Apparatus

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sensors Mode-S transponder

407941

ICAO 24-bit transponder address · allocated to United Kingdom

Currently assigned to G-AWGB · SUPERMARINE Spitfire

Hex
407941
Octal
20074501
Decimal
4,225,345
Country
GB
Tail
G-AWGB
Type
SPIT
No current signal · last broadcast 8h ago
Flights observed
227
Distinct callsigns
1
Country
GB
Last broadcast
8h ago

Last known position

Most recent position reported by Mode-S 407941.

Country allocation

The ICAO 24-bit address 407941 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
GAWGB - 227 2026-07-17

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-17 GAWGB - Jul 17, 16:59 UTCJul 17, 17:50 UTC50m
2026-07-17 GAWGB - Jul 17, 15:00 UTCJul 17, 16:04 UTC1h 5m
2026-07-17 GAWGB - Jul 17, 14:00 UTCJul 17, 14:15 UTC15m
2026-07-15 GAWGB - Jul 15, 15:55 UTCJul 15, 16:35 UTC40m
2026-07-15 GAWGB - Jul 15, 13:50 UTCJul 15, 14:25 UTC35m
2026-07-14 GAWGB - Jul 14, 15:40 UTCJul 14, 16:10 UTC30m
2026-07-14 GAWGB - Jul 14, 13:25 UTCJul 14, 14:05 UTC40m
2026-07-14 GAWGB - Jul 14, 11:05 UTCJul 14, 11:50 UTC45m
2026-07-12 GAWGB - Jul 12, 15:35 UTCJul 12, 16:10 UTC35m
2026-07-12 GAWGB - Jul 12, 14:25 UTCJul 12, 14:50 UTC25m
2026-07-12 GAWGB - Jul 12, 13:25 UTCJul 12, 13:45 UTC20m
2026-07-12 GAWGB - Jul 12, 11:30 UTCJul 12, 12:50 UTC1h 20m
2026-07-12 GAWGB - Jul 12, 10:30 UTCJul 12, 10:55 UTC25m
2026-07-12 GAWGB - Jul 12, 08:40 UTCJul 12, 09:55 UTC1h 15m
2026-07-11 GAWGB - Jul 11, 16:20 UTCJul 11, 16:35 UTC15m
2026-07-11 GAWGB - Jul 11, 15:15 UTCJul 11, 15:40 UTC25m
2026-07-11 GAWGB - Jul 11, 14:15 UTCJul 11, 14:30 UTC15m
2026-07-11 GAWGB - Jul 11, 13:05 UTCJul 11, 13:30 UTC25m
2026-07-11 GAWGB - Jul 11, 12:05 UTCJul 11, 12:20 UTC15m
2026-07-11 GAWGB - Jul 11, 10:40 UTCJul 11, 11:00 UTC20m
2026-07-11 GAWGB - Jul 11, 09:30 UTCJul 11, 10:00 UTC30m
2026-07-11 GAWGB - Jul 11, 08:01 UTCJul 11, 08:25 UTC25m
2026-07-10 GAWGB - Jul 10, 16:50 UTCJul 10, 17:05 UTC15m
2026-07-05 GAWGB - Jul 5, 14:55 UTCJul 5, 15:20 UTC25m
2026-07-05 GAWGB - Jul 5, 13:25 UTCJul 5, 14:10 UTC45m
2026-07-05 GAWGB - Jul 5, 12:30 UTCJul 5, 12:50 UTC20m
2026-07-05 GAWGB - Jul 5, 10:25 UTCJul 5, 11:50 UTC1h 25m
2026-07-05 GAWGB - Jul 5, 08:50 UTCJul 5, 09:30 UTC40m
2026-07-04 GAWGB - Jul 4, 17:55 UTCJul 4, 18:30 UTC35m
2026-07-04 GAWGB - Jul 4, 15:55 UTCJul 4, 17:00 UTC1h 5m
2026-07-04 GAWGB - Jul 4, 14:20 UTCJul 4, 15:20 UTC1h 0m
2026-07-04 GAWGB - Jul 4, 13:10 UTCJul 4, 13:35 UTC25m
2026-07-04 GAWGB - Jul 4, 11:35 UTCJul 4, 12:20 UTC45m
2026-07-04 GAWGB - Jul 4, 10:10 UTCJul 4, 10:40 UTC30m
2026-07-03 GAWGB - Jul 3, 16:00 UTCJul 3, 16:10 UTC10m
2026-07-03 GAWGB - Jul 3, 13:35 UTCJul 3, 14:20 UTC45m
2026-07-03 GAWGB - Jul 3, 10:40 UTCJul 3, 11:05 UTC25m
2026-07-01 GAWGB - Jul 1, 13:00 UTCJul 1, 13:45 UTC45m
2026-07-01 GAWGB - Jul 1, 12:05 UTCJul 1, 12:25 UTC20m
2026-07-01 GAWGB - Jul 1, 09:30 UTCJul 1, 09:50 UTC20m
2026-06-30 GAWGB - Jun 30, 15:25 UTCJun 30, 16:50 UTC1h 25m
2026-06-30 GAWGB - Jun 30, 13:05 UTCJun 30, 13:25 UTC20m
2026-06-30 GAWGB - Jun 30, 08:40 UTCJun 30, 09:00 UTC20m
2026-06-29 GAWGB - Jun 29, 15:30 UTCJun 29, 15:49 UTC20m
2026-06-29 GAWGB - Jun 29, 14:14 UTCJun 29, 14:34 UTC20m
2026-06-29 GAWGB - Jun 29, 12:45 UTCJun 29, 13:00 UTC15m
2026-06-29 GAWGB - Jun 29, 11:39 UTCJun 29, 12:00 UTC20m
2026-06-29 GAWGB - Jun 29, 10:34 UTCJun 29, 10:59 UTC25m
2026-06-29 GAWGB - Jun 29, 09:29 UTCJun 29, 09:44 UTC15m
2026-06-29 GAWGB - Jun 29, 08:24 UTCJun 29, 08:44 UTC20m

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

Mode-S 407941 frequently asked

What is Mode-S code 407941?
407941 is an ICAO 24-bit transponder address. Allocated to United Kingdom. Assigned to G-AWGB.
Where is Mode-S 407941 registered?
Mode-S code 407941 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 407941 broadcasting right now?
No active broadcast right now. Last signal was 8h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 407941, octal 20074501, decimal 4,225,345.
What flights does 407941 operate?
Mode-S 407941 has broadcast 1 distinct callsign, including GAWGB.