Apparatus

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sensors Mode-S transponder

3949E4

ICAO 24-bit transponder address · allocated to France

Currently assigned to F-GSPE · BOEING 777-200

Hex
3949E4
Octal
16244744
Decimal
3,754,468
Country
FR
Tail
F-GSPE
Type
B772
No current signal · last broadcast 6d ago
Flights observed
73
Distinct callsigns
20
Country
FR
Last broadcast
6d ago

Last known position

Most recent position reported by Mode-S 3949E4.

Country allocation

The ICAO 24-bit address 3949E4 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
AFR284 Air France 6 2026-05-23
AFR283 Air France 6 2026-05-23
AFR837 Air France 4 2026-04-20
AFR010 Air France 4 2026-05-21
AFR828 Air France 3 2026-05-02
AFR149 Air France 3 2026-05-17
AFR009 - 3 2026-05-22
AFR989 - 2 2026-05-10
AFR988 Air France 2 2026-05-09
AFR836 - 2 2026-04-14
AFR829 Air France 2 2026-05-03
AFR706 Air France 2 2026-04-22
AFR705 Air France 2 2026-04-13
AFR442 Air France 2 2026-04-23
AFR328K Air France 2 2026-04-27
AFR217 Air France 2 2026-04-18
AFR187 Air France 2 2026-05-13
AFR186 Air France 2 2026-05-12
AFR132 - 2 2026-04-15
AFR116 Air France 2 2026-05-13

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-05-23 AFR283 CDG → NRT May 23, 19:50 UTCMay 24, 04:20 UTC8h 30m
2026-05-23 AFR284 NRT → CDG May 23, 09:20 UTCMay 23, 16:55 UTC7h 35m
2026-05-22 AFR804 CDG → COO May 22, 15:10 UTCMay 23, 05:35 UTC14h 24m
2026-05-22 AFR009 - May 22, 02:10 UTCMay 22, 08:30 UTC6h 20m
2026-05-21 AFR010 CDG → JFK May 21, 03:05 UTCMay 21, 03:35 UTC30m
2026-05-20 AFR010 CDG → JFK May 20, 16:50 UTCMay 21, 01:30 UTC8h 40m
2026-05-19 AFR283 CDG → NRT May 19, 19:45 UTCMay 20, 04:05 UTC8h 20m
2026-05-19 AFR284 NRT → CDG May 19, 09:35 UTCMay 19, 17:30 UTC7h 55m
2026-05-18 AFR343 YUL → CDG May 18, 22:45 UTCMay 19, 05:00 UTC6h 15m
2026-05-18 AFR342T CDG → YUL May 18, 09:10 UTCMay 18, 16:10 UTC7h 0m
2026-05-17 AFR149 LOS → CDG May 17, 14:20 UTCMay 18, 06:25 UTC16h 5m
2026-05-17 AFR359P - May 17, 03:35 UTCMay 17, 10:15 UTC6h 40m
2026-05-16 AFR358P CDG → YYZ May 16, 17:01 UTCMay 17, 00:40 UTC7h 40m
2026-05-16 AFR009 JFK → CDG May 16, 03:55 UTCMay 16, 10:20 UTC6h 26m
2026-05-15 AFR010 CDG → JFK May 15, 16:55 UTCMay 16, 00:20 UTC7h 25m
2026-05-14 AFR111 PVG → CDG May 14, 19:25 UTCMay 15, 03:15 UTC7h 50m
2026-05-14 AFR111 PVG → CDG May 14, 01:25 UTCMay 15, 01:00 UTC23h 35m
2026-05-13 AFR116 CDG → PVG May 13, 23:05 UTCMay 14, 23:00 UTC23h 55m
2026-05-13 AFR116 CDG → PVG May 13, 21:55 UTCMay 14, 19:25 UTC21h 30m
2026-05-13 AFR187 CDG → LAS May 13, 00:15 UTCMay 13, 14:25 UTC14h 10m
2026-05-12 AFR186 LAS → CDG May 12, 08:00 UTCMay 12, 20:45 UTC12h 45m
2026-05-11 AFR187 CDG → LAS May 11, 00:10 UTCMay 11, 14:25 UTC14h 15m
2026-05-10 AFR186 LAS → CDG May 10, 08:20 UTCMay 10, 21:04 UTC12h 45m
2026-05-10 AFR989 - May 10, 01:34 UTCMay 10, 03:55 UTC2h 20m
2026-05-09 AFR989 - May 9, 20:49 UTCMay 9, 21:09 UTC20m
2026-05-09 AFR988 POB → POB May 9, 15:55 UTCMay 9, 16:00 UTC5m
2026-05-09 AFR988 POB → POB May 9, 09:25 UTCMay 9, 11:05 UTC1h 40m
2026-05-08 AFR357E YYZ → CDG May 8, 22:15 UTCMay 9, 05:00 UTC6h 45m
2026-05-08 AFR356G CDG → YYZ May 8, 12:04 UTCMay 8, 19:45 UTC7h 40m
2026-05-08 AFR377 DTW → CDG May 8, 01:09 UTCMay 8, 08:05 UTC6h 55m
2026-05-07 AFR378E CDG → DTW May 7, 14:05 UTCMay 7, 22:15 UTC8h 10m
2026-05-06 AFR283 CDG → NRT May 6, 19:45 UTCMay 7, 04:05 UTC8h 20m
2026-05-06 AFR284 NRT → CDG May 6, 09:20 UTCMay 6, 16:55 UTC7h 35m
2026-05-05 AFR283 CDG → NRT May 5, 19:45 UTCMay 6, 04:10 UTC8h 25m
2026-05-05 AFR284 NRT → CDG May 5, 09:15 UTCMay 5, 16:55 UTC7h 40m
2026-05-04 AFR923 LBV → CDG May 4, 09:05 UTCMay 5, 03:35 UTC18h 31m
2026-05-03 AFR283 CDG → NRT May 3, 20:00 UTCMay 4, 04:20 UTC8h 20m
2026-05-03 AFR284 NRT → CDG May 3, 09:35 UTCMay 3, 18:00 UTC8h 25m
2026-05-03 AFR829 COF → COF May 3, 02:25 UTCMay 3, 05:30 UTC3h 4m
2026-05-02 AFR828 CDG → NBO May 2, 10:50 UTCMay 2, 13:35 UTC2h 45m
2026-04-28 AFR283 CDG → NRT Apr 28, 20:10 UTCApr 29, 04:55 UTC8h 45m
2026-04-28 AFR284 NRT → CDG Apr 28, 09:10 UTCApr 28, 16:45 UTC7h 35m
2026-04-27 AFR327 YOW → CDG Apr 27, 22:20 UTCApr 28, 04:45 UTC6h 25m
2026-04-27 AFR328K CDG → YOW Apr 27, 17:35 UTCApr 27, 18:50 UTC1h 15m
2026-04-27 AFR328K CDG → YOW Apr 27, 11:50 UTCApr 27, 17:30 UTC5h 40m
2026-04-26 AFR081 SFO → CDG Apr 26, 05:35 UTCApr 26, 15:20 UTC9h 45m
2026-04-25 AFR82M CDG → SFO Apr 25, 16:25 UTCApr 26, 02:55 UTC10h 30m
2026-04-25 AFR009 JFK → CDG Apr 25, 03:40 UTCApr 25, 10:20 UTC6h 40m
2026-04-24 AFR010 CDG → JFK Apr 24, 16:45 UTCApr 24, 23:40 UTC6h 55m
2026-04-24 AFR443 GIG → CDG Apr 24, 01:20 UTCApr 24, 11:50 UTC10h 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-GSPE page for operator, model, and routing details .

Mode-S 3949E4 frequently asked

What is Mode-S code 3949E4?
3949E4 is an ICAO 24-bit transponder address. Allocated to France. Assigned to F-GSPE.
Where is Mode-S 3949E4 registered?
Mode-S code 3949E4 is allocated to France (FR). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 3949E4 broadcasting right now?
No active broadcast right now. Last signal was 6d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 3949E4, octal 16244744, decimal 3,754,468.
What flights does 3949E4 operate?
Mode-S 3949E4 has broadcast 20 distinct callsigns, including AFR284, AFR283, AFR837, AFR010, AFR828.