Apparatus

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sensors Mode-S transponder

7C65DE

ICAO 24-bit transponder address · allocated to Australia

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

Hex
7C65DE
Octal
37062736
Decimal
8,152,542
Country
AU
Tail
VH-UEO
Type
DA40
No current signal · last broadcast 9d ago
Flights observed
106
Distinct callsigns
17
Country
AU
Last broadcast
9d ago

Last known position

Most recent position reported by Mode-S 7C65DE.

Country allocation

The ICAO 24-bit address 7C65DE 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 17 distinct

Callsign Airline Flights Last seen
ASTR332 - 22 2026-06-20
ASTR303 - 15 2026-06-21
ASTR316 - 14 2026-06-27
ASTR340 - 11 2026-05-30
ASTR341 - 8 2026-05-23
ASTR320 - 7 2026-06-06
ASTR328 - 6 2026-06-20
ASTR325 - 6 2026-06-08
ASTR327 - 4 2026-07-09
ASTR305 - 4 2026-06-06
ASTR338 - 3 2026-07-07
ASTR900 - 1 2026-05-24
ASTR344 - 1 2026-05-30
ASTR335 - 1 2026-07-09
ASTR329 - 1 2026-06-08
ASTR321 - 1 2026-04-24
ASTR312 - 1 2026-04-24

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-09 ASTR335 - Jul 9, 05:20 UTCJul 9, 05:40 UTC20m
2026-07-09 ASTR327 - Jul 9, 02:10 UTCJul 9, 02:30 UTC20m
2026-07-07 ASTR338 - Jul 7, 03:10 UTCJul 7, 03:50 UTC40m
2026-07-07 ASTR338 - Jul 7, 00:40 UTCJul 7, 01:20 UTC40m
2026-07-04 ASTR338 - Jul 4, 04:20 UTCJul 4, 04:45 UTC25m
2026-06-27 ASTR316 BWU → XRH Jun 27, 02:29 UTCJun 27, 02:50 UTC20m
2026-06-21 ASTR316 XRH → BWU Jun 21, 05:49 UTCJun 21, 06:10 UTC20m
2026-06-21 ASTR303 - Jun 21, 04:24 UTCJun 21, 04:44 UTC20m
2026-06-21 ASTR303 - Jun 21, 03:30 UTCJun 21, 03:49 UTC20m
2026-06-21 ASTR303 XRH → XRH Jun 21, 02:35 UTCJun 21, 03:05 UTC30m
2026-06-21 ASTR303 - Jun 21, 01:25 UTCJun 21, 01:49 UTC25m
2026-06-21 ASTR303 - Jun 21, 00:29 UTCJun 21, 00:55 UTC25m
2026-06-20 ASTR303 XRH → XRH Jun 20, 23:45 UTCJun 21, 00:04 UTC20m
2026-06-20 ASTR332 - Jun 20, 06:54 UTCJun 20, 07:19 UTC25m
2026-06-20 ASTR332 - Jun 20, 06:05 UTCJun 20, 06:19 UTC15m
2026-06-20 ASTR328 XRH → XRH Jun 20, 05:14 UTCJun 20, 05:34 UTC20m
2026-06-20 ASTR328 - Jun 20, 04:34 UTCJun 20, 04:49 UTC15m
2026-06-20 ASTR328 XRH → XRH Jun 20, 03:49 UTCJun 20, 04:09 UTC20m
2026-06-20 ASTR328 - Jun 20, 02:49 UTCJun 20, 03:04 UTC15m
2026-06-20 ASTR328 - Jun 20, 02:09 UTCJun 20, 02:24 UTC15m
2026-06-20 ASTR328 XRH → XRH Jun 20, 01:34 UTCJun 20, 01:50 UTC15m
2026-06-08 ASTR329 XRH → XRH Jun 8, 06:10 UTCJun 8, 06:40 UTC30m
2026-06-08 ASTR325 - Jun 8, 04:10 UTCJun 8, 05:05 UTC55m
2026-06-08 ASTR332 XRH → BWU Jun 8, 03:15 UTCJun 8, 03:30 UTC15m
2026-06-08 ASTR332 XRH → XRH Jun 8, 01:40 UTCJun 8, 02:15 UTC35m
2026-06-07 ASTR332 BWU → XRH Jun 7, 05:40 UTCJun 7, 06:00 UTC20m
2026-06-07 ASTR332 XRH → BWU Jun 7, 04:55 UTCJun 7, 05:10 UTC15m
2026-06-07 ASTR325 - Jun 7, 03:55 UTCJun 7, 04:25 UTC30m
2026-06-07 ASTR325 XRH → XRH Jun 7, 03:05 UTCJun 7, 03:45 UTC40m
2026-06-07 ASTR332 - Jun 7, 01:30 UTCJun 7, 01:50 UTC20m
2026-06-07 ASTR332 XRH → XRH Jun 7, 00:55 UTCJun 7, 01:15 UTC20m
2026-06-07 ASTR332 - Jun 7, 00:25 UTCJun 7, 00:39 UTC15m
2026-06-06 ASTR332 XRH → XRH Jun 6, 23:44 UTCJun 7, 00:00 UTC15m
2026-06-06 ASTR305 BWU → XRH Jun 6, 07:10 UTCJun 6, 07:25 UTC15m
2026-06-06 ASTR305 XRH → BWU Jun 6, 06:10 UTCJun 6, 06:25 UTC15m
2026-06-06 ASTR320 - Jun 6, 04:45 UTCJun 6, 05:00 UTC15m
2026-06-06 ASTR320 XRH → XRH Jun 6, 04:00 UTCJun 6, 04:15 UTC15m
2026-06-06 ASTR320 - Jun 6, 03:25 UTCJun 6, 03:40 UTC15m
2026-06-06 ASTR320 XRH → XRH Jun 6, 02:45 UTCJun 6, 03:00 UTC15m
2026-06-06 ASTR320 - Jun 6, 01:05 UTCJun 6, 01:20 UTC15m
2026-06-06 ASTR320 - Jun 6, 00:20 UTCJun 6, 00:30 UTC10m
2026-06-05 ASTR320 XRH → XRH Jun 5, 23:30 UTCJun 5, 23:45 UTC15m
2026-05-30 ASTR332 - May 30, 07:05 UTCMay 30, 07:20 UTC15m
2026-05-30 ASTR332 XRH → BWU May 30, 06:20 UTCMay 30, 06:35 UTC15m
2026-05-30 ASTR305 XRH → XRH May 30, 05:30 UTCMay 30, 06:05 UTC35m
2026-05-30 ASTR340 XRH → XRH May 30, 04:20 UTCMay 30, 05:10 UTC50m
2026-05-30 ASTR344 XRH → XRH May 30, 03:15 UTCMay 30, 03:55 UTC40m
2026-05-24 ASTR332 XRH → XRH May 24, 07:00 UTCMay 24, 07:20 UTC20m
2026-05-24 ASTR332 BWU → XRH May 24, 06:30 UTCMay 24, 06:45 UTC15m
2026-05-24 ASTR332 XRH → BWU May 24, 05:30 UTCMay 24, 05:45 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-UEO page for operator, model, and routing details .

Mode-S 7C65DE frequently asked

What is Mode-S code 7C65DE?
7C65DE is an ICAO 24-bit transponder address. Allocated to Australia. Assigned to VH-UEO.
Where is Mode-S 7C65DE registered?
Mode-S code 7C65DE is allocated to Australia (AU). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 7C65DE broadcasting right now?
No active broadcast right now. Last signal was 9d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 7C65DE, octal 37062736, decimal 8,152,542.
What flights does 7C65DE operate?
Mode-S 7C65DE has broadcast 17 distinct callsigns, including ASTR332, ASTR303, ASTR316, ASTR340, ASTR341.