Apparatus

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sensors Mode-S transponder

408009

ICAO 24-bit transponder address · allocated to United Kingdom

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

Hex
408009
Octal
20100011
Decimal
4,227,081
Country
GB
Tail
G-DPAE
Type
DA40
No current signal · last broadcast 17h ago
Flights observed
90
Distinct callsigns
2
Country
GB
Last broadcast
17h ago

Last known position

Most recent position reported by Mode-S 408009.

Country allocation

The ICAO 24-bit address 408009 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 2 distinct

Callsign Airline Flights Last seen
GDPAE - 85 2026-07-13
EXM39 - 5 2026-05-29

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-13 GDPAE BLK → BLK Jul 13, 12:30 UTCJul 13, 13:20 UTC50m
2026-07-13 GDPAE BLK → BLK Jul 13, 10:50 UTCJul 13, 11:20 UTC30m
2026-07-13 GDPAE BLK → BLK Jul 13, 09:15 UTCJul 13, 10:15 UTC1h 0m
2026-07-08 GDPAE BLK → BLK Jul 8, 15:25 UTCJul 8, 16:45 UTC1h 20m
2026-07-08 GDPAE - Jul 8, 13:05 UTCJul 8, 14:25 UTC1h 20m
2026-07-06 GDPAE - Jul 6, 14:15 UTCJul 6, 14:50 UTC35m
2026-07-03 GDPAE - Jul 3, 14:30 UTCJul 3, 15:40 UTC1h 10m
2026-07-03 GDPAE - Jul 3, 12:30 UTCJul 3, 13:30 UTC1h 0m
2026-07-01 GDPAE - Jul 1, 14:55 UTCJul 1, 16:00 UTC1h 5m
2026-07-01 GDPAE - Jul 1, 11:40 UTCJul 1, 13:00 UTC1h 20m
2026-07-01 GDPAE - Jul 1, 09:15 UTCJul 1, 10:15 UTC1h 0m
2026-06-29 GDPAE - Jun 29, 13:24 UTCJun 29, 14:29 UTC1h 5m
2026-06-29 GDPAE - Jun 29, 10:50 UTCJun 29, 11:55 UTC1h 5m
2026-06-25 GDPAE BLK → BLK Jun 25, 12:35 UTCJun 25, 13:29 UTC55m
2026-06-24 GDPAE - Jun 24, 11:59 UTCJun 24, 12:54 UTC55m
2026-06-24 GDPAE - Jun 24, 09:39 UTCJun 24, 10:39 UTC1h 0m
2026-06-17 GDPAE - Jun 17, 14:40 UTCJun 17, 15:20 UTC40m
2026-06-17 GDPAE - Jun 17, 12:40 UTCJun 17, 13:30 UTC50m
2026-06-15 GDPAE BLK → BLK Jun 15, 13:15 UTCJun 15, 14:00 UTC45m
2026-06-15 GDPAE BLK → BLK Jun 15, 11:24 UTCJun 15, 12:30 UTC1h 5m
2026-06-15 GDPAE - Jun 15, 10:00 UTCJun 15, 10:15 UTC15m
2026-06-15 GDPAE BLK → BLK Jun 15, 09:30 UTCJun 15, 09:40 UTC10m
2026-06-13 GDPAE BLK → BLK Jun 13, 10:15 UTCJun 13, 11:45 UTC1h 30m
2026-06-10 GDPAE BLK → BLK Jun 10, 14:10 UTCJun 10, 15:00 UTC50m
2026-06-10 GDPAE BLK → BLK Jun 10, 12:20 UTCJun 10, 13:10 UTC50m
2026-06-10 GDPAE BLK → BLK Jun 10, 09:35 UTCJun 10, 10:30 UTC55m
2026-06-02 GDPAE BLK → BLK Jun 2, 11:50 UTCJun 2, 13:30 UTC1h 40m
2026-06-01 GDPAE BLK → BLK Jun 1, 13:40 UTCJun 1, 14:25 UTC45m
2026-05-30 GDPAE - May 30, 15:40 UTCMay 30, 16:50 UTC1h 10m
2026-05-30 GDPAE BLK → BLK May 30, 14:25 UTCMay 30, 15:10 UTC45m
2026-05-30 GDPAE BLK → BLK May 30, 11:35 UTCMay 30, 12:55 UTC1h 20m
2026-05-29 GDPAE BLK → BLK May 29, 14:25 UTCMay 29, 15:15 UTC50m
2026-05-29 EXM39 BLK → BLK May 29, 11:35 UTCMay 29, 12:35 UTC1h 0m
2026-05-27 EXM39 BLK → BLK May 27, 12:40 UTCMay 27, 13:30 UTC50m
2026-05-21 EXM39 BLK → BLK May 21, 12:10 UTCMay 21, 12:45 UTC35m
2026-05-21 EXM39 BLK → BLK May 21, 10:10 UTCMay 21, 10:50 UTC40m
2026-05-16 EXM39 BLK → BLK May 16, 12:31 UTCMay 16, 13:55 UTC1h 25m
2026-05-15 GDPAE BLK → BLK May 15, 17:30 UTCMay 15, 18:05 UTC35m
2026-05-15 GDPAE BLK → BLK May 15, 15:45 UTCMay 15, 16:40 UTC55m
2026-05-15 GDPAE BLK → BLK May 15, 13:10 UTCMay 15, 13:55 UTC45m
2026-05-15 GDPAE BLK → BLK May 15, 10:35 UTCMay 15, 11:35 UTC1h 0m
2026-05-12 GDPAE BLK → BLK May 12, 13:00 UTCMay 12, 14:55 UTC1h 55m
2026-05-11 GDPAE BLK → BLK May 11, 13:15 UTCMay 11, 14:25 UTC1h 10m
2026-05-11 GDPAE BLK → BLK May 11, 10:20 UTCMay 11, 11:05 UTC45m
2026-05-11 GDPAE - May 11, 08:15 UTCMay 11, 09:20 UTC1h 5m
2026-05-09 GDPAE - May 9, 12:20 UTCMay 9, 13:50 UTC1h 30m
2026-05-09 GDPAE BLK → BLK May 9, 11:15 UTCMay 9, 11:55 UTC40m
2026-05-08 GDPAE BLK → BLK May 8, 15:30 UTCMay 8, 17:40 UTC2h 10m
2026-05-08 GDPAE BLK → BLK May 8, 13:50 UTCMay 8, 14:50 UTC1h 0m
2026-05-07 GDPAE BLK → BLK May 7, 16:00 UTCMay 7, 17:15 UTC1h 15m

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

Mode-S 408009 frequently asked

What is Mode-S code 408009?
408009 is an ICAO 24-bit transponder address. Allocated to United Kingdom. Assigned to G-DPAE.
Where is Mode-S 408009 registered?
Mode-S code 408009 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 408009 broadcasting right now?
No active broadcast right now. Last signal was 17h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 408009, octal 20100011, decimal 4,227,081.
What flights does 408009 operate?
Mode-S 408009 has broadcast 2 distinct callsigns, including GDPAE, EXM39.