Apparatus

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sensors Mode-S transponder

7C6359

ICAO 24-bit transponder address · allocated to Australia

Currently assigned to VH-TWR · PIPER PA-31-300/310/325/350/425 · operated by AIR LINK PTY. LIMITED

Hex
7C6359
Octal
37061531
Decimal
8,151,897
Country
AU
Tail
VH-TWR
Type
PA31
No current signal · last broadcast 15h ago
Flights observed
9
Distinct callsigns
1
Country
AU
Last broadcast
15h ago

Last known position

Most recent position reported by Mode-S 7C6359.

Country allocation

The ICAO 24-bit address 7C6359 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
TWR - 9 2026-04-14

Recent flights last 9

DateFlightRouteTakeoffLandingDuration
2026-04-14 TWR - Apr 14, 10:50 UTCApr 14, 11:05 UTC15m
2026-04-14 TWR - Apr 14, 09:10 UTCApr 14, 10:20 UTC1h 10m
2026-04-14 TWR - Apr 14, 08:15 UTCApr 14, 09:05 UTC50m
2026-04-13 TWR - Apr 13, 12:35 UTCApr 13, 13:05 UTC30m
2026-04-13 TWR - Apr 13, 11:55 UTCApr 13, 12:10 UTC15m
2026-04-13 TWR - Apr 13, 10:35 UTCApr 13, 12:10 UTC1h 35m
2026-04-13 TWR - Apr 13, 09:15 UTCApr 13, 10:05 UTC50m
2026-04-13 TWR - Apr 13, 08:20 UTCApr 13, 09:10 UTC50m
2026-04-13 TWR - Apr 13, 08:05 UTCApr 13, 08:15 UTC10m

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

Mode-S 7C6359 frequently asked

What is Mode-S code 7C6359?
7C6359 is an ICAO 24-bit transponder address. Allocated to Australia. Assigned to VH-TWR.
Where is Mode-S 7C6359 registered?
Mode-S code 7C6359 is allocated to Australia (AU). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 7C6359 broadcasting right now?
No active broadcast right now. Last signal was 15h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 7C6359, octal 37061531, decimal 8,151,897.
What flights does 7C6359 operate?
Mode-S 7C6359 has broadcast 1 distinct callsign, including TWR.