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sensors Mode-S transponder

7C4A28

ICAO 24-bit transponder address · allocated to Australia

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

Hex
7C4A28
Octal
37045050
Decimal
8,145,448
Country
AU
Tail
VH-OXM
Type
PA44
No current signal · last broadcast 9h ago
Flights observed
123
Distinct callsigns
1
Country
AU
Last broadcast
9h ago

Last known position

Most recent position reported by Mode-S 7C4A28.

Country allocation

The ICAO 24-bit address 7C4A28 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
OXM - 123 2026-07-14

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 OXM MBW → MBW Jul 14, 08:40 UTCJul 14, 10:50 UTC2h 10m
2026-07-14 OXM MBW → MBW Jul 14, 08:05 UTCJul 14, 08:35 UTC30m
2026-07-14 OXM MBW → MBW Jul 14, 05:20 UTCJul 14, 06:10 UTC50m
2026-07-13 OXM MBW → MBW Jul 13, 05:10 UTCJul 13, 06:15 UTC1h 5m
2026-07-13 OXM - Jul 13, 02:15 UTCJul 13, 04:10 UTC1h 55m
2026-07-13 OXM MBW → MEB Jul 13, 01:55 UTCJul 13, 02:10 UTC15m
2026-07-10 OXM MBW → MBW Jul 10, 04:50 UTCJul 10, 06:40 UTC1h 50m
2026-07-09 OXM MBW → MBW Jul 9, 23:25 UTCJul 10, 00:05 UTC40m
2026-07-09 OXM - Jul 9, 07:15 UTCJul 9, 08:00 UTC45m
2026-07-09 OXM - Jul 9, 04:20 UTCJul 9, 05:20 UTC1h 0m
2026-07-09 OXM MBW → MBW Jul 9, 02:25 UTCJul 9, 03:15 UTC50m
2026-07-08 OXM MBW → MBW Jul 8, 07:45 UTCJul 8, 09:55 UTC2h 10m
2026-07-08 OXM MBW → MBW Jul 8, 06:15 UTCJul 8, 06:40 UTC25m
2026-07-08 OXM MBW → MBW Jul 8, 00:20 UTCJul 8, 01:20 UTC1h 0m
2026-07-07 OXM MBW → MBW Jul 7, 06:00 UTCJul 7, 07:00 UTC1h 0m
2026-07-06 OXM MBW → MBW Jul 6, 03:00 UTCJul 6, 05:20 UTC2h 20m
2026-07-05 OXM - Jul 5, 23:30 UTCJul 6, 01:25 UTC1h 55m
2026-07-05 OXM MBW → MEB Jul 5, 23:15 UTCJul 5, 23:25 UTC10m
2026-07-05 OXM MBW → MBW Jul 5, 04:10 UTCJul 5, 05:15 UTC1h 5m
2026-07-05 OXM MEB → MBW Jul 5, 00:40 UTCJul 5, 02:35 UTC1h 55m
2026-07-05 OXM MBW → MEB Jul 5, 00:15 UTCJul 5, 00:35 UTC20m
2026-07-04 OXM MBW → MBW Jul 4, 03:35 UTCJul 4, 04:35 UTC1h 0m
2026-07-03 OXM MBW → MBW Jul 3, 23:50 UTCJul 4, 00:40 UTC50m
2026-07-03 OXM - Jul 3, 05:25 UTCJul 3, 06:15 UTC50m
2026-07-02 OXM - Jul 2, 23:40 UTCJul 3, 00:30 UTC50m
2026-07-01 OXM MBW → MBW Jul 1, 09:40 UTCJul 1, 11:10 UTC1h 30m
2026-07-01 OXM MBW → MBW Jul 1, 07:50 UTCJul 1, 09:00 UTC1h 10m
2026-07-01 OXM MBW → MBW Jul 1, 05:05 UTCJul 1, 06:05 UTC1h 0m
2026-07-01 OXM MBW → MBW Jul 1, 02:40 UTCJul 1, 03:50 UTC1h 10m
2026-06-30 OXM MBW → MBW Jun 30, 23:25 UTCJul 1, 01:25 UTC2h 0m
2026-06-28 OXM MBW → MBW Jun 28, 21:59 UTCJun 28, 22:39 UTC40m
2026-06-27 OXM MBW → MBW Jun 27, 00:44 UTCJun 27, 02:20 UTC1h 35m
2026-06-26 OXM MBW → MBW Jun 26, 03:45 UTCJun 26, 04:34 UTC50m
2026-06-25 OXM MBW → MBW Jun 25, 06:09 UTCJun 25, 07:05 UTC55m
2026-06-24 OXM MBW → MBW Jun 24, 06:04 UTCJun 24, 07:05 UTC1h 0m
2026-06-23 OXM MBW → MBW Jun 23, 04:50 UTCJun 23, 05:45 UTC55m
2026-06-23 OXM MBW → MBW Jun 23, 02:09 UTCJun 23, 03:09 UTC1h 0m
2026-06-22 OXM MBW → MBW Jun 22, 23:10 UTCJun 23, 00:04 UTC55m
2026-06-22 OXM - Jun 22, 03:35 UTCJun 22, 05:29 UTC1h 55m
2026-06-22 OXM MBW → MEB Jun 22, 03:19 UTCJun 22, 03:30 UTC10m
2026-06-22 OXM MBW → MBW Jun 22, 00:04 UTCJun 22, 01:00 UTC55m
2026-06-21 OXM - Jun 21, 05:15 UTCJun 21, 05:49 UTC35m
2026-06-20 OXM - Jun 20, 23:34 UTCJun 21, 00:14 UTC40m
2026-06-10 OXM MBW → MBW Jun 10, 06:00 UTCJun 10, 06:50 UTC50m
2026-06-09 OXM - Jun 9, 06:35 UTCJun 9, 06:50 UTC15m
2026-06-09 OXM - Jun 9, 04:05 UTCJun 9, 06:30 UTC2h 25m
2026-06-09 OXM MBW → MBW Jun 9, 02:45 UTCJun 9, 03:25 UTC40m
2026-06-08 OXM - Jun 8, 23:35 UTCJun 9, 01:20 UTC1h 45m
2026-06-08 OXM MBW → MEB Jun 8, 23:10 UTCJun 8, 23:20 UTC10m
2026-06-07 OXM MBW → MBW Jun 7, 23:05 UTCJun 8, 00:15 UTC1h 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-OXM page for operator, model, and routing details .

Mode-S 7C4A28 frequently asked

What is Mode-S code 7C4A28?
7C4A28 is an ICAO 24-bit transponder address. Allocated to Australia. Assigned to VH-OXM.
Where is Mode-S 7C4A28 registered?
Mode-S code 7C4A28 is allocated to Australia (AU). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 7C4A28 broadcasting right now?
No active broadcast right now. Last signal was 9h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 7C4A28, octal 37045050, decimal 8,145,448.
What flights does 7C4A28 operate?
Mode-S 7C4A28 has broadcast 1 distinct callsign, including OXM.