sensors Mode-S transponder

39644A

ICAO 24-bit transponder address · allocated to France

Currently assigned to F-GZCK · AIRBUS A-330-200

Hex
39644A
Octal
16262112
Decimal
3,761,226
Country
FR
Tail
F-GZCK
Type
A332
No current signal · last broadcast 3d ago
Flights observed
48
Distinct callsigns
20
Country
FR
Last broadcast
3d ago

Last known position

Most recent position reported by Mode-S 39644A.

Country allocation

The ICAO 24-bit address 39644A 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
AFR848 Air France 9 2026-05-22
AFR499 Air France 9 2026-05-19
AFR947 Air France 4 2026-05-26
AFR946 Air France 2 2026-05-07
AFR863 Air France 2 2026-05-23
AFR860 Air France 2 2026-05-02
AFR832 Air France 2 2026-05-01
AFR389 - 2 2026-04-17
AFR374V Air France 2 2026-04-13
AFR194 Air France 2 2026-05-09
AFR191 Air France 2 2026-05-09
AFR926 Air France 1 2026-04-28
AFR923 Air France 1 2026-04-29
AFR63J Air France 1 2026-05-17
AFR579 Air France 1 2026-05-04
AFR578 Air France 1 2026-05-03
AFR498 Air France 1 2026-05-21
AFR388 Air France 1 2026-04-16
AFR380V Air France 1 2026-05-05
AFR373V - 1 2026-04-15

Recent flights last 48

DateFlightRouteTakeoffLandingDuration
2026-05-26 AFR947 DLA → CDG May 26, 11:15 UTCMay 27, 04:09 UTC16h 55m
2026-05-23 AFR863 LFW → CDG May 23, 14:25 UTCMay 24, 05:15 UTC14h 51m
2026-05-22 AFR848 DLA → CDG May 22, 11:35 UTCMay 23, 05:35 UTC18h 0m
2026-05-21 AFR498 CDG → SXM May 21, 08:35 UTCMay 22, 03:55 UTC19h 20m
2026-05-19 AFR499 SXM → CDG May 19, 08:40 UTCMay 20, 03:35 UTC18h 55m
2026-05-18 AFR499 SXM → CDG May 18, 08:45 UTCMay 19, 03:40 UTC18h 54m
2026-05-17 AFR63J EWR → CDG May 17, 22:30 UTCMay 18, 05:10 UTC6h 40m
2026-05-17 AFR062 CDG → EWR May 17, 10:45 UTCMay 17, 18:35 UTC7h 50m
2026-05-14 AFR499 SXM → CDG May 14, 05:05 UTCMay 14, 06:35 UTC1h 30m
2026-05-13 AFR499 SXM → CDG May 13, 08:35 UTCMay 14, 06:35 UTC22h 0m
2026-05-12 AFR863 LFW → CDG May 12, 14:05 UTCMay 13, 05:20 UTC15h 15m
2026-05-11 AFR848 DLA → CDG May 11, 10:35 UTCMay 12, 05:55 UTC19h 20m
2026-05-10 AFR499 SXM → CDG May 10, 10:05 UTCMay 11, 04:00 UTC17h 55m
2026-05-09 AFR191 BLR → CDG May 9, 21:40 UTCMay 10, 07:04 UTC9h 25m
2026-05-09 AFR191 BLR → CDG May 9, 20:20 UTCMay 9, 20:30 UTC10m
2026-05-09 AFR194 CDG → BLR May 9, 17:45 UTCMay 9, 18:05 UTC20m
2026-05-09 AFR194 CDG → BLR May 9, 08:30 UTCMay 9, 16:10 UTC7h 40m
2026-05-08 AFR947 DLA → CDG May 8, 01:45 UTCMay 8, 04:04 UTC2h 20m
2026-05-07 AFR946 CDG → DLA May 7, 11:00 UTCMay 7, 17:50 UTC6h 50m
2026-05-05 AFR380V SNN → CDG May 5, 23:15 UTCMay 6, 01:55 UTC2h 40m
2026-05-04 AFR848 DLA → CDG May 4, 10:55 UTCMay 4, 12:40 UTC1h 45m
2026-05-04 AFR579 CKY → CDG May 4, 00:30 UTCMay 4, 05:40 UTC5h 10m
2026-05-03 AFR578 CDG → CKY May 3, 15:50 UTCMay 3, 21:35 UTC5h 45m
2026-05-02 AFR860 CDG → LFW May 2, 14:25 UTCMay 3, 06:30 UTC16h 5m
2026-05-01 AFR832 CDG → PNR May 1, 12:10 UTCMay 2, 05:40 UTC17h 30m
2026-04-29 AFR923 LBV → CDG Apr 29, 12:40 UTCApr 29, 15:00 UTC2h 20m
2026-04-28 AFR926 CDG → LBV Apr 28, 09:15 UTCApr 28, 11:05 UTC1h 50m
2026-04-27 AFR860 CDG → LFW Apr 27, 14:10 UTCApr 28, 05:05 UTC14h 55m
2026-04-26 AFR499 SXM → CDG Apr 26, 08:45 UTCApr 27, 03:50 UTC19h 5m
2026-04-25 AFR946 CDG → DLA Apr 25, 10:40 UTCApr 26, 05:20 UTC18h 40m
2026-04-24 AFR832 CDG → PNR Apr 24, 12:00 UTCApr 25, 05:50 UTC17h 50m
2026-04-23 AFR947 DLA → CDG Apr 23, 11:20 UTCApr 24, 04:30 UTC17h 9m
2026-04-22 AFR848 DLA → CDG Apr 22, 10:45 UTCApr 23, 06:15 UTC19h 30m
2026-04-20 AFR499 SXM → CDG Apr 20, 08:45 UTCApr 21, 03:50 UTC19h 5m
2026-04-19 AFR947 DLA → CDG Apr 19, 11:00 UTCApr 20, 04:35 UTC17h 35m
2026-04-18 AFR499 SXM → CDG Apr 18, 09:10 UTCApr 19, 04:05 UTC18h 55m
2026-04-18 AFR848 DLA → CDG Apr 18, 05:25 UTCApr 18, 05:55 UTC30m
2026-04-18 AFR848 DLA → CDG Apr 18, 04:45 UTCApr 18, 05:55 UTC1h 10m
2026-04-18 AFR848 DLA → CDG Apr 18, 03:25 UTCApr 18, 05:20 UTC1h 55m
2026-04-17 AFR848 DLA → CDG Apr 17, 11:20 UTCApr 17, 13:15 UTC1h 55m
2026-04-17 AFR848 DLA → CDG Apr 17, 10:45 UTCApr 17, 11:15 UTC30m
2026-04-17 AFR389 - Apr 17, 05:20 UTCApr 17, 05:40 UTC20m
2026-04-17 AFR389 - Apr 17, 04:20 UTCApr 17, 05:15 UTC56m
2026-04-16 AFR388 CMN → LIG Apr 16, 11:09 UTCApr 16, 12:05 UTC55m
2026-04-15 AFR373V - Apr 15, 20:35 UTCApr 15, 21:00 UTC25m
2026-04-13 AFR374V PAE → CDG Apr 13, 07:55 UTCApr 13, 08:10 UTC15m
2026-04-13 AFR374V PAE → CDG Apr 13, 07:25 UTCApr 13, 08:10 UTC45m
2026-04-13 AFR499 - Apr 13, 02:30 UTCApr 13, 03:35 UTC1h 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-GZCK page for operator, model, and routing details .

Mode-S 39644A frequently asked

What is Mode-S code 39644A?
39644A is an ICAO 24-bit transponder address. Allocated to France. Assigned to F-GZCK.
Where is Mode-S 39644A registered?
Mode-S code 39644A is allocated to France (FR). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 39644A broadcasting right now?
No active broadcast right now. Last signal was 3d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 39644A, octal 16262112, decimal 3,761,226.
What flights does 39644A operate?
Mode-S 39644A has broadcast 20 distinct callsigns, including AFR848, AFR499, AFR947, AFR946, AFR863.