Apparatus

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sensors Mode-S transponder

3949F4

ICAO 24-bit transponder address · allocated to France

Currently assigned to F-GSPU · BOEING 777-200

Hex
3949F4
Octal
16244764
Decimal
3,754,484
Country
FR
Tail
F-GSPU
Type
B772
No current signal · last broadcast 6h ago
Flights observed
163
Distinct callsigns
20
Country
FR
Last broadcast
6h ago

Last known position

Most recent position reported by Mode-S 3949F4.

Country allocation

The ICAO 24-bit address 3949F4 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
AFR935 - 14 2026-06-14
AFR500 - 7 2026-07-10
AFR328K - 7 2026-07-04
AFR186 Air France 7 2026-05-28
AFR327 - 6 2026-07-04
AFR902 - 5 2026-07-10
AFR828 - 5 2026-06-20
AFR501 - 5 2026-07-11
AFR378E - 5 2026-07-11
AFR377 - 5 2026-07-12
AFR930 Air France 4 2026-04-16
AFR837 - 4 2026-07-05
AFR804 - 4 2026-07-13
AFR431 - 4 2026-07-13
AFR430 - 4 2026-07-14
AFR33J Air France 4 2026-06-05
AFR32J Air France 4 2026-06-04
AFR187 Air France 4 2026-05-29
AFR934 Air France 3 2026-06-08
AFR933 Air France 3 2026-04-17

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 AFR430 - Jul 14, 12:20 UTCJul 14, 13:45 UTC1h 25m
2026-07-13 AFR804 - Jul 13, 14:35 UTCJul 14, 05:20 UTC14h 45m
2026-07-13 AFR431 SJO → CDG Jul 13, 01:30 UTCJul 13, 11:30 UTC10h 0m
2026-07-12 AFR430 - Jul 12, 12:01 UTCJul 12, 22:25 UTC10h 25m
2026-07-12 AFR377 - Jul 12, 01:30 UTCJul 12, 08:55 UTC7h 25m
2026-07-11 AFR378E - Jul 11, 14:30 UTCJul 11, 22:30 UTC8h 0m
2026-07-11 AFR501 - Jul 11, 00:40 UTCJul 11, 11:05 UTC10h 25m
2026-07-10 AFR500 - Jul 10, 08:50 UTCJul 10, 20:30 UTC11h 40m
2026-07-10 AFR902 - Jul 10, 02:25 UTCJul 10, 04:10 UTC1h 45m
2026-07-09 AFR902 - Jul 9, 21:20 UTCJul 9, 21:35 UTC15m
2026-07-09 AFR902 - Jul 9, 19:00 UTCJul 9, 19:10 UTC10m
2026-07-09 AFR902 - Jul 9, 10:15 UTCJul 9, 11:45 UTC1h 30m
2026-07-08 AFR804 - Jul 8, 15:05 UTCJul 9, 07:00 UTC15h 55m
2026-07-08 AFR431 - Jul 8, 10:00 UTCJul 8, 11:35 UTC1h 35m
2026-07-08 AFR431 - Jul 8, 01:40 UTCJul 8, 01:50 UTC10m
2026-07-07 AFR430 - Jul 7, 12:40 UTCJul 7, 22:55 UTC10h 15m
2026-07-06 AFR989 - Jul 6, 10:15 UTCJul 7, 03:50 UTC17h 35m
2026-07-05 AFR837 - Jul 5, 09:05 UTCJul 6, 03:35 UTC18h 30m
2026-07-05 AFR836 - Jul 5, 08:45 UTCJul 6, 03:00 UTC18h 15m
2026-07-04 AFR327 - Jul 4, 22:00 UTCJul 5, 04:00 UTC6h 0m
2026-07-04 AFR328K - Jul 4, 18:40 UTCJul 4, 19:45 UTC1h 5m
2026-07-04 AFR328K - Jul 4, 12:20 UTCJul 4, 18:25 UTC6h 5m
2026-07-04 AFR89U - Jul 4, 01:20 UTCJul 4, 08:50 UTC7h 30m
2026-07-03 AFR088 - Jul 3, 14:15 UTCJul 3, 22:55 UTC8h 40m
2026-07-03 AFR359P - Jul 3, 03:50 UTCJul 3, 10:30 UTC6h 40m
2026-07-02 AFR358P - Jul 2, 16:55 UTCJul 3, 00:45 UTC7h 50m
2026-07-02 AFR431 - Jul 2, 01:40 UTCJul 2, 11:35 UTC9h 55m
2026-07-01 AFR430 - Jul 1, 12:15 UTCJul 1, 22:45 UTC10h 30m
2026-07-01 AFR377 - Jul 1, 01:45 UTCJul 1, 08:50 UTC7h 5m
2026-06-30 AFR378E - Jun 30, 14:45 UTCJun 30, 22:45 UTC8h 0m
2026-06-29 AFR501 - Jun 29, 19:15 UTCJun 30, 11:30 UTC16h 15m
2026-06-29 AFR500 - Jun 29, 11:04 UTCJun 30, 11:00 UTC23h 56m
2026-06-29 AFR500 - Jun 29, 08:54 UTCJun 30, 01:04 UTC16h 10m
2026-06-28 AFR902 - Jun 28, 11:59 UTCJun 29, 05:34 UTC17h 35m
2026-06-27 AFR201 - Jun 27, 15:39 UTCJun 28, 03:40 UTC12h 0m
2026-06-27 AFR202 - Jun 27, 06:50 UTCJun 27, 07:04 UTC15m
2026-06-26 AFR202 - Jun 26, 21:04 UTCJun 27, 01:15 UTC4h 10m
2026-06-26 AFR35T ATL → CDG Jun 26, 04:00 UTCJun 26, 11:34 UTC7h 35m
2026-06-25 AFR34N CDG → ATL Jun 25, 16:39 UTCJun 26, 01:34 UTC8h 55m
2026-06-24 AFR501 - Jun 24, 17:14 UTCJun 25, 12:44 UTC19h 30m
2026-06-24 AFR500 - Jun 24, 09:05 UTCJun 25, 05:15 UTC20h 10m
2026-06-21 AFR829 - Jun 21, 01:39 UTCJun 21, 04:34 UTC2h 55m
2026-06-20 AFR828 - Jun 20, 17:34 UTCJun 20, 17:49 UTC15m
2026-06-20 AFR828 - Jun 20, 09:34 UTCJun 20, 13:24 UTC3h 50m
2026-06-19 AFR443 - Jun 19, 01:45 UTCJun 19, 12:14 UTC10h 30m
2026-06-18 AFR442 CDG → GIG Jun 18, 22:30 UTCJun 18, 22:40 UTC10m
2026-06-18 AFR442 CDG → GIG Jun 18, 12:15 UTCJun 18, 21:40 UTC9h 25m
2026-06-18 AFR829 - Jun 18, 01:05 UTCJun 18, 04:55 UTC3h 50m
2026-06-17 AFR828 - Jun 17, 17:45 UTCJun 17, 17:55 UTC10m
2026-06-17 AFR828 - Jun 17, 09:55 UTCJun 17, 13:25 UTC3h 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-GSPU page for operator, model, and routing details .

Mode-S 3949F4 frequently asked

What is Mode-S code 3949F4?
3949F4 is an ICAO 24-bit transponder address. Allocated to France. Assigned to F-GSPU.
Where is Mode-S 3949F4 registered?
Mode-S code 3949F4 is allocated to France (FR). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 3949F4 broadcasting right now?
No active broadcast right now. Last signal was 6h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 3949F4, octal 16244764, decimal 3,754,484.
What flights does 3949F4 operate?
Mode-S 3949F4 has broadcast 20 distinct callsigns, including AFR935, AFR500, AFR328K, AFR186, AFR327.