Apparatus

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sensors Mode-S transponder

394F05

ICAO 24-bit transponder address · allocated to France

Currently assigned to F-GTYF · SOCATA TB-20 Trinidad

Hex
394F05
Octal
16247405
Decimal
3,755,781
Country
FR
Tail
F-GTYF
Type
TB20
No current signal · last broadcast 12h ago
Flights observed
9
Distinct callsigns
3
Country
FR
Last broadcast
12h ago

Last known position

Most recent position reported by Mode-S 394F05.

Country allocation

The ICAO 24-bit address 394F05 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 3 distinct

Callsign Airline Flights Last seen
NAK733 - 3 2026-04-13
NAK706 - 3 2026-04-13
FGTYF - 3 2026-04-14

Recent flights last 9

DateFlightRouteTakeoffLandingDuration
2026-04-14 FGTYF - Apr 14, 10:05 UTCApr 14, 10:20 UTC15m
2026-04-14 FGTYF - Apr 14, 09:15 UTCApr 14, 09:25 UTC10m
2026-04-13 NAK706 - Apr 13, 16:15 UTCApr 13, 16:25 UTC10m
2026-04-13 NAK706 - Apr 13, 15:50 UTCApr 13, 16:25 UTC35m
2026-04-13 NAK706 - Apr 13, 15:10 UTCApr 13, 16:15 UTC1h 5m
2026-04-13 NAK733 - Apr 13, 13:20 UTCApr 13, 14:05 UTC45m
2026-04-13 NAK733 - Apr 13, 12:20 UTCApr 13, 12:40 UTC20m
2026-04-13 NAK733 - Apr 13, 12:00 UTCApr 13, 12:15 UTC15m
2026-04-13 FGTYF - Apr 13, 09:15 UTCApr 13, 09:55 UTC40m

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

Mode-S 394F05 frequently asked

What is Mode-S code 394F05?
394F05 is an ICAO 24-bit transponder address. Allocated to France. Assigned to F-GTYF.
Where is Mode-S 394F05 registered?
Mode-S code 394F05 is allocated to France (FR). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 394F05 broadcasting right now?
No active broadcast right now. Last signal was 12h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 394F05, octal 16247405, decimal 3,755,781.
What flights does 394F05 operate?
Mode-S 394F05 has broadcast 3 distinct callsigns, including NAK733, NAK706, FGTYF.