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 Jul 26, 18:55 UTC
Flights observed
187
Distinct callsigns
20
Country
FR
Last broadcast
Jul 26, 18:55 UTC

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
AFR828 Air France 7 2026-07-25
AFR500 - 7 2026-07-10
AFR431 Air France 7 2026-07-23
AFR328K - 7 2026-07-04
AFR186 Air France 7 2026-05-28
AFR378E - 6 2026-07-15
AFR377 - 6 2026-07-16
AFR327 - 6 2026-07-04
AFR902 - 5 2026-07-10
AFR501 - 5 2026-07-11
AFR430 Air France 5 2026-07-22
AFR149 Air France 5 2026-07-24
AFR988 - 4 2026-07-21
AFR930 Air France 4 2026-04-16
AFR837 - 4 2026-07-05
AFR829 Air France 4 2026-07-26
AFR804 - 4 2026-07-13
AFR33J Air France 4 2026-06-05
AFR32J Air France 4 2026-06-04

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 AFR344 CDG → YUL Jul 26, 11:55 UTCJul 26, 18:50 UTC6h 55m
2026-07-26 AFR829 COF → COF Jul 26, 01:55 UTCJul 26, 04:40 UTC2h 45m
2026-07-25 AFR828 CDG → NBO Jul 25, 17:20 UTCJul 25, 17:30 UTC10m
2026-07-25 AFR828 CDG → NBO Jul 25, 09:30 UTCJul 25, 12:15 UTC2h 45m
2026-07-24 AFR149 LOS → CDG Jul 24, 15:00 UTCJul 25, 05:35 UTC14h 35m
2026-07-24 AFR35T ATL → CDG Jul 24, 02:45 UTCJul 24, 10:40 UTC7h 55m
2026-07-23 AFR34N CDG → ATL Jul 23, 14:45 UTCJul 23, 23:20 UTC8h 35m
2026-07-23 AFR431 SJO → CDG Jul 23, 02:25 UTCJul 23, 11:45 UTC9h 20m
2026-07-23 AFR431 SJO → CDG Jul 23, 01:25 UTCJul 23, 01:30 UTC5m
2026-07-22 AFR430 CDG → SJO Jul 22, 12:25 UTCJul 22, 22:40 UTC10h 15m
2026-07-22 AFR989 - Jul 22, 01:40 UTCJul 22, 03:40 UTC2h 0m
2026-07-21 AFR988 - Jul 21, 16:20 UTCJul 21, 16:30 UTC10m
2026-07-21 AFR988 - Jul 21, 09:55 UTCJul 21, 11:25 UTC1h 30m
2026-07-20 AFR283 CDG → NRT Jul 20, 19:55 UTCJul 21, 04:30 UTC8h 35m
2026-07-20 AFR284 NRT → CDG Jul 20, 09:30 UTCJul 20, 16:50 UTC7h 20m
2026-07-18 AFR989 - Jul 18, 20:35 UTCJul 19, 03:25 UTC6h 50m
2026-07-18 AFR988 - Jul 18, 16:30 UTCJul 18, 16:50 UTC20m
2026-07-18 AFR988 - Jul 18, 10:00 UTCJul 18, 11:35 UTC1h 35m
2026-07-17 AFR217 BOM → CDG Jul 17, 21:10 UTCJul 18, 06:05 UTC8h 56m
2026-07-17 AFR218 - Jul 17, 10:00 UTCJul 17, 18:44 UTC8h 45m
2026-07-16 AFR149 - Jul 16, 14:25 UTCJul 17, 04:59 UTC14h 35m
2026-07-16 AFR377 - Jul 16, 01:35 UTCJul 16, 08:55 UTC7h 20m
2026-07-15 AFR378E - Jul 15, 14:35 UTCJul 15, 22:20 UTC7h 45m
2026-07-15 AFR431 SJO → CDG Jul 15, 01:20 UTCJul 15, 11:20 UTC10h 0m
2026-07-14 AFR430 - Jul 14, 12:20 UTCJul 14, 22:50 UTC10h 29m
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

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 Jul 26, 18:55 UTC.
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, AFR828, AFR500, AFR431, AFR328K.