Apparatus

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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 Jul 26, 10:55 UTC
Flights observed
112
Distinct callsigns
20
Country
FR
Last broadcast
Jul 26, 10:55 UTC

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 - 15 2026-07-20
AFR940 Air France 12 2026-07-26
AFR499 - 10 2026-06-21
AFR947 - 8 2026-07-11
AFR863 Air France 8 2026-07-21
AFR832 - 7 2026-06-28
AFR860 Air France 6 2026-07-25
AFR933 - 4 2026-07-14
AFR930 - 4 2026-07-13
AFR63J - 4 2026-07-08
AFR194 - 4 2026-06-14
AFR191 - 4 2026-06-14
AFR062 - 4 2026-07-08
AFR498 - 3 2026-06-30
AFR374V - 3 2026-06-22
AFR946 Air France 2 2026-05-07
AFR389 - 2 2026-04-17
AFR373V Air France 2 2026-06-25
AFR926 Air France 1 2026-04-28
AFR923 Air France 1 2026-04-29

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 AFR940 CDG → COO Jul 26, 09:20 UTCJul 26, 10:55 UTC1h 35m
2026-07-25 AFR860 CDG → LFW Jul 25, 14:40 UTCJul 26, 04:35 UTC13h 55m
2026-07-24 AFR940 CDG → COO Jul 24, 10:35 UTCJul 25, 04:50 UTC18h 15m
2026-07-24 AFR940 CDG → COO Jul 24, 09:10 UTCJul 25, 04:50 UTC19h 40m
2026-07-22 AFR940 CDG → COO Jul 22, 11:10 UTCJul 23, 05:35 UTC18h 25m
2026-07-22 AFR940 CDG → COO Jul 22, 10:20 UTCJul 23, 05:35 UTC19h 15m
2026-07-21 AFR863 LFW → CDG Jul 21, 14:15 UTCJul 22, 04:30 UTC14h 15m
2026-07-20 AFR848 - Jul 20, 10:45 UTCJul 21, 05:25 UTC18h 39m
2026-07-19 AFR940 CDG → COO Jul 19, 10:35 UTCJul 20, 05:10 UTC18h 35m
2026-07-19 AFR940 CDG → COO Jul 19, 09:20 UTCJul 20, 05:10 UTC19h 50m
2026-07-17 AFR848 - Jul 17, 11:35 UTCJul 18, 05:15 UTC17h 41m
2026-07-16 AFR860 - Jul 16, 14:40 UTCJul 17, 04:29 UTC13h 50m
2026-07-15 AFR848 - Jul 15, 11:35 UTCJul 16, 05:25 UTC17h 50m
2026-07-14 AFR933 - Jul 14, 21:55 UTCJul 15, 06:25 UTC8h 29m
2026-07-13 AFR930 - Jul 13, 20:45 UTCJul 14, 05:10 UTC8h 25m
2026-07-11 AFR947 - Jul 11, 10:45 UTCJul 12, 03:50 UTC17h 5m
2026-07-11 AFR848 - Jul 11, 03:45 UTCJul 11, 06:20 UTC2h 35m
2026-07-10 AFR848 - Jul 10, 12:00 UTCJul 10, 18:35 UTC6h 35m
2026-07-09 AFR333F BOS → CDG Jul 9, 21:30 UTCJul 10, 03:45 UTC6h 15m
2026-07-09 AFR334M - Jul 9, 11:30 UTCJul 9, 18:40 UTC7h 10m
2026-07-08 AFR63J EWR → CDG Jul 8, 23:00 UTCJul 9, 05:50 UTC6h 50m
2026-07-08 AFR062 - Jul 8, 10:55 UTCJul 8, 18:25 UTC7h 30m
2026-07-07 AFR933 - Jul 7, 21:55 UTCJul 8, 06:35 UTC8h 40m
2026-07-06 AFR930 - Jul 6, 20:30 UTCJul 6, 22:15 UTC1h 45m
2026-07-05 AFR63J EWR → CDG Jul 5, 21:15 UTCJul 6, 03:45 UTC6h 30m
2026-07-05 AFR062 - Jul 5, 10:55 UTCJul 5, 18:40 UTC7h 45m
2026-07-04 AFR863 - Jul 4, 14:40 UTCJul 5, 05:10 UTC14h 30m
2026-07-04 AFR331E BOS → CDG Jul 4, 02:10 UTCJul 4, 08:20 UTC6h 10m
2026-07-03 AFR332 - Jul 3, 16:25 UTCJul 3, 23:50 UTC7h 25m
2026-07-02 AFR933 - Jul 2, 22:35 UTCJul 3, 06:55 UTC8h 20m
2026-07-02 AFR930 - Jul 2, 12:00 UTCJul 2, 20:00 UTC8h 0m
2026-06-30 AFR498 - Jun 30, 09:20 UTCJul 1, 04:00 UTC18h 40m
2026-06-29 AFR863 - Jun 29, 14:39 UTCJun 30, 05:10 UTC14h 30m
2026-06-28 AFR832 - Jun 28, 12:05 UTCJun 29, 05:34 UTC17h 30m
2026-06-27 AFR863 - Jun 27, 15:49 UTCJun 28, 07:20 UTC15h 30m
2026-06-26 AFR940 - Jun 26, 10:35 UTCJun 27, 06:05 UTC19h 30m
2026-06-26 AFR940 - Jun 26, 09:20 UTCJun 27, 06:05 UTC20h 45m
2026-06-25 AFR373V PAE → CDG Jun 25, 13:24 UTCJun 25, 14:09 UTC45m
2026-06-22 AFR374V - Jun 22, 07:00 UTCJun 22, 07:40 UTC40m
2026-06-21 AFR499 - Jun 21, 08:49 UTCJun 22, 03:35 UTC18h 45m
2026-06-20 AFR947 - Jun 20, 11:09 UTCJun 21, 04:24 UTC17h 15m
2026-06-19 AFR832 - Jun 19, 12:34 UTCJun 20, 08:05 UTC19h 30m
2026-06-19 AFR832 - Jun 19, 12:19 UTCJun 20, 08:05 UTC19h 45m
2026-06-18 AFR947 - Jun 18, 11:20 UTCJun 19, 04:00 UTC16h 39m
2026-06-17 AFR848 - Jun 17, 11:40 UTCJun 18, 05:55 UTC18h 15m
2026-06-16 AFR933 - Jun 16, 21:35 UTCJun 17, 06:30 UTC8h 55m
2026-06-15 AFR930 CDG → LAD Jun 15, 20:40 UTCJun 15, 22:15 UTC1h 35m
2026-06-14 AFR191 - Jun 14, 20:10 UTCJun 15, 06:35 UTC10h 24m
2026-06-14 AFR194 - Jun 14, 09:05 UTCJun 14, 11:35 UTC2h 30m
2026-06-13 AFR860 CDG → LFW Jun 13, 14:10 UTCJun 14, 05:05 UTC14h 56m

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 Jul 26, 10:55 UTC.
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, AFR940, AFR499, AFR947, AFR863.