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 3h ago
Flights observed
165
Distinct callsigns
20
Country
FR
Last broadcast
3h 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 - 15 2026-07-11
AFR283 - 15 2026-07-11
AFR828 - 12 2026-07-10
AFR874 - 10 2026-07-09
AFR837 - 9 2026-07-12
AFR217 - 9 2026-07-13
AFR218 - 8 2026-07-13
AFR829 - 6 2026-07-11
AFR378E - 4 2026-06-24
AFR377 - 4 2026-06-25
AFR328K - 4 2026-06-26
AFR132 - 4 2026-07-14
AFR010 Air France 4 2026-05-21
AFR877 Air France 3 2026-07-03
AFR836 - 3 2026-06-20
AFR327 - 3 2026-06-26
AFR149 Air France 3 2026-05-17
AFR009 - 3 2026-05-22
AFR989 - 2 2026-05-10
AFR988 Air France 2 2026-05-09

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 AFR132 - Jul 14, 14:35 UTCJul 14, 16:45 UTC2h 10m
2026-07-13 AFR217 - Jul 13, 21:25 UTCJul 14, 06:35 UTC9h 10m
2026-07-13 AFR218 - Jul 13, 10:45 UTCJul 13, 18:55 UTC8h 10m
2026-07-12 AFR837 - Jul 12, 09:05 UTCJul 13, 03:50 UTC18h 45m
2026-07-12 AFR837 - Jul 12, 08:45 UTCJul 13, 03:50 UTC19h 5m
2026-07-11 AFR283 - Jul 11, 19:50 UTCJul 12, 04:15 UTC8h 25m
2026-07-11 AFR284 - Jul 11, 09:30 UTCJul 11, 16:40 UTC7h 10m
2026-07-11 AFR829 - Jul 11, 02:00 UTCJul 11, 04:40 UTC2h 40m
2026-07-10 AFR828 - Jul 10, 17:35 UTCJul 10, 17:45 UTC10m
2026-07-10 AFR828 - Jul 10, 13:05 UTCJul 10, 13:15 UTC10m
2026-07-10 AFR828 - Jul 10, 09:35 UTCJul 10, 12:50 UTC3h 15m
2026-07-09 AFR874 - Jul 9, 11:05 UTCJul 10, 06:40 UTC19h 35m
2026-07-09 AFR874 - Jul 9, 09:05 UTCJul 10, 06:40 UTC21h 35m
2026-07-09 AFR874 - Jul 9, 08:55 UTCJul 10, 06:40 UTC21h 45m
2026-07-08 AFR1U - Jul 8, 21:35 UTCJul 9, 04:10 UTC6h 35m
2026-07-08 AFR2N CDG → JFK Jul 8, 06:50 UTCJul 8, 13:55 UTC7h 5m
2026-07-06 AFR283 DEL → CDG Jul 6, 19:50 UTCJul 7, 04:15 UTC8h 25m
2026-07-06 AFR284 - Jul 6, 09:45 UTCJul 6, 17:15 UTC7h 30m
2026-07-05 AFR805 - Jul 5, 14:50 UTCJul 6, 05:40 UTC14h 50m
2026-07-05 AFR59N - Jul 5, 00:40 UTCJul 5, 09:20 UTC8h 40m
2026-07-04 AFR58P - Jul 4, 12:15 UTCJul 4, 22:00 UTC9h 45m
2026-07-03 AFR877 JRO → CDG Jul 3, 11:05 UTCJul 4, 06:10 UTC19h 5m
2026-07-03 AFR877 JRO → CDG Jul 3, 09:05 UTCJul 4, 06:10 UTC21h 5m
2026-07-03 AFR877 JRO → CDG Jul 3, 08:55 UTCJul 4, 06:10 UTC21h 15m
2026-07-02 AFR217 - Jul 2, 20:20 UTCJul 3, 05:15 UTC8h 55m
2026-07-02 AFR218 - Jul 2, 09:40 UTCJul 2, 17:55 UTC8h 15m
2026-07-01 AFR283 DEL → CDG Jul 1, 21:00 UTCJul 2, 05:20 UTC8h 20m
2026-07-01 AFR284 - Jul 1, 10:25 UTCJul 1, 18:00 UTC7h 35m
2026-06-30 AFR217 - Jun 30, 21:00 UTCJul 1, 05:50 UTC8h 50m
2026-06-30 AFR218 - Jun 30, 10:25 UTCJun 30, 18:40 UTC8h 15m
2026-06-28 AFR874 - Jun 28, 11:04 UTCJun 29, 06:05 UTC19h 0m
2026-06-28 AFR874 - Jun 28, 09:05 UTCJun 29, 06:05 UTC21h 0m
2026-06-28 AFR874 - Jun 28, 08:59 UTCJun 29, 06:05 UTC21h 5m
2026-06-27 AFR283 DEL → CDG Jun 27, 20:19 UTCJun 28, 04:40 UTC8h 20m
2026-06-27 AFR284 - Jun 27, 09:19 UTCJun 27, 16:44 UTC7h 25m
2026-06-26 AFR327 YOW → CDG Jun 26, 21:50 UTCJun 27, 04:05 UTC6h 15m
2026-06-26 AFR328K CDG → YOW Jun 26, 11:49 UTCJun 26, 18:49 UTC7h 0m
2026-06-26 AFR33J ATL → CDG Jun 26, 00:24 UTCJun 26, 08:05 UTC7h 40m
2026-06-25 AFR32J CDG → ATL Jun 25, 12:30 UTCJun 25, 21:29 UTC9h 0m
2026-06-25 AFR377 - Jun 25, 01:04 UTCJun 25, 08:04 UTC7h 0m
2026-06-24 AFR378E - Jun 24, 14:39 UTCJun 24, 22:35 UTC7h 55m
2026-06-23 AFR837 - Jun 23, 09:05 UTCJun 24, 04:00 UTC18h 55m
2026-06-23 AFR837 - Jun 23, 08:15 UTCJun 24, 04:00 UTC19h 45m
2026-06-22 AFR283 DEL → CDG Jun 22, 20:00 UTCJun 23, 04:25 UTC8h 25m
2026-06-22 AFR284 - Jun 22, 09:40 UTCJun 22, 17:04 UTC7h 25m
2026-06-21 AFR283 - Jun 21, 19:55 UTCJun 22, 04:15 UTC8h 20m
2026-06-21 AFR284 - Jun 21, 09:24 UTCJun 21, 16:59 UTC7h 35m
2026-06-20 AFR837 - Jun 20, 09:05 UTCJun 21, 03:49 UTC18h 45m
2026-06-20 AFR836 - Jun 20, 08:14 UTCJun 21, 03:49 UTC19h 35m
2026-06-19 AFR283 DEL → CDG Jun 19, 19:49 UTCJun 20, 04:04 UTC8h 15m

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 3h 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, AFR828, AFR874, AFR837.