Apparatus

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sensors Mode-S transponder

7C4A0F

ICAO 24-bit transponder address · allocated to Australia

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

Hex
7C4A0F
Octal
37045017
Decimal
8,145,423
Country
AU
Tail
VH-OWX
Type
PC12
No current signal · last broadcast 1d ago
Flights observed
13
Distinct callsigns
1
Country
AU
Last broadcast
1d ago

Last known position

Most recent position reported by Mode-S 7C4A0F.

Country allocation

The ICAO 24-bit address 7C4A0F 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 1 distinct

Callsign Airline Flights Last seen
FD618 Thai AirAsia 13 2026-04-13

Recent flights last 13

DateFlightRouteTakeoffLandingDuration
2026-04-13 FD618 DMK → SAI Apr 13, 19:50 UTCApr 13, 20:10 UTC20m
2026-04-13 FD618 DMK → SAI Apr 13, 19:35 UTCApr 13, 20:10 UTC35m
2026-04-13 FD618 DMK → SAI Apr 13, 16:40 UTCApr 13, 17:15 UTC35m
2026-04-13 FD618 DMK → SAI Apr 13, 14:40 UTCApr 13, 15:25 UTC45m
2026-04-13 FD618 DMK → SAI Apr 13, 12:35 UTCApr 13, 13:20 UTC45m
2026-04-13 FD618 DMK → SAI Apr 13, 07:55 UTCApr 13, 08:00 UTC5m
2026-04-13 FD618 DMK → SAI Apr 13, 07:10 UTCApr 13, 08:00 UTC50m
2026-04-13 FD618 DMK → SAI Apr 13, 05:05 UTCApr 13, 06:00 UTC55m
2026-04-13 FD618 DMK → SAI Apr 13, 03:55 UTCApr 13, 04:10 UTC15m
2026-04-13 FD618 DMK → SAI Apr 13, 03:30 UTCApr 13, 04:10 UTC40m
2026-04-13 FD618 DMK → SAI Apr 13, 00:25 UTCApr 13, 01:15 UTC50m
2026-04-12 FD618 DMK → SAI Apr 12, 18:40 UTCApr 12, 19:15 UTC35m
2026-04-12 FD618 DMK → SAI Apr 12, 17:15 UTCApr 12, 17:45 UTC30m

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

Mode-S 7C4A0F frequently asked

What is Mode-S code 7C4A0F?
7C4A0F is an ICAO 24-bit transponder address. Allocated to Australia. Assigned to VH-OWX.
Where is Mode-S 7C4A0F registered?
Mode-S code 7C4A0F is allocated to Australia (AU). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 7C4A0F broadcasting right now?
No active broadcast right now. Last signal was 1d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 7C4A0F, octal 37045017, decimal 8,145,423.
What flights does 7C4A0F operate?
Mode-S 7C4A0F has broadcast 1 distinct callsign, including FD618.