Apparatus

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sensors Mode-S transponder

399452

ICAO 24-bit transponder address · allocated to France

Currently assigned to F-HFCS · HAWKER BEECHCRAFT Hawker 750/850

Hex
399452
Octal
16312122
Decimal
3,773,522
Country
FR
Tail
F-HFCS
Type
H25B
No current signal · last broadcast 4d ago
Flights observed
118
Distinct callsigns
20
Country
FR
Last broadcast
4d ago

Last known position

Most recent position reported by Mode-S 399452.

Country allocation

The ICAO 24-bit address 399452 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
VLJ014F - 13 2026-07-14
VLJ813E - 5 2026-06-10
VLJ178F - 5 2026-05-21
FHFCS - 5 2026-07-02
VLJ601E - 4 2026-05-17
VLJ559R - 4 2026-04-27
VLJ523A - 4 2026-05-07
VLJ449L - 4 2026-05-25
VLJ209T - 4 2026-05-11
VLJ105F - 4 2026-04-15
VLJ712Z - 3 2026-06-07
VLJ646L - 3 2026-06-25
VLJ628D - 3 2026-06-29
VLJ553E - 3 2026-06-28
VLJ511H - 3 2026-07-05
VLJ490R - 3 2026-06-15
VLJ285K - 3 2026-05-01
VLJ282J - 3 2026-06-12
VLJ157W - 3 2026-05-27
VLJ071D - 3 2026-05-26

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 VLJ014F - Jul 14, 17:25 UTCJul 14, 18:20 UTC55m
2026-07-14 VLJ014F - Jul 14, 09:10 UTCJul 14, 09:25 UTC15m
2026-07-14 VLJ014F - Jul 14, 07:35 UTCJul 14, 08:15 UTC40m
2026-07-11 VLJ014F - Jul 11, 16:35 UTCJul 11, 17:25 UTC50m
2026-07-11 VLJ014F - Jul 11, 09:15 UTCJul 11, 09:25 UTC10m
2026-07-11 VLJ014F - Jul 11, 07:55 UTCJul 11, 08:40 UTC45m
2026-07-10 VLJ014F BOD → LBG Jul 10, 16:40 UTCJul 10, 17:35 UTC55m
2026-07-10 VLJ014F - Jul 10, 09:15 UTCJul 10, 09:45 UTC30m
2026-07-10 VLJ014F - Jul 10, 07:00 UTCJul 10, 08:00 UTC1h 0m
2026-07-09 VLJ014F - Jul 9, 17:05 UTCJul 9, 18:10 UTC1h 5m
2026-07-09 VLJ014F - Jul 9, 05:45 UTCJul 9, 06:50 UTC1h 5m
2026-07-08 VLJ014F - Jul 8, 17:20 UTCJul 8, 18:20 UTC1h 0m
2026-07-08 VLJ014F - Jul 8, 07:35 UTCJul 8, 08:30 UTC55m
2026-07-05 VLJ511H - Jul 5, 08:00 UTCJul 5, 08:55 UTC55m
2026-07-05 VLJ511H - Jul 5, 05:05 UTCJul 5, 06:45 UTC1h 40m
2026-07-05 VLJ511H - Jul 5, 02:15 UTCJul 5, 04:00 UTC1h 45m
2026-07-04 VLJ580G - Jul 4, 08:10 UTCJul 4, 10:30 UTC2h 20m
2026-07-03 VLJ580G - Jul 3, 14:10 UTCJul 3, 15:45 UTC1h 35m
2026-07-03 VLJ916Z - Jul 3, 12:10 UTCJul 3, 13:00 UTC50m
2026-07-03 VLJ916Z GVA → BOD Jul 3, 09:45 UTCJul 3, 10:40 UTC55m
2026-07-02 FHFCS - Jul 2, 12:30 UTCJul 2, 14:15 UTC1h 45m
2026-07-02 FHFCS - Jul 2, 10:30 UTCJul 2, 11:00 UTC30m
2026-07-01 FHFCS - Jul 1, 11:05 UTCJul 1, 11:35 UTC30m
2026-07-01 FHFCS GVA → KRK Jul 1, 07:30 UTCJul 1, 09:10 UTC1h 40m
2026-07-01 FHFCS - Jul 1, 04:55 UTCJul 1, 05:40 UTC45m
2026-06-29 VLJ628D - Jun 29, 19:29 UTCJun 29, 20:19 UTC50m
2026-06-29 VLJ628D - Jun 29, 14:14 UTCJun 29, 16:35 UTC2h 20m
2026-06-29 VLJ628D - Jun 29, 05:15 UTCJun 29, 06:59 UTC1h 45m
2026-06-28 VLJ325F NCE → GVA Jun 28, 18:40 UTCJun 28, 19:14 UTC35m
2026-06-28 VLJ325F - Jun 28, 15:29 UTCJun 28, 17:30 UTC2h 0m
2026-06-28 VLJ553E - Jun 28, 10:55 UTCJun 28, 13:49 UTC2h 55m
2026-06-27 VLJ553E - Jun 27, 09:40 UTCJun 27, 10:29 UTC50m
2026-06-27 VLJ553E - Jun 27, 07:15 UTCJun 27, 08:29 UTC1h 15m
2026-06-26 VLJ040U - Jun 26, 18:34 UTCJun 26, 19:35 UTC1h 0m
2026-06-26 VLJ040U - Jun 26, 17:09 UTCJun 26, 18:20 UTC1h 10m
2026-06-25 VLJ646L - Jun 25, 07:05 UTCJun 25, 14:55 UTC7h 50m
2026-06-23 VLJ904G - Jun 23, 18:39 UTCJun 23, 19:34 UTC55m
2026-06-15 VLJ490R - Jun 15, 14:10 UTCJun 15, 15:50 UTC1h 40m
2026-06-15 VLJ490R - Jun 15, 09:40 UTCJun 15, 12:00 UTC2h 20m
2026-06-14 VLJ490R - Jun 14, 12:30 UTCJun 14, 15:50 UTC3h 20m
2026-06-13 VLJ646L - Jun 13, 12:35 UTCJun 14, 12:30 UTC23h 55m
2026-06-13 VLJ646L - Jun 13, 11:20 UTCJun 13, 14:00 UTC2h 40m
2026-06-12 VLJ282J - Jun 12, 16:25 UTCJun 12, 18:25 UTC2h 0m
2026-06-12 VLJ282J - Jun 12, 13:25 UTCJun 12, 15:20 UTC1h 55m
2026-06-12 VLJ282J - Jun 12, 11:05 UTCJun 12, 11:55 UTC50m
2026-06-11 VLJ805Y - Jun 11, 09:50 UTCJun 11, 11:30 UTC1h 40m
2026-06-11 VLJ805Y - Jun 11, 07:35 UTCJun 11, 08:20 UTC45m
2026-06-10 VLJ813E LIN → NCE Jun 10, 19:25 UTCJun 10, 20:05 UTC40m
2026-06-10 VLJ813E GVA → LIN Jun 10, 17:50 UTCJun 10, 18:25 UTC35m
2026-06-10 VLJ813E - Jun 10, 12:50 UTCJun 10, 13:30 UTC40m

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

Mode-S 399452 frequently asked

What is Mode-S code 399452?
399452 is an ICAO 24-bit transponder address. Allocated to France. Assigned to F-HFCS.
Where is Mode-S 399452 registered?
Mode-S code 399452 is allocated to France (FR). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 399452 broadcasting right now?
No active broadcast right now. Last signal was 4d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 399452, octal 16312122, decimal 3,773,522.
What flights does 399452 operate?
Mode-S 399452 has broadcast 20 distinct callsigns, including VLJ014F, VLJ813E, VLJ178F, FHFCS, VLJ601E.