Apparatus

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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 1h ago
Flights observed
150
Distinct callsigns
20
Country
FR
Last broadcast
1h 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
AFR257 - 10 2026-07-08
AFR256 Air France 10 2026-07-07
AFR274 - 9 2026-07-12
AFR23G - 9 2026-07-09
AFR22J - 9 2026-07-09
AFR24X Air France 8 2026-06-29
AFR8U Air France 7 2026-05-04
AFR279 Air France 7 2026-06-27
AFR091 - 7 2026-07-03
AFR090 Air France 7 2026-07-02
AFR025 - 7 2026-06-30
AFR004 - 7 2026-06-28
AFR5U - 6 2026-06-22
AFR2N Air France 6 2026-05-19
AFR006 - 6 2026-06-22
AFR3T - 5 2026-06-28
AFR1U Air France 5 2026-05-19
AFR007 - 5 2026-05-05
AFR89U - 2 2026-07-11
AFR718 Air France 2 2026-06-30

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-13 AFR293 HND → CDG Jul 13, 15:25 UTCJul 14, 05:40 UTC14h 15m
2026-07-12 AFR274 - Jul 12, 21:20 UTCJul 13, 09:55 UTC12h 35m
2026-07-11 AFR702 - Jul 11, 12:55 UTCJul 12, 04:01 UTC15h 5m
2026-07-11 AFR89U - Jul 11, 02:00 UTCJul 11, 09:35 UTC7h 35m
2026-07-10 AFR088 - Jul 10, 14:40 UTCJul 10, 23:00 UTC8h 20m
2026-07-09 AFR23G - Jul 9, 22:20 UTCJul 10, 08:30 UTC10h 10m
2026-07-09 AFR22J - Jul 9, 09:20 UTCJul 9, 20:00 UTC10h 40m
2026-07-08 AFR257 - Jul 8, 15:00 UTCJul 9, 03:50 UTC12h 50m
2026-07-07 AFR256 CDG → SIN Jul 7, 21:40 UTCJul 8, 09:50 UTC12h 10m
2026-07-06 AFR293 HND → CDG Jul 6, 15:35 UTCJul 7, 05:45 UTC14h 10m
2026-07-05 AFR274 CDG → HND Jul 5, 21:25 UTCJul 6, 09:55 UTC12h 30m
2026-07-05 AFR963 - Jul 5, 14:00 UTCJul 5, 18:20 UTC4h 20m
2026-07-05 AFR966 - Jul 5, 08:00 UTCJul 5, 11:40 UTC3h 40m
2026-07-04 AFR257 SIN → CDG Jul 4, 14:45 UTCJul 5, 03:45 UTC13h 0m
2026-07-03 AFR256 CDG → SIN Jul 3, 21:40 UTCJul 4, 09:55 UTC12h 15m
2026-07-03 AFR091 - Jul 3, 00:50 UTCJul 3, 09:00 UTC8h 10m
2026-07-02 AFR090 CDG → MIA Jul 2, 12:35 UTCJul 2, 21:40 UTC9h 5m
2026-07-01 AFR23G - Jul 1, 22:30 UTCJul 2, 08:10 UTC9h 40m
2026-07-01 AFR22J CDG → LAX Jul 1, 09:15 UTCJul 1, 20:05 UTC10h 50m
2026-06-30 AFR719 DSS → CDG Jun 30, 23:25 UTCJul 1, 04:40 UTC5h 15m
2026-06-30 AFR718 CDG → DSS Jun 30, 20:25 UTCJun 30, 20:40 UTC15m
2026-06-30 AFR718 CDG → DSS Jun 30, 15:50 UTCJun 30, 18:05 UTC2h 15m
2026-06-30 AFR025 - Jun 30, 01:40 UTCJun 30, 11:55 UTC10h 15m
2026-06-29 AFR24X CDG → LAX Jun 29, 12:05 UTCJun 29, 22:49 UTC10h 45m
2026-06-28 AFR3T - Jun 28, 22:04 UTCJun 29, 04:45 UTC6h 40m
2026-06-28 AFR004 - Jun 28, 08:55 UTCJun 28, 16:19 UTC7h 25m
2026-06-27 AFR279 HND → CDG Jun 27, 13:15 UTCJun 28, 03:25 UTC14h 10m
2026-06-26 AFR274 CDG → HND Jun 26, 21:35 UTCJun 27, 10:25 UTC12h 50m
2026-06-26 AFR091 - Jun 26, 00:50 UTCJun 26, 09:00 UTC8h 10m
2026-06-25 AFR090 CDG → MIA Jun 25, 13:24 UTCJun 25, 22:14 UTC8h 50m
2026-06-24 AFR23G - Jun 24, 22:39 UTCJun 25, 08:55 UTC10h 15m
2026-06-24 AFR22J CDG → LAX Jun 24, 09:09 UTCJun 24, 19:59 UTC10h 50m
2026-06-23 AFR3T JFK → CDG Jun 23, 22:05 UTCJun 24, 04:30 UTC6h 25m
2026-06-23 AFR004 - Jun 23, 09:14 UTCJun 23, 16:44 UTC7h 30m
2026-06-22 AFR5U JFK → CDG Jun 22, 23:20 UTCJun 23, 05:59 UTC6h 40m
2026-06-22 AFR006 - Jun 22, 12:05 UTCJun 22, 19:40 UTC7h 35m
2026-06-21 AFR021 LAX → CDG Jun 21, 21:29 UTCJun 22, 07:45 UTC10h 15m
2026-06-21 AFR020 CDG → LAX Jun 21, 07:59 UTCJun 21, 19:00 UTC11h 0m
2026-06-20 AFR257 SIN → CDG Jun 20, 14:44 UTCJun 21, 03:49 UTC13h 5m
2026-06-19 AFR256 CDG → SIN Jun 19, 22:30 UTCJun 20, 10:20 UTC11h 50m
2026-06-18 AFR279 HND → CDG Jun 18, 13:45 UTCJun 19, 04:10 UTC14h 24m
2026-06-17 AFR274 CDG → HND Jun 17, 21:25 UTCJun 18, 10:20 UTC12h 55m
2026-06-17 AFR89U MSP → CDG Jun 17, 03:40 UTCJun 17, 11:25 UTC7h 45m
2026-06-16 AFR088 CDG → SFO Jun 16, 16:55 UTCJun 17, 01:00 UTC8h 6m
2026-06-16 AFR009 JFK → CDG Jun 16, 04:05 UTCJun 16, 10:35 UTC6h 30m
2026-06-15 AFR010 CDG → JFK Jun 15, 16:55 UTCJun 16, 00:35 UTC7h 40m
2026-06-15 AFR025 - Jun 15, 01:40 UTCJun 15, 12:00 UTC10h 20m
2026-06-14 AFR24X CDG → LAX Jun 14, 11:50 UTCJun 14, 22:30 UTC10h 40m
2026-06-13 AFR5U JFK → CDG Jun 13, 22:55 UTCJun 14, 05:20 UTC6h 25m
2026-06-13 AFR006 - Jun 13, 12:10 UTCJun 13, 19:35 UTC7h 25m

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 1h 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 AFR257, AFR256, AFR274, AFR23G, AFR22J.