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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 7h ago
Flights observed
121
Distinct callsigns
1
Country
AU
Last broadcast
7h ago

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 - 120 2026-07-14

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
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
2026-06-24 OXJ MBW → MBW Jun 24, 05:05 UTCJun 24, 06:04 UTC1h 0m
2026-06-23 OXJ MBW → MBW Jun 23, 04:39 UTCJun 23, 06:34 UTC1h 55m
2026-06-22 OXJ MBW → MBW Jun 22, 23:35 UTCJun 23, 01:59 UTC2h 25m
2026-06-22 OXJ MBW → MBW Jun 22, 07:40 UTCJun 22, 09:45 UTC2h 5m
2026-06-22 OXJ MBW → MBW Jun 22, 03:05 UTCJun 22, 03:19 UTC15m
2026-06-21 OXJ MBW → MBW Jun 21, 05:40 UTCJun 21, 06:40 UTC1h 0m
2026-06-21 OXJ MBW → MBW Jun 21, 01:25 UTCJun 21, 03:34 UTC2h 10m
2026-06-19 OXJ MBW → MBW Jun 19, 04:44 UTCJun 19, 05:40 UTC55m
2026-06-19 OXJ MBW → MBW Jun 19, 01:29 UTCJun 19, 02:19 UTC50m
2026-06-16 OXJ MBW → MBW Jun 16, 04:05 UTCJun 16, 04:55 UTC50m
2026-06-14 OXJ MBW → MBW Jun 14, 07:25 UTCJun 14, 09:15 UTC1h 50m
2026-06-14 OXJ - Jun 14, 01:45 UTCJun 14, 03:00 UTC1h 15m
2026-06-14 OXJ - Jun 14, 00:50 UTCJun 14, 01:10 UTC20m
2026-06-14 OXJ MBW → MEB Jun 14, 00:30 UTCJun 14, 00:40 UTC10m
2026-06-13 OXJ MBW → MBW Jun 13, 03:50 UTCJun 13, 05:10 UTC1h 20m
2026-06-12 OXJ - Jun 12, 05:25 UTCJun 12, 07:40 UTC2h 15m
2026-06-12 OXJ MBW → MBW Jun 12, 03:45 UTCJun 12, 04:55 UTC1h 10m
2026-06-11 OXJ MBW → MBW Jun 11, 22:10 UTCJun 11, 23:25 UTC1h 15m
2026-06-11 OXJ MBW → MBW Jun 11, 04:20 UTCJun 11, 06:10 UTC1h 50m
2026-06-11 OXJ MBW → MBW Jun 11, 01:45 UTCJun 11, 03:00 UTC1h 15m
2026-06-10 OXJ MBW → MBW Jun 10, 01:45 UTCJun 10, 02:55 UTC1h 10m
2026-06-09 OXJ MBW → MBW Jun 9, 23:25 UTCJun 10, 00:25 UTC1h 0m
2026-06-09 OXJ MBW → MBW Jun 9, 04:05 UTCJun 9, 05:15 UTC1h 10m
2026-06-05 OXJ MBW → MBW Jun 5, 08:00 UTCJun 5, 10:20 UTC2h 20m

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 7h ago.
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.