sensors Mode-S transponder

3920C4

ICAO 24-bit transponder address · allocated to France

Currently assigned to F-GIGE · CESSNA 172 Skyhawk

Hex
3920C4
Octal
16220304
Decimal
3,743,940
Country
FR
Tail
F-GIGE
Type
C172
No current signal · last broadcast 21h ago
Flights observed
1
Distinct callsigns
1
Country
FR
Last broadcast
21h ago

Last known position

Most recent position reported by Mode-S 3920C4.

Country allocation

The ICAO 24-bit address 3920C4 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
FGIGE - 1 2026-04-14

Recent flights last 1

DateFlightRouteTakeoffLandingDuration
2026-04-14 FGIGE LYN → LYN Apr 14, 07:10 UTCApr 14, 07:55 UTC45m

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

Mode-S 3920C4 frequently asked

What is Mode-S code 3920C4?
3920C4 is an ICAO 24-bit transponder address. Allocated to France. Assigned to F-GIGE.
Where is Mode-S 3920C4 registered?
Mode-S code 3920C4 is allocated to France (FR). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 3920C4 broadcasting right now?
No active broadcast right now. Last signal was 21h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 3920C4, octal 16220304, decimal 3,743,940.
What flights does 3920C4 operate?
Mode-S 3920C4 has broadcast 1 distinct callsign, including FGIGE.