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sensors Mode-S transponder

405612

ICAO 24-bit transponder address · allocated to United Kingdom

Currently assigned to G-CJBM · Schleicher ASK-21

Hex
405612
Octal
20053022
Decimal
4,216,338
Country
GB
Tail
G-CJBM
Type
GLID
No current signal · last broadcast 1d ago
Flights observed
88
Distinct callsigns
1
Country
GB
Last broadcast
1d ago

Last known position

Most recent position reported by Mode-S 405612.

Country allocation

The ICAO 24-bit address 405612 falls within the block assigned to United Kingdom (GB) by ICAO Annex 10, Volume III. Every aircraft registered in United Kingdom 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 1 distinct

Callsign Airline Flights Last seen
GCJBM - 88 2026-07-23

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-23 GCJBM - Jul 23, 16:25 UTCJul 23, 16:40 UTC15m
2026-07-23 GCJBM - Jul 23, 13:35 UTCJul 23, 14:30 UTC55m
2026-07-23 GCJBM - Jul 23, 09:45 UTCJul 23, 09:55 UTC10m
2026-07-18 GCJBM - Jul 18, 13:25 UTCJul 18, 14:35 UTC1h 10m
2026-07-18 GCJBM - Jul 18, 10:30 UTCJul 18, 12:05 UTC1h 35m
2026-07-16 GCJBM - Jul 16, 15:00 UTCJul 16, 16:00 UTC1h 0m
2026-07-16 GCJBM - Jul 16, 14:00 UTCJul 16, 14:20 UTC20m
2026-07-16 GCJBM - Jul 16, 10:10 UTCJul 16, 11:40 UTC1h 30m
2026-07-15 GCJBM - Jul 15, 16:20 UTCJul 15, 17:30 UTC1h 10m
2026-07-15 GCJBM - Jul 15, 14:20 UTCJul 15, 15:15 UTC55m
2026-07-15 GCJBM - Jul 15, 11:55 UTCJul 15, 12:35 UTC40m
2026-07-14 GCJBM - Jul 14, 15:55 UTCJul 14, 16:50 UTC55m
2026-07-14 GCJBM - Jul 14, 13:55 UTCJul 14, 14:25 UTC30m
2026-07-14 GCJBM - Jul 14, 12:25 UTCJul 14, 13:25 UTC1h 0m
2026-07-11 GCJBM - Jul 11, 13:20 UTCJul 11, 14:20 UTC1h 0m
2026-07-11 GCJBM - Jul 11, 12:05 UTCJul 11, 12:40 UTC35m
2026-07-11 GCJBM - Jul 11, 10:40 UTCJul 11, 11:25 UTC45m
2026-07-09 GCJBM - Jul 9, 14:15 UTCJul 9, 15:20 UTC1h 5m
2026-07-09 GCJBM - Jul 9, 12:30 UTCJul 9, 12:40 UTC10m
2026-07-05 GCJBM - Jul 5, 11:45 UTCJul 5, 12:30 UTC45m
2026-07-05 GCJBM - Jul 5, 10:05 UTCJul 5, 11:00 UTC55m
2026-07-04 GCJBM - Jul 4, 09:55 UTCJul 4, 12:15 UTC2h 20m
2026-06-28 GCJBM - Jun 28, 16:19 UTCJun 28, 17:25 UTC1h 5m
2026-06-28 GCJBM - Jun 28, 15:14 UTCJun 28, 15:29 UTC15m
2026-06-28 GCJBM - Jun 28, 14:09 UTCJun 28, 14:25 UTC15m
2026-06-28 GCJBM - Jun 28, 12:55 UTCJun 28, 13:19 UTC25m
2026-06-28 GCJBM - Jun 28, 11:45 UTCJun 28, 12:15 UTC30m
2026-06-21 GCJBM - Jun 21, 15:44 UTCJun 21, 16:25 UTC40m
2026-06-21 GCJBM - Jun 21, 14:34 UTCJun 21, 15:05 UTC30m
2026-06-21 GCJBM - Jun 21, 13:34 UTCJun 21, 13:54 UTC20m
2026-06-21 GCJBM - Jun 21, 11:24 UTCJun 21, 11:34 UTC10m
2026-06-21 GCJBM - Jun 21, 10:29 UTCJun 21, 10:44 UTC15m
2026-06-20 GCJBM - Jun 20, 14:54 UTCJun 20, 15:29 UTC35m
2026-06-20 GCJBM - Jun 20, 11:30 UTCJun 20, 13:55 UTC2h 25m
2026-06-18 GCJBM - Jun 18, 15:40 UTCJun 18, 15:55 UTC15m
2026-06-18 GCJBM - Jun 18, 13:45 UTCJun 18, 14:10 UTC25m
2026-06-18 GCJBM - Jun 18, 10:40 UTCJun 18, 12:15 UTC1h 35m
2026-06-16 GCJBM - Jun 16, 16:39 UTCJun 16, 17:15 UTC35m
2026-06-16 GCJBM - Jun 16, 15:00 UTCJun 16, 15:09 UTC10m
2026-06-16 GCJBM - Jun 16, 10:04 UTCJun 16, 11:00 UTC55m
2026-06-14 GCJBM - Jun 14, 14:00 UTCJun 14, 14:55 UTC55m
2026-06-14 GCJBM - Jun 14, 10:20 UTCJun 14, 13:05 UTC2h 45m
2026-06-13 GCJBM - Jun 13, 14:40 UTCJun 13, 15:00 UTC20m
2026-06-13 GCJBM - Jun 13, 13:35 UTCJun 13, 14:05 UTC30m
2026-06-13 GCJBM - Jun 13, 10:50 UTCJun 13, 13:00 UTC2h 10m
2026-06-07 GCJBM - Jun 7, 12:40 UTCJun 7, 12:55 UTC15m
2026-06-07 GCJBM - Jun 7, 11:15 UTCJun 7, 11:55 UTC40m
2026-06-07 GCJBM - Jun 7, 10:20 UTCJun 7, 10:30 UTC10m
2026-05-30 GCJBM - May 30, 15:25 UTCMay 30, 16:05 UTC40m
2026-05-30 GCJBM - May 30, 13:40 UTCMay 30, 14:15 UTC35m

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 G-CJBM page for operator, model, and routing details .

Mode-S 405612 frequently asked

What is Mode-S code 405612?
405612 is an ICAO 24-bit transponder address. Allocated to United Kingdom. Assigned to G-CJBM.
Where is Mode-S 405612 registered?
Mode-S code 405612 is allocated to United Kingdom (GB). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 405612 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 405612, octal 20053022, decimal 4,216,338.
What flights does 405612 operate?
Mode-S 405612 has broadcast 1 distinct callsign, including GCJBM.