Apparatus

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sensors Mode-S transponder

3949EA

ICAO 24-bit transponder address · allocated to France

Currently assigned to F-GSPK · BOEING 777-200

Hex
3949EA
Octal
16244752
Decimal
3,754,474
Country
FR
Tail
F-GSPK
Type
B772
No current signal · last broadcast 2h ago
Flights observed
173
Distinct callsigns
20
Country
FR
Last broadcast
2h ago

Last known position

Most recent position reported by Mode-S 3949EA.

Country allocation

The ICAO 24-bit address 3949EA 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
AFR837 - 11 2026-07-13
AFR828 - 10 2026-07-14
AFR359P - 7 2026-05-31
AFR284 - 7 2026-07-12
AFR283 - 7 2026-07-12
AFR442 Air France 6 2026-05-13
AFR358P Air France 6 2026-05-30
AFR33J - 6 2026-06-23
AFR32J Air France 6 2026-06-22
AFR829 Air France 5 2026-06-02
AFR902 - 4 2026-06-15
AFR805 Air France 4 2026-06-08
AFR218 - 4 2026-07-08
AFR217 - 4 2026-07-08
AFR132 - 4 2026-06-24
AFR98G - 3 2026-07-02
AFR989 - 3 2026-06-27
AFR923 Air France 3 2026-04-18
AFR89U Air France 3 2026-06-24
AFR804 Air France 3 2026-05-03

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 AFR828 - Jul 14, 17:50 UTCJul 14, 18:00 UTC10m
2026-07-14 AFR828 - Jul 14, 10:05 UTCJul 14, 13:25 UTC3h 20m
2026-07-13 AFR837 - Jul 13, 08:35 UTCJul 14, 03:40 UTC19h 5m
2026-07-13 AFR837 - Jul 13, 08:25 UTCJul 14, 03:40 UTC19h 15m
2026-07-12 AFR283 - Jul 12, 19:50 UTCJul 13, 04:20 UTC8h 30m
2026-07-12 AFR284 - Jul 12, 09:25 UTCJul 12, 16:45 UTC7h 20m
2026-07-11 AFR1U JFK → CDG Jul 11, 21:55 UTCJul 12, 04:20 UTC6h 25m
2026-07-11 AFR2N - Jul 11, 07:00 UTCJul 11, 14:30 UTC7h 30m
2026-07-10 AFR837 - Jul 10, 08:35 UTCJul 11, 03:55 UTC19h 20m
2026-07-10 AFR837 - Jul 10, 08:25 UTCJul 11, 03:55 UTC19h 31m
2026-07-09 AFR837 - Jul 9, 08:35 UTCJul 10, 04:10 UTC19h 35m
2026-07-08 AFR217 - Jul 8, 20:15 UTCJul 9, 05:20 UTC9h 5m
2026-07-08 AFR218 - Jul 8, 09:20 UTCJul 8, 17:40 UTC8h 20m
2026-07-07 AFR283 - Jul 7, 19:55 UTCJul 8, 04:25 UTC8h 30m
2026-07-07 AFR284 - Jul 7, 09:20 UTCJul 7, 16:40 UTC7h 20m
2026-07-06 AFR149 - Jul 6, 14:55 UTCJul 7, 05:50 UTC14h 55m
2026-07-06 AFR35T - Jul 6, 03:05 UTCJul 6, 10:55 UTC7h 50m
2026-07-05 AFR34N - Jul 5, 15:15 UTCJul 6, 00:10 UTC8h 55m
2026-07-04 AFR837 - Jul 4, 08:35 UTCJul 5, 04:00 UTC19h 25m
2026-07-04 AFR837 - Jul 4, 08:25 UTCJul 5, 04:00 UTC19h 35m
2026-07-03 AFR327 - Jul 3, 22:30 UTCJul 4, 04:35 UTC6h 5m
2026-07-03 AFR328K - Jul 3, 12:50 UTCJul 3, 20:10 UTC7h 20m
2026-07-03 AFR099 - Jul 3, 00:35 UTCJul 3, 09:35 UTC9h 0m
2026-07-02 AFR98G - Jul 2, 11:40 UTCJul 2, 21:45 UTC10h 5m
2026-07-01 AFR099 - Jul 1, 23:45 UTCJul 2, 08:30 UTC8h 45m
2026-07-01 AFR98G - Jul 1, 10:35 UTCJul 1, 20:35 UTC10h 0m
2026-06-30 AFR099 - Jun 30, 22:45 UTCJul 1, 07:35 UTC8h 50m
2026-06-30 AFR98G - Jun 30, 10:15 UTCJun 30, 19:55 UTC9h 40m
2026-06-29 AFR877 JRO → CDG Jun 29, 10:34 UTCJun 30, 06:10 UTC19h 36m
2026-06-29 AFR877 JRO → CDG Jun 29, 08:54 UTCJun 30, 06:10 UTC21h 16m
2026-06-28 AFR69AU - Jun 28, 11:59 UTCJun 28, 12:44 UTC45m
2026-06-28 AFR26SM - Jun 28, 09:15 UTCJun 28, 09:55 UTC40m
2026-06-27 AFR989 - Jun 27, 10:05 UTCJun 28, 04:05 UTC18h 0m
2026-06-26 AFR283 - Jun 26, 20:00 UTCJun 27, 04:15 UTC8h 15m
2026-06-26 AFR284 - Jun 26, 09:55 UTCJun 26, 17:25 UTC7h 30m
2026-06-25 AFR327 - Jun 25, 21:59 UTCJun 26, 04:20 UTC6h 20m
2026-06-25 AFR328K - Jun 25, 11:50 UTCJun 25, 18:59 UTC7h 10m
2026-06-24 AFR132 - Jun 24, 14:29 UTCJun 25, 05:39 UTC15h 10m
2026-06-24 AFR89U MSP → CDG Jun 24, 01:34 UTCJun 24, 09:00 UTC7h 25m
2026-06-23 AFR088 CDG → SFO Jun 23, 14:29 UTCJun 23, 23:05 UTC8h 35m
2026-06-23 AFR33J ATL → CDG Jun 23, 00:24 UTCJun 23, 08:04 UTC7h 40m
2026-06-22 AFR32J CDG → ATL Jun 22, 12:40 UTCJun 22, 21:40 UTC9h 0m
2026-06-21 AFR217 - Jun 21, 20:45 UTCJun 22, 05:49 UTC9h 5m
2026-06-21 AFR218 - Jun 21, 09:24 UTCJun 21, 17:39 UTC8h 15m
2026-06-20 AFR989 - Jun 20, 09:39 UTCJun 21, 04:14 UTC18h 35m
2026-06-19 AFR149 - Jun 19, 14:09 UTCJun 20, 05:49 UTC15h 40m
2026-06-18 AFR75K - Jun 18, 22:45 UTCJun 19, 05:49 UTC7h 4m
2026-06-18 AFR074 - Jun 18, 11:35 UTCJun 18, 20:10 UTC8h 35m
2026-06-18 AFR33J - Jun 18, 00:15 UTCJun 18, 08:05 UTC7h 50m
2026-06-17 AFR32J CDG → ATL Jun 17, 12:55 UTCJun 17, 21:40 UTC8h 45m

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

Mode-S 3949EA frequently asked

What is Mode-S code 3949EA?
3949EA is an ICAO 24-bit transponder address. Allocated to France. Assigned to F-GSPK.
Where is Mode-S 3949EA registered?
Mode-S code 3949EA is allocated to France (FR). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 3949EA broadcasting right now?
No active broadcast right now. Last signal was 2h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 3949EA, octal 16244752, decimal 3,754,474.
What flights does 3949EA operate?
Mode-S 3949EA has broadcast 20 distinct callsigns, including AFR837, AFR828, AFR359P, AFR284, AFR283.