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 AFR274 · 31,000 ft
Flights observed
143
Distinct callsigns
20
Country
FR
Last broadcast
1h 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 11 2026-07-06
AFR091 - 11 2026-07-15
AFR257 Air France 10 2026-07-07
AFR090 - 10 2026-07-14
AFR004 - 10 2026-07-21
AFR3T Air France 8 2026-07-21
AFR24X Air France 8 2026-07-22
AFR025 Air France 8 2026-07-23
AFR021 Air France 6 2026-06-20
AFR020 Air France 6 2026-06-20
AFR007 - 6 2026-06-29
AFR23G - 5 2026-07-10
AFR22J - 5 2026-07-10
AFR274 Air France 4 2026-07-24
AFR8U Air France 3 2026-05-16
AFR8F - 3 2026-06-28
AFR279 Air France 3 2026-06-06
AFR828 - 2 2026-07-02
AFR010 - 2 2026-07-04
AFR003 - 2 2026-05-06

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-24 AFR274 CDG → HND Jul 24, 21:25 UTCJul 24, 22:15 UTC50m
2026-07-24 AFR65F EWR → CDG Jul 24, 05:15 UTCJul 24, 11:40 UTC6h 25m
2026-07-23 AFR064 CDG → EWR Jul 23, 18:10 UTCJul 24, 01:35 UTC7h 25m
2026-07-23 AFR025 LAX → CDG Jul 23, 01:50 UTCJul 23, 11:50 UTC10h 0m
2026-07-22 AFR24X CDG → LAX Jul 22, 12:15 UTCJul 22, 23:25 UTC11h 10m
2026-07-21 AFR3T JFK → CDG Jul 21, 21:55 UTCJul 22, 04:35 UTC6h 40m
2026-07-21 AFR004 - Jul 21, 08:55 UTCJul 21, 16:05 UTC7h 10m
2026-07-20 AFR3T JFK → CDG Jul 20, 22:25 UTCJul 21, 04:55 UTC6h 30m
2026-07-20 AFR004 - Jul 20, 09:05 UTCJul 20, 16:35 UTC7h 30m
2026-07-19 AFR3T JFK → CDG Jul 19, 22:45 UTCJul 20, 05:15 UTC6h 30m
2026-07-19 AFR004 - Jul 19, 09:05 UTCJul 19, 16:20 UTC7h 15m
2026-07-18 AFR1U JFK → CDG Jul 18, 21:45 UTCJul 19, 04:30 UTC6h 45m
2026-07-18 AFR2N CDG → JFK Jul 18, 07:05 UTCJul 18, 14:05 UTC7h 0m
2026-07-17 AFR025 - Jul 17, 01:39 UTCJul 17, 12:00 UTC10h 20m
2026-07-16 AFR24X - Jul 16, 12:00 UTCJul 16, 22:40 UTC10h 40m
2026-07-15 AFR091 MIA → CDG Jul 15, 00:40 UTCJul 15, 09:00 UTC8h 20m
2026-07-14 AFR090 CDG → MIA Jul 14, 12:40 UTCJul 14, 21:40 UTC9h 0m
2026-07-14 AFR091 MIA → CDG Jul 14, 01:00 UTCJul 14, 09:20 UTC8h 20m
2026-07-13 AFR090 - Jul 13, 12:55 UTCJul 13, 21:45 UTC8h 50m
2026-07-13 AFR091 - Jul 13, 07:15 UTCJul 13, 08:55 UTC1h 40m
2026-07-13 AFR091 - Jul 13, 00:45 UTCJul 13, 02:25 UTC1h 40m
2026-07-12 AFR090 - Jul 12, 12:30 UTCJul 12, 21:20 UTC8h 50m
2026-07-12 AFR51N - Jul 12, 01:50 UTCJul 12, 08:50 UTC7h 0m
2026-07-11 AFR050 - Jul 11, 22:40 UTCJul 11, 23:00 UTC20m
2026-07-11 AFR50N - Jul 11, 12:30 UTCJul 11, 20:50 UTC8h 20m
2026-07-10 AFR23G - Jul 10, 22:35 UTCJul 11, 08:45 UTC10h 10m
2026-07-10 AFR22J - Jul 10, 09:25 UTCJul 10, 20:20 UTC10h 55m
2026-07-09 AFR3T JFK → CDG Jul 9, 22:25 UTCJul 10, 04:50 UTC6h 25m
2026-07-09 AFR004 - Jul 9, 09:10 UTCJul 9, 16:30 UTC7h 20m
2026-07-08 AFR3T - Jul 8, 22:10 UTCJul 9, 04:45 UTC6h 35m
2026-07-08 AFR004 - Jul 8, 08:50 UTCJul 8, 16:00 UTC7h 10m
2026-07-07 AFR257 SIN → CDG Jul 7, 14:50 UTCJul 8, 03:45 UTC12h 55m
2026-07-06 AFR256 CDG → SIN Jul 6, 21:50 UTCJul 7, 09:55 UTC12h 5m
2026-07-06 AFR4083 - Jul 6, 07:55 UTCJul 6, 14:15 UTC6h 20m
2026-07-04 AFR010 - Jul 4, 17:05 UTCJul 5, 00:35 UTC7h 30m
2026-07-04 AFR025 - Jul 4, 01:50 UTCJul 4, 12:00 UTC10h 10m
2026-07-03 AFR24X CDG → LAX Jul 3, 12:35 UTCJul 3, 23:35 UTC11h 0m
2026-07-03 AFR829B - Jul 3, 03:10 UTCJul 3, 06:15 UTC3h 5m
2026-07-02 AFR828 - Jul 2, 19:00 UTCJul 2, 19:10 UTC10m
2026-07-02 AFR828 - Jul 2, 11:10 UTCJul 2, 15:00 UTC3h 50m
2026-07-01 AFR3T JFK → CDG Jul 1, 21:55 UTCJul 2, 04:25 UTC6h 30m
2026-07-01 AFR004 - Jul 1, 09:15 UTCJul 1, 16:40 UTC7h 25m
2026-06-30 AFR257 SIN → CDG Jun 30, 14:50 UTCJul 1, 03:55 UTC13h 5m
2026-06-29 AFR256 CDG → SIN Jun 29, 21:44 UTCJun 30, 10:30 UTC12h 46m
2026-06-29 AFR007 - Jun 29, 02:45 UTCJun 29, 09:20 UTC6h 35m
2026-06-28 AFR8F - Jun 28, 14:54 UTCJun 28, 22:20 UTC7h 25m
2026-06-28 AFR009 JFK → CDG Jun 28, 03:55 UTCJun 28, 10:10 UTC6h 15m
2026-06-27 AFR010 - Jun 27, 17:04 UTCJun 28, 00:15 UTC7h 10m
2026-06-27 AFR091 - Jun 27, 00:55 UTCJun 27, 09:04 UTC8h 10m
2026-06-26 AFR090 CDG → MIA Jun 26, 12:55 UTCJun 26, 21:59 UTC9h 5m

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, AFR091, AFR257, AFR090, AFR004.