Apparatus

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sensors Mode-S transponder

39514C

ICAO 24-bit transponder address · allocated to France

Currently assigned to F-GUKM · GROB G-120

Hex
39514C
Octal
16250514
Decimal
3,756,364
Country
FR
Tail
F-GUKM
Type
G120
No current signal · last broadcast 1d ago
Flights observed
85
Distinct callsigns
20
Country
FR
Last broadcast
1d ago

Last known position

Most recent position reported by Mode-S 39514C.

Country allocation

The ICAO 24-bit address 39514C 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
MOLOCH78 - 12 2026-06-29
MOLOCH68 - 10 2026-06-12
MOLOCH66 - 10 2026-06-19
MOLOCH85 - 7 2026-06-18
MOLOCH76 - 5 2026-06-23
MOLOCH71 - 5 2026-06-30
MOLOCH75 - 4 2026-06-23
MOLOCH61 - 4 2026-06-29
FAF6521 - 4 2026-05-19
MOLOCH89 - 3 2026-05-21
MOLOCH77 - 3 2026-06-03
MOLOCH67 - 3 2026-06-18
MOLOCH65 - 3 2026-06-17
MOLOCH81 - 2 2026-04-27
MOLOCH69 - 2 2026-07-13
MOLOCH99 - 1 2026-04-16
MOLOCH88 - 1 2026-06-23
MOLOCH87 - 1 2026-04-14
MOLOCH86 - 1 2026-06-26
MOLOCH79 - 1 2026-06-11

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-13 MOLOCH69 - Jul 13, 10:20 UTCJul 13, 10:50 UTC30m
2026-07-09 MOLOCH62 - Jul 9, 09:25 UTCJul 9, 10:30 UTC1h 5m
2026-06-30 MOLOCH71 - Jun 30, 07:30 UTCJun 30, 08:55 UTC1h 25m
2026-06-29 MOLOCH78 - Jun 29, 12:55 UTCJun 29, 13:54 UTC1h 0m
2026-06-29 MOLOCH61 - Jun 29, 07:50 UTCJun 29, 08:24 UTC35m
2026-06-26 MOLOCH86 - Jun 26, 09:39 UTCJun 26, 10:35 UTC55m
2026-06-23 MOLOCH75 CNG → CNG Jun 23, 22:15 UTCJun 23, 23:19 UTC1h 5m
2026-06-23 MOLOCH88 - Jun 23, 09:09 UTCJun 23, 10:29 UTC1h 20m
2026-06-23 MOLOCH76 - Jun 23, 06:29 UTCJun 23, 07:45 UTC1h 15m
2026-06-22 MOLOCH71 - Jun 22, 09:14 UTCJun 22, 10:05 UTC50m
2026-06-22 MOLOCH61 - Jun 22, 06:35 UTCJun 22, 08:10 UTC1h 35m
2026-06-19 MOLOCH66 - Jun 19, 07:25 UTCJun 19, 08:24 UTC1h 0m
2026-06-18 MOLOCH66 - Jun 18, 20:25 UTCJun 18, 21:55 UTC1h 30m
2026-06-18 MOLOCH78 - Jun 18, 11:55 UTCJun 18, 12:30 UTC35m
2026-06-18 MOLOCH85 - Jun 18, 09:25 UTCJun 18, 10:15 UTC50m
2026-06-18 MOLOCH67 - Jun 18, 06:55 UTCJun 18, 08:00 UTC1h 5m
2026-06-17 MOLOCH78 - Jun 17, 12:55 UTCJun 17, 13:50 UTC55m
2026-06-17 MOLOCH78 - Jun 17, 10:25 UTCJun 17, 11:20 UTC55m
2026-06-17 MOLOCH65 - Jun 17, 07:40 UTCJun 17, 08:50 UTC1h 10m
2026-06-16 MOLOCH85 - Jun 16, 10:30 UTCJun 16, 11:05 UTC35m
2026-06-15 MOLOCH72 - Jun 15, 13:20 UTCJun 15, 14:40 UTC1h 20m
2026-06-12 MOLOCH68 - Jun 12, 13:50 UTCJun 12, 14:25 UTC35m
2026-06-12 MOLOCH68 - Jun 12, 12:40 UTCJun 12, 12:50 UTC10m
2026-06-11 MOLOCH79 - Jun 11, 20:30 UTCJun 11, 21:40 UTC1h 10m
2026-06-11 MOLOCH67 - Jun 11, 13:00 UTCJun 11, 13:30 UTC30m
2026-06-10 MOLOCH61 - Jun 10, 10:50 UTCJun 10, 11:50 UTC1h 0m
2026-06-08 MOLOCH78 - Jun 8, 08:00 UTCJun 8, 08:30 UTC30m
2026-06-04 MOLOCH68 - Jun 4, 20:10 UTCJun 4, 21:30 UTC1h 20m
2026-06-04 MOLOCH66 - Jun 4, 13:35 UTCJun 4, 13:45 UTC10m
2026-06-03 MOLOCH77 - Jun 3, 08:05 UTCJun 3, 09:05 UTC1h 0m
2026-06-02 MOLOCH78 - Jun 2, 13:05 UTCJun 2, 13:40 UTC35m
2026-05-27 MOLOCH68 - May 27, 12:40 UTCMay 27, 13:45 UTC1h 5m
2026-05-27 METAL85 - May 27, 10:10 UTCMay 27, 11:15 UTC1h 5m
2026-05-27 MOLOCH68 - May 27, 07:30 UTCMay 27, 08:55 UTC1h 25m
2026-05-26 MOLOCH66 - May 26, 21:34 UTCMay 26, 22:59 UTC1h 25m
2026-05-26 MOLOCH68 - May 26, 12:50 UTCMay 26, 14:05 UTC1h 15m
2026-05-26 MOLOCH65 - May 26, 07:34 UTCMay 26, 08:54 UTC1h 20m
2026-05-22 MOLOCH78 - May 22, 12:50 UTCMay 22, 13:50 UTC1h 0m
2026-05-22 MOLOCH78 - May 22, 10:10 UTCMay 22, 10:40 UTC30m
2026-05-21 MOLOCH78 - May 21, 13:15 UTCMay 21, 13:50 UTC35m
2026-05-21 MOLOCH89 - May 21, 10:25 UTCMay 21, 10:55 UTC30m
2026-05-19 MOLOCH78 - May 19, 12:35 UTCMay 19, 12:50 UTC15m
2026-05-19 FAF6521 - May 19, 10:10 UTCMay 19, 11:20 UTC1h 10m
2026-05-18 FAF6521 - May 18, 14:30 UTCMay 18, 14:45 UTC15m
2026-05-18 FAF6521 - May 18, 13:25 UTCMay 18, 13:55 UTC30m
2026-05-18 MOLOCH85 - May 18, 10:00 UTCMay 18, 11:20 UTC1h 20m
2026-05-18 MOLOCH77 - May 18, 07:40 UTCMay 18, 09:00 UTC1h 20m
2026-05-13 MOLOCH66 - May 13, 12:35 UTCMay 13, 13:31 UTC55m
2026-05-13 MOLOCH66 - May 13, 07:35 UTCMay 13, 09:05 UTC1h 30m
2026-05-12 MOLOCH71 - May 12, 10:20 UTCMay 12, 11:25 UTC1h 5m

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

Mode-S 39514C frequently asked

What is Mode-S code 39514C?
39514C is an ICAO 24-bit transponder address. Allocated to France. Assigned to F-GUKM.
Where is Mode-S 39514C registered?
Mode-S code 39514C is allocated to France (FR). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 39514C broadcasting right now?
No active broadcast right now. Last signal was 1d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 39514C, octal 16250514, decimal 3,756,364.
What flights does 39514C operate?
Mode-S 39514C has broadcast 20 distinct callsigns, including MOLOCH78, MOLOCH68, MOLOCH66, MOLOCH85, MOLOCH76.