Apparatus

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sensors Mode-S transponder

3965B3

ICAO 24-bit transponder address · allocated to France

Currently assigned to F-GZNT · BOEING 777-300ER

Hex
3965B3
Octal
16262663
Decimal
3,761,587
Country
FR
Tail
F-GZNT
Type
B77W
Broadcasting now · callsign AFR33J · 35,000 ft
Flights observed
10
Distinct callsigns
4
Country
FR
Last broadcast
1d ago

Current position

3965B3 is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address 3965B3 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 4 distinct

Callsign Airline Flights Last seen
AFR345M - 4 2026-04-13
AFR342T - 4 2026-04-13
AFR344 - 1 2026-04-12
AFR343 - 1 2026-04-13

Recent flights last 10

DateFlightRouteTakeoffLandingDuration
2026-04-13 AFR343 - Apr 13, 21:20 UTCApr 13, 22:35 UTC1h 15m
2026-04-13 AFR342T - Apr 13, 16:15 UTCApr 13, 16:25 UTC10m
2026-04-13 AFR342T - Apr 13, 15:50 UTCApr 13, 16:25 UTC35m
2026-04-13 AFR342T - Apr 13, 15:00 UTCApr 13, 16:15 UTC1h 15m
2026-04-13 AFR342T - Apr 13, 09:05 UTCApr 13, 10:55 UTC1h 50m
2026-04-13 AFR345M - Apr 13, 04:20 UTCApr 13, 05:35 UTC1h 15m
2026-04-13 AFR345M - Apr 13, 04:00 UTCApr 13, 05:35 UTC1h 35m
2026-04-13 AFR345M - Apr 13, 00:20 UTCApr 13, 04:15 UTC3h 55m
2026-04-12 AFR345M - Apr 12, 23:55 UTCApr 13, 00:40 UTC45m
2026-04-12 AFR344 - Apr 12, 18:15 UTCApr 12, 19:30 UTC1h 15m

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

Mode-S 3965B3 frequently asked

What is Mode-S code 3965B3?
3965B3 is an ICAO 24-bit transponder address. Allocated to France. Assigned to F-GZNT.
Where is Mode-S 3965B3 registered?
Mode-S code 3965B3 is allocated to France (FR). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 3965B3 broadcasting right now?
Yes. Mode-S 3965B3 is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 3965B3, octal 16262663, decimal 3,761,587.
What flights does 3965B3 operate?
Mode-S 3965B3 has broadcast 4 distinct callsigns, including AFR345M, AFR342T, AFR344, AFR343.