Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

7C2539

ICAO 24-bit transponder address · allocated to Australia

Currently assigned to VH-HMZ · CESSNA 441 Conquest · operated by PRIORITY SHARK BAY PTY LTD

Hex
7C2539
Octal
37022471
Decimal
8,135,993
Country
AU
Tail
VH-HMZ
Type
C441
No current signal · last broadcast 7h ago
Flights observed
143
Distinct callsigns
1
Country
AU
Last broadcast
7h ago

Last known position

Most recent position reported by Mode-S 7C2539.

Country allocation

The ICAO 24-bit address 7C2539 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
HMZ - 143 2026-07-14

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 HMZ - Jul 14, 06:50 UTCJul 14, 07:25 UTC35m
2026-07-13 HMZ - Jul 13, 22:45 UTCJul 13, 23:30 UTC45m
2026-07-08 HMZ - Jul 8, 08:35 UTCJul 8, 09:05 UTC30m
2026-07-07 HMZ - Jul 7, 22:50 UTCJul 7, 23:25 UTC35m
2026-07-06 HMZ - Jul 6, 01:25 UTCJul 6, 02:00 UTC35m
2026-07-05 HMZ - Jul 5, 23:00 UTCJul 5, 23:45 UTC45m
2026-07-02 HMZ - Jul 2, 07:40 UTCJul 2, 08:35 UTC55m
2026-07-01 HMZ - Jul 1, 22:45 UTCJul 1, 23:30 UTC45m
2026-07-01 HMZ - Jul 1, 03:15 UTCJul 1, 03:55 UTC40m
2026-07-01 HMZ - Jul 1, 00:10 UTCJul 1, 00:45 UTC35m
2026-06-29 HMZ - Jun 29, 07:25 UTCJun 29, 07:59 UTC35m
2026-06-28 HMZ - Jun 28, 23:04 UTCJun 28, 23:44 UTC40m
2026-06-24 HMZ - Jun 24, 07:50 UTCJun 24, 08:30 UTC40m
2026-06-24 HMZ - Jun 24, 05:20 UTCJun 24, 06:04 UTC45m
2026-06-24 HMZ - Jun 24, 00:30 UTCJun 24, 01:09 UTC40m
2026-06-23 HMZ - Jun 23, 22:15 UTCJun 23, 23:00 UTC45m
2026-06-19 HMZ - Jun 19, 01:15 UTCJun 19, 02:04 UTC50m
2026-06-18 HMZ - Jun 18, 06:50 UTCJun 18, 07:45 UTC55m
2026-06-18 HMZ - Jun 18, 05:05 UTCJun 18, 05:50 UTC45m
2026-06-18 HMZ - Jun 18, 02:45 UTCJun 18, 03:25 UTC40m
2026-06-18 HMZ - Jun 18, 01:10 UTCJun 18, 01:45 UTC35m
2026-06-17 HMZ - Jun 17, 22:55 UTCJun 17, 23:35 UTC40m
2026-06-17 HMZ - Jun 17, 04:55 UTCJun 17, 05:35 UTC40m
2026-06-17 HMZ - Jun 17, 02:35 UTCJun 17, 03:15 UTC40m
2026-06-17 HMZ - Jun 17, 01:20 UTCJun 17, 02:00 UTC40m
2026-06-16 HMZ - Jun 16, 23:05 UTCJun 16, 23:50 UTC45m
2026-06-16 HMZ - Jun 16, 10:40 UTCJun 16, 11:25 UTC45m
2026-06-16 HMZ - Jun 16, 07:45 UTCJun 16, 08:25 UTC40m
2026-06-16 HMZ - Jun 16, 04:50 UTCJun 16, 05:30 UTC40m
2026-06-16 HMZ - Jun 16, 02:34 UTCJun 16, 03:20 UTC45m
2026-06-16 HMZ - Jun 16, 01:04 UTCJun 16, 01:50 UTC45m
2026-06-15 HMZ - Jun 15, 22:49 UTCJun 15, 23:25 UTC35m
2026-06-15 HMZ BQB → JAD Jun 15, 11:05 UTCJun 15, 11:45 UTC40m
2026-06-15 HMZ JAD → BQB Jun 15, 09:10 UTCJun 15, 09:40 UTC30m
2026-06-15 HMZ JAD → JAD Jun 15, 03:05 UTCJun 15, 06:04 UTC3h 0m
2026-06-15 HMZ - Jun 15, 01:35 UTCJun 15, 02:15 UTC40m
2026-06-14 HMZ - Jun 14, 23:20 UTCJun 15, 00:05 UTC45m
2026-06-11 HMZ - Jun 11, 01:50 UTCJun 11, 02:30 UTC40m
2026-06-10 HMZ - Jun 10, 23:20 UTCJun 11, 00:10 UTC50m
2026-06-10 HMZ - Jun 10, 02:10 UTCJun 10, 02:45 UTC35m
2026-06-09 HMZ - Jun 9, 23:55 UTCJun 10, 00:40 UTC45m
2026-06-06 HMZ - Jun 6, 00:05 UTCJun 6, 00:45 UTC40m
2026-06-05 HMZ - Jun 5, 22:30 UTCJun 5, 23:10 UTC40m
2026-06-04 HMZ - Jun 4, 05:00 UTCJun 4, 05:35 UTC35m
2026-06-04 HMZ - Jun 4, 02:40 UTCJun 4, 03:20 UTC40m
2026-06-04 HMZ - Jun 4, 00:55 UTCJun 4, 01:30 UTC35m
2026-06-03 HMZ - Jun 3, 22:40 UTCJun 3, 23:20 UTC40m
2026-06-03 HMZ - Jun 3, 01:10 UTCJun 3, 01:45 UTC35m
2026-06-02 HMZ - Jun 2, 22:50 UTCJun 2, 23:30 UTC40m
2026-06-02 HMZ - Jun 2, 04:40 UTCJun 2, 05:30 UTC50m

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

Mode-S 7C2539 frequently asked

What is Mode-S code 7C2539?
7C2539 is an ICAO 24-bit transponder address. Allocated to Australia. Assigned to VH-HMZ.
Where is Mode-S 7C2539 registered?
Mode-S code 7C2539 is allocated to Australia (AU). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 7C2539 broadcasting right now?
No active broadcast right now. Last signal was 7h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 7C2539, octal 37022471, decimal 8,135,993.
What flights does 7C2539 operate?
Mode-S 7C2539 has broadcast 1 distinct callsign, including HMZ.