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
Broadcasting now · callsign AFR217 · 38,000 ft
Flights observed
166
Distinct callsigns
20
Country
FR
Last broadcast
Jul 26, 16:10 UTC

Current position

3949EC is currently broadcasting. Map zoomed to live position.

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
AFR149 Air France 7 2026-07-18
AFR284 - 6 2026-07-10
AFR283 - 6 2026-07-10
AFR501 - 5 2026-07-16
AFR923 Air France 4 2026-07-24
AFR500 - 4 2026-07-15
AFR940 Air France 3 2026-05-23
AFR934 - 3 2026-06-17
AFR902 - 3 2026-07-19
AFR33J Air France 3 2026-07-23
AFR32J Air France 3 2026-07-22
AFR217 Air France 3 2026-05-13
AFR187 Air France 3 2026-06-01
AFR186 Air France 3 2026-05-31
AFR132 Air France 3 2026-07-26
AFR111 Air France 3 2026-04-22
AFR989 - 2 2026-07-15
AFR988 - 2 2026-07-14

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 AFR132 CDG → DFW Jul 26, 14:30 UTCJul 26, 16:10 UTC1h 40m
2026-07-26 AFR65F EWR → CDG Jul 26, 04:10 UTCJul 26, 10:45 UTC6h 36m
2026-07-25 AFR064 CDG → EWR Jul 25, 18:05 UTCJul 26, 01:25 UTC7h 20m
2026-07-24 AFR923 LBV → CDG Jul 24, 09:55 UTCJul 25, 03:40 UTC17h 45m
2026-07-23 AFR345M YUL → CDG Jul 23, 23:50 UTCJul 24, 05:50 UTC6h 0m
2026-07-23 AFR344 CDG → YUL Jul 23, 12:00 UTCJul 23, 18:55 UTC6h 55m
2026-07-23 AFR33J ATL → CDG Jul 23, 00:35 UTCJul 23, 08:30 UTC7h 55m
2026-07-22 AFR32J CDG → ATL Jul 22, 13:25 UTCJul 22, 22:00 UTC8h 35m
2026-07-22 AFR89U MSP → CDG Jul 22, 02:30 UTCJul 22, 03:15 UTC45m
2026-07-21 AFR088 CDG → SFO Jul 21, 15:25 UTCJul 21, 23:50 UTC8h 25m
2026-07-19 AFR902 CDG → NSI Jul 19, 23:15 UTCJul 20, 05:50 UTC6h 35m
2026-07-19 AFR902 - Jul 19, 20:55 UTCJul 19, 21:05 UTC10m
2026-07-19 AFR902 - Jul 19, 12:10 UTCJul 19, 13:50 UTC1h 40m
2026-07-18 AFR149 LOS → CDG Jul 18, 14:00 UTCJul 19, 05:00 UTC15h 0m
2026-07-18 AFR359P - Jul 18, 03:50 UTCJul 18, 10:45 UTC6h 55m
2026-07-17 AFR358P - Jul 17, 17:15 UTCJul 18, 00:35 UTC7h 20m
2026-07-17 AFR35T ATL → CDG Jul 17, 02:39 UTCJul 17, 10:44 UTC8h 5m
2026-07-16 AFR34N - Jul 16, 14:55 UTCJul 16, 23:55 UTC9h 0m
2026-07-16 AFR501 - Jul 16, 00:25 UTCJul 16, 11:15 UTC10h 50m
2026-07-15 AFR500 - Jul 15, 08:50 UTCJul 15, 20:30 UTC11h 40m
2026-07-15 AFR989 - Jul 15, 02:05 UTCJul 15, 04:00 UTC1h 55m
2026-07-14 AFR989 - Jul 14, 21:15 UTCJul 14, 21:30 UTC15m
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

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?
Yes. Mode-S 3949EC is currently airborne.
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, AFR149, AFR284, AFR283.