Apparatus

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sensors Mode-S transponder

7C65DF

ICAO 24-bit transponder address · allocated to Australia

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

Hex
7C65DF
Octal
37062737
Decimal
8,152,543
Country
AU
Tail
VH-UEP
Type
DA40
No current signal · last broadcast 1d ago
Flights observed
88
Distinct callsigns
20
Country
AU
Last broadcast
1d ago

Last known position

Most recent position reported by Mode-S 7C65DF.

Country allocation

The ICAO 24-bit address 7C65DF 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 20 distinct

Callsign Airline Flights Last seen
ASTR344 - 19 2026-07-10
ASTR332 - 15 2026-06-21
ASTR325 - 6 2026-07-11
ASTR341 - 5 2026-07-13
ASTR328 - 5 2026-07-13
ASTR327 - 5 2026-06-15
ASTR306 - 5 2026-05-02
ASTR342 - 4 2026-07-08
ASTR338 - 3 2026-07-08
ASTR329 - 3 2026-07-09
ASTR303 - 3 2026-07-12
ASTR900 - 2 2026-07-10
ASTR340 - 2 2026-06-21
ASTR321 - 2 2026-06-24
ASTR312 - 2 2026-07-12
ASTR305 - 2 2026-07-09
ASTR351 - 1 2026-04-24
ASTR333 - 1 2026-07-11
ASTR323 - 1 2026-07-11
ASTR316 - 1 2026-05-30

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-17 ASTR310 - Jul 17, 03:20 UTCJul 17, 04:20 UTC1h 0m
2026-07-13 ASTR341 BWU → XRH Jul 13, 06:35 UTCJul 13, 06:50 UTC15m
2026-07-13 ASTR341 - Jul 13, 05:55 UTCJul 13, 06:15 UTC20m
2026-07-13 ASTR328 - Jul 13, 04:20 UTCJul 13, 05:05 UTC45m
2026-07-12 ASTR303 - Jul 12, 23:15 UTCJul 13, 00:15 UTC1h 0m
2026-07-12 ASTR328 - Jul 12, 05:30 UTCJul 12, 06:35 UTC1h 5m
2026-07-12 ASTR312 - Jul 12, 04:25 UTCJul 12, 04:50 UTC25m
2026-07-12 ASTR312 XRH → BWU Jul 12, 03:35 UTCJul 12, 04:15 UTC40m
2026-07-12 ASTR303 - Jul 12, 01:50 UTCJul 12, 02:55 UTC1h 5m
2026-07-11 ASTR325 - Jul 11, 23:45 UTCJul 12, 00:20 UTC35m
2026-07-11 ASTR328 XRH → XRH Jul 11, 06:25 UTCJul 11, 07:25 UTC1h 0m
2026-07-11 ASTR323 - Jul 11, 03:50 UTCJul 11, 04:40 UTC50m
2026-07-11 ASTR333 - Jul 11, 02:10 UTCJul 11, 03:01 UTC50m
2026-07-10 ASTR325 - Jul 10, 05:50 UTCJul 10, 06:45 UTC55m
2026-07-10 ASTR344 - Jul 10, 04:45 UTCJul 10, 05:05 UTC20m
2026-07-10 ASTR344 XRH → BWU Jul 10, 03:55 UTCJul 10, 04:15 UTC20m
2026-07-10 ASTR325 - Jul 10, 01:55 UTCJul 10, 02:40 UTC45m
2026-07-10 ASTR900 - Jul 10, 00:20 UTCJul 10, 01:10 UTC50m
2026-07-09 ASTR329 XRH → XRH Jul 9, 04:50 UTCJul 9, 05:45 UTC55m
2026-07-09 ASTR344 BWU → XRH Jul 9, 03:15 UTCJul 9, 03:35 UTC20m
2026-07-09 ASTR305 - Jul 9, 02:20 UTCJul 9, 02:40 UTC20m
2026-07-08 ASTR338 - Jul 8, 23:55 UTCJul 9, 00:50 UTC55m
2026-07-08 ASTR342 - Jul 8, 06:30 UTCJul 8, 06:50 UTC20m
2026-07-08 ASTR342 - Jul 8, 05:35 UTCJul 8, 05:55 UTC20m
2026-07-08 ASTR900 - Jul 8, 03:35 UTCJul 8, 04:15 UTC40m
2026-07-08 ASTR338 - Jul 8, 01:45 UTCJul 8, 02:30 UTC45m
2026-07-07 ASTR338 - Jul 7, 23:45 UTCJul 8, 00:40 UTC55m
2026-07-07 ASTR328 - Jul 7, 05:00 UTCJul 7, 05:35 UTC35m
2026-07-07 ASTR328 - Jul 7, 02:25 UTCJul 7, 03:05 UTC40m
2026-07-07 ASTR344 - Jul 7, 00:40 UTCJul 7, 01:05 UTC25m
2026-07-06 ASTR341 XRH → BWU Jul 6, 23:35 UTCJul 7, 00:00 UTC25m
2026-06-24 ASTR321 XRH → XRH Jun 24, 04:30 UTCJun 24, 04:55 UTC25m
2026-06-24 ASTR321 XRH → XRH Jun 24, 00:40 UTCJun 24, 02:20 UTC1h 40m
2026-06-21 ASTR340 BWU → XRH Jun 21, 05:54 UTCJun 21, 06:10 UTC15m
2026-06-21 ASTR340 XRH → BWU Jun 21, 04:49 UTCJun 21, 05:10 UTC20m
2026-06-21 ASTR332 - Jun 21, 03:40 UTCJun 21, 03:59 UTC20m
2026-06-21 ASTR332 XRH → XRH Jun 21, 03:05 UTCJun 21, 03:19 UTC15m
2026-06-21 ASTR332 XRH → XRH Jun 21, 01:35 UTCJun 21, 01:55 UTC20m
2026-06-21 ASTR332 - Jun 21, 00:59 UTCJun 21, 01:14 UTC15m
2026-06-21 ASTR332 - Jun 21, 00:29 UTCJun 21, 00:45 UTC15m
2026-06-20 ASTR332 XRH → XRH Jun 20, 23:50 UTCJun 21, 00:10 UTC20m
2026-06-20 ASTR344 - Jun 20, 05:14 UTCJun 20, 05:34 UTC20m
2026-06-20 ASTR344 - Jun 20, 04:29 UTCJun 20, 04:49 UTC20m
2026-06-20 ASTR344 - Jun 20, 03:39 UTCJun 20, 03:54 UTC15m
2026-06-20 ASTR344 XRH → XRH Jun 20, 02:54 UTCJun 20, 03:09 UTC15m
2026-06-20 ASTR344 - Jun 20, 01:39 UTCJun 20, 01:55 UTC15m
2026-06-20 ASTR344 - Jun 20, 00:49 UTCJun 20, 01:05 UTC15m
2026-06-19 ASTR344 XRH → XRH Jun 19, 23:59 UTCJun 20, 00:14 UTC15m
2026-06-15 ASTR327 XRH → XRH Jun 15, 06:35 UTCJun 15, 07:15 UTC40m
2026-06-06 ASTR344 BWU → XRH Jun 6, 07:10 UTCJun 6, 07:30 UTC20m

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

Mode-S 7C65DF frequently asked

What is Mode-S code 7C65DF?
7C65DF is an ICAO 24-bit transponder address. Allocated to Australia. Assigned to VH-UEP.
Where is Mode-S 7C65DF registered?
Mode-S code 7C65DF is allocated to Australia (AU). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 7C65DF 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 7C65DF, octal 37062737, decimal 8,152,543.
What flights does 7C65DF operate?
Mode-S 7C65DF has broadcast 20 distinct callsigns, including ASTR344, ASTR332, ASTR325, ASTR341, ASTR328.