Apparatus

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sensors Mode-S transponder

3949EC

ICAO 24-bit transponder address · allocated to France

Currently assigned to F-GSPM · BOEING 777-200

Hex
3949EC
Octal
16244754
Decimal
3,754,476
Country
FR
Tail
F-GSPM
Type
B772
No current signal · last broadcast 1h ago
Flights observed
144
Distinct callsigns
20
Country
FR
Last broadcast
1h ago

Last known position

Most recent position reported by Mode-S 3949EC.

Country allocation

The ICAO 24-bit address 3949EC 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 - 19 2026-06-26
AFR935 - 9 2026-06-18
AFR284 - 6 2026-07-10
AFR283 - 6 2026-07-10
AFR149 - 6 2026-07-13
AFR501 - 4 2026-07-12
AFR940 Air France 3 2026-05-23
AFR934 - 3 2026-06-17
AFR923 Air France 3 2026-06-03
AFR500 - 3 2026-07-11
AFR217 Air France 3 2026-05-13
AFR187 Air France 3 2026-06-01
AFR186 Air France 3 2026-05-31
AFR111 Air France 3 2026-04-22
AFR988 - 2 2026-07-14
AFR926 Air France 2 2026-05-23
AFR82M Air France 2 2026-06-10
AFR828 Air France 2 2026-05-19
AFR59N Air France 2 2026-06-09
AFR58P Air France 2 2026-06-08

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 AFR988 - Jul 14, 16:20 UTCJul 14, 16:30 UTC10m
2026-07-14 AFR988 - Jul 14, 09:50 UTCJul 14, 11:20 UTC1h 30m
2026-07-13 AFR149 - Jul 13, 14:05 UTCJul 14, 05:05 UTC15h 0m
2026-07-13 AFR35T ATL → CDG Jul 13, 02:50 UTCJul 13, 10:45 UTC7h 55m
2026-07-12 AFR34N - Jul 12, 15:05 UTCJul 12, 23:35 UTC8h 30m
2026-07-12 AFR501 - Jul 12, 00:55 UTCJul 12, 11:10 UTC10h 15m
2026-07-11 AFR500 - Jul 11, 09:10 UTCJul 11, 20:50 UTC11h 40m
2026-07-10 AFR283 - Jul 10, 19:50 UTCJul 11, 04:20 UTC8h 30m
2026-07-10 AFR284 - Jul 10, 09:50 UTCJul 10, 17:10 UTC7h 20m
2026-07-08 AFR380V - Jul 8, 20:15 UTCJul 9, 06:20 UTC10h 5m
2026-07-05 AFR430 - Jul 5, 12:25 UTCJul 5, 22:40 UTC10h 15m
2026-07-01 AFR443 - Jul 1, 04:00 UTCJul 1, 14:45 UTC10h 45m
2026-06-30 AFR442 CDG → GIG Jun 30, 12:05 UTCJun 30, 22:45 UTC10h 40m
2026-06-29 AFR359P - Jun 29, 03:49 UTCJun 29, 10:34 UTC6h 45m
2026-06-28 AFR358P - Jun 28, 16:55 UTCJun 29, 00:24 UTC7h 30m
2026-06-27 AFR501 - Jun 27, 20:09 UTCJun 28, 11:59 UTC15h 50m
2026-06-27 AFR501 - Jun 27, 11:04 UTCJun 28, 11:00 UTC23h 55m
2026-06-27 AFR500 - Jun 27, 09:40 UTCJun 28, 08:44 UTC23h 5m
2026-06-26 AFR837 - Jun 26, 09:05 UTCJun 27, 04:05 UTC19h 0m
2026-06-26 AFR837 - Jun 26, 08:40 UTCJun 27, 04:05 UTC19h 25m
2026-06-25 AFR837 - Jun 25, 09:05 UTCJun 26, 04:10 UTC19h 5m
2026-06-25 AFR837 - Jun 25, 08:34 UTCJun 26, 04:10 UTC19h 35m
2026-06-24 AFR283 DEL → CDG Jun 24, 19:55 UTCJun 25, 04:14 UTC8h 20m
2026-06-24 AFR284 - Jun 24, 09:15 UTCJun 24, 16:59 UTC7h 45m
2026-06-23 AFR149 - Jun 23, 14:49 UTCJun 24, 05:54 UTC15h 5m
2026-06-22 AFR337P - Jun 22, 20:55 UTCJun 23, 06:04 UTC9h 10m
2026-06-22 AFR338 - Jun 22, 08:40 UTCJun 22, 18:15 UTC9h 35m
2026-06-21 AFR837 - Jun 21, 09:04 UTCJun 22, 04:00 UTC18h 55m
2026-06-21 AFR837 - Jun 21, 08:10 UTCJun 22, 04:00 UTC19h 50m
2026-06-20 AFR181 - Jun 20, 03:19 UTCJun 20, 16:24 UTC13h 5m
2026-06-19 AFR182 - Jun 19, 11:45 UTCJun 20, 00:04 UTC12h 20m
2026-06-19 AFR33J ATL → CDG Jun 19, 01:10 UTCJun 19, 08:50 UTC7h 40m
2026-06-18 AFR32J CDG → ATL Jun 18, 12:30 UTCJun 18, 22:05 UTC9h 35m
2026-06-18 AFR935 - Jun 18, 05:40 UTCJun 18, 08:25 UTC2h 45m
2026-06-17 AFR935 - Jun 17, 11:05 UTCJun 18, 08:25 UTC21h 20m
2026-06-17 AFR934 - Jun 17, 09:20 UTCJun 18, 08:25 UTC23h 5m
2026-06-16 AFR837 - Jun 16, 09:04 UTCJun 17, 03:50 UTC18h 46m
2026-06-16 AFR836 - Jun 16, 08:00 UTCJun 17, 03:50 UTC19h 51m
2026-06-15 AFR837 - Jun 15, 09:05 UTCJun 16, 03:55 UTC18h 50m
2026-06-15 AFR837 - Jun 15, 08:25 UTCJun 16, 03:55 UTC19h 30m
2026-06-14 AFR1U JFK → CDG Jun 14, 21:15 UTCJun 15, 03:35 UTC6h 19m
2026-06-14 AFR2N - Jun 14, 07:10 UTCJun 14, 14:20 UTC7h 10m
2026-06-13 AFR181 SIN → CDG Jun 13, 03:20 UTCJun 13, 16:40 UTC13h 19m
2026-06-12 AFR182 CDG → SIN Jun 12, 11:40 UTCJun 12, 23:55 UTC12h 15m
2026-06-11 AFR081 SFO → CDG Jun 11, 04:10 UTCJun 11, 14:05 UTC9h 55m
2026-06-10 AFR82M CDG → SFO Jun 10, 14:15 UTCJun 11, 01:00 UTC10h 45m
2026-06-10 AFR33J ATL → CDG Jun 10, 00:30 UTCJun 10, 08:30 UTC8h 0m
2026-06-09 AFR32J CDG → ATL Jun 9, 12:30 UTCJun 9, 21:15 UTC8h 45m
2026-06-09 AFR59N DEN → CDG Jun 9, 00:40 UTCJun 9, 09:15 UTC8h 35m
2026-06-08 AFR58P CDG → DEN Jun 8, 11:50 UTCJun 8, 21:20 UTC9h 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-GSPM page for operator, model, and routing details .

Mode-S 3949EC frequently asked

What is Mode-S code 3949EC?
3949EC is an ICAO 24-bit transponder address. Allocated to France. Assigned to F-GSPM.
Where is Mode-S 3949EC registered?
Mode-S code 3949EC is allocated to France (FR). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 3949EC broadcasting right now?
No active broadcast right now. Last signal was 1h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 3949EC, octal 16244754, decimal 3,754,476.
What flights does 3949EC operate?
Mode-S 3949EC has broadcast 20 distinct callsigns, including AFR837, AFR935, AFR284, AFR283, AFR149.