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sensors Mode-S transponder

404605

ICAO 24-bit transponder address · allocated to United Kingdom

Currently assigned to G-CBFA · DIAMOND DA-40 Club Star

Hex
404605
Octal
20043005
Decimal
4,212,229
Country
GB
Tail
G-CBFA
Type
DA40
No current signal · last broadcast Jul 26, 19:45 UTC
Flights observed
80
Distinct callsigns
1
Country
GB
Last broadcast
Jul 26, 19:45 UTC

Last known position

Most recent position reported by Mode-S 404605.

Country allocation

The ICAO 24-bit address 404605 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
GCBFA - 80 2026-07-26

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 GCBFA - Jul 26, 18:05 UTCJul 26, 19:45 UTC1h 40m
2026-07-26 GCBFA - Jul 26, 14:10 UTCJul 26, 16:10 UTC2h 0m
2026-07-26 GCBFA - Jul 26, 11:25 UTCJul 26, 12:30 UTC1h 5m
2026-07-26 GCBFA - Jul 26, 09:35 UTCJul 26, 10:25 UTC50m
2026-07-26 GCBFA - Jul 26, 07:15 UTCJul 26, 08:35 UTC1h 20m
2026-07-25 GCBFA - Jul 25, 19:45 UTCJul 25, 20:25 UTC40m
2026-07-25 GCBFA - Jul 25, 17:00 UTCJul 25, 18:45 UTC1h 45m
2026-07-25 GCBFA - Jul 25, 09:50 UTCJul 25, 11:20 UTC1h 30m
2026-07-24 GCBFA - Jul 24, 14:35 UTCJul 24, 15:50 UTC1h 15m
2026-07-24 GCBFA - Jul 24, 12:35 UTCJul 24, 13:25 UTC50m
2026-07-24 GCBFA - Jul 24, 11:10 UTCJul 24, 11:45 UTC35m
2026-07-23 GCBFA - Jul 23, 15:40 UTCJul 23, 16:25 UTC45m
2026-07-23 GCBFA - Jul 23, 12:45 UTCJul 23, 14:40 UTC1h 55m
2026-07-22 GCBFA NQY → BEX Jul 22, 17:05 UTCJul 22, 18:55 UTC1h 50m
2026-07-21 GCBFA - Jul 21, 16:15 UTCJul 21, 17:55 UTC1h 40m
2026-07-21 GCBFA - Jul 21, 08:15 UTCJul 21, 09:40 UTC1h 25m
2026-07-20 GCBFA - Jul 20, 16:15 UTCJul 20, 16:55 UTC40m
2026-07-20 GCBFA - Jul 20, 15:00 UTCJul 20, 15:30 UTC30m
2026-07-19 GCBFA - Jul 19, 11:35 UTCJul 19, 12:00 UTC25m
2026-07-19 GCBFA BEX → GBA Jul 19, 10:00 UTCJul 19, 10:35 UTC35m
2026-07-18 GCBFA - Jul 18, 13:20 UTCJul 18, 14:15 UTC55m
2026-07-18 GCBFA - Jul 18, 10:25 UTCJul 18, 11:20 UTC55m
2026-07-17 GCBFA - Jul 17, 15:20 UTCJul 17, 16:00 UTC40m
2026-07-17 GCBFA BEX → BEX Jul 17, 13:50 UTCJul 17, 14:10 UTC20m
2026-07-11 GCBFA - Jul 11, 17:55 UTCJul 11, 19:40 UTC1h 45m
2026-07-11 GCBFA BEX → EXT Jul 11, 09:15 UTCJul 11, 11:00 UTC1h 45m
2026-07-10 GCBFA BEX → BEX Jul 10, 17:05 UTCJul 10, 17:45 UTC40m
2026-07-10 GCBFA - Jul 10, 15:50 UTCJul 10, 16:25 UTC35m
2026-07-10 GCBFA - Jul 10, 14:55 UTCJul 10, 15:10 UTC15m
2026-07-10 GCBFA - Jul 10, 14:00 UTCJul 10, 14:20 UTC20m
2026-06-28 GCBFA - Jun 28, 14:25 UTCJun 28, 14:39 UTC15m
2026-06-28 GCBFA - Jun 28, 09:45 UTCJun 28, 13:25 UTC3h 40m
2026-06-26 GCBFA - Jun 26, 12:19 UTCJun 26, 14:25 UTC2h 5m
2026-06-19 GCBFA - Jun 19, 14:04 UTCJun 19, 14:29 UTC25m
2026-06-19 GCBFA - Jun 19, 09:44 UTCJun 19, 10:09 UTC25m
2026-06-19 GCBFA - Jun 19, 07:04 UTCJun 19, 08:44 UTC1h 40m
2026-06-18 GCBFA - Jun 18, 07:10 UTCJun 18, 09:55 UTC2h 45m
2026-06-17 GCBFA BEX → BBS Jun 17, 15:00 UTCJun 17, 15:20 UTC20m
2026-06-14 GCBFA - Jun 14, 13:50 UTCJun 14, 14:05 UTC15m
2026-06-14 GCBFA - Jun 14, 11:45 UTCJun 14, 12:10 UTC25m
2026-06-14 GCBFA - Jun 14, 10:25 UTCJun 14, 10:40 UTC15m
2026-06-13 GCBFA - Jun 13, 13:20 UTCJun 13, 14:25 UTC1h 5m
2026-06-12 GCBFA - Jun 12, 14:35 UTCJun 12, 15:25 UTC50m
2026-06-07 GCBFA BEX → BEX Jun 7, 12:50 UTCJun 7, 13:25 UTC35m
2026-06-05 GCBFA - Jun 5, 14:10 UTCJun 5, 15:00 UTC50m
2026-05-24 GCBFA - May 24, 14:30 UTCMay 24, 15:00 UTC30m
2026-05-24 GCBFA - May 24, 12:55 UTCMay 24, 13:30 UTC35m
2026-05-24 GCBFA - May 24, 10:30 UTCMay 24, 11:50 UTC1h 20m
2026-05-22 GCBFA - May 22, 13:20 UTCMay 22, 15:25 UTC2h 5m
2026-05-22 GCBFA - May 22, 11:55 UTCMay 22, 12:30 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-CBFA page for operator, model, and routing details .

Mode-S 404605 frequently asked

What is Mode-S code 404605?
404605 is an ICAO 24-bit transponder address. Allocated to United Kingdom. Assigned to G-CBFA.
Where is Mode-S 404605 registered?
Mode-S code 404605 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 404605 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 19:45 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 404605, octal 20043005, decimal 4,212,229.
What flights does 404605 operate?
Mode-S 404605 has broadcast 1 distinct callsign, including GCBFA.