Apparatus

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sensors Mode-S transponder

7C7AEF

ICAO 24-bit transponder address · allocated to Australia

Currently assigned to VH-YKH · DIAMOND DA-40 Club Star · operated by FLIGHT TRAINING ADELAIDE PTY LTD

Hex
7C7AEF
Octal
37075357
Decimal
8,157,935
Country
AU
Tail
VH-YKH
Type
DA40
No current signal · last broadcast 5d ago
Flights observed
48
Distinct callsigns
1
Country
AU
Last broadcast
5d ago

Last known position

Most recent position reported by Mode-S 7C7AEF.

Country allocation

The ICAO 24-bit address 7C7AEF 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
YKH - 48 2026-05-28

Recent flights last 48

DateFlightRouteTakeoffLandingDuration
2026-05-28 YKH - May 28, 04:25 UTCMay 28, 05:30 UTC1h 5m
2026-05-28 YKH - May 28, 00:00 UTCMay 28, 01:20 UTC1h 20m
2026-05-26 YKH - May 26, 04:54 UTCMay 26, 05:15 UTC20m
2026-05-26 YKH - May 26, 02:19 UTCMay 26, 02:35 UTC15m
2026-05-26 YKH - May 26, 00:04 UTCMay 26, 01:00 UTC55m
2026-05-25 YKH - May 25, 22:40 UTCMay 25, 23:04 UTC25m
2026-04-29 YKH - Apr 29, 03:15 UTCApr 29, 04:39 UTC1h 25m
2026-04-29 YKH - Apr 29, 01:25 UTCApr 29, 02:15 UTC50m
2026-04-28 YKH - Apr 28, 21:40 UTCApr 29, 00:25 UTC2h 45m
2026-04-28 YKH - Apr 28, 09:25 UTCApr 28, 11:05 UTC1h 40m
2026-04-28 YKH - Apr 28, 05:45 UTCApr 28, 06:20 UTC35m
2026-04-28 YKH - Apr 28, 04:20 UTCApr 28, 04:55 UTC35m
2026-04-28 YKH - Apr 28, 02:25 UTCApr 28, 03:25 UTC1h 0m
2026-04-28 YKH - Apr 28, 00:10 UTCApr 28, 01:30 UTC1h 20m
2026-04-27 YKH - Apr 27, 06:45 UTCApr 27, 07:40 UTC55m
2026-04-27 YKH - Apr 27, 03:50 UTCApr 27, 05:00 UTC1h 10m
2026-04-27 YKH - Apr 27, 00:45 UTCApr 27, 01:55 UTC1h 10m
2026-04-25 YKH - Apr 25, 00:35 UTCApr 25, 00:55 UTC20m
2026-04-24 YKH - Apr 24, 21:55 UTCApr 24, 22:15 UTC20m
2026-04-23 YKH - Apr 23, 05:10 UTCApr 23, 06:10 UTC1h 0m
2026-04-23 YKH - Apr 23, 01:55 UTCApr 23, 04:25 UTC2h 30m
2026-04-22 YKH - Apr 22, 22:10 UTCApr 23, 00:35 UTC2h 25m
2026-04-22 YKH - Apr 22, 07:10 UTCApr 22, 07:20 UTC10m
2026-04-22 YKH - Apr 22, 04:15 UTCApr 22, 04:50 UTC35m
2026-04-22 YKH - Apr 22, 03:20 UTCApr 22, 03:30 UTC10m
2026-04-22 YKH - Apr 22, 01:15 UTCApr 22, 01:30 UTC15m
2026-04-21 YKH - Apr 21, 22:55 UTCApr 21, 23:50 UTC55m
2026-04-21 YKH - Apr 21, 07:15 UTCApr 21, 07:55 UTC40m
2026-04-21 YKH - Apr 21, 03:40 UTCApr 21, 05:35 UTC1h 55m
2026-04-21 YKH - Apr 21, 02:10 UTCApr 21, 02:50 UTC40m
2026-04-21 YKH - Apr 21, 00:25 UTCApr 21, 00:50 UTC25m
2026-04-20 YKH - Apr 20, 22:20 UTCApr 20, 23:00 UTC40m
2026-04-20 YKH - Apr 20, 04:50 UTCApr 20, 06:05 UTC1h 15m
2026-04-20 YKH - Apr 20, 03:10 UTCApr 20, 04:10 UTC1h 0m
2026-04-18 YKH - Apr 18, 01:25 UTCApr 18, 02:55 UTC1h 30m
2026-04-18 YKH - Apr 18, 00:40 UTCApr 18, 01:20 UTC40m
2026-04-16 YKH - Apr 16, 07:09 UTCApr 16, 07:39 UTC30m
2026-04-16 YKH - Apr 16, 06:05 UTCApr 16, 07:05 UTC1h 0m
2026-04-16 YKH - Apr 16, 03:09 UTCApr 16, 04:49 UTC1h 40m
2026-04-16 YKH - Apr 16, 02:45 UTCApr 16, 03:04 UTC20m
2026-04-16 YKH - Apr 16, 01:10 UTCApr 16, 01:55 UTC45m
2026-04-15 YKH - Apr 15, 23:15 UTCApr 16, 01:05 UTC1h 50m
2026-04-15 YKH - Apr 15, 05:00 UTCApr 15, 06:15 UTC1h 15m
2026-04-15 YKH - Apr 15, 04:10 UTCApr 15, 04:50 UTC40m
2026-04-15 YKH - Apr 15, 02:55 UTCApr 15, 03:15 UTC20m
2026-04-15 YKH - Apr 15, 01:10 UTCApr 15, 01:40 UTC30m
2026-04-14 YKH - Apr 14, 22:55 UTCApr 14, 23:40 UTC45m
2026-04-14 YKH - Apr 14, 05:15 UTCApr 14, 05:45 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-YKH page for operator, model, and routing details .

Mode-S 7C7AEF frequently asked

What is Mode-S code 7C7AEF?
7C7AEF is an ICAO 24-bit transponder address. Allocated to Australia. Assigned to VH-YKH.
Where is Mode-S 7C7AEF registered?
Mode-S code 7C7AEF is allocated to Australia (AU). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 7C7AEF broadcasting right now?
No active broadcast right now. Last signal was 5d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 7C7AEF, octal 37075357, decimal 8,157,935.
What flights does 7C7AEF operate?
Mode-S 7C7AEF has broadcast 1 distinct callsign, including YKH.