Apparatus

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sensors Mode-S transponder

7C252C

ICAO 24-bit transponder address · allocated to Australia

Currently assigned to VH-HMM · PIPER PA-30 Twin Comanche · operated by WHITE STAR AVIATION PTY LTD

Hex
7C252C
Octal
37022454
Decimal
8,135,980
Country
AU
Tail
VH-HMM
Type
PA30
No current signal · last broadcast 4d ago
Flights observed
19
Distinct callsigns
1
Country
AU
Last broadcast
4d ago

Last known position

Most recent position reported by Mode-S 7C252C.

Country allocation

The ICAO 24-bit address 7C252C 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
HMM - 19 2026-07-10

Recent flights last 19

DateFlightRouteTakeoffLandingDuration
2026-07-10 HMM - Jul 10, 02:15 UTCJul 10, 02:55 UTC40m
2026-06-25 HMM - Jun 25, 02:35 UTCJun 25, 03:20 UTC45m
2026-06-24 HMM - Jun 24, 09:00 UTCJun 24, 09:29 UTC30m
2026-06-23 HMM - Jun 23, 22:40 UTCJun 23, 23:10 UTC30m
2026-06-23 HMM - Jun 23, 01:30 UTCJun 23, 01:54 UTC25m
2026-06-22 HMM - Jun 22, 05:20 UTCJun 22, 05:54 UTC35m
2026-06-11 HMM BNK → BNK Jun 11, 02:30 UTCJun 11, 03:25 UTC55m
2026-06-09 HMM BNK → BNK Jun 9, 23:35 UTCJun 10, 00:35 UTC1h 0m
2026-06-09 HMM BNK → BNK Jun 9, 02:15 UTCJun 9, 03:15 UTC1h 0m
2026-06-08 HMM - Jun 8, 03:25 UTCJun 8, 05:55 UTC2h 30m
2026-06-08 HMM BNK → BNK Jun 8, 00:45 UTCJun 8, 02:10 UTC1h 25m
2026-06-07 HMM BNK → BNK Jun 7, 23:15 UTCJun 8, 00:00 UTC45m
2026-06-05 HMM BNK → BNK Jun 5, 06:00 UTCJun 5, 07:00 UTC1h 0m
2026-06-02 HMM BNK → BNK Jun 2, 00:30 UTCJun 2, 01:15 UTC45m
2026-06-01 HMM BNK → BNK Jun 1, 23:20 UTCJun 2, 00:00 UTC40m
2026-05-31 HMM BNK → BNK May 31, 23:15 UTCJun 1, 00:30 UTC1h 15m
2026-05-28 HMM BNK → BNK May 28, 23:05 UTCMay 29, 00:00 UTC55m
2026-05-28 HMM BNK → BNK May 28, 05:30 UTCMay 28, 05:55 UTC25m
2026-05-16 HMM - May 16, 02:45 UTCMay 16, 03:00 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-HMM page for operator, model, and routing details .

Mode-S 7C252C frequently asked

What is Mode-S code 7C252C?
7C252C is an ICAO 24-bit transponder address. Allocated to Australia. Assigned to VH-HMM.
Where is Mode-S 7C252C registered?
Mode-S code 7C252C is allocated to Australia (AU). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 7C252C broadcasting right now?
No active broadcast right now. Last signal was 4d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 7C252C, octal 37022454, decimal 8,135,980.
What flights does 7C252C operate?
Mode-S 7C252C has broadcast 1 distinct callsign, including HMM.