Apparatus

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sensors Mode-S transponder

7C4A01

ICAO 24-bit transponder address · allocated to Australia

Currently assigned to VH-OWJ · PILATUS PC-12 · operated by ROYAL FLYING DOCTOR SERVICE OF AUSTRALIA (WESTERN OPERATIONS)

Hex
7C4A01
Octal
37045001
Decimal
8,145,409
Country
AU
Tail
VH-OWJ
Type
PC12
No current signal · last broadcast 10d ago
Flights observed
105
Distinct callsigns
2
Country
AU
Last broadcast
10d ago

Last known position

Most recent position reported by Mode-S 7C4A01.

Country allocation

The ICAO 24-bit address 7C4A01 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 2 distinct

Callsign Airline Flights Last seen
FD608 Thai AirAsia 99 2026-05-24
VHOWJ - 5 2026-05-12

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-05-24 FD608 DMK → PNH May 24, 05:40 UTCMay 24, 06:20 UTC40m
2026-05-24 FD608 DMK → PNH May 24, 02:55 UTCMay 24, 03:40 UTC45m
2026-05-22 FD608 DMK → PNH May 22, 06:55 UTCMay 22, 07:35 UTC40m
2026-05-20 FD608 DMK → PNH May 20, 11:55 UTCMay 20, 12:20 UTC25m
2026-05-20 FD608 DMK → PNH May 20, 07:55 UTCMay 20, 08:20 UTC25m
2026-05-20 FD608 DMK → PNH May 20, 01:15 UTCMay 20, 01:50 UTC35m
2026-05-20 FD608 DMK → PNH May 20, 00:25 UTCMay 20, 00:40 UTC15m
2026-05-18 FD608 DMK → PNH May 18, 20:45 UTCMay 18, 20:55 UTC10m
2026-05-18 FD608 DMK → PNH May 18, 19:40 UTCMay 18, 20:15 UTC35m
2026-05-18 FD608 DMK → PNH May 18, 18:10 UTCMay 18, 18:40 UTC29m
2026-05-18 FD608 DMK → PNH May 18, 15:30 UTCMay 18, 15:40 UTC10m
2026-05-18 FD608 DMK → PNH May 18, 14:10 UTCMay 18, 14:25 UTC15m
2026-05-18 FD608 DMK → PNH May 18, 12:05 UTCMay 18, 12:25 UTC20m
2026-05-18 FD608 DMK → PNH May 18, 10:25 UTCMay 18, 10:30 UTC5m
2026-05-18 FD608 DMK → PNH May 18, 09:10 UTCMay 18, 09:55 UTC45m
2026-05-18 FD608 DMK → PNH May 18, 07:30 UTCMay 18, 08:10 UTC40m
2026-05-18 FD608 DMK → PNH May 18, 03:45 UTCMay 18, 04:00 UTC15m
2026-05-17 FD608 DMK → PNH May 17, 09:15 UTCMay 17, 09:25 UTC10m
2026-05-17 FD608 DMK → PNH May 17, 07:10 UTCMay 17, 07:25 UTC15m
2026-05-17 FD608 DMK → PNH May 17, 06:30 UTCMay 17, 06:40 UTC10m
2026-05-17 FD608 DMK → PNH May 17, 02:30 UTCMay 17, 02:50 UTC20m
2026-05-16 FD608 DMK → PNH May 16, 19:00 UTCMay 16, 19:05 UTC5m
2026-05-16 FD608 DMK → PNH May 16, 17:10 UTCMay 16, 17:20 UTC10m
2026-05-16 FD608 DMK → PNH May 16, 16:20 UTCMay 16, 16:35 UTC15m
2026-05-16 FD608 DMK → PNH May 16, 14:11 UTCMay 16, 14:51 UTC40m
2026-05-16 FD608 DMK → PNH May 16, 12:31 UTCMay 16, 13:01 UTC30m
2026-05-16 FD608 DMK → PNH May 16, 11:41 UTCMay 16, 11:51 UTC10m
2026-05-16 FD608 DMK → PNH May 16, 08:31 UTCMay 16, 09:51 UTC1h 20m
2026-05-16 FD608 DMK → PNH May 16, 06:31 UTCMay 16, 07:05 UTC35m
2026-05-16 FD608 DMK → PNH May 16, 03:50 UTCMay 16, 03:55 UTC5m
2026-05-15 FD608 DMK → PNH May 15, 08:40 UTCMay 15, 08:45 UTC5m
2026-05-15 FD608 DMK → PNH May 15, 06:10 UTCMay 15, 06:50 UTC40m
2026-05-15 FD608 DMK → PNH May 15, 04:15 UTCMay 15, 04:55 UTC40m
2026-05-15 FD608 DMK → PNH May 15, 03:25 UTCMay 15, 03:40 UTC15m
2026-05-14 FD608 DMK → PNH May 14, 05:50 UTCMay 14, 07:05 UTC1h 15m
2026-05-14 FD608 DMK → PNH May 14, 03:10 UTCMay 14, 03:50 UTC40m
2026-05-14 FD608 DMK → PNH May 14, 02:15 UTCMay 14, 02:35 UTC20m
2026-05-13 FD608 DMK → PNH May 13, 16:30 UTCMay 13, 17:45 UTC1h 15m
2026-05-13 FD608 DMK → PNH May 13, 15:10 UTCMay 13, 15:40 UTC30m
2026-05-13 FD608 DMK → PNH May 13, 11:15 UTCMay 13, 11:20 UTC5m
2026-05-13 FD608 DMK → PNH May 13, 03:55 UTCMay 13, 05:15 UTC1h 20m
2026-05-13 FD608 DMK → PNH May 13, 01:20 UTCMay 13, 01:55 UTC35m
2026-05-13 FD608 DMK → PNH May 13, 00:00 UTCMay 13, 00:10 UTC10m
2026-05-12 FD608 DMK → PNH May 12, 19:35 UTCMay 12, 19:40 UTC5m
2026-05-12 FD608 DMK → PNH May 12, 18:45 UTCMay 12, 18:55 UTC10m
2026-05-12 VHOWJ - May 12, 14:30 UTCMay 12, 14:50 UTC20m
2026-05-12 FD608 DMK → PNH May 12, 05:05 UTCMay 12, 05:15 UTC10m
2026-05-12 FD608 DMK → PNH May 12, 03:05 UTCMay 12, 03:20 UTC15m
2026-05-04 FD608 DMK → PNH May 4, 11:30 UTCMay 4, 11:40 UTC10m
2026-05-04 FD608 DMK → PNH May 4, 09:05 UTCMay 4, 10:20 UTC1h 15m

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

Mode-S 7C4A01 frequently asked

What is Mode-S code 7C4A01?
7C4A01 is an ICAO 24-bit transponder address. Allocated to Australia. Assigned to VH-OWJ.
Where is Mode-S 7C4A01 registered?
Mode-S code 7C4A01 is allocated to Australia (AU). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 7C4A01 broadcasting right now?
No active broadcast right now. Last signal was 10d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 7C4A01, octal 37045001, decimal 8,145,409.
What flights does 7C4A01 operate?
Mode-S 7C4A01 has broadcast 2 distinct callsigns, including FD608, VHOWJ.