Apparatus

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sensors Mode-S transponder

408330

ICAO 24-bit transponder address · allocated to United Kingdom

Currently assigned to G-ETHO · AGUSTA AW-109 Grand

Hex
408330
Octal
20101460
Decimal
4,227,888
Country
GB
Tail
G-ETHO
Type
A109
No current signal · last broadcast 13h ago
Flights observed
71
Distinct callsigns
2
Country
GB
Last broadcast
13h ago

Last known position

Most recent position reported by Mode-S 408330.

Country allocation

The ICAO 24-bit address 408330 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
GETHO - 69 2026-07-24
BLACK8 - 2 2026-06-16

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-24 GETHO - Jul 24, 08:05 UTCJul 24, 11:00 UTC2h 55m
2026-07-21 GETHO - Jul 21, 18:10 UTCJul 21, 19:10 UTC1h 0m
2026-07-20 GETHO - Jul 20, 17:25 UTCJul 20, 18:30 UTC1h 5m
2026-07-16 GETHO - Jul 16, 14:40 UTCJul 16, 15:05 UTC25m
2026-07-16 GETHO - Jul 16, 13:49 UTCJul 16, 14:15 UTC25m
2026-07-16 GETHO - Jul 16, 10:40 UTCJul 16, 11:05 UTC25m
2026-07-16 GETHO - Jul 16, 10:00 UTCJul 16, 10:20 UTC20m
2026-07-14 GETHO - Jul 14, 15:30 UTCJul 14, 16:00 UTC30m
2026-07-14 GETHO - Jul 14, 14:30 UTCJul 14, 15:05 UTC35m
2026-07-14 GETHO - Jul 14, 08:20 UTCJul 14, 08:55 UTC35m
2026-07-14 GETHO - Jul 14, 07:30 UTCJul 14, 07:50 UTC20m
2026-07-10 GETHO - Jul 10, 06:50 UTCJul 10, 08:15 UTC1h 25m
2026-07-07 GETHO - Jul 7, 16:40 UTCJul 7, 17:10 UTC30m
2026-07-07 GETHO - Jul 7, 15:40 UTCJul 7, 16:10 UTC30m
2026-07-03 GETHO - Jul 3, 15:50 UTCJul 3, 16:45 UTC55m
2026-07-03 GETHO - Jul 3, 10:25 UTCJul 3, 10:55 UTC30m
2026-07-02 GETHO - Jul 2, 10:50 UTCJul 2, 11:50 UTC1h 0m
2026-06-30 GETHO - Jun 30, 17:35 UTCJun 30, 17:40 UTC5m
2026-06-30 GETHO - Jun 30, 16:25 UTCJun 30, 17:30 UTC1h 5m
2026-06-30 GETHO - Jun 30, 14:35 UTCJun 30, 14:55 UTC20m
2026-06-17 GETHO - Jun 17, 09:05 UTCJun 17, 09:25 UTC20m
2026-06-16 BLACK8 - Jun 16, 17:30 UTCJun 16, 17:45 UTC15m
2026-06-16 BLACK8 - Jun 16, 10:35 UTCJun 16, 10:45 UTC10m
2026-06-16 GETHO - Jun 16, 09:15 UTCJun 16, 09:34 UTC20m
2026-06-13 GETHO - Jun 13, 12:10 UTCJun 13, 12:20 UTC10m
2026-06-13 GETHO - Jun 13, 06:50 UTCJun 13, 07:45 UTC55m
2026-06-07 GETHO - Jun 7, 08:55 UTCJun 7, 11:50 UTC2h 55m
2026-06-06 GETHO - Jun 6, 17:19 UTCJun 6, 18:25 UTC1h 5m
2026-06-05 GETHO - Jun 5, 15:55 UTCJun 5, 16:10 UTC15m
2026-06-04 GETHO - Jun 4, 12:25 UTCJun 4, 13:20 UTC55m
2026-06-04 GETHO - Jun 4, 08:20 UTCJun 4, 10:55 UTC2h 35m
2026-06-04 GETHO - Jun 4, 07:30 UTCJun 4, 07:40 UTC10m
2026-06-03 GETHO - Jun 3, 11:35 UTCJun 3, 13:00 UTC1h 25m
2026-06-03 GETHO - Jun 3, 11:00 UTCJun 3, 11:10 UTC10m
2026-06-02 GETHO - Jun 2, 13:20 UTCJun 2, 14:25 UTC1h 5m
2026-06-02 GETHO - Jun 2, 12:15 UTCJun 2, 12:25 UTC10m
2026-06-01 GETHO - Jun 1, 09:15 UTCJun 1, 09:25 UTC10m
2026-06-01 GETHO - Jun 1, 07:35 UTCJun 1, 08:35 UTC1h 0m
2026-05-29 GETHO - May 29, 13:30 UTCMay 29, 13:35 UTC5m
2026-05-29 GETHO - May 29, 11:25 UTCMay 29, 12:35 UTC1h 10m
2026-05-20 GETHO GCI → BQH May 20, 08:00 UTCMay 20, 09:00 UTC1h 0m
2026-05-15 GETHO - May 15, 11:10 UTCMay 15, 11:15 UTC5m
2026-05-15 GETHO - May 15, 10:00 UTCMay 15, 11:00 UTC1h 0m
2026-05-14 GETHO - May 14, 16:35 UTCMay 14, 16:50 UTC15m
2026-05-14 GETHO - May 14, 07:30 UTCMay 14, 07:50 UTC20m
2026-05-13 GETHO - May 13, 14:15 UTCMay 13, 15:15 UTC1h 0m
2026-05-10 GETHO - May 10, 18:39 UTCMay 10, 19:35 UTC55m
2026-05-10 GETHO - May 10, 09:55 UTCMay 10, 11:05 UTC1h 10m
2026-05-07 GETHO - May 7, 11:30 UTCMay 7, 11:35 UTC5m
2026-05-07 GETHO - May 7, 10:10 UTCMay 7, 11:15 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 G-ETHO page for operator, model, and routing details .

Mode-S 408330 frequently asked

What is Mode-S code 408330?
408330 is an ICAO 24-bit transponder address. Allocated to United Kingdom. Assigned to G-ETHO.
Where is Mode-S 408330 registered?
Mode-S code 408330 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 408330 broadcasting right now?
No active broadcast right now. Last signal was 13h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 408330, octal 20101460, decimal 4,227,888.
What flights does 408330 operate?
Mode-S 408330 has broadcast 2 distinct callsigns, including GETHO, BLACK8.