Apparatus

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sensors Mode-S transponder

3964F2

ICAO 24-bit transponder address · allocated to France

Currently assigned to F-GZHS · BOEING 737-800

Hex
3964F2
Octal
16262362
Decimal
3,761,394
Country
FR
Tail
F-GZHS
Type
B738
No current signal · last broadcast 1h ago
Flights observed
175
Distinct callsigns
20
Country
FR
Last broadcast
1h ago

Last known position

Most recent position reported by Mode-S 3964F2.

Country allocation

The ICAO 24-bit address 3964F2 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
FPO444 Europe Airpost 25 2026-05-17
FPO443 Europe Airpost 24 2026-05-17
FPO273 Europe Airpost 19 2026-05-26
FPO274 Europe Airpost 18 2026-05-26
FPO161 Europe Airpost 12 2026-05-30
FPO162 Europe Airpost 11 2026-05-29
FPO172 Europe Airpost 7 2026-05-28
FPO826 - 6 2026-05-18
FPO825 - 6 2026-05-18
FPO171 Europe Airpost 6 2026-05-28
FPO358 Europe Airpost 5 2026-05-12
FPO357 Europe Airpost 5 2026-05-12
FPO736 Europe Airpost 2 2026-05-14
FPO735 Europe Airpost 2 2026-05-14
FPO538 - 2 2026-04-14
FPO537 - 2 2026-04-14
FPO360 Europe Airpost 2 2026-05-05
FPO359 Europe Airpost 2 2026-05-05
FPO276 Europe Airpost 2 2026-04-29
FPO275 Europe Airpost 2 2026-04-29

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-05-30 FPO161 CDG → ALG May 30, 06:20 UTCMay 30, 08:00 UTC1h 40m
2026-05-29 FPO162 ALG → CDG May 29, 16:30 UTCMay 29, 18:35 UTC2h 5m
2026-05-28 FPO171 ORY → ALG May 28, 13:10 UTCMay 28, 15:00 UTC1h 50m
2026-05-28 FPO172 ALG → ORY May 28, 09:50 UTCMay 28, 11:35 UTC1h 45m
2026-05-27 FPO161 CDG → ALG May 27, 06:15 UTCMay 27, 08:10 UTC1h 55m
2026-05-26 FPO162 ALG → CDG May 26, 16:15 UTCMay 26, 18:10 UTC1h 55m
2026-05-26 FPO273 LYS → ALG May 26, 13:04 UTCMay 26, 14:30 UTC1h 25m
2026-05-26 FPO274 ALG → LYS May 26, 09:45 UTCMay 26, 11:15 UTC1h 30m
2026-05-26 FPO161 CDG → ALG May 26, 06:14 UTCMay 26, 08:04 UTC1h 50m
2026-05-24 FPO162 ALG → CDG May 24, 16:35 UTCMay 24, 18:40 UTC2h 5m
2026-05-24 FPO171 ORY → ALG May 24, 13:20 UTCMay 24, 14:55 UTC1h 35m
2026-05-24 FPO172 ALG → ORY May 24, 10:05 UTCMay 24, 12:00 UTC1h 55m
2026-05-24 FPO161 CDG → ALG May 24, 06:20 UTCMay 24, 08:05 UTC1h 45m
2026-05-23 FPO162 ALG → CDG May 23, 16:50 UTCMay 23, 18:45 UTC1h 55m
2026-05-23 FPO171 ORY → ALG May 23, 13:25 UTCMay 23, 15:10 UTC1h 45m
2026-05-23 FPO172 ALG → ORY May 23, 10:00 UTCMay 23, 11:50 UTC1h 50m
2026-05-23 FPO161 CDG → ALG May 23, 06:30 UTCMay 23, 08:20 UTC1h 50m
2026-05-22 FPO162 ALG → CDG May 22, 17:15 UTCMay 22, 19:05 UTC1h 50m
2026-05-22 FPO171 ORY → ALG May 22, 13:45 UTCMay 22, 15:20 UTC1h 35m
2026-05-22 FPO172 ALG → ORY May 22, 10:20 UTCMay 22, 12:15 UTC1h 55m
2026-05-22 FPO161 CDG → ALG May 22, 06:30 UTCMay 22, 08:10 UTC1h 40m
2026-05-21 FPO115 - May 21, 18:20 UTCMay 21, 19:00 UTC40m
2026-05-18 FPO114 - May 18, 16:45 UTCMay 18, 17:10 UTC25m
2026-05-18 FPO826 - May 18, 14:45 UTCMay 18, 15:35 UTC50m
2026-05-18 FPO826 - May 18, 11:15 UTCMay 18, 13:35 UTC2h 20m
2026-05-18 FPO825 - May 18, 07:30 UTCMay 18, 09:45 UTC2h 15m
2026-05-18 FPO825 - May 18, 05:45 UTCMay 18, 06:10 UTC25m
2026-05-17 FPO444 ALG → LIL May 17, 15:10 UTCMay 17, 17:05 UTC1h 55m
2026-05-17 FPO273 LYS → ALG May 17, 12:01 UTCMay 17, 13:15 UTC1h 15m
2026-05-17 FPO274 ALG → LYS May 17, 08:55 UTCMay 17, 10:10 UTC1h 15m
2026-05-17 FPO443 LIL → ALG May 17, 05:15 UTCMay 17, 07:10 UTC1h 55m
2026-05-16 FPO444 ALG → LIL May 16, 14:55 UTCMay 16, 16:55 UTC2h 0m
2026-05-16 FPO273 LYS → ALG May 16, 11:46 UTCMay 16, 13:05 UTC1h 20m
2026-05-16 FPO274 ALG → LYS May 16, 09:01 UTCMay 16, 10:16 UTC1h 15m
2026-05-16 FPO443 LIL → ALG May 16, 05:25 UTCMay 16, 07:05 UTC1h 41m
2026-05-15 FPO444 ALG → LIL May 15, 14:40 UTCMay 15, 16:45 UTC2h 4m
2026-05-15 FPO443 LIL → ALG May 15, 11:05 UTCMay 15, 13:00 UTC1h 55m
2026-05-14 FPO736 MAD → MAD May 14, 14:40 UTCMay 14, 15:30 UTC50m
2026-05-14 FPO736 MAD → MAD May 14, 11:45 UTCMay 14, 13:40 UTC1h 55m
2026-05-14 FPO735 CDG → KAO May 14, 08:15 UTCMay 14, 10:20 UTC2h 5m
2026-05-14 FPO735 CDG → KAO May 14, 06:30 UTCMay 14, 07:05 UTC35m
2026-05-13 FPO444 ALG → LIL May 13, 06:20 UTCMay 13, 12:00 UTC5h 40m
2026-05-12 FPO358 ORN → LIL May 12, 10:40 UTCMay 12, 12:55 UTC2h 15m
2026-05-12 FPO357 LIL → ORN May 12, 06:55 UTCMay 12, 09:15 UTC2h 20m
2026-05-11 FPO826 - May 11, 15:50 UTCMay 11, 16:50 UTC1h 0m
2026-05-11 FPO826 - May 11, 12:40 UTCMay 11, 14:40 UTC2h 0m
2026-05-11 FPO825 - May 11, 08:50 UTCMay 11, 10:45 UTC1h 55m
2026-05-11 FPO825 - May 11, 06:40 UTCMay 11, 07:30 UTC50m
2026-05-10 FPO444 ALG → LIL May 10, 15:09 UTCMay 10, 17:10 UTC2h 0m
2026-05-10 FPO273 LYS → ALG May 10, 12:10 UTCMay 10, 13:40 UTC1h 30m

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

Mode-S 3964F2 frequently asked

What is Mode-S code 3964F2?
3964F2 is an ICAO 24-bit transponder address. Allocated to France. Assigned to F-GZHS.
Where is Mode-S 3964F2 registered?
Mode-S code 3964F2 is allocated to France (FR). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 3964F2 broadcasting right now?
No active broadcast right now. Last signal was 1h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 3964F2, octal 16262362, decimal 3,761,394.
What flights does 3964F2 operate?
Mode-S 3964F2 has broadcast 20 distinct callsigns, including FPO444, FPO443, FPO273, FPO274, FPO161.