sensors Mode-S transponder

3949EF

ICAO 24-bit transponder address · allocated to France

Currently assigned to F-GSPP · BOEING 777-200

Hex
3949EF
Octal
16244757
Decimal
3,754,479
Country
FR
Tail
F-GSPP
Type
B772
No current signal · last broadcast 2h ago
Flights observed
98
Distinct callsigns
20
Country
FR
Last broadcast
2h ago

Last known position

Most recent position reported by Mode-S 3949EF.

Country allocation

The ICAO 24-bit address 3949EF 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
AFR186 Air France 12 2026-05-05
AFR116 Air France 10 2026-05-24
AFR187 Air France 9 2026-05-06
AFR111 Air France 8 2026-05-24
AFR828 Air France 6 2026-05-26
AFR284 Air France 6 2026-05-25
AFR935 Air France 4 2026-05-29
AFR829 Air France 3 2026-05-27
AFR465 Air France 3 2026-05-18
AFR283 Air France 3 2026-05-25
AFR149 Air France 3 2026-04-13
AFR972 Air France 2 2026-04-25
AFR940 Air France 2 2026-05-08
AFR933 Air France 2 2026-05-12
AFR930 Air France 2 2026-05-11
AFR89U Air France 2 2026-05-20
AFR805 Air France 2 2026-05-20
AFR501 Air France 2 2026-05-14
AFR500 Air France 2 2026-05-14
AFR132 Air France 2 2026-05-03

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-05-29 AFR935 TNR → CDG May 29, 09:55 UTCMay 30, 08:55 UTC23h 0m
2026-05-28 AFR357E YYZ → CDG May 28, 22:40 UTCMay 29, 05:35 UTC6h 55m
2026-05-28 AFR356G CDG → YYZ May 28, 12:10 UTCMay 28, 19:25 UTC7h 15m
2026-05-28 AFR935 TNR → CDG May 28, 04:50 UTCMay 28, 08:15 UTC3h 25m
2026-05-27 AFR935 TNR → CDG May 27, 11:50 UTCMay 28, 08:15 UTC20h 25m
2026-05-27 AFR935 TNR → CDG May 27, 09:50 UTCMay 28, 08:15 UTC22h 25m
2026-05-27 AFR934 CDG → TNR May 27, 09:05 UTCMay 28, 07:45 UTC22h 40m
2026-05-27 AFR829 COF → COF May 27, 02:09 UTCMay 27, 04:55 UTC2h 45m
2026-05-26 AFR828 CDG → NBO May 26, 17:59 UTCMay 26, 18:10 UTC10m
2026-05-26 AFR828 CDG → NBO May 26, 09:59 UTCMay 26, 12:54 UTC2h 55m
2026-05-25 AFR283 CDG → NRT May 25, 19:50 UTCMay 26, 04:30 UTC8h 40m
2026-05-25 AFR284 NRT → CDG May 25, 09:40 UTCMay 25, 17:25 UTC7h 45m
2026-05-24 AFR111 PVG → CDG May 24, 23:40 UTCMay 25, 04:05 UTC4h 25m
2026-05-24 AFR116 CDG → PVG May 24, 01:50 UTCMay 24, 23:46 UTC21h 56m
2026-05-23 AFR116 CDG → PVG May 23, 23:50 UTCMay 24, 23:45 UTC23h 55m
2026-05-23 AFR116 CDG → PVG May 23, 21:55 UTCMay 24, 02:15 UTC4h 20m
2026-05-20 AFR805 COO → CDG May 20, 14:45 UTCMay 21, 05:25 UTC14h 40m
2026-05-20 AFR89U MSP → CDG May 20, 01:30 UTCMay 20, 09:00 UTC7h 31m
2026-05-19 AFR088 CDG → SFO May 19, 14:25 UTCMay 19, 23:05 UTC8h 40m
2026-05-18 AFR465 SSA → CDG May 18, 11:50 UTCMay 19, 06:10 UTC18h 19m
2026-05-18 AFR465 SSA → CDG May 18, 09:50 UTCMay 19, 06:10 UTC20h 19m
2026-05-18 AFR465 SSA → CDG May 18, 08:55 UTCMay 19, 06:10 UTC21h 14m
2026-05-17 AFR89U MSP → CDG May 17, 01:50 UTCMay 17, 09:20 UTC7h 30m
2026-05-16 AFR088 CDG → SFO May 16, 14:20 UTCMay 16, 22:50 UTC8h 30m
2026-05-15 AFR805 COO → CDG May 15, 15:20 UTCMay 16, 06:31 UTC15h 11m
2026-05-14 AFR501 ABJ → ACC May 14, 23:50 UTCMay 15, 11:25 UTC11h 35m
2026-05-14 AFR500 ACC → ABJ May 14, 08:30 UTCMay 14, 20:10 UTC11h 40m
2026-05-12 AFR933 LAD → CDG May 12, 21:40 UTCMay 13, 06:20 UTC8h 40m
2026-05-11 AFR930 CDG → LAD May 11, 20:45 UTCMay 12, 05:45 UTC9h 0m
2026-05-11 AFR007 - May 11, 02:25 UTCMay 11, 09:10 UTC6h 45m
2026-05-10 AFR8U CDG → JFK May 10, 15:15 UTCMay 10, 22:40 UTC7h 25m
2026-05-10 AFR501 ABJ → ACC May 10, 00:20 UTCMay 10, 10:19 UTC10h 0m
2026-05-09 AFR500 ACC → ABJ May 9, 08:55 UTCMay 9, 20:15 UTC11h 20m
2026-05-08 AFR940 CDG → COO May 8, 09:49 UTCMay 9, 05:05 UTC19h 15m
2026-05-08 AFR940 CDG → COO May 8, 08:59 UTCMay 9, 05:05 UTC20h 5m
2026-05-07 AFR111 PVG → CDG May 7, 07:55 UTCMay 8, 03:24 UTC19h 29m
2026-05-07 AFR111 PVG → CDG May 7, 01:50 UTCMay 8, 01:45 UTC23h 55m
2026-05-06 AFR111 PVG → CDG May 6, 23:50 UTCMay 7, 23:45 UTC23h 55m
2026-05-06 AFR116 CDG → PVG May 6, 21:45 UTCMay 7, 15:40 UTC17h 55m
2026-05-06 AFR187 CDG → LAS May 6, 00:25 UTCMay 6, 14:20 UTC13h 55m
2026-05-05 AFR186 LAS → CDG May 5, 08:05 UTCMay 5, 20:50 UTC12h 45m
2026-05-03 AFR132 CDG → DFW May 3, 13:50 UTCMay 4, 06:25 UTC16h 35m
2026-05-02 AFR132 CDG → DFW May 2, 14:00 UTCMay 3, 07:35 UTC17h 34m
2026-05-01 AFR111 PVG → CDG May 1, 08:15 UTCMay 2, 03:35 UTC19h 20m
2026-05-01 AFR111 PVG → CDG May 1, 01:50 UTCMay 2, 01:45 UTC23h 55m
2026-04-30 AFR116 CDG → PVG Apr 30, 23:50 UTCMay 1, 23:45 UTC23h 55m
2026-04-30 AFR116 CDG → PVG Apr 30, 21:55 UTCMay 1, 15:40 UTC17h 45m
2026-04-29 AFR804 CDG → COO Apr 29, 14:35 UTCApr 30, 08:25 UTC17h 49m
2026-04-29 AFR33J ATL → CDG Apr 29, 00:34 UTCApr 29, 08:45 UTC8h 10m
2026-04-28 AFR32J CDG → ATL Apr 28, 12:50 UTCApr 28, 21:35 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-GSPP page for operator, model, and routing details .

Mode-S 3949EF frequently asked

What is Mode-S code 3949EF?
3949EF is an ICAO 24-bit transponder address. Allocated to France. Assigned to F-GSPP.
Where is Mode-S 3949EF registered?
Mode-S code 3949EF is allocated to France (FR). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 3949EF 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 3949EF, octal 16244757, decimal 3,754,479.
What flights does 3949EF operate?
Mode-S 3949EF has broadcast 20 distinct callsigns, including AFR186, AFR116, AFR187, AFR111, AFR828.