Apparatus

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sensors Mode-S transponder

7C65D9

ICAO 24-bit transponder address · allocated to Australia

Currently assigned to VH-UEJ · DIAMOND DA-40 Club Star · operated by AIRFLITE PTY LTD

Hex
7C65D9
Octal
37062731
Decimal
8,152,537
Country
AU
Tail
VH-UEJ
Type
DA40
No current signal · last broadcast 3d ago
Flights observed
48
Distinct callsigns
11
Country
AU
Last broadcast
3d ago

Last known position

Most recent position reported by Mode-S 7C65D9.

Country allocation

The ICAO 24-bit address 7C65D9 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 11 distinct

Callsign Airline Flights Last seen
ASTR327 - 16 2026-05-31
ASTR332 - 10 2026-05-17
ASTR338 - 4 2026-05-15
ASTR900 - 3 2026-05-23
ASTR344 - 3 2026-05-24
ASTR333 - 3 2026-05-30
ASTR312 - 3 2026-05-16
ASTR350 - 2 2026-04-17
ASTR340 - 2 2026-05-24
ASTR316 - 1 2026-04-17
ASTR303 - 1 2026-05-22

Recent flights last 48

DateFlightRouteTakeoffLandingDuration
2026-05-31 ASTR327 - May 31, 00:15 UTCMay 31, 00:45 UTC30m
2026-05-30 ASTR327 - May 30, 22:40 UTCMay 30, 23:05 UTC25m
2026-05-30 ASTR333 XRH → XRH May 30, 06:00 UTCMay 30, 06:55 UTC55m
2026-05-30 ASTR333 XRH → XRH May 30, 04:25 UTCMay 30, 05:15 UTC50m
2026-05-30 ASTR333 XRH → XRH May 30, 02:40 UTCMay 30, 03:10 UTC30m
2026-05-24 ASTR340 - May 24, 06:45 UTCMay 24, 07:00 UTC15m
2026-05-24 ASTR340 XRH → BWU May 24, 05:35 UTCMay 24, 05:50 UTC15m
2026-05-24 ASTR344 XRH → XRH May 24, 03:40 UTCMay 24, 04:45 UTC1h 5m
2026-05-24 ASTR327 XRH → XRH May 24, 02:45 UTCMay 24, 03:05 UTC20m
2026-05-24 ASTR327 - May 24, 02:10 UTCMay 24, 02:25 UTC15m
2026-05-24 ASTR327 - May 24, 01:35 UTCMay 24, 01:50 UTC15m
2026-05-24 ASTR327 - May 24, 01:00 UTCMay 24, 01:15 UTC15m
2026-05-24 ASTR327 XRH → XRH May 24, 00:20 UTCMay 24, 00:40 UTC20m
2026-05-23 ASTR900 XRH → XRH May 23, 04:40 UTCMay 23, 04:50 UTC10m
2026-05-23 ASTR900 XRH → XRH May 23, 03:25 UTCMay 23, 03:40 UTC15m
2026-05-23 ASTR327 - May 23, 02:30 UTCMay 23, 02:45 UTC15m
2026-05-23 ASTR327 - May 23, 01:50 UTCMay 23, 02:05 UTC15m
2026-05-23 ASTR327 - May 23, 01:10 UTCMay 23, 01:25 UTC15m
2026-05-23 ASTR327 XRH → XRH May 23, 00:30 UTCMay 23, 00:50 UTC20m
2026-05-22 ASTR327 XRH → XRH May 22, 23:55 UTCMay 23, 00:15 UTC20m
2026-05-22 ASTR327 XRH → XRH May 22, 23:20 UTCMay 22, 23:35 UTC15m
2026-05-22 ASTR327 BWU → XRH May 22, 21:50 UTCMay 22, 22:05 UTC15m
2026-05-22 ASTR327 XRH → BWU May 22, 21:15 UTCMay 22, 21:30 UTC15m
2026-05-22 ASTR900 XRH → XRH May 22, 05:15 UTCMay 22, 06:30 UTC1h 15m
2026-05-22 ASTR303 XRH → XRH May 22, 00:10 UTCMay 22, 01:05 UTC55m
2026-05-17 ASTR332 - May 17, 07:15 UTCMay 17, 07:25 UTC10m
2026-05-17 ASTR332 - May 17, 06:55 UTCMay 17, 07:05 UTC10m
2026-05-17 ASTR332 - May 17, 06:20 UTCMay 17, 06:35 UTC15m
2026-05-17 ASTR332 - May 17, 05:50 UTCMay 17, 06:05 UTC15m
2026-05-17 ASTR332 - May 17, 05:15 UTCMay 17, 05:30 UTC15m
2026-05-17 ASTR332 - May 17, 04:45 UTCMay 17, 05:00 UTC15m
2026-05-17 ASTR332 XRH → XRH May 17, 04:10 UTCMay 17, 04:30 UTC20m
2026-05-17 ASTR332 XRH → XRH May 17, 03:40 UTCMay 17, 03:55 UTC15m
2026-05-16 ASTR332 XRH → XRH May 16, 06:50 UTCMay 16, 07:11 UTC20m
2026-05-16 ASTR344 - May 16, 06:10 UTCMay 16, 06:31 UTC20m
2026-05-16 ASTR344 XRH → BWU May 16, 05:15 UTCMay 16, 05:35 UTC20m
2026-05-16 ASTR312 - May 16, 04:25 UTCMay 16, 04:45 UTC20m
2026-05-16 ASTR312 - May 16, 03:35 UTCMay 16, 03:50 UTC15m
2026-05-16 ASTR312 XRH → XRH May 16, 02:50 UTCMay 16, 03:05 UTC15m
2026-05-15 ASTR338 XRH → XRH May 15, 06:00 UTCMay 15, 06:50 UTC50m
2026-05-15 ASTR338 XRH → XRH May 15, 03:35 UTCMay 15, 04:45 UTC1h 10m
2026-05-15 ASTR338 XRH → XRH May 15, 00:35 UTCMay 15, 01:35 UTC1h 0m
2026-05-10 ASTR327 - May 10, 05:20 UTCMay 10, 05:50 UTC30m
2026-05-08 ASTR332 - May 8, 03:30 UTCMay 8, 04:04 UTC35m
2026-05-08 ASTR338 XRH → XRH May 8, 02:49 UTCMay 8, 03:09 UTC20m
2026-04-17 ASTR316 - Apr 17, 06:15 UTCApr 17, 06:30 UTC15m
2026-04-17 ASTR350 XRH → BWU Apr 17, 05:35 UTCApr 17, 05:55 UTC20m
2026-04-17 ASTR350 BWU → XRH Apr 17, 04:55 UTCApr 17, 05:10 UTC15m

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

Mode-S 7C65D9 frequently asked

What is Mode-S code 7C65D9?
7C65D9 is an ICAO 24-bit transponder address. Allocated to Australia. Assigned to VH-UEJ.
Where is Mode-S 7C65D9 registered?
Mode-S code 7C65D9 is allocated to Australia (AU). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 7C65D9 broadcasting right now?
No active broadcast right now. Last signal was 3d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 7C65D9, octal 37062731, decimal 8,152,537.
What flights does 7C65D9 operate?
Mode-S 7C65D9 has broadcast 11 distinct callsigns, including ASTR327, ASTR332, ASTR338, ASTR900, ASTR344.