Apparatus

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sensors Mode-S transponder

401F8F

ICAO 24-bit transponder address · allocated to United Kingdom

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

Hex
401F8F
Octal
20017617
Decimal
4,202,383
Country
GB
Tail
G-BJBW
Type
P28A
Broadcasting now · callsign GBJBW · 2,300 ft
Flights observed
70
Distinct callsigns
1
Country
GB
Last broadcast
20h ago

Current position

401F8F is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address 401F8F 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
GBJBW - 70 2026-07-17

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-17 GBJBW - Jul 17, 12:35 UTCJul 17, 13:25 UTC50m
2026-07-16 GBJBW - Jul 16, 14:25 UTCJul 16, 15:19 UTC55m
2026-07-16 GBJBW - Jul 16, 10:04 UTCJul 16, 10:59 UTC55m
2026-07-12 GBJBW - Jul 12, 14:50 UTCJul 12, 16:25 UTC1h 35m
2026-07-10 GBJBW - Jul 10, 13:55 UTCJul 10, 15:15 UTC1h 20m
2026-07-10 GBJBW - Jul 10, 09:00 UTCJul 10, 09:50 UTC50m
2026-07-09 GBJBW - Jul 9, 13:20 UTCJul 9, 14:10 UTC50m
2026-07-09 GBJBW - Jul 9, 10:05 UTCJul 9, 10:55 UTC50m
2026-07-07 GBJBW - Jul 7, 10:25 UTCJul 7, 12:00 UTC1h 35m
2026-07-05 GBJBW - Jul 5, 15:00 UTCJul 5, 15:40 UTC40m
2026-07-05 GBJBW - Jul 5, 10:20 UTCJul 5, 11:20 UTC1h 0m
2026-07-02 GBJBW - Jul 2, 15:40 UTCJul 2, 16:05 UTC25m
2026-07-02 GBJBW - Jul 2, 10:25 UTCJul 2, 10:50 UTC25m
2026-06-21 GBJBW - Jun 21, 13:15 UTCJun 21, 13:54 UTC40m
2026-06-21 GBJBW - Jun 21, 11:30 UTCJun 21, 11:49 UTC20m
2026-06-19 GBJBW - Jun 19, 15:04 UTCJun 19, 16:29 UTC1h 25m
2026-06-19 GBJBW - Jun 19, 10:14 UTCJun 19, 11:20 UTC1h 5m
2026-06-18 GBJBW - Jun 18, 11:35 UTCJun 18, 12:20 UTC45m
2026-06-16 GBJBW - Jun 16, 13:00 UTCJun 16, 13:30 UTC30m
2026-06-16 GBJBW - Jun 16, 10:09 UTCJun 16, 10:30 UTC20m
2026-06-15 GBJBW - Jun 15, 10:09 UTCJun 15, 10:35 UTC25m
2026-06-15 GBJBW - Jun 15, 07:50 UTCJun 15, 08:20 UTC30m
2026-06-14 GBJBW - Jun 14, 13:00 UTCJun 14, 13:55 UTC55m
2026-06-13 GBJBW - Jun 13, 13:15 UTCJun 13, 14:25 UTC1h 10m
2026-06-13 GBJBW - Jun 13, 09:45 UTCJun 13, 10:50 UTC1h 5m
2026-05-31 GBJBW - May 31, 12:55 UTCMay 31, 14:20 UTC1h 25m
2026-05-30 GBJBW - May 30, 17:05 UTCMay 30, 18:15 UTC1h 10m
2026-05-30 GBJBW - May 30, 08:20 UTCMay 30, 09:45 UTC1h 25m
2026-05-29 GBJBW - May 29, 15:00 UTCMay 29, 15:30 UTC30m
2026-05-29 GBJBW - May 29, 12:15 UTCMay 29, 12:40 UTC25m
2026-05-28 GBJBW - May 28, 14:50 UTCMay 28, 16:15 UTC1h 25m
2026-05-28 GBJBW - May 28, 08:00 UTCMay 28, 09:25 UTC1h 25m
2026-05-26 GBJBW - May 26, 16:10 UTCMay 26, 17:15 UTC1h 5m
2026-05-26 GBJBW - May 26, 14:00 UTCMay 26, 14:40 UTC40m
2026-05-26 GBJBW - May 26, 11:24 UTCMay 26, 12:14 UTC50m
2026-05-25 GBJBW - May 25, 11:30 UTCMay 25, 12:40 UTC1h 10m
2026-05-25 GBJBW - May 25, 08:50 UTCMay 25, 09:40 UTC50m
2026-05-23 GBJBW - May 23, 15:55 UTCMay 23, 17:30 UTC1h 35m
2026-05-23 GBJBW - May 23, 08:00 UTCMay 23, 09:45 UTC1h 45m
2026-05-22 GBJBW - May 22, 13:45 UTCMay 22, 14:40 UTC55m
2026-05-21 GBJBW - May 21, 11:20 UTCMay 21, 11:55 UTC35m
2026-05-21 GBJBW - May 21, 09:05 UTCMay 21, 09:35 UTC30m
2026-05-17 GBJBW - May 17, 11:50 UTCMay 17, 12:30 UTC40m
2026-05-17 GBJBW - May 17, 09:25 UTCMay 17, 10:05 UTC40m
2026-05-15 GBJBW - May 15, 10:10 UTCMay 15, 11:00 UTC50m
2026-05-14 GBJBW - May 14, 13:40 UTCMay 14, 14:05 UTC25m
2026-05-14 GBJBW - May 14, 10:10 UTCMay 14, 10:55 UTC45m
2026-05-12 GBJBW - May 12, 12:50 UTCMay 12, 13:45 UTC55m
2026-05-12 GBJBW - May 12, 10:25 UTCMay 12, 11:45 UTC1h 20m
2026-05-07 GBJBW - May 7, 13:30 UTCMay 7, 14:10 UTC40m

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

Mode-S 401F8F frequently asked

What is Mode-S code 401F8F?
401F8F is an ICAO 24-bit transponder address. Allocated to United Kingdom. Assigned to G-BJBW.
Where is Mode-S 401F8F registered?
Mode-S code 401F8F 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 401F8F broadcasting right now?
Yes. Mode-S 401F8F is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 401F8F, octal 20017617, decimal 4,202,383.
What flights does 401F8F operate?
Mode-S 401F8F has broadcast 1 distinct callsign, including GBJBW.