sensors Mode-S transponder

394A18

ICAO 24-bit transponder address · allocated to France

Currently assigned to F-GSQY · BOEING 777-300ER

Hex
394A18
Octal
16245030
Decimal
3,754,520
Country
FR
Tail
F-GSQY
Type
B77W
No current signal · last broadcast 2h ago
Flights observed
81
Distinct callsigns
20
Country
FR
Last broadcast
2h ago

Last known position

Most recent position reported by Mode-S 394A18.

Country allocation

The ICAO 24-bit address 394A18 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
AFR8U Air France 7 2026-05-04
AFR2N Air France 6 2026-05-19
AFR24X Air France 6 2026-05-28
AFR256 Air France 5 2026-05-29
AFR23G Air France 5 2026-05-20
AFR22J Air France 5 2026-05-20
AFR1U Air France 5 2026-05-19
AFR025 Air France 5 2026-05-29
AFR007 - 5 2026-05-05
AFR279 Air France 4 2026-05-06
AFR274 Air France 4 2026-05-05
AFR257 Air France 4 2026-05-24
AFR091 Air France 4 2026-05-26
AFR090 Air France 4 2026-05-25
AFR5U Air France 3 2026-05-27
AFR006 - 3 2026-05-27
AFR004 - 2 2026-04-26
AFR003 - 2 2026-04-26
AFR021 Air France 1 2026-05-07
AFR020 Air France 1 2026-05-07

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-05-29 AFR256 CDG → SIN May 29, 21:55 UTCMay 30, 00:35 UTC2h 40m
2026-05-29 AFR025 LAX → CDG May 29, 01:45 UTCMay 29, 12:10 UTC10h 25m
2026-05-28 AFR24X CDG → LAX May 28, 11:55 UTCMay 28, 22:55 UTC11h 0m
2026-05-27 AFR5U JFK → CDG May 27, 23:30 UTCMay 28, 06:10 UTC6h 40m
2026-05-27 AFR006 - May 27, 12:05 UTCMay 27, 19:15 UTC7h 10m
2026-05-26 AFR091 MIA → CDG May 26, 00:24 UTCMay 26, 08:45 UTC8h 20m
2026-05-25 AFR090 CDG → MIA May 25, 12:20 UTCMay 25, 21:15 UTC8h 54m
2026-05-24 AFR257 SIN → CDG May 24, 14:45 UTCMay 25, 03:50 UTC13h 5m
2026-05-23 AFR256 CDG → SIN May 23, 21:45 UTCMay 24, 10:15 UTC12h 30m
2026-05-23 AFR091 MIA → CDG May 23, 01:05 UTCMay 23, 08:55 UTC7h 50m
2026-05-22 AFR090 CDG → MIA May 22, 13:05 UTCMay 22, 22:15 UTC9h 10m
2026-05-22 AFR091 MIA → CDG May 22, 00:25 UTCMay 22, 08:10 UTC7h 45m
2026-05-21 AFR090 CDG → MIA May 21, 12:20 UTCMay 21, 21:30 UTC9h 10m
2026-05-20 AFR23G LAX → CDG May 20, 22:35 UTCMay 21, 08:15 UTC9h 40m
2026-05-20 AFR22J CDG → LAX May 20, 08:40 UTCMay 20, 19:25 UTC10h 45m
2026-05-19 AFR1U JFK → CDG May 19, 22:15 UTCMay 20, 04:50 UTC6h 36m
2026-05-19 AFR2N CDG → JFK May 19, 06:55 UTCMay 19, 14:10 UTC7h 15m
2026-05-18 AFR257 SIN → CDG May 18, 15:05 UTCMay 19, 03:40 UTC12h 34m
2026-05-17 AFR256 CDG → SIN May 17, 21:45 UTCMay 18, 10:15 UTC12h 30m
2026-05-16 AFR23G LAX → CDG May 16, 22:20 UTCMay 17, 08:10 UTC9h 50m
2026-05-16 AFR22J CDG → LAX May 16, 08:41 UTCMay 16, 19:35 UTC10h 55m
2026-05-15 AFR257 SIN → CDG May 15, 14:45 UTCMay 16, 03:45 UTC12h 59m
2026-05-14 AFR256 CDG → SIN May 14, 21:40 UTCMay 15, 09:45 UTC12h 5m
2026-05-09 AFR257 SIN → CDG May 9, 15:00 UTCMay 10, 04:04 UTC13h 5m
2026-05-08 AFR256 CDG → SIN May 8, 21:45 UTCMay 9, 09:35 UTC11h 50m
2026-05-07 AFR021 LAX → CDG May 7, 21:15 UTCMay 8, 07:39 UTC10h 25m
2026-05-07 AFR020 CDG → LAX May 7, 08:00 UTCMay 7, 18:25 UTC10h 25m
2026-05-06 AFR279 HND → CDG May 6, 13:35 UTCMay 7, 03:35 UTC13h 59m
2026-05-05 AFR274 CDG → HND May 5, 21:30 UTCMay 6, 10:30 UTC13h 0m
2026-05-05 AFR007 - May 5, 02:10 UTCMay 5, 08:50 UTC6h 40m
2026-05-04 AFR8U CDG → JFK May 4, 15:00 UTCMay 4, 22:20 UTC7h 21m
2026-05-03 AFR23G LAX → CDG May 3, 22:20 UTCMay 4, 08:35 UTC10h 15m
2026-05-03 AFR22J CDG → LAX May 3, 08:50 UTCMay 3, 19:40 UTC10h 50m
2026-05-02 AFR1U JFK → CDG May 2, 20:45 UTCMay 3, 03:35 UTC6h 49m
2026-05-02 AFR2N CDG → JFK May 2, 07:00 UTCMay 2, 14:15 UTC7h 15m
2026-05-01 AFR279 HND → CDG May 1, 13:15 UTCMay 2, 03:25 UTC14h 10m
2026-04-30 AFR274 CDG → HND Apr 30, 21:20 UTCMay 1, 10:20 UTC13h 0m
2026-04-29 AFR5U JFK → CDG Apr 29, 23:05 UTCApr 30, 06:05 UTC7h 0m
2026-04-29 AFR006 - Apr 29, 12:40 UTCApr 29, 19:45 UTC7h 5m
2026-04-29 AFR091 MIA → CDG Apr 29, 00:25 UTCApr 29, 08:55 UTC8h 30m
2026-04-28 AFR090 CDG → MIA Apr 28, 12:25 UTCApr 28, 21:25 UTC9h 0m
2026-04-27 AFR23G LAX → CDG Apr 27, 22:25 UTCApr 28, 08:25 UTC10h 0m
2026-04-27 AFR22J CDG → LAX Apr 27, 08:45 UTCApr 27, 19:40 UTC10h 55m
2026-04-26 AFR003 - Apr 26, 22:15 UTCApr 27, 05:00 UTC6h 45m
2026-04-26 AFR004 - Apr 26, 09:10 UTCApr 26, 16:20 UTC7h 10m
2026-04-25 AFR279 HND → CDG Apr 25, 13:30 UTCApr 26, 03:30 UTC14h 0m
2026-04-24 AFR274 CDG → HND Apr 24, 21:20 UTCApr 25, 10:00 UTC12h 40m
2026-04-23 AFR23G LAX → CDG Apr 23, 22:30 UTCApr 24, 08:50 UTC10h 20m
2026-04-23 AFR22J CDG → LAX Apr 23, 09:25 UTCApr 23, 20:25 UTC11h 0m
2026-04-21 AFR5U JFK → CDG Apr 21, 23:00 UTCApr 22, 06:01 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-GSQY page for operator, model, and routing details .

Mode-S 394A18 frequently asked

What is Mode-S code 394A18?
394A18 is an ICAO 24-bit transponder address. Allocated to France. Assigned to F-GSQY.
Where is Mode-S 394A18 registered?
Mode-S code 394A18 is allocated to France (FR). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 394A18 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 394A18, octal 16245030, decimal 3,754,520.
What flights does 394A18 operate?
Mode-S 394A18 has broadcast 20 distinct callsigns, including AFR8U, AFR2N, AFR24X, AFR256, AFR23G.