sensors Mode-S transponder

3965B2

ICAO 24-bit transponder address · allocated to France

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

Hex
3965B2
Octal
16262662
Decimal
3,761,586
Country
FR
Tail
F-GZNS
Type
B77W
No current signal · last broadcast 23h ago
Flights observed
9
Distinct callsigns
4
Country
FR
Last broadcast
23h ago

Last known position

Most recent position reported by Mode-S 3965B2.

Country allocation

The ICAO 24-bit address 3965B2 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
AFR718 Air France 4 2026-04-13
AFR443 - 3 2026-04-13
AFR719 - 1 2026-04-13
AFR442 Air France 1 2026-04-12

Recent flights last 9

DateFlightRouteTakeoffLandingDuration
2026-04-13 AFR719 - Apr 13, 23:25 UTCApr 13, 23:40 UTC15m
2026-04-13 AFR718 CDG → DSS Apr 13, 20:00 UTCApr 13, 20:30 UTC30m
2026-04-13 AFR718 CDG → DSS Apr 13, 16:15 UTCApr 13, 20:10 UTC3h 55m
2026-04-13 AFR718 CDG → DSS Apr 13, 15:50 UTCApr 13, 17:45 UTC1h 55m
2026-04-13 AFR718 CDG → DSS Apr 13, 15:30 UTCApr 13, 16:15 UTC45m
2026-04-13 AFR443 - Apr 13, 08:50 UTCApr 13, 12:00 UTC3h 10m
2026-04-13 AFR443 - Apr 13, 03:55 UTCApr 13, 04:05 UTC10m
2026-04-13 AFR443 - Apr 13, 01:25 UTCApr 13, 04:05 UTC2h 40m
2026-04-12 AFR442 CDG → GIG Apr 12, 19:45 UTCApr 12, 20:15 UTC30m

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

Mode-S 3965B2 frequently asked

What is Mode-S code 3965B2?
3965B2 is an ICAO 24-bit transponder address. Allocated to France. Assigned to F-GZNS.
Where is Mode-S 3965B2 registered?
Mode-S code 3965B2 is allocated to France (FR). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 3965B2 broadcasting right now?
No active broadcast right now. Last signal was 23h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 3965B2, octal 16262662, decimal 3,761,586.
What flights does 3965B2 operate?
Mode-S 3965B2 has broadcast 4 distinct callsigns, including AFR718, AFR443, AFR719, AFR442.