sensors Mode-S transponder

3949F4

ICAO 24-bit transponder address · allocated to France

Currently assigned to F-GSPU · BOEING 777-200

Hex
3949F4
Octal
16244764
Decimal
3,754,484
Country
FR
Tail
F-GSPU
Type
B772
No current signal · last broadcast 1h ago
Flights observed
80
Distinct callsigns
20
Country
FR
Last broadcast
1h ago

Last known position

Most recent position reported by Mode-S 3949F4.

Country allocation

The ICAO 24-bit address 3949F4 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 7 2026-05-28
AFR930 Air France 4 2026-04-16
AFR187 Air France 4 2026-05-29
AFR935 Air France 3 2026-05-09
AFR933 Air France 3 2026-04-17
AFR837 Air France 3 2026-04-24
AFR500 Air France 3 2026-04-28
AFR33J Air France 3 2026-05-07
AFR32J Air France 3 2026-05-06
AFR328K Air France 3 2026-04-17
AFR327 Air France 3 2026-04-18
AFR149 Air France 3 2026-05-23
AFR706 Air France 2 2026-05-04
AFR501 Air France 2 2026-04-28
AFR378E Air France 2 2026-05-01
AFR377 Air France 2 2026-05-02
AFR218 Air France 2 2026-05-26
AFR111 Air France 2 2026-05-15
AFR934 Air France 1 2026-05-08
AFR923 Air France 1 2026-05-16

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-05-30 AFR551 CAI → CDG May 30, 01:35 UTCMay 30, 05:40 UTC4h 5m
2026-05-29 AFR570 CDG → CAI May 29, 19:35 UTCMay 29, 23:00 UTC3h 25m
2026-05-29 AFR187 CDG → LAS May 29, 00:35 UTCMay 29, 14:55 UTC14h 20m
2026-05-28 AFR186 LAS → CDG May 28, 08:40 UTCMay 28, 21:00 UTC12h 20m
2026-05-27 AFR343 YUL → CDG May 27, 21:20 UTCMay 28, 03:40 UTC6h 20m
2026-05-27 AFR342T CDG → YUL May 27, 09:05 UTCMay 27, 15:50 UTC6h 45m
2026-05-26 AFR217 BOM → CDG May 26, 20:29 UTCMay 27, 05:55 UTC9h 25m
2026-05-26 AFR218 CDG → BOM May 26, 09:15 UTCMay 26, 17:39 UTC8h 25m
2026-05-25 AFR829 COF → COF May 25, 01:55 UTCMay 25, 04:55 UTC3h 0m
2026-05-24 AFR828 CDG → NBO May 24, 09:30 UTCMay 24, 13:05 UTC3h 35m
2026-05-23 AFR149 LOS → CDG May 23, 14:00 UTCMay 24, 05:30 UTC15h 31m
2026-05-23 AFR217A - May 23, 00:50 UTCMay 23, 10:15 UTC9h 24m
2026-05-21 AFR218 CDG → BOM May 21, 09:20 UTCMay 21, 18:05 UTC8h 45m
2026-05-16 AFR923 LBV → CDG May 16, 09:06 UTCMay 17, 04:05 UTC19h 0m
2026-05-15 AFR111 PVG → CDG May 15, 22:50 UTCMay 16, 03:25 UTC4h 35m
2026-05-14 AFR116 CDG → PVG May 14, 22:00 UTCMay 15, 00:35 UTC2h 35m
2026-05-14 AFR187 CDG → LAS May 14, 00:25 UTCMay 14, 14:20 UTC13h 55m
2026-05-13 AFR186 LAS → CDG May 13, 07:50 UTCMay 13, 20:45 UTC12h 55m
2026-05-11 AFR149 LOS → CDG May 11, 14:00 UTCMay 12, 06:15 UTC16h 15m
2026-05-10 AFR804 CDG → COO May 10, 15:05 UTCMay 11, 06:10 UTC15h 5m
2026-05-09 AFR357E YYZ → CDG May 9, 22:15 UTCMay 10, 05:14 UTC7h 0m
2026-05-09 AFR356G CDG → YYZ May 9, 12:05 UTCMay 9, 19:40 UTC7h 35m
2026-05-09 AFR935 TNR → CDG May 9, 05:05 UTCMay 9, 08:40 UTC3h 35m
2026-05-08 AFR935 TNR → CDG May 8, 11:05 UTCMay 9, 08:40 UTC21h 35m
2026-05-08 AFR935 TNR → CDG May 8, 09:04 UTCMay 9, 08:40 UTC23h 35m
2026-05-08 AFR934 CDG → TNR May 8, 08:59 UTCMay 9, 07:00 UTC22h 0m
2026-05-07 AFR33J ATL → CDG May 7, 00:55 UTCMay 7, 09:05 UTC8h 10m
2026-05-06 AFR32J CDG → ATL May 6, 12:10 UTCMay 6, 21:20 UTC9h 9m
2026-05-06 AFR33J ATL → CDG May 6, 00:10 UTCMay 6, 08:15 UTC8h 5m
2026-05-05 AFR32J CDG → ATL May 5, 12:30 UTCMay 5, 21:15 UTC8h 45m
2026-05-04 AFR706 ABJ → DSS May 4, 17:00 UTCMay 5, 08:40 UTC15h 41m
2026-05-04 AFR137T ORD → CDG May 4, 00:05 UTCMay 4, 07:55 UTC7h 50m
2026-05-03 AFR136 CDG → ORD May 3, 11:30 UTCMay 3, 19:50 UTC8h 20m
2026-05-03 AFR33J ATL → CDG May 3, 00:15 UTCMay 3, 08:10 UTC7h 54m
2026-05-02 AFR32J CDG → ATL May 2, 12:40 UTCMay 2, 21:50 UTC9h 10m
2026-05-02 AFR377 DTW → CDG May 2, 01:30 UTCMay 2, 09:00 UTC7h 30m
2026-05-01 AFR378E CDG → DTW May 1, 14:40 UTCMay 1, 22:40 UTC8h 0m
2026-04-30 AFR805 COO → CDG Apr 30, 15:10 UTCMay 1, 07:45 UTC16h 35m
2026-04-30 AFR377 DTW → CDG Apr 30, 01:30 UTCApr 30, 08:50 UTC7h 20m
2026-04-29 AFR378E CDG → DTW Apr 29, 14:35 UTCApr 29, 22:25 UTC7h 50m
2026-04-28 AFR501 ABJ → ACC Apr 28, 23:40 UTCApr 29, 10:55 UTC11h 16m
2026-04-28 AFR500 ACC → ABJ Apr 28, 08:40 UTCApr 28, 19:40 UTC11h 0m
2026-04-27 AFR149 LOS → CDG Apr 27, 13:50 UTCApr 28, 05:35 UTC15h 45m
2026-04-26 AFR706 ABJ → DSS Apr 26, 16:40 UTCApr 27, 07:40 UTC15h 0m
2026-04-26 AFR093 MIA → CDG Apr 26, 03:35 UTCApr 26, 11:50 UTC8h 15m
2026-04-25 AFR092 CDG → MIA Apr 25, 15:25 UTCApr 26, 00:40 UTC9h 15m
2026-04-24 AFR837 DLA → CDG Apr 24, 09:05 UTCApr 25, 03:55 UTC18h 50m
2026-04-24 AFR836 CDG → NBO Apr 24, 08:00 UTCApr 25, 03:55 UTC19h 55m
2026-04-23 AFR1U JFK → CDG Apr 23, 21:00 UTCApr 24, 03:50 UTC6h 50m
2026-04-23 AFR2N CDG → JFK Apr 23, 06:50 UTCApr 23, 13:50 UTC7h 0m

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

Mode-S 3949F4 frequently asked

What is Mode-S code 3949F4?
3949F4 is an ICAO 24-bit transponder address. Allocated to France. Assigned to F-GSPU.
Where is Mode-S 3949F4 registered?
Mode-S code 3949F4 is allocated to France (FR). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 3949F4 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 3949F4, octal 16244764, decimal 3,754,484.
What flights does 3949F4 operate?
Mode-S 3949F4 has broadcast 20 distinct callsigns, including AFR186, AFR930, AFR187, AFR935, AFR933.