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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 11h ago
Flights observed
62
Distinct callsigns
1
Country
AU
Last broadcast
11h 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 - 61 2026-05-29

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-05-29 OXJ MBW → MBW May 29, 23:40 UTCMay 30, 01:00 UTC1h 20m
2026-05-29 OXJ MBW → MBW May 29, 07:55 UTCMay 29, 08:25 UTC30m
2026-05-29 OXJ MBW → MBW May 29, 05:45 UTCMay 29, 06:30 UTC45m
2026-05-29 OXJ MBW → MBW May 29, 04:00 UTCMay 29, 04:40 UTC40m
2026-05-29 OXJ MBW → MBW May 29, 01:25 UTCMay 29, 02:25 UTC1h 0m
2026-05-29 OXJ - May 29, 01:05 UTCMay 29, 01:15 UTC10m
2026-05-28 OXJ MBW → MBW May 28, 22:55 UTCMay 29, 00:20 UTC1h 25m
2026-05-28 OXJ MBW → MBW May 28, 08:55 UTCMay 28, 09:10 UTC15m
2026-05-28 OXJ MBW → MBW May 28, 08:10 UTCMay 28, 08:50 UTC40m
2026-05-26 OXJ MBW → MBW May 26, 08:04 UTCMay 26, 08:59 UTC55m
2026-05-25 OXJ MBW → MBW May 25, 05:25 UTCMay 25, 06:40 UTC1h 15m
2026-05-24 OXJ MBW → MBW May 24, 00:00 UTCMay 24, 00:55 UTC55m
2026-05-22 OXJ MBW → MBW May 22, 22:05 UTCMay 23, 00:00 UTC1h 55m
2026-05-22 OXJ MBW → MBW May 22, 04:15 UTCMay 22, 05:20 UTC1h 5m
2026-05-22 OXJ MBW → MBW May 22, 00:55 UTCMay 22, 01:45 UTC50m
2026-05-21 OXJ MBW → MBW May 21, 01:00 UTCMay 21, 03:20 UTC2h 20m
2026-05-20 OXJ MBW → MBW May 20, 05:50 UTCMay 20, 06:50 UTC1h 0m
2026-05-19 OXJ MBW → MBW May 19, 08:20 UTCMay 19, 09:55 UTC1h 35m
2026-05-19 OXJ MBW → MBW May 19, 01:05 UTCMay 19, 03:15 UTC2h 10m
2026-05-14 OXJ - May 14, 10:05 UTCMay 14, 10:40 UTC35m
2026-05-14 OXJ - May 14, 08:50 UTCMay 14, 09:20 UTC30m
2026-05-14 OXJ - May 14, 05:35 UTCMay 14, 06:10 UTC35m
2026-05-14 OXJ - May 14, 04:25 UTCMay 14, 05:05 UTC40m
2026-05-14 OXJ MBW → MBW May 14, 01:30 UTCMay 14, 02:35 UTC1h 5m
2026-05-13 OXJ MBW → MBW May 13, 23:40 UTCMay 14, 00:45 UTC1h 5m
2026-05-13 OXJ MBW → MBW May 13, 04:45 UTCMay 13, 06:00 UTC1h 15m
2026-05-13 OXJ MBW → MBW May 13, 02:40 UTCMay 13, 03:30 UTC50m
2026-05-12 OXJ MBW → MBW May 12, 06:55 UTCMay 12, 08:05 UTC1h 10m
2026-05-12 OXJ - May 12, 02:45 UTCMay 12, 03:15 UTC30m
2026-05-11 OXJ MBW → MBW May 11, 07:50 UTCMay 11, 09:55 UTC2h 5m
2026-05-11 OXJ MBW → MBW May 11, 04:40 UTCMay 11, 05:25 UTC45m
2026-05-11 OXJ MBW → MBW May 11, 02:25 UTCMay 11, 03:25 UTC1h 0m
2026-05-09 OXJ MBW → MBW May 9, 03:30 UTCMay 9, 05:55 UTC2h 25m
2026-05-05 OXJ - May 5, 05:10 UTCMay 5, 05:25 UTC15m
2026-05-05 OXJ - May 5, 04:00 UTCMay 5, 04:15 UTC15m
2026-05-01 OXJ - May 1, 06:00 UTCMay 1, 06:10 UTC10m
2026-05-01 OXJ - May 1, 05:25 UTCMay 1, 05:55 UTC30m
2026-05-01 OXJ - May 1, 03:30 UTCMay 1, 04:50 UTC1h 20m
2026-04-30 OXJ MBW → MBW Apr 30, 01:50 UTCApr 30, 02:35 UTC45m
2026-04-29 OXJ MBW → MBW Apr 29, 23:05 UTCApr 29, 23:50 UTC45m
2026-04-29 OXJ MBW → MBW Apr 29, 07:10 UTCApr 29, 07:35 UTC25m
2026-04-29 OXJ - Apr 29, 04:34 UTCApr 29, 05:00 UTC25m
2026-04-29 OXJ - Apr 29, 03:10 UTCApr 29, 03:34 UTC25m
2026-04-29 OXJ MBW → MEB Apr 29, 02:45 UTCApr 29, 03:04 UTC20m
2026-04-28 - - Apr 28, 07:30 UTCApr 28, 07:40 UTC10m
2026-04-24 OXJ MBW → MBW Apr 24, 08:55 UTCApr 24, 11:00 UTC2h 5m
2026-04-24 OXJ - Apr 24, 02:05 UTCApr 24, 02:55 UTC50m
2026-04-24 OXJ - Apr 24, 01:00 UTCApr 24, 01:30 UTC30m
2026-04-24 OXJ MBW → MEB Apr 24, 00:40 UTCApr 24, 00:55 UTC15m
2026-04-23 OXJ MBW → MBW Apr 23, 06:50 UTCApr 23, 07:45 UTC55m

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 11h 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.