Apparatus

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sensors Mode-S transponder

390A04

ICAO 24-bit transponder address · allocated to France

Currently assigned to F-GCQE · PIPER PA-28-140/150/160/180

Hex
390A04
Octal
16205004
Decimal
3,738,116
Country
FR
Tail
F-GCQE
Type
P28A
No current signal · last broadcast 14h ago
Flights observed
8
Distinct callsigns
1
Country
FR
Last broadcast
14h ago

Last known position

Most recent position reported by Mode-S 390A04.

Country allocation

The ICAO 24-bit address 390A04 falls within the block assigned to France (FR) by ICAO Annex 10, Volume III. Every aircraft registered in France 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
FGCQE - 8 2026-04-14

Recent flights last 8

DateFlightRouteTakeoffLandingDuration
2026-04-14 FGCQE - Apr 14, 10:10 UTCApr 14, 10:45 UTC35m
2026-04-14 FGCQE - Apr 14, 09:10 UTCApr 14, 09:20 UTC10m
2026-04-14 FGCQE - Apr 14, 08:45 UTCApr 14, 09:05 UTC20m
2026-04-13 FGCQE - Apr 13, 23:20 UTCApr 13, 23:45 UTC25m
2026-04-13 FGCQE - Apr 13, 21:05 UTCApr 13, 22:45 UTC1h 40m
2026-04-13 FGCQE - Apr 13, 19:50 UTCApr 13, 20:30 UTC40m
2026-04-13 FGCQE - Apr 13, 19:20 UTCApr 13, 19:45 UTC25m
2026-04-13 FGCQE - Apr 13, 12:55 UTCApr 13, 14:35 UTC1h 40m

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 F-GCQE page for operator, model, and routing details .

Mode-S 390A04 frequently asked

What is Mode-S code 390A04?
390A04 is an ICAO 24-bit transponder address. Allocated to France. Assigned to F-GCQE.
Where is Mode-S 390A04 registered?
Mode-S code 390A04 is allocated to France (FR). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 390A04 broadcasting right now?
No active broadcast right now. Last signal was 14h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 390A04, octal 16205004, decimal 3,738,116.
What flights does 390A04 operate?
Mode-S 390A04 has broadcast 1 distinct callsign, including FGCQE.