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sensors Mode-S transponder

7C3F3B

ICAO 24-bit transponder address · allocated to Australia

Currently assigned to VH-MRX · PIPER PA-28-140/150/160/180 · operated by ROYAL VICTORIAN AERO CLUB.

Hex
7C3F3B
Octal
37037473
Decimal
8,142,651
Country
AU
Tail
VH-MRX
Type
P28A
No current signal · last broadcast 6h ago
Flights observed
121
Distinct callsigns
1
Country
AU
Last broadcast
6h ago

Last known position

Most recent position reported by Mode-S 7C3F3B.

Country allocation

The ICAO 24-bit address 7C3F3B 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
MRX - 121 2026-07-13

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-13 MRX MBW → MBW Jul 13, 23:10 UTCJul 14, 01:00 UTC1h 50m
2026-07-10 MRX - Jul 10, 06:20 UTCJul 10, 07:20 UTC1h 0m
2026-07-10 MRX - Jul 10, 04:45 UTCJul 10, 05:20 UTC35m
2026-07-10 MRX MBW → MBW Jul 10, 01:30 UTCJul 10, 02:25 UTC55m
2026-07-09 MRX MBW → MBW Jul 9, 23:00 UTCJul 10, 00:15 UTC1h 15m
2026-07-09 MRX MBW → MBW Jul 9, 02:50 UTCJul 9, 03:25 UTC35m
2026-07-08 MRX MBW → MBW Jul 8, 04:05 UTCJul 8, 05:45 UTC1h 40m
2026-07-07 MRX MBW → MBW Jul 7, 06:10 UTCJul 7, 06:30 UTC20m
2026-07-06 MRX MBW → MBW Jul 6, 00:10 UTCJul 6, 00:45 UTC35m
2026-07-05 MRX MBW → MBW Jul 5, 05:00 UTCJul 5, 05:45 UTC45m
2026-07-01 MRX MBW → MBW Jul 1, 03:40 UTCJul 1, 06:00 UTC2h 20m
2026-07-01 MRX - Jul 1, 00:35 UTCJul 1, 01:25 UTC50m
2026-06-30 MRX - Jun 30, 23:40 UTCJul 1, 00:05 UTC25m
2026-06-28 MRX MBW → MBW Jun 28, 23:50 UTCJun 29, 02:05 UTC2h 15m
2026-06-28 MRX - Jun 28, 05:09 UTCJun 28, 06:40 UTC1h 30m
2026-06-28 MRX - Jun 28, 00:20 UTCJun 28, 01:15 UTC55m
2026-06-25 MRX MBW → MBW Jun 25, 04:49 UTCJun 25, 05:55 UTC1h 5m
2026-06-24 MRX MBW → MBW Jun 24, 05:24 UTCJun 24, 06:10 UTC45m
2026-06-23 MRX - Jun 23, 03:39 UTCJun 23, 03:54 UTC15m
2026-06-23 MRX - Jun 23, 02:04 UTCJun 23, 02:20 UTC15m
2026-06-22 MRX - Jun 22, 05:15 UTCJun 22, 05:49 UTC35m
2026-06-22 MRX - Jun 22, 03:50 UTCJun 22, 04:15 UTC25m
2026-06-21 MRX MBW → MBW Jun 21, 23:50 UTCJun 22, 01:15 UTC1h 25m
2026-06-21 MRX - Jun 21, 05:54 UTCJun 21, 06:44 UTC50m
2026-06-20 MRX - Jun 20, 23:59 UTCJun 21, 00:45 UTC45m
2026-06-19 MRX - Jun 19, 00:49 UTCJun 19, 01:39 UTC50m
2026-06-18 MRX - Jun 18, 23:30 UTCJun 18, 23:50 UTC20m
2026-06-17 MRX - Jun 17, 03:15 UTCJun 17, 03:30 UTC15m
2026-06-17 MRX MBW → MBW Jun 17, 02:35 UTCJun 17, 02:55 UTC20m
2026-06-17 MRX - Jun 17, 00:25 UTCJun 17, 02:00 UTC1h 35m
2026-06-17 MRX MBW → MEB Jun 17, 00:00 UTCJun 17, 00:15 UTC15m
2026-06-16 MRX MBW → MBW Jun 16, 03:10 UTCJun 16, 04:30 UTC1h 20m
2026-06-16 MRX MBW → MBW Jun 16, 01:30 UTCJun 16, 02:45 UTC1h 15m
2026-06-15 MRX MBW → MBW Jun 15, 04:15 UTCJun 15, 05:30 UTC1h 15m
2026-06-15 MRX - Jun 15, 00:15 UTCJun 15, 01:50 UTC1h 35m
2026-06-14 MRX MBW → MEB Jun 14, 23:50 UTCJun 15, 00:05 UTC15m
2026-06-14 MRX - Jun 14, 05:40 UTCJun 14, 06:15 UTC35m
2026-06-13 MRX - Jun 13, 23:25 UTCJun 14, 00:05 UTC40m
2026-06-12 MRX MBW → MBW Jun 12, 04:35 UTCJun 12, 05:25 UTC50m
2026-06-12 MRX MBW → MBW Jun 12, 00:55 UTCJun 12, 02:40 UTC1h 45m
2026-06-11 MRX MEB → MBW Jun 11, 00:50 UTCJun 11, 02:15 UTC1h 25m
2026-06-11 MRX MBW → MEB Jun 11, 00:30 UTCJun 11, 00:45 UTC15m
2026-06-09 MRX - Jun 9, 05:50 UTCJun 9, 06:25 UTC35m
2026-06-09 MRX - Jun 9, 04:40 UTCJun 9, 05:10 UTC30m
2026-06-09 MRX MBW → MBW Jun 9, 00:35 UTCJun 9, 01:55 UTC1h 20m
2026-06-08 MRX MBW → MBW Jun 8, 00:55 UTCJun 8, 02:45 UTC1h 50m
2026-06-07 MRX - Jun 7, 01:35 UTCJun 7, 02:14 UTC40m
2026-06-06 MRX - Jun 6, 23:44 UTCJun 7, 00:25 UTC40m
2026-06-05 MRX - Jun 5, 01:55 UTCJun 5, 02:20 UTC25m
2026-06-04 MRX - Jun 4, 23:30 UTCJun 4, 23:50 UTC20m

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

Mode-S 7C3F3B frequently asked

What is Mode-S code 7C3F3B?
7C3F3B is an ICAO 24-bit transponder address. Allocated to Australia. Assigned to VH-MRX.
Where is Mode-S 7C3F3B registered?
Mode-S code 7C3F3B is allocated to Australia (AU). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 7C3F3B 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 7C3F3B, octal 37037473, decimal 8,142,651.
What flights does 7C3F3B operate?
Mode-S 7C3F3B has broadcast 1 distinct callsign, including MRX.