Apparatus

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sensors Mode-S transponder

7C7B54

ICAO 24-bit transponder address · allocated to Australia

Currently assigned to VH-YNA · DIAMOND DA-40 Club Star · operated by FLIGHT TRAINING ADELAIDE PTY LTD

Hex
7C7B54
Octal
37075524
Decimal
8,158,036
Country
AU
Tail
VH-YNA
Type
DA40
No current signal · last broadcast Apr 29, 01:45 UTC
Flights observed
37
Distinct callsigns
1
Country
AU
Last broadcast
Apr 29, 01:45 UTC

Last known position

Most recent position reported by Mode-S 7C7B54.

Country allocation

The ICAO 24-bit address 7C7B54 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
YNA - 37 2026-04-29

Recent flights last 37

DateFlightRouteTakeoffLandingDuration
2026-04-29 YNA - Apr 29, 01:10 UTCApr 29, 01:45 UTC35m
2026-04-28 YNA - Apr 28, 22:15 UTCApr 29, 00:20 UTC2h 5m
2026-04-28 YNA - Apr 28, 05:05 UTCApr 28, 05:45 UTC40m
2026-04-28 YNA - Apr 28, 02:55 UTCApr 28, 04:00 UTC1h 5m
2026-04-28 YNA - Apr 28, 01:25 UTCApr 28, 01:55 UTC30m
2026-04-23 YNA - Apr 23, 23:25 UTCApr 24, 00:30 UTC1h 5m
2026-04-23 YNA - Apr 23, 06:05 UTCApr 23, 06:45 UTC40m
2026-04-23 YNA - Apr 23, 03:55 UTCApr 23, 05:00 UTC1h 5m
2026-04-23 YNA - Apr 23, 01:45 UTCApr 23, 02:55 UTC1h 10m
2026-04-22 YNA - Apr 22, 23:50 UTCApr 23, 00:45 UTC55m
2026-04-22 YNA - Apr 22, 21:45 UTCApr 22, 22:35 UTC50m
2026-04-22 YNA - Apr 22, 06:50 UTCApr 22, 07:00 UTC10m
2026-04-22 YNA - Apr 22, 05:01 UTCApr 22, 05:20 UTC20m
2026-04-22 YNA - Apr 22, 02:10 UTCApr 22, 03:05 UTC55m
2026-04-22 YNA - Apr 22, 00:15 UTCApr 22, 01:15 UTC1h 0m
2026-04-21 YNA - Apr 21, 04:50 UTCApr 21, 06:10 UTC1h 20m
2026-04-21 YNA - Apr 21, 02:25 UTCApr 21, 03:05 UTC40m
2026-04-21 YNA - Apr 21, 00:15 UTCApr 21, 01:05 UTC50m
2026-04-18 YNA - Apr 18, 01:25 UTCApr 18, 02:50 UTC1h 25m
2026-04-18 YNA - Apr 18, 00:40 UTCApr 18, 01:20 UTC40m
2026-04-17 YNA - Apr 17, 07:20 UTCApr 17, 08:15 UTC55m
2026-04-17 YNA - Apr 17, 07:05 UTCApr 17, 07:15 UTC10m
2026-04-17 YNA - Apr 17, 05:35 UTCApr 17, 06:10 UTC35m
2026-04-17 YNA - Apr 17, 01:30 UTCApr 17, 02:25 UTC55m
2026-04-16 YNA - Apr 16, 07:09 UTCApr 16, 07:49 UTC40m
2026-04-16 YNA - Apr 16, 06:49 UTCApr 16, 07:05 UTC15m
2026-04-16 YNA - Apr 16, 04:44 UTCApr 16, 05:05 UTC20m
2026-04-16 YNA - Apr 16, 01:35 UTCApr 16, 03:04 UTC1h 30m
2026-04-16 YNA - Apr 16, 00:30 UTCApr 16, 00:45 UTC15m
2026-04-15 YNA - Apr 15, 22:30 UTCApr 15, 22:50 UTC20m
2026-04-15 YNA - Apr 15, 05:00 UTCApr 15, 06:55 UTC1h 55m
2026-04-15 YNA - Apr 15, 04:20 UTCApr 15, 04:50 UTC30m
2026-04-15 YNA - Apr 15, 03:00 UTCApr 15, 03:10 UTC10m
2026-04-15 YNA - Apr 15, 01:05 UTCApr 15, 01:30 UTC25m
2026-04-14 YNA - Apr 14, 23:05 UTCApr 14, 23:20 UTC15m
2026-04-14 YNA - Apr 14, 07:10 UTCApr 14, 07:25 UTC15m
2026-04-14 YNA - Apr 14, 05:25 UTCApr 14, 07:10 UTC1h 45m

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

Mode-S 7C7B54 frequently asked

What is Mode-S code 7C7B54?
7C7B54 is an ICAO 24-bit transponder address. Allocated to Australia. Assigned to VH-YNA.
Where is Mode-S 7C7B54 registered?
Mode-S code 7C7B54 is allocated to Australia (AU). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 7C7B54 broadcasting right now?
No active broadcast right now. Last signal was Apr 29, 01:45 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 7C7B54, octal 37075524, decimal 8,158,036.
What flights does 7C7B54 operate?
Mode-S 7C7B54 has broadcast 1 distinct callsign, including YNA.