sensors Mode-S transponder

3949E5

ICAO 24-bit transponder address · allocated to France

Currently assigned to F-GSPF · BOEING 777-200

Hex
3949E5
Octal
16244745
Decimal
3,754,469
Country
FR
Tail
F-GSPF
Type
B772
No current signal · last broadcast 1h ago
Flights observed
69
Distinct callsigns
20
Country
FR
Last broadcast
1h ago

Last known position

Most recent position reported by Mode-S 3949E5.

Country allocation

The ICAO 24-bit address 3949E5 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 Air France 6 2026-05-25
AFR284 Air France 6 2026-05-29
AFR283 Air France 6 2026-05-29
AFR378E Air France 5 2026-05-26
AFR829 Air France 4 2026-04-26
AFR828 Air France 4 2026-04-25
AFR377 Air France 4 2026-05-27
AFR465 Air France 3 2026-04-27
AFR218 Air France 3 2026-05-31
AFR217 Air France 3 2026-05-31
AFR705 Air France 2 2026-04-29
AFR59N Air France 2 2026-06-02
AFR58P Air France 2 2026-06-01
AFR357E Air France 2 2026-05-01
AFR149 Air France 2 2026-05-16
AFR111 Air France 2 2026-05-18
AFR89U Air France 1 2026-05-22
AFR836 Air France 1 2026-05-30
AFR804 Air France 1 2026-05-07
AFR443 Air France 1 2026-04-23

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-06-02 AFR064 CDG → EWR Jun 2, 18:00 UTCJun 3, 01:15 UTC7h 15m
2026-06-02 AFR59N DEN → CDG Jun 2, 00:30 UTCJun 2, 09:20 UTC8h 50m
2026-06-01 AFR58P CDG → DEN Jun 1, 11:45 UTCJun 1, 21:25 UTC9h 40m
2026-05-31 AFR217 BOM → CDG May 31, 23:05 UTCJun 1, 08:25 UTC9h 20m
2026-05-31 AFR218 CDG → BOM May 31, 12:00 UTCMay 31, 20:10 UTC8h 10m
2026-05-30 AFR836 CDG → NBO May 30, 08:20 UTCMay 30, 09:50 UTC1h 30m
2026-05-29 AFR283 CDG → NRT May 29, 19:55 UTCMay 30, 04:30 UTC8h 35m
2026-05-29 AFR284 NRT → CDG May 29, 09:20 UTCMay 29, 17:00 UTC7h 40m
2026-05-28 AFR283 CDG → NRT May 28, 19:50 UTCMay 29, 04:35 UTC8h 45m
2026-05-28 AFR284 NRT → CDG May 28, 09:30 UTCMay 28, 17:30 UTC8h 0m
2026-05-27 AFR377 DTW → CDG May 27, 01:05 UTCMay 27, 08:20 UTC7h 16m
2026-05-26 AFR378E CDG → DTW May 26, 14:24 UTCMay 26, 22:15 UTC7h 50m
2026-05-25 AFR837 DLA → CDG May 25, 09:20 UTCMay 26, 03:50 UTC18h 29m
2026-05-25 AFR837 DLA → CDG May 25, 08:40 UTCMay 26, 03:50 UTC19h 9m
2026-05-22 AFR010 CDG → JFK May 22, 16:50 UTCMay 22, 18:55 UTC2h 5m
2026-05-22 AFR89U MSP → CDG May 22, 01:30 UTCMay 22, 08:50 UTC7h 20m
2026-05-21 AFR088 CDG → SFO May 21, 14:15 UTCMay 21, 22:25 UTC8h 10m
2026-05-21 AFR377 DTW → CDG May 21, 03:20 UTCMay 21, 10:00 UTC6h 40m
2026-05-20 AFR378E CDG → DTW May 20, 22:40 UTCMay 21, 00:10 UTC1h 30m
2026-05-20 AFR378E CDG → DTW May 20, 14:05 UTCMay 20, 21:15 UTC7h 10m
2026-05-20 AFR59N DEN → CDG May 20, 00:55 UTCMay 20, 09:35 UTC8h 41m
2026-05-19 AFR58P CDG → DEN May 19, 12:50 UTCMay 19, 22:30 UTC9h 40m
2026-05-18 AFR111 PVG → CDG May 18, 15:05 UTCMay 19, 03:20 UTC12h 14m
2026-05-18 AFR111 PVG → CDG May 18, 08:45 UTCMay 19, 03:20 UTC18h 34m
2026-05-17 AFR116 CDG → PVG May 17, 22:35 UTCMay 18, 15:20 UTC16h 45m
2026-05-16 AFR149 LOS → CDG May 16, 14:20 UTCMay 17, 05:25 UTC15h 5m
2026-05-09 AFR132 CDG → DFW May 9, 14:05 UTCMay 10, 05:50 UTC15h 45m
2026-05-08 AFR345M YUL → CDG May 8, 23:25 UTCMay 9, 05:50 UTC6h 25m
2026-05-08 AFR344 CDG → YUL May 8, 12:14 UTCMay 8, 19:15 UTC7h 0m
2026-05-07 AFR804 CDG → COO May 7, 14:45 UTCMay 8, 06:30 UTC15h 45m
2026-05-06 AFR149 LOS → CDG May 6, 14:00 UTCMay 7, 05:10 UTC15h 9m
2026-05-06 AFR837 DLA → CDG May 6, 00:31 UTCMay 6, 03:55 UTC3h 25m
2026-05-05 AFR837 DLA → CDG May 5, 08:10 UTCMay 6, 03:55 UTC19h 45m
2026-05-04 AFR283 CDG → NRT May 4, 19:45 UTCMay 5, 04:20 UTC8h 35m
2026-05-04 AFR284 NRT → CDG May 4, 09:20 UTCMay 4, 17:15 UTC7h 55m
2026-05-01 AFR217 BOM → CDG May 1, 21:30 UTCMay 2, 05:50 UTC8h 20m
2026-05-01 AFR217 BOM → CDG May 1, 20:35 UTCMay 1, 20:45 UTC10m
2026-05-01 AFR218 CDG → BOM May 1, 17:25 UTCMay 1, 18:20 UTC55m
2026-05-01 AFR218 CDG → BOM May 1, 09:20 UTCMay 1, 16:45 UTC7h 25m
2026-05-01 AFR357E YYZ → CDG May 1, 03:55 UTCMay 1, 05:40 UTC1h 45m
2026-04-30 AFR357E YYZ → CDG Apr 30, 22:45 UTCMay 1, 00:00 UTC1h 15m
2026-04-30 AFR356G CDG → YYZ Apr 30, 12:20 UTCApr 30, 19:35 UTC7h 15m
2026-04-29 AFR705 ABJ → CDG Apr 29, 16:55 UTCApr 30, 08:20 UTC15h 24m
2026-04-29 AFR377 DTW → CDG Apr 29, 01:35 UTCApr 29, 09:00 UTC7h 26m
2026-04-28 AFR378E CDG → DTW Apr 28, 14:45 UTCApr 28, 22:35 UTC7h 50m
2026-04-27 AFR465 SSA → CDG Apr 27, 11:35 UTCApr 28, 06:10 UTC18h 35m
2026-04-27 AFR465 SSA → CDG Apr 27, 09:20 UTCApr 28, 06:10 UTC20h 50m
2026-04-27 AFR465 SSA → CDG Apr 27, 08:35 UTCApr 28, 06:10 UTC21h 35m
2026-04-26 AFR283 CDG → NRT Apr 26, 19:45 UTCApr 27, 04:20 UTC8h 35m
2026-04-26 AFR284 NRT → CDG Apr 26, 09:20 UTCApr 26, 17:05 UTC7h 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-GSPF page for operator, model, and routing details .

Mode-S 3949E5 frequently asked

What is Mode-S code 3949E5?
3949E5 is an ICAO 24-bit transponder address. Allocated to France. Assigned to F-GSPF.
Where is Mode-S 3949E5 registered?
Mode-S code 3949E5 is allocated to France (FR). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 3949E5 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 3949E5, octal 16244745, decimal 3,754,469.
What flights does 3949E5 operate?
Mode-S 3949E5 has broadcast 20 distinct callsigns, including AFR837, AFR284, AFR283, AFR378E, AFR829.