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 5d ago
Flights observed
91
Distinct callsigns
19
Country
AU
Last broadcast
5d 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 19 distinct

Callsign Airline Flights Last seen
ASTR327 - 20 2026-07-02
ASTR332 - 16 2026-06-21
ASTR323 - 9 2026-07-13
ASTR340 - 7 2026-06-07
ASTR312 - 6 2026-06-06
ASTR328 - 5 2026-06-21
ASTR338 - 4 2026-05-15
ASTR900 - 3 2026-05-23
ASTR344 - 3 2026-05-24
ASTR333 - 3 2026-05-30
ASTR350 - 2 2026-04-17
ASTR335 - 2 2026-07-11
ASTR325 - 2 2026-06-08
ASTR303 - 2 2026-07-11
ASTR215 - 2 2026-07-04
ASTR205 - 2 2026-07-03
ASTR904 - 1 2026-07-03
ASTR355 - 1 2026-07-13
ASTR316 - 1 2026-04-17

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-13 ASTR323 - Jul 13, 03:45 UTCJul 13, 04:05 UTC20m
2026-07-13 ASTR323 - Jul 13, 01:20 UTCJul 13, 02:10 UTC50m
2026-07-13 ASTR355 - Jul 13, 00:20 UTCJul 13, 00:30 UTC10m
2026-07-12 ASTR323 - Jul 12, 23:05 UTCJul 12, 23:50 UTC45m
2026-07-12 ASTR323 - Jul 12, 07:01 UTCJul 12, 07:15 UTC15m
2026-07-12 ASTR323 XRH → BWU Jul 12, 05:50 UTCJul 12, 06:10 UTC20m
2026-07-12 ASTR323 - Jul 12, 04:01 UTCJul 12, 05:01 UTC1h 0m
2026-07-12 ASTR323 - Jul 12, 01:15 UTCJul 12, 01:50 UTC35m
2026-07-11 ASTR323 - Jul 11, 23:05 UTCJul 11, 23:35 UTC30m
2026-07-11 ASTR323 - Jul 11, 06:50 UTCJul 11, 07:20 UTC30m
2026-07-11 ASTR303 - Jul 11, 05:01 UTCJul 11, 05:31 UTC30m
2026-07-11 ASTR335 BWU → XRH Jul 11, 04:01 UTCJul 11, 04:15 UTC15m
2026-07-10 ASTR335 - Jul 10, 23:50 UTCJul 11, 03:10 UTC3h 20m
2026-07-04 ASTR215 - Jul 4, 04:10 UTCJul 4, 05:10 UTC1h 0m
2026-07-04 ASTR215 - Jul 4, 01:15 UTCJul 4, 01:55 UTC40m
2026-07-03 ASTR904 - Jul 3, 22:50 UTCJul 3, 23:50 UTC1h 0m
2026-07-03 ASTR205 - Jul 3, 01:10 UTCJul 3, 01:50 UTC40m
2026-07-02 ASTR205 - Jul 2, 23:50 UTCJul 3, 00:20 UTC30m
2026-07-02 ASTR327 - Jul 2, 03:25 UTCJul 2, 03:35 UTC10m
2026-07-01 ASTR327 - Jul 1, 23:25 UTCJul 2, 02:45 UTC3h 20m
2026-06-21 ASTR332 - Jun 21, 06:40 UTCJun 21, 06:55 UTC15m
2026-06-21 ASTR327 XRH → BWU Jun 21, 05:49 UTCJun 21, 06:10 UTC20m
2026-06-21 ASTR328 - Jun 21, 04:04 UTCJun 21, 04:30 UTC25m
2026-06-21 ASTR328 XRH → XRH Jun 21, 03:14 UTCJun 21, 03:40 UTC25m
2026-06-21 ASTR328 - Jun 21, 01:35 UTCJun 21, 02:04 UTC30m
2026-06-21 ASTR328 - Jun 21, 00:40 UTCJun 21, 01:05 UTC25m
2026-06-20 ASTR328 XRH → XRH Jun 20, 23:50 UTCJun 21, 00:14 UTC25m
2026-06-20 ASTR327 BWU → XRH Jun 20, 06:54 UTCJun 20, 07:14 UTC20m
2026-06-08 ASTR325 XRH → BWU Jun 8, 03:15 UTCJun 8, 03:30 UTC15m
2026-06-08 ASTR325 XRH → XRH Jun 8, 01:15 UTCJun 8, 02:05 UTC50m
2026-06-07 ASTR340 - Jun 7, 04:00 UTCJun 7, 04:15 UTC15m
2026-06-07 ASTR340 XRH → XRH Jun 7, 03:15 UTCJun 7, 03:30 UTC15m
2026-06-07 ASTR340 XRH → XRH Jun 7, 01:09 UTCJun 7, 01:30 UTC20m
2026-06-07 ASTR340 - Jun 7, 00:34 UTCJun 7, 00:55 UTC20m
2026-06-06 ASTR340 XRH → XRH Jun 6, 23:55 UTCJun 7, 00:10 UTC15m
2026-06-06 ASTR332 BWU → XRH Jun 6, 07:05 UTCJun 6, 07:20 UTC15m
2026-06-06 ASTR332 XRH → BWU Jun 6, 06:05 UTCJun 6, 06:20 UTC15m
2026-06-06 ASTR332 - Jun 6, 05:00 UTCJun 6, 05:15 UTC15m
2026-06-06 ASTR332 - Jun 6, 04:20 UTCJun 6, 04:40 UTC20m
2026-06-06 ASTR332 XRH → XRH Jun 6, 03:40 UTCJun 6, 04:00 UTC20m
2026-06-06 ASTR312 XRH → XRH Jun 6, 03:00 UTCJun 6, 03:15 UTC15m
2026-06-06 ASTR312 XRH → XRH Jun 6, 01:15 UTCJun 6, 01:35 UTC20m
2026-06-06 ASTR312 XRH → XRH Jun 6, 00:25 UTCJun 6, 00:45 UTC20m
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

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 5d 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 19 distinct callsigns, including ASTR327, ASTR332, ASTR323, ASTR340, ASTR312.