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sensors Mode-S transponder

7C4EC9

ICAO 24-bit transponder address · allocated to Australia

Currently assigned to VH-PUJ · CESSNA 172 Skyhawk · operated by MAJOR BLUE AIR PTY LTD

Hex
7C4EC9
Octal
37047311
Decimal
8,146,633
Country
AU
Tail
VH-PUJ
Type
C172
No current signal · last broadcast 6h ago
Flights observed
91
Distinct callsigns
1
Country
AU
Last broadcast
6h ago

Last known position

Most recent position reported by Mode-S 7C4EC9.

Country allocation

The ICAO 24-bit address 7C4EC9 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
PUJ - 91 2026-07-14

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 PUJ JAD → JAD Jul 14, 05:35 UTCJul 14, 06:45 UTC1h 10m
2026-07-11 PUJ - Jul 11, 04:40 UTCJul 11, 05:35 UTC55m
2026-07-11 PUJ - Jul 11, 03:15 UTCJul 11, 03:35 UTC20m
2026-07-10 PUJ - Jul 10, 08:15 UTCJul 10, 09:15 UTC1h 0m
2026-07-10 PUJ - Jul 10, 04:00 UTCJul 10, 05:15 UTC1h 15m
2026-07-08 PUJ - Jul 8, 04:10 UTCJul 8, 05:25 UTC1h 15m
2026-07-08 PUJ JAD → JAD Jul 8, 02:30 UTCJul 8, 03:15 UTC45m
2026-07-07 PUJ JAD → JAD Jul 7, 02:45 UTCJul 7, 03:45 UTC1h 0m
2026-07-04 PUJ JAD → JAD Jul 4, 05:50 UTCJul 4, 06:25 UTC35m
2026-07-04 PUJ JAD → JAD Jul 4, 03:20 UTCJul 4, 04:00 UTC40m
2026-07-04 PUJ - Jul 4, 01:25 UTCJul 4, 01:55 UTC30m
2026-07-04 PUJ JAD → JAD Jul 4, 00:40 UTCJul 4, 01:10 UTC30m
2026-07-02 PUJ JAD → JAD Jul 2, 23:30 UTCJul 3, 00:10 UTC40m
2026-07-02 PUJ JAD → JAD Jul 2, 03:25 UTCJul 2, 04:05 UTC40m
2026-07-01 PUJ - Jul 1, 03:25 UTCJul 1, 04:05 UTC40m
2026-07-01 PUJ - Jul 1, 01:55 UTCJul 1, 02:15 UTC20m
2026-06-29 PUJ JAD → JAD Jun 29, 06:14 UTCJun 29, 07:05 UTC50m
2026-06-29 PUJ JAD → JAD Jun 29, 04:30 UTCJun 29, 05:15 UTC45m
2026-06-29 PUJ JAD → JAD Jun 29, 02:20 UTCJun 29, 02:54 UTC35m
2026-06-24 PUJ JAD → JAD Jun 24, 04:59 UTCJun 24, 07:50 UTC2h 50m
2026-06-24 PUJ - Jun 24, 02:24 UTCJun 24, 02:49 UTC25m
2026-06-24 PUJ JAD → JAD Jun 24, 00:49 UTCJun 24, 01:34 UTC45m
2026-06-23 PUJ JAD → JAD Jun 23, 06:09 UTCJun 23, 08:15 UTC2h 5m
2026-06-23 PUJ JAD → JAD Jun 23, 03:49 UTCJun 23, 04:39 UTC50m
2026-06-22 PUJ JAD → JAD Jun 22, 05:04 UTCJun 22, 06:00 UTC55m
2026-06-22 PUJ JAD → JAD Jun 22, 02:10 UTCJun 22, 02:54 UTC45m
2026-06-17 PUJ - Jun 17, 08:35 UTCJun 17, 09:00 UTC25m
2026-06-17 PUJ JAD → JAD Jun 17, 07:35 UTCJun 17, 08:25 UTC50m
2026-06-16 PUJ JAD → JAD Jun 16, 05:50 UTCJun 16, 06:20 UTC30m
2026-06-16 PUJ JAD → JAD Jun 16, 01:55 UTCJun 16, 04:25 UTC2h 30m
2026-06-15 PUJ JAD → JAD Jun 15, 05:20 UTCJun 15, 05:25 UTC5m
2026-06-13 PUJ JAD → JAD Jun 13, 01:45 UTCJun 13, 03:55 UTC2h 10m
2026-06-10 PUJ JAD → JAD Jun 10, 05:25 UTCJun 10, 06:20 UTC55m
2026-06-10 PUJ JAD → JAD Jun 10, 03:35 UTCJun 10, 04:20 UTC45m
2026-06-10 PUJ JAD → JAD Jun 10, 00:45 UTCJun 10, 01:25 UTC40m
2026-06-09 PUJ JAD → JAD Jun 9, 08:20 UTCJun 9, 09:10 UTC50m
2026-06-09 PUJ - Jun 9, 06:50 UTCJun 9, 07:45 UTC55m
2026-06-09 PUJ JAD → JAD Jun 9, 05:20 UTCJun 9, 06:05 UTC45m
2026-06-06 PUJ JAD → JAD Jun 6, 05:55 UTCJun 6, 06:35 UTC40m
2026-06-06 PUJ JAD → JAD Jun 6, 03:40 UTCJun 6, 04:20 UTC40m
2026-06-06 PUJ JAD → JAD Jun 6, 01:25 UTCJun 6, 01:50 UTC25m
2026-06-06 PUJ JAD → JAD Jun 6, 00:50 UTCJun 6, 01:05 UTC15m
2026-06-05 PUJ - Jun 5, 09:00 UTCJun 5, 09:25 UTC25m
2026-06-05 PUJ - Jun 5, 06:45 UTCJun 5, 08:05 UTC1h 20m
2026-06-05 PUJ JAD → JAD Jun 5, 02:50 UTCJun 5, 03:30 UTC40m
2026-06-04 PUJ JAD → JAD Jun 4, 06:20 UTCJun 4, 07:00 UTC40m
2026-06-04 PUJ JAD → JAD Jun 4, 03:40 UTCJun 4, 04:05 UTC25m
2026-06-04 PUJ JAD → JAD Jun 4, 00:20 UTCJun 4, 00:55 UTC35m
2026-06-03 PUJ - Jun 3, 07:25 UTCJun 3, 07:55 UTC30m
2026-06-03 PUJ - Jun 3, 06:15 UTCJun 3, 06:55 UTC40m

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

Mode-S 7C4EC9 frequently asked

What is Mode-S code 7C4EC9?
7C4EC9 is an ICAO 24-bit transponder address. Allocated to Australia. Assigned to VH-PUJ.
Where is Mode-S 7C4EC9 registered?
Mode-S code 7C4EC9 is allocated to Australia (AU). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 7C4EC9 broadcasting right now?
No active broadcast right now. Last signal was 6h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 7C4EC9, octal 37047311, decimal 8,146,633.
What flights does 7C4EC9 operate?
Mode-S 7C4EC9 has broadcast 1 distinct callsign, including PUJ.