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sensors Mode-S transponder

40413C

ICAO 24-bit transponder address · allocated to United Kingdom

Currently assigned to G-BYHJ · PIPER PA-28R-180/200/201

Hex
40413C
Octal
20040474
Decimal
4,211,004
Country
GB
Tail
G-BYHJ
Type
P28R
No current signal · last broadcast 16h ago
Flights observed
159
Distinct callsigns
2
Country
GB
Last broadcast
16h ago

Last known position

Most recent position reported by Mode-S 40413C.

Country allocation

The ICAO 24-bit address 40413C 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
GBYHJ - 135 2026-07-13
GBPAY - 24 2026-05-08

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-13 GBYHJ - Jul 13, 17:45 UTCJul 13, 18:35 UTC50m
2026-07-13 GBYHJ - Jul 13, 16:10 UTCJul 13, 16:55 UTC45m
2026-07-13 GBYHJ - Jul 13, 13:35 UTCJul 13, 14:15 UTC40m
2026-07-12 GBYHJ - Jul 12, 10:10 UTCJul 12, 11:15 UTC1h 5m
2026-07-11 GBYHJ - Jul 11, 11:50 UTCJul 11, 12:50 UTC1h 0m
2026-07-09 GBYHJ - Jul 9, 11:55 UTCJul 9, 12:40 UTC45m
2026-07-09 GBYHJ - Jul 9, 10:10 UTCJul 9, 10:50 UTC40m
2026-07-07 GBYHJ - Jul 7, 09:35 UTCJul 7, 09:55 UTC20m
2026-07-06 GBYHJ - Jul 6, 12:15 UTCJul 6, 14:00 UTC1h 45m
2026-07-05 GBYHJ - Jul 5, 10:40 UTCJul 5, 12:00 UTC1h 20m
2026-07-04 GBYHJ - Jul 4, 15:35 UTCJul 4, 16:50 UTC1h 15m
2026-07-04 GBYHJ - Jul 4, 12:30 UTCJul 4, 13:15 UTC45m
2026-07-04 GBYHJ - Jul 4, 08:25 UTCJul 4, 09:15 UTC50m
2026-07-03 GBYHJ - Jul 3, 14:35 UTCJul 3, 15:10 UTC35m
2026-07-02 GBYHJ - Jul 2, 17:20 UTCJul 2, 17:45 UTC25m
2026-07-02 GBYHJ - Jul 2, 11:55 UTCJul 2, 12:45 UTC50m
2026-07-02 GBYHJ - Jul 2, 10:00 UTCJul 2, 11:00 UTC1h 0m
2026-07-01 GBYHJ - Jul 1, 14:50 UTCJul 1, 15:10 UTC20m
2026-07-01 GBYHJ - Jul 1, 11:50 UTCJul 1, 12:55 UTC1h 5m
2026-06-30 GBYHJ - Jun 30, 11:50 UTCJun 30, 12:45 UTC55m
2026-06-30 GBYHJ - Jun 30, 09:40 UTCJun 30, 10:15 UTC35m
2026-06-29 GBYHJ - Jun 29, 09:10 UTCJun 29, 09:44 UTC35m
2026-06-28 GBYHJ - Jun 28, 15:49 UTCJun 28, 16:35 UTC45m
2026-06-28 GBYHJ - Jun 28, 08:09 UTCJun 28, 08:55 UTC45m
2026-06-27 GBYHJ - Jun 27, 10:05 UTCJun 27, 10:34 UTC30m
2026-06-27 GBYHJ - Jun 27, 08:49 UTCJun 27, 09:19 UTC30m
2026-06-26 GBYHJ - Jun 26, 12:59 UTCJun 26, 14:44 UTC1h 45m
2026-06-26 GBYHJ - Jun 26, 10:39 UTCJun 26, 11:40 UTC1h 0m
2026-06-26 GBYHJ - Jun 26, 08:00 UTCJun 26, 09:00 UTC1h 0m
2026-06-24 GBYHJ - Jun 24, 07:34 UTCJun 24, 09:19 UTC1h 45m
2026-06-23 GBYHJ - Jun 23, 13:59 UTCJun 23, 15:44 UTC1h 45m
2026-06-23 GBYHJ - Jun 23, 10:44 UTCJun 23, 12:49 UTC2h 5m
2026-06-23 GBYHJ - Jun 23, 07:55 UTCJun 23, 09:45 UTC1h 50m
2026-06-22 GBYHJ - Jun 22, 16:24 UTCJun 22, 17:15 UTC50m
2026-06-22 GBYHJ - Jun 22, 13:14 UTCJun 22, 14:55 UTC1h 40m
2026-06-22 GBYHJ - Jun 22, 10:19 UTCJun 22, 12:44 UTC2h 25m
2026-06-22 GBYHJ - Jun 22, 07:54 UTCJun 22, 09:40 UTC1h 45m
2026-06-21 GBYHJ - Jun 21, 11:59 UTCJun 21, 14:44 UTC2h 45m
2026-06-21 GBYHJ - Jun 21, 07:49 UTCJun 21, 10:40 UTC2h 50m
2026-06-19 GBYHJ - Jun 19, 14:09 UTCJun 19, 15:54 UTC1h 45m
2026-06-19 GBYHJ - Jun 19, 12:25 UTCJun 19, 13:34 UTC1h 10m
2026-06-19 GBYHJ - Jun 19, 09:59 UTCJun 19, 10:59 UTC1h 0m
2026-06-19 GBYHJ - Jun 19, 07:54 UTCJun 19, 09:04 UTC1h 10m
2026-06-18 GBYHJ - Jun 18, 09:40 UTCJun 18, 12:45 UTC3h 5m
2026-06-18 GBYHJ - Jun 18, 07:30 UTCJun 18, 08:00 UTC30m
2026-06-16 GBYHJ - Jun 16, 10:45 UTCJun 16, 13:44 UTC3h 0m
2026-06-16 GBYHJ - Jun 16, 08:44 UTCJun 16, 09:00 UTC15m
2026-06-10 GBYHJ - Jun 10, 07:40 UTCJun 10, 08:45 UTC1h 5m
2026-06-09 GBYHJ - Jun 9, 13:05 UTCJun 9, 14:45 UTC1h 40m
2026-06-09 GBYHJ - Jun 9, 10:50 UTCJun 9, 12:15 UTC1h 25m

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

Mode-S 40413C frequently asked

What is Mode-S code 40413C?
40413C is an ICAO 24-bit transponder address. Allocated to United Kingdom. Assigned to G-BYHJ.
Where is Mode-S 40413C registered?
Mode-S code 40413C 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 40413C 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 40413C, octal 20040474, decimal 4,211,004.
What flights does 40413C operate?
Mode-S 40413C has broadcast 2 distinct callsigns, including GBYHJ, GBPAY.