-06-22 QFA761 - Jun 22, 20:04 UTCJun 22, 23:45 UTC3h 40m
2026-06-22 QFA473 SYD → MEL Jun 22, 07:40 UTCJun 22, 08:44 UTC1h 5m
2026-06-22 QFA535 BNE → SYD Jun 22, 04:34 UTCJun 22, 05:44 UTC1h 10m
2026-06-22 QFA614 MEL → BNE Jun 22, 01:29 UTCJun 22, 03:19 UTC1h 50m
2026-06-21 QFA423 SYD → MEL Jun 21, 23:10 UTCJun 22, 00:14 UTC1h 5m
2026-06-21 QFA503 BNE → SYD Jun 21, 20:40 UTCJun 21, 21:44 UTC1h 5m
2026-06-21 QFA628 MEL → BNE Jun 21, 08:30 UTCJun 21, 10:34 UTC2h 5m
2026-06-21 QFA627 BNE → MEL Jun 21, 04:39 UTCJun 21, 06:29 UTC1h 50m
2026-06-21 QFA524 SYD → BNE Jun 21, 02:24 UTCJun 21, 03:40 UTC1h 15m
2026-06-20 QFA6116 ADL → SYD Jun 20, 01:50 UTCJun 20, 03:19 UTC1h 30m
2026-06-19 QFA739 - Jun 19, 06:20 UTCJun 19, 06:54 UTC35m
2026-06-19 QFA739 - Jun 19, 05:00 UTCJun 19, 05:40 UTC40m
2026-06-19 QFA442 MEL → SYD Jun 19, 02:19 UTCJun 19, 03:20 UTC1h 0m
2026-06-18 QFA613 BNE → MEL Jun 18, 22:25 UTCJun 19, 00:29 UTC2h 4m
2026-06-18 QFA628 MEL → BNE Jun 18, 08:40 UTCJun 18, 10:30 UTC1h 50m
2026-06-18 QFA455 SYD → MEL Jun 18, 06:20 UTCJun 18, 07:30 UTC1h 10m
2026-06-18 QFA738 ADL → SYD Jun 18, 03:15 UTCJun 18, 04:45 UTC1h 30m
2026-06-18 QFA733 SYD → ADL Jun 18, 00:05 UTCJun 18, 02:00 UTC1h 55m
2026-06-17 QFA410 MEL → SYD Jun 17, 21:10 UTCJun 17, 22:10 UTC1h 0m
2026-06-17 QFA772 PER → MEL Jun 17, 09:55 UTCJun 17, 13:10 UTC3h 15m
2026-06-17 QFA769 MEL → PER Jun 17, 05:10 UTCJun 17, 08:45 UTC3h 35m
2026-06-17 QFA682 ADL → MEL Jun 17, 02:55 UTCJun 17, 03:50 UTC55m
2026-06-17 QFA733 SYD → ADL Jun 17, 00:05 UTCJun 17, 01:55 UTC1h 50m
2026-06-16 QFA468 MEL → SYD Jun 16, 06:54 UTCJun 16, 08:00 UTC1h 5m
2026-06-16 QFA625 BNE → MEL Jun 16, 03:35 UTCJun 16, 05:40 UTC2h 5m
2026-06-16 QFA612 MEL → BNE Jun 16, 00:29 UTCJun 16, 02:15 UTC1h 45m
2026-06-15 QFA415 - Jun 15, 22:05 UTCJun 15, 23:25 UTC1h 20m
2026-06-15 QFA646 PER → SYD Jun 15, 02:20 UTCJun 15, 06:10 UTC3h 50m
2026-06-14 QFA641 SYD → PER Jun 14, 20:15 UTCJun 15, 01:04 UTC4h 49m
2026-06-13 QFA410 MEL → SYD Jun 13, 21:10 UTCJun 13, 22:15 UTC1h 5m
2026-06-13 QFA471 SYD → MEL Jun 13, 07:45 UTCJun 13, 08:55 UTC1h 10m
2026-06-13 QFA454 MEL → SYD Jun 13, 05:40 UTCJun 13, 06:40 UTC1h 0m
2026-06-13 QFA443 SYD → MEL Jun 13, 03:10 UTCJun 13, 04:20 UTC1h 10m
2026-06-13 QFA519 BNE → SYD Jun 13, 00:35 UTCJun 13, 01:45 UTC1h 10m
2026-06-12 QFA558 SYD → BNE Jun 12, 12:00 UTCJun 12, 13:05 UTC1h 5m
2026-06-12 QFA551 BNE → SYD Jun 12, 08:45 UTCJun 12, 09:55 UTC1h 10m
2026-06-12 QFA538 SYD → BNE Jun 12, 06:15 UTCJun 12, 07:30 UTC1h 15m
2026-06-12 QFA448 MEL → SYD Jun 12, 03:45 UTCJun 12, 04:50 UTC1h 5m
2026-06-12 QFA619 BNE → MEL Jun 12, 00:10 UTCJun 12, 02:25 UTC2h 16m
2026-06-11 QFA504 SYD → BNE Jun 11, 21:15 UTCJun 11, 22:30 UTC1h 15m
2026-06-11 QFA746 ADL → SYD Jun 11, 09:55 UTCJun 11, 11:30 UTC1h 35m
2026-06-11 QFA741 SYD → ADL Jun 11, 06:55 UTCJun 11, 08:45 UTC1h 50m
2026-06-11 QFA448 MEL → SYD Jun 11, 03:35 UTCJun 11, 04:50 UTC1h 15m
2026-06-11 QFA619 BNE → MEL Jun 11, 00:10 UTCJun 11, 02:05 UTC1h 55m
2026-06-10 QFA504 SYD → BNE Jun 10, 21:15 UTCJun 10, 22:25 UTC1h 10m
2026-06-10 QFA551 BNE → SYD Jun 10, 08:50 UTCJun 10, 10:05 UTC1h 15m
2026-06-10 QFA865 BNE → CBR Jun 10, 03:00 UTCJun 10, 07:20 UTC4h 20m
2026-06-09 QFA610 MEL → BNE Jun 9, 23:40 UTCJun 10, 01:35 UTC1h 55m
2026-06-09 QFA670 ADL → MEL Jun 9, 20:40 UTCJun 9, 21:45 UTC1h 5m

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

Mode-S 7C6D99 frequently asked

What is Mode-S code 7C6D99?
7C6D99 is an ICAO 24-bit transponder address. Allocated to Australia. Assigned to VH-VXN.
Where is Mode-S 7C6D99 registered?
Mode-S code 7C6D99 is allocated to Australia (AU). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 7C6D99 broadcasting right now?
No active broadcast right now. Last signal was 30m ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 7C6D99, octal 37066631, decimal 8,154,521.
What flights does 7C6D99 operate?
Mode-S 7C6D99 has broadcast 20 distinct callsigns, including QFA410, QFA760, QFA739, QFA632, QFA628.