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sensors Mode-S transponder

7C4A25

ICAO 24-bit transponder address · allocated to Australia

Currently assigned to VH-OXJ · PIPER PA-44 Seminole · operated by OXFORD AVIATION ACADEMY (AUSTRALIA) PTY LTD

Hex
7C4A25
Octal
37045045
Decimal
8,145,445
Country
AU
Tail
VH-OXJ
Type
PA44
No current signal · last broadcast Jul 26, 04:55 UTC
Flights observed
145
Distinct callsigns
1
Country
AU
Last broadcast
Jul 26, 04:55 UTC

Last known position

Most recent position reported by Mode-S 7C4A25.

Country allocation

The ICAO 24-bit address 7C4A25 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
OXJ - 144 2026-07-26

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 OXJ MBW → MBW Jul 26, 03:20 UTCJul 26, 04:55 UTC1h 35m
2026-07-24 OXJ - Jul 24, 04:00 UTCJul 24, 04:35 UTC35m
2026-07-24 OXJ - Jul 24, 02:20 UTCJul 24, 03:20 UTC1h 0m
2026-07-23 OXJ MBW → MBW Jul 23, 08:10 UTCJul 23, 10:30 UTC2h 20m
2026-07-23 OXJ - Jul 23, 06:05 UTCJul 23, 06:45 UTC40m
2026-07-23 OXJ - Jul 23, 04:20 UTCJul 23, 04:55 UTC35m
2026-07-23 OXJ MBW → MEB Jul 23, 04:00 UTCJul 23, 04:10 UTC10m
2026-07-22 OXJ - Jul 22, 04:30 UTCJul 22, 05:25 UTC55m
2026-07-22 OXJ - Jul 22, 03:10 UTCJul 22, 03:55 UTC45m
2026-07-22 OXJ MBW → MBW Jul 22, 01:00 UTCJul 22, 02:00 UTC1h 0m
2026-07-21 OXJ MBW → MBW Jul 21, 22:45 UTCJul 21, 23:40 UTC55m
2026-07-21 OXJ - Jul 21, 06:20 UTCJul 21, 07:20 UTC1h 0m
2026-07-21 OXJ - Jul 21, 00:35 UTCJul 21, 01:30 UTC55m
2026-07-20 OXJ MBW → MBW Jul 20, 05:10 UTCJul 20, 06:30 UTC1h 20m
2026-07-18 OXJ MBW → MBW Jul 18, 23:50 UTCJul 19, 00:55 UTC1h 5m
2026-07-18 OXJ - Jul 18, 04:10 UTCJul 18, 05:10 UTC1h 0m
2026-07-18 OXJ - Jul 18, 02:50 UTCJul 18, 03:25 UTC35m
2026-07-18 OXJ MBW → MEB Jul 18, 02:35 UTCJul 18, 02:45 UTC10m
2026-07-17 OXJ MBW → MBW Jul 17, 04:54 UTCJul 17, 06:50 UTC1h 55m
2026-07-17 OXJ MBW → MBW Jul 17, 02:30 UTCJul 17, 03:39 UTC1h 10m
2026-07-15 OXJ MEB → MBW Jul 15, 05:05 UTCJul 15, 07:10 UTC2h 5m
2026-07-15 OXJ MBW → MEB Jul 15, 04:45 UTCJul 15, 05:00 UTC15m
2026-07-15 OXJ - Jul 15, 02:30 UTCJul 15, 02:35 UTC5m
2026-07-15 OXJ MBW → MBW Jul 15, 01:55 UTCJul 15, 02:25 UTC30m
2026-07-14 OXJ MBW → MBW Jul 14, 06:55 UTCJul 14, 09:15 UTC2h 20m
2026-07-12 OXJ MBW → MBW Jul 12, 23:05 UTCJul 12, 23:55 UTC50m
2026-07-12 OXJ MBW → MBW Jul 12, 02:05 UTCJul 12, 02:35 UTC30m
2026-07-10 OXJ - Jul 10, 00:25 UTCJul 10, 02:45 UTC2h 20m
2026-07-10 OXJ MBW → MEB Jul 10, 00:00 UTCJul 10, 00:10 UTC10m
2026-07-09 OXJ MBW → MBW Jul 9, 05:25 UTCJul 9, 07:55 UTC2h 30m
2026-07-09 OXJ MBW → MBW Jul 9, 02:20 UTCJul 9, 04:10 UTC1h 50m
2026-07-08 OXJ MBW → MBW Jul 8, 04:00 UTCJul 8, 04:40 UTC40m
2026-07-07 OXJ MBW → MBW Jul 7, 03:40 UTCJul 7, 04:55 UTC1h 15m
2026-07-06 OXJ MBW → MBW Jul 6, 05:00 UTCJul 6, 05:50 UTC50m
2026-07-06 OXJ MBW → MBW Jul 6, 02:20 UTCJul 6, 03:40 UTC1h 20m
2026-07-01 OXJ MBW → MBW Jul 1, 02:20 UTCJul 1, 02:45 UTC25m
2026-07-01 OXJ MBW → MBW Jul 1, 00:10 UTCJul 1, 01:15 UTC1h 5m
2026-06-29 OXJ - Jun 29, 09:14 UTCJun 29, 10:24 UTC1h 10m
2026-06-29 OXJ MBW → MBW Jun 29, 08:09 UTCJun 29, 09:10 UTC1h 0m
2026-06-28 OXJ MBW → MBW Jun 28, 07:20 UTCJun 28, 09:30 UTC2h 10m
2026-06-28 OXJ MBW → MBW Jun 28, 02:05 UTCJun 28, 04:35 UTC2h 30m
2026-06-27 OXJ MEB → MBW Jun 27, 07:15 UTCJun 27, 07:30 UTC15m
2026-06-27 OXJ MBW → MEB Jun 27, 04:34 UTCJun 27, 07:04 UTC2h 30m
2026-06-26 OXJ - Jun 26, 05:19 UTCJun 26, 05:55 UTC35m
2026-06-26 OXJ - Jun 26, 03:29 UTCJun 26, 03:54 UTC25m
2026-06-26 OXJ MBW → MEB Jun 26, 03:05 UTCJun 26, 03:15 UTC10m
2026-06-25 OXJ MBW → MBW Jun 25, 23:19 UTCJun 26, 01:34 UTC2h 15m
2026-06-25 OXJ MBW → MBW Jun 25, 05:55 UTCJun 25, 06:55 UTC1h 0m
2026-06-25 OXJ MBW → MBW Jun 25, 00:14 UTCJun 25, 02:19 UTC2h 5m
2026-06-24 OXJ MBW → MBW Jun 24, 07:40 UTCJun 24, 09:49 UTC2h 10m

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

Mode-S 7C4A25 frequently asked

What is Mode-S code 7C4A25?
7C4A25 is an ICAO 24-bit transponder address. Allocated to Australia. Assigned to VH-OXJ.
Where is Mode-S 7C4A25 registered?
Mode-S code 7C4A25 is allocated to Australia (AU). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 7C4A25 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 04:55 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 7C4A25, octal 37045045, decimal 8,145,445.
What flights does 7C4A25 operate?
Mode-S 7C4A25 has broadcast 1 distinct callsign, including OXJ.