Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

3965B1

ICAO 24-bit transponder address · allocated to France

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

Hex
3965B1
Octal
16262661
Decimal
3,761,585
Country
FR
Tail
F-GZNR
Type
B77W
Broadcasting now · callsign AFR256 · 31,000 ft
Flights observed
71
Distinct callsigns
20
Country
FR
Last broadcast
46m ago

Current position

3965B1 is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address 3965B1 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 20 distinct

Callsign Airline Flights Last seen
AFR256 Air France 7 2026-06-09
AFR257 Air France 5 2026-05-20
AFR24X Air France 5 2026-06-08
AFR025 Air France 5 2026-06-09
AFR021 Air France 5 2026-06-07
AFR020 Air France 5 2026-06-07
AFR23G Air France 4 2026-05-15
AFR22J Air France 4 2026-05-15
AFR091 Air France 4 2026-05-27
AFR090 Air France 4 2026-05-26
AFR8U Air France 3 2026-05-16
AFR279 Air France 3 2026-06-06
AFR274 Air France 3 2026-06-05
AFR007 - 3 2026-05-17
AFR004 - 2 2026-05-06
AFR003 - 2 2026-05-06
AFR719 Air France 1 2026-06-02
AFR718 Air France 1 2026-06-01
AFR375Y - 1 2026-04-24
AFR137T Air France 1 2026-05-21

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-06-09 AFR256 CDG → SIN Jun 9, 21:35 UTCJun 9, 22:15 UTC40m
2026-06-09 AFR025 LAX → CDG Jun 9, 01:40 UTCJun 9, 11:40 UTC10h 0m
2026-06-08 AFR24X CDG → LAX Jun 8, 12:15 UTCJun 8, 23:15 UTC11h 0m
2026-06-07 AFR021 LAX → CDG Jun 7, 21:15 UTCJun 8, 07:15 UTC10h 0m
2026-06-07 AFR020 CDG → LAX Jun 7, 07:40 UTCJun 7, 18:30 UTC10h 50m
2026-06-06 AFR279 HND → CDG Jun 6, 13:15 UTCJun 7, 03:40 UTC14h 25m
2026-06-05 AFR274 CDG → HND Jun 5, 21:10 UTCJun 6, 09:50 UTC12h 40m
2026-06-05 AFR025 LAX → CDG Jun 5, 01:45 UTCJun 5, 11:55 UTC10h 10m
2026-06-04 AFR24X CDG → LAX Jun 4, 12:25 UTCJun 4, 23:05 UTC10h 40m
2026-06-02 AFR021 LAX → CDG Jun 2, 21:30 UTCJun 3, 07:50 UTC10h 20m
2026-06-02 AFR020 CDG → LAX Jun 2, 08:10 UTCJun 2, 19:05 UTC10h 55m
2026-06-02 AFR719 DSS → CDG Jun 2, 00:00 UTCJun 2, 05:00 UTC5h 0m
2026-06-01 AFR718 CDG → DSS Jun 1, 15:45 UTCJun 1, 20:45 UTC5h 0m
2026-05-31 AFR021 LAX → CDG May 31, 21:10 UTCJun 1, 07:20 UTC10h 10m
2026-05-31 AFR020 CDG → LAX May 31, 08:25 UTCMay 31, 18:20 UTC9h 55m
2026-05-29 AFR021 LAX → CDG May 29, 21:15 UTCMay 30, 07:55 UTC10h 40m
2026-05-29 AFR020 CDG → LAX May 29, 07:55 UTCMay 29, 18:35 UTC10h 40m
2026-05-28 AFR279 HND → CDG May 28, 13:20 UTCMay 29, 03:10 UTC13h 50m
2026-05-27 AFR274 CDG → HND May 27, 21:25 UTCMay 28, 10:10 UTC12h 45m
2026-05-27 AFR091 MIA → CDG May 27, 00:30 UTCMay 27, 09:00 UTC8h 30m
2026-05-26 AFR090 CDG → MIA May 26, 12:40 UTCMay 26, 21:34 UTC8h 55m
2026-05-25 AFR021 LAX → CDG May 25, 21:15 UTCMay 26, 07:29 UTC10h 15m
2026-05-25 AFR020 CDG → LAX May 25, 07:35 UTCMay 25, 18:30 UTC10h 55m
2026-05-24 AFR279 HND → CDG May 24, 13:35 UTCMay 25, 03:55 UTC14h 20m
2026-05-23 AFR274 CDG → HND May 23, 21:20 UTCMay 24, 10:15 UTC12h 55m
2026-05-23 AFR025 LAX → CDG May 23, 01:35 UTCMay 23, 11:45 UTC10h 9m
2026-05-22 AFR24X CDG → LAX May 22, 12:15 UTCMay 22, 22:50 UTC10h 35m
2026-05-21 AFR137T ORD → CDG May 21, 23:10 UTCMay 22, 06:00 UTC6h 50m
2026-05-21 AFR136 CDG → ORD May 21, 11:40 UTCMay 21, 20:05 UTC8h 25m
2026-05-20 AFR257 SIN → CDG May 20, 14:50 UTCMay 21, 03:30 UTC12h 40m
2026-05-19 AFR256 CDG → SIN May 19, 21:40 UTCMay 20, 10:05 UTC12h 26m
2026-05-19 AFR091 MIA → CDG May 19, 00:30 UTCMay 19, 08:50 UTC8h 20m
2026-05-18 AFR090 CDG → MIA May 18, 12:30 UTCMay 18, 21:30 UTC8h 59m
2026-05-18 AFR091 MIA → CDG May 18, 00:40 UTCMay 18, 08:45 UTC8h 5m
2026-05-17 AFR090 CDG → MIA May 17, 12:25 UTCMay 17, 21:45 UTC9h 20m
2026-05-17 AFR007 - May 17, 02:20 UTCMay 17, 08:45 UTC6h 25m
2026-05-16 AFR8U CDG → JFK May 16, 14:55 UTCMay 16, 22:30 UTC7h 35m
2026-05-15 AFR23G LAX → CDG May 15, 22:30 UTCMay 16, 08:16 UTC9h 46m
2026-05-15 AFR22J CDG → LAX May 15, 08:45 UTCMay 15, 19:50 UTC11h 4m
2026-05-14 AFR091 MIA → CDG May 14, 01:25 UTCMay 14, 09:35 UTC8h 10m
2026-05-13 AFR090 CDG → MIA May 13, 12:40 UTCMay 13, 22:40 UTC10h 0m
2026-05-12 AFR23G LAX → CDG May 12, 22:20 UTCMay 13, 08:35 UTC10h 15m
2026-05-12 AFR22J CDG → LAX May 12, 08:40 UTCMay 12, 19:45 UTC11h 5m
2026-05-11 AFR257 SIN → CDG May 11, 15:05 UTCMay 12, 03:55 UTC12h 51m
2026-05-10 AFR256 CDG → SIN May 10, 21:54 UTCMay 11, 09:45 UTC11h 50m
2026-05-10 AFR025 LAX → CDG May 10, 02:04 UTCMay 10, 12:25 UTC10h 20m
2026-05-09 AFR24X CDG → LAX May 9, 12:30 UTCMay 9, 23:09 UTC10h 40m
2026-05-09 AFR007 JFK → CDG May 9, 01:55 UTCMay 9, 08:45 UTC6h 50m
2026-05-08 AFR8U CDG → JFK May 8, 14:55 UTCMay 8, 22:20 UTC7h 25m
2026-05-07 AFR23G LAX → CDG May 7, 22:54 UTCMay 8, 09:14 UTC10h 20m

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

Mode-S 3965B1 frequently asked

What is Mode-S code 3965B1?
3965B1 is an ICAO 24-bit transponder address. Allocated to France. Assigned to F-GZNR.
Where is Mode-S 3965B1 registered?
Mode-S code 3965B1 is allocated to France (FR). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 3965B1 broadcasting right now?
Yes. Mode-S 3965B1 is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 3965B1, octal 16262661, decimal 3,761,585.
What flights does 3965B1 operate?
Mode-S 3965B1 has broadcast 20 distinct callsigns, including AFR256, AFR257, AFR24X, AFR025, AFR021.