Apparatus

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sensors Mode-S transponder

39514B

ICAO 24-bit transponder address · allocated to France

Currently assigned to F-GUKL · GROB G-120

Hex
39514B
Octal
16250513
Decimal
3,756,363
Country
FR
Tail
F-GUKL
Type
G120
No current signal · last broadcast 6h ago
Flights observed
62
Distinct callsigns
20
Country
FR
Last broadcast
6h ago

Last known position

Most recent position reported by Mode-S 39514B.

Country allocation

The ICAO 24-bit address 39514B 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
MOLOCH65 - 8 2026-07-16
MOLOCH77 - 7 2026-07-02
MOLOCH66 - 6 2026-06-17
MOLOCH67 - 5 2026-07-21
MOLOCH75 - 3 2026-05-21
MOLOCH68 - 3 2026-06-23
FAF6522 - 3 2026-06-10
FAF6520 - 3 2026-06-16
MOLOCH89 - 2 2026-07-15
MOLOCH85 - 2 2026-07-01
MOLOCH79 - 2 2026-07-10
MOLOCH76 - 2 2026-05-21
MOLOCH73 - 2 2026-05-18
MOLOCH71 - 2 2026-07-17
MOLOCH61 - 2 2026-06-01
MUTANT01 - 1 2026-04-14
MOLOCH87 - 1 2026-06-11
MOLOCH81 - 1 2026-05-26
MOLOCH78 - 1 2026-05-20
MOLOCH72 - 1 2026-06-18

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-22 FAF6521 - Jul 22, 14:50 UTCJul 22, 15:15 UTC25m
2026-07-21 MOLOCH67 - Jul 21, 21:55 UTCJul 21, 22:20 UTC25m
2026-07-20 MOLOCH67 - Jul 20, 12:35 UTCJul 20, 13:40 UTC1h 5m
2026-07-20 METAL85 - Jul 20, 10:55 UTCJul 20, 11:20 UTC25m
2026-07-17 MOLOCH71 - Jul 17, 12:40 UTCJul 17, 13:15 UTC35m
2026-07-16 MOLOCH65 - Jul 16, 20:19 UTCJul 16, 21:35 UTC1h 15m
2026-07-15 MOLOCH89 - Jul 15, 20:20 UTCJul 15, 22:05 UTC1h 45m
2026-07-10 MOLOCH79 - Jul 10, 07:05 UTCJul 10, 08:10 UTC1h 5m
2026-07-07 MOLOCH67 - Jul 7, 21:55 UTCJul 7, 23:25 UTC1h 30m
2026-07-06 MOLOCH89 - Jul 6, 08:00 UTCJul 6, 08:50 UTC50m
2026-07-02 MOLOCH77 - Jul 2, 12:35 UTCJul 2, 13:00 UTC25m
2026-07-01 MOLOCH85 - Jul 1, 13:10 UTCJul 1, 13:35 UTC25m
2026-06-23 MOLOCH68 - Jun 23, 06:34 UTCJun 23, 07:55 UTC1h 20m
2026-06-18 MOLOCH68 - Jun 18, 11:50 UTCJun 18, 13:00 UTC1h 10m
2026-06-18 MOLOCH72 - Jun 18, 06:45 UTCJun 18, 07:05 UTC20m
2026-06-17 MOLOCH66 - Jun 17, 07:35 UTCJun 17, 08:40 UTC1h 5m
2026-06-16 MOLOCH77 - Jun 16, 10:20 UTCJun 16, 10:30 UTC10m
2026-06-16 FAF6520 - Jun 16, 08:05 UTCJun 16, 08:20 UTC15m
2026-06-15 FAF6520 SNR → IDY Jun 15, 15:30 UTCJun 15, 15:55 UTC25m
2026-06-15 FAF6520 - Jun 15, 14:05 UTCJun 15, 14:40 UTC35m
2026-06-12 MOLOCH66 CNG → CNG Jun 12, 12:35 UTCJun 12, 13:55 UTC1h 20m
2026-06-11 MOLOCH87 - Jun 11, 12:50 UTCJun 11, 13:40 UTC50m
2026-06-11 MOLOCH67 - Jun 11, 07:50 UTCJun 11, 08:45 UTC55m
2026-06-10 FAF6522 - Jun 10, 07:25 UTCJun 10, 09:00 UTC1h 35m
2026-06-08 FAF6522 - Jun 8, 15:45 UTCJun 8, 17:15 UTC1h 30m
2026-06-08 FAF6522 - Jun 8, 14:50 UTCJun 8, 15:04 UTC15m
2026-06-04 MOLOCH65 - Jun 4, 20:45 UTCJun 4, 21:55 UTC1h 10m
2026-06-03 MOLOCH67 - Jun 3, 13:00 UTCJun 3, 13:35 UTC35m
2026-06-02 MOLOCH68 - Jun 2, 08:50 UTCJun 2, 09:35 UTC45m
2026-06-01 MOLOCH85 ANG → ANG Jun 1, 12:55 UTCJun 1, 13:10 UTC15m
2026-06-01 MOLOCH61 - Jun 1, 10:20 UTCJun 1, 11:10 UTC50m
2026-05-27 MOLOCH61 - May 27, 13:30 UTCMay 27, 14:10 UTC40m
2026-05-26 MOLOCH81 - May 26, 10:14 UTCMay 26, 10:54 UTC40m
2026-05-22 MOLOCH65 - May 22, 07:25 UTCMay 22, 08:45 UTC1h 20m
2026-05-21 MOLOCH69 - May 21, 20:25 UTCMay 21, 21:35 UTC1h 10m
2026-05-21 MOLOCH76 - May 21, 12:30 UTCMay 21, 13:45 UTC1h 15m
2026-05-21 MOLOCH75 - May 21, 10:10 UTCMay 21, 10:35 UTC25m
2026-05-21 MOLOCH65 - May 21, 07:30 UTCMay 21, 08:40 UTC1h 10m
2026-05-20 MOLOCH66 - May 20, 12:25 UTCMay 20, 13:25 UTC1h 0m
2026-05-20 MOLOCH78 - May 20, 07:55 UTCMay 20, 09:15 UTC1h 20m
2026-05-19 MOLOCH65 - May 19, 21:25 UTCMay 19, 22:40 UTC1h 15m
2026-05-19 MOLOCH77 - May 19, 13:10 UTCMay 19, 13:50 UTC40m
2026-05-19 MOLOCH77 - May 19, 10:25 UTCMay 19, 10:45 UTC20m
2026-05-18 MOLOCH73 - May 18, 10:35 UTCMay 18, 11:15 UTC40m
2026-05-13 MOLOCH71 - May 13, 12:45 UTCMay 13, 13:40 UTC55m
2026-05-13 MOLOCH77 - May 13, 07:45 UTCMay 13, 09:15 UTC1h 30m
2026-05-12 MOLOCH65 - May 12, 12:50 UTCMay 12, 14:00 UTC1h 10m
2026-05-12 MOLOCH66 - May 12, 07:40 UTCMay 12, 08:40 UTC1h 0m
2026-05-11 MOLOCH75 - May 11, 12:30 UTCMay 11, 13:30 UTC1h 0m
2026-05-11 MOLOCH76 - May 11, 07:50 UTCMay 11, 09:15 UTC1h 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-GUKL page for operator, model, and routing details .

Mode-S 39514B frequently asked

What is Mode-S code 39514B?
39514B is an ICAO 24-bit transponder address. Allocated to France. Assigned to F-GUKL.
Where is Mode-S 39514B registered?
Mode-S code 39514B is allocated to France (FR). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 39514B broadcasting right now?
No active broadcast right now. Last signal was 6h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 39514B, octal 16250513, decimal 3,756,363.
What flights does 39514B operate?
Mode-S 39514B has broadcast 20 distinct callsigns, including MOLOCH65, MOLOCH77, MOLOCH66, MOLOCH67, MOLOCH75.