Apparatus

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sensors Mode-S transponder

402BB6

ICAO 24-bit transponder address · allocated to United Kingdom

Currently assigned to G-BOOF · PIPER PA-28-140/150/160/180

Hex
402BB6
Octal
20025666
Decimal
4,205,494
Country
GB
Tail
G-BOOF
Type
P28A
No current signal · last broadcast 16h ago
Flights observed
103
Distinct callsigns
1
Country
GB
Last broadcast
16h ago

Last known position

Most recent position reported by Mode-S 402BB6.

Country allocation

The ICAO 24-bit address 402BB6 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
GBOOF - 103 2026-05-29

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-05-29 GBOOF - May 29, 17:20 UTCMay 29, 17:55 UTC35m
2026-05-27 GBOOF - May 27, 14:30 UTCMay 27, 15:10 UTC40m
2026-05-27 GBOOF NQY → NQY May 27, 11:05 UTCMay 27, 11:50 UTC45m
2026-05-27 GBOOF NQY → NQY May 27, 09:45 UTCMay 27, 10:05 UTC20m
2026-05-26 GBOOF NQY → NQY May 26, 16:50 UTCMay 26, 17:05 UTC15m
2026-05-26 GBOOF NQY → NQY May 26, 15:29 UTCMay 26, 16:15 UTC45m
2026-05-26 GBOOF NQY → NQY May 26, 12:45 UTCMay 26, 13:04 UTC20m
2026-05-26 GBOOF - May 26, 11:05 UTCMay 26, 11:44 UTC40m
2026-05-26 GBOOF NQY → NQY May 26, 08:45 UTCMay 26, 09:29 UTC45m
2026-05-25 GBOOF - May 25, 16:45 UTCMay 25, 17:00 UTC15m
2026-05-25 GBOOF - May 25, 15:40 UTCMay 25, 15:55 UTC15m
2026-05-25 GBOOF - May 25, 14:15 UTCMay 25, 14:55 UTC40m
2026-05-25 GBOOF - May 25, 11:50 UTCMay 25, 12:45 UTC55m
2026-05-25 GBOOF - May 25, 09:35 UTCMay 25, 10:15 UTC40m
2026-05-24 GBOOF NQY → NQY May 24, 16:40 UTCMay 24, 17:15 UTC35m
2026-05-24 GBOOF - May 24, 14:05 UTCMay 24, 15:35 UTC1h 30m
2026-05-24 GBOOF - May 24, 12:15 UTCMay 24, 12:50 UTC35m
2026-05-24 GBOOF NQY → NQY May 24, 10:10 UTCMay 24, 11:00 UTC50m
2026-05-24 GBOOF NQY → NQY May 24, 09:00 UTCMay 24, 09:35 UTC35m
2026-05-23 GBOOF - May 23, 16:05 UTCMay 23, 16:40 UTC35m
2026-05-23 GBOOF - May 23, 14:35 UTCMay 23, 15:10 UTC35m
2026-05-23 GBOOF NQY → NQY May 23, 11:50 UTCMay 23, 13:15 UTC1h 25m
2026-05-21 GBOOF NQY → NQY May 21, 14:20 UTCMay 21, 14:40 UTC20m
2026-05-17 GBOOF NQY → NQY May 17, 13:15 UTCMay 17, 14:01 UTC45m
2026-05-15 GBOOF - May 15, 14:55 UTCMay 15, 15:30 UTC35m
2026-05-12 GBOOF NQY → NQY May 12, 11:50 UTCMay 12, 12:15 UTC25m
2026-05-12 GBOOF NQY → NQY May 12, 09:20 UTCMay 12, 10:30 UTC1h 10m
2026-05-11 GBOOF - May 11, 15:45 UTCMay 11, 16:10 UTC25m
2026-05-11 GBOOF NQY → NQY May 11, 14:20 UTCMay 11, 15:10 UTC50m
2026-05-11 GBOOF - May 11, 12:20 UTCMay 11, 13:10 UTC50m
2026-05-11 GBOOF - May 11, 11:00 UTCMay 11, 11:40 UTC40m
2026-05-11 GBOOF - May 11, 08:40 UTCMay 11, 09:35 UTC55m
2026-05-09 GBOOF NQY → NQY May 9, 15:10 UTCMay 9, 16:15 UTC1h 5m
2026-05-09 GBOOF - May 9, 13:20 UTCMay 9, 13:55 UTC35m
2026-05-09 GBOOF - May 9, 12:10 UTCMay 9, 12:40 UTC30m
2026-05-09 GBOOF - May 9, 11:00 UTCMay 9, 11:20 UTC20m
2026-05-09 GBOOF NQY → NQY May 9, 09:05 UTCMay 9, 09:30 UTC25m
2026-05-08 GBOOF - May 8, 15:10 UTCMay 8, 15:55 UTC45m
2026-05-08 GBOOF NQY → NQY May 8, 12:39 UTCMay 8, 12:55 UTC15m
2026-05-08 GBOOF - May 8, 10:59 UTCMay 8, 11:44 UTC45m
2026-05-08 GBOOF NQY → NQY May 8, 09:19 UTCMay 8, 09:59 UTC40m
2026-05-07 GBOOF - May 7, 14:40 UTCMay 7, 14:55 UTC15m
2026-05-07 GBOOF - May 7, 13:00 UTCMay 7, 13:45 UTC45m
2026-05-07 GBOOF - May 7, 10:45 UTCMay 7, 11:50 UTC1h 5m
2026-05-07 GBOOF NQY → NQY May 7, 08:50 UTCMay 7, 09:30 UTC40m
2026-05-05 GBOOF NQY → NQY May 5, 16:00 UTCMay 5, 16:45 UTC45m
2026-05-05 GBOOF NQY → NQY May 5, 13:50 UTCMay 5, 14:40 UTC50m
2026-05-05 GBOOF - May 5, 12:35 UTCMay 5, 13:15 UTC40m
2026-05-04 GBOOF NQY → NQY May 4, 10:30 UTCMay 4, 11:20 UTC50m
2026-05-04 GBOOF NQY → NQY May 4, 08:50 UTCMay 4, 09:35 UTC45m

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

Mode-S 402BB6 frequently asked

What is Mode-S code 402BB6?
402BB6 is an ICAO 24-bit transponder address. Allocated to United Kingdom. Assigned to G-BOOF.
Where is Mode-S 402BB6 registered?
Mode-S code 402BB6 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 402BB6 broadcasting right now?
No active broadcast right now. Last signal was 16h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 402BB6, octal 20025666, decimal 4,205,494.
What flights does 402BB6 operate?
Mode-S 402BB6 has broadcast 1 distinct callsign, including GBOOF.