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sensors Mode-S transponder

402901

ICAO 24-bit transponder address · allocated to United Kingdom

Currently assigned to G-BNHJ · CESSNA 152

Hex
402901
Octal
20024401
Decimal
4,204,801
Country
GB
Tail
G-BNHJ
Type
C152
No current signal · last broadcast 15h ago
Flights observed
173
Distinct callsigns
1
Country
GB
Last broadcast
15h ago

Last known position

Most recent position reported by Mode-S 402901.

Country allocation

The ICAO 24-bit address 402901 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
GBNHJ - 173 2026-07-13

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-13 GBNHJ - Jul 13, 14:45 UTCJul 13, 15:50 UTC1h 5m
2026-07-13 GBNHJ - Jul 13, 11:40 UTCJul 13, 12:20 UTC40m
2026-07-13 GBNHJ - Jul 13, 08:55 UTCJul 13, 09:50 UTC55m
2026-07-12 GBNHJ - Jul 12, 14:05 UTCJul 12, 14:50 UTC45m
2026-07-12 GBNHJ - Jul 12, 12:50 UTCJul 12, 13:30 UTC40m
2026-07-12 GBNHJ - Jul 12, 10:55 UTCJul 12, 11:40 UTC45m
2026-07-12 GBNHJ - Jul 12, 08:15 UTCJul 12, 09:05 UTC50m
2026-07-11 GBNHJ - Jul 11, 10:50 UTCJul 11, 12:15 UTC1h 25m
2026-07-10 GBNHJ - Jul 10, 11:55 UTCJul 10, 12:55 UTC1h 0m
2026-07-10 GBNHJ - Jul 10, 09:30 UTCJul 10, 10:50 UTC1h 20m
2026-07-07 GBNHJ - Jul 7, 15:30 UTCJul 7, 15:55 UTC25m
2026-07-07 GBNHJ - Jul 7, 14:10 UTCJul 7, 14:50 UTC40m
2026-07-07 GBNHJ - Jul 7, 08:25 UTCJul 7, 09:00 UTC35m
2026-07-06 GBNHJ - Jul 6, 11:40 UTCJul 6, 12:20 UTC40m
2026-07-06 GBNHJ - Jul 6, 08:25 UTCJul 6, 09:15 UTC50m
2026-07-03 GBNHJ - Jul 3, 12:10 UTCJul 3, 13:00 UTC50m
2026-07-03 GBNHJ - Jul 3, 10:10 UTCJul 3, 11:25 UTC1h 15m
2026-07-02 GBNHJ - Jul 2, 15:10 UTCJul 2, 16:15 UTC1h 5m
2026-07-02 GBNHJ - Jul 2, 09:45 UTCJul 2, 11:10 UTC1h 25m
2026-07-01 GBNHJ - Jul 1, 13:45 UTCJul 1, 14:30 UTC45m
2026-07-01 GBNHJ - Jul 1, 11:50 UTCJul 1, 12:25 UTC35m
2026-07-01 GBNHJ - Jul 1, 09:35 UTCJul 1, 11:05 UTC1h 30m
2026-06-30 GBNHJ - Jun 30, 14:30 UTCJun 30, 15:40 UTC1h 10m
2026-06-30 GBNHJ - Jun 30, 12:35 UTCJun 30, 13:30 UTC55m
2026-06-30 GBNHJ - Jun 30, 10:50 UTCJun 30, 11:40 UTC50m
2026-06-29 GBNHJ - Jun 29, 14:29 UTCJun 29, 15:09 UTC40m
2026-06-29 GBNHJ - Jun 29, 12:24 UTCJun 29, 12:55 UTC30m
2026-06-29 GBNHJ - Jun 29, 10:50 UTCJun 29, 11:45 UTC55m
2026-06-29 GBNHJ - Jun 29, 09:54 UTCJun 29, 10:04 UTC10m
2026-06-28 GBNHJ - Jun 28, 12:39 UTCJun 28, 13:10 UTC30m
2026-06-28 GBNHJ - Jun 28, 10:19 UTCJun 28, 10:35 UTC15m
2026-06-28 GBNHJ - Jun 28, 08:34 UTCJun 28, 09:15 UTC40m
2026-06-27 GBNHJ - Jun 27, 14:20 UTCJun 27, 15:10 UTC50m
2026-06-27 GBNHJ - Jun 27, 12:29 UTCJun 27, 13:20 UTC50m
2026-06-27 GBNHJ - Jun 27, 10:05 UTCJun 27, 10:54 UTC50m
2026-06-26 GBNHJ - Jun 26, 15:45 UTCJun 26, 16:30 UTC45m
2026-06-26 GBNHJ - Jun 26, 13:19 UTCJun 26, 14:05 UTC45m
2026-06-26 GBNHJ - Jun 26, 10:44 UTCJun 26, 11:55 UTC1h 10m
2026-06-26 GBNHJ - Jun 26, 08:30 UTCJun 26, 09:24 UTC55m
2026-06-25 GBNHJ - Jun 25, 10:35 UTCJun 25, 11:19 UTC45m
2026-06-25 GBNHJ - Jun 25, 08:55 UTCJun 25, 09:40 UTC45m
2026-06-24 GBNHJ - Jun 24, 09:15 UTCJun 24, 10:55 UTC1h 40m
2026-06-23 GBNHJ - Jun 23, 15:09 UTCJun 23, 16:05 UTC55m
2026-06-23 GBNHJ - Jun 23, 08:59 UTCJun 23, 11:10 UTC2h 10m
2026-06-22 GBNHJ - Jun 22, 09:24 UTCJun 22, 10:00 UTC35m
2026-06-20 GBNHJ - Jun 20, 12:30 UTCJun 20, 13:34 UTC1h 5m
2026-06-20 GBNHJ - Jun 20, 09:24 UTCJun 20, 11:14 UTC1h 50m
2026-06-18 GBNHJ - Jun 18, 14:50 UTCJun 18, 15:55 UTC1h 5m
2026-06-18 GBNHJ - Jun 18, 12:50 UTCJun 18, 13:30 UTC40m
2026-06-18 GBNHJ - Jun 18, 11:00 UTCJun 18, 11:40 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-BNHJ page for operator, model, and routing details .

Mode-S 402901 frequently asked

What is Mode-S code 402901?
402901 is an ICAO 24-bit transponder address. Allocated to United Kingdom. Assigned to G-BNHJ.
Where is Mode-S 402901 registered?
Mode-S code 402901 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 402901 broadcasting right now?
No active broadcast right now. Last signal was 15h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 402901, octal 20024401, decimal 4,204,801.
What flights does 402901 operate?
Mode-S 402901 has broadcast 1 distinct callsign, including GBNHJ.