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sensors Mode-S transponder

402956

ICAO 24-bit transponder address · allocated to United Kingdom

Currently assigned to G-BNSN · CESSNA 152

Hex
402956
Octal
20024526
Decimal
4,204,886
Country
GB
Tail
G-BNSN
Type
C152
No current signal · last broadcast Jul 26, 13:10 UTC
Flights observed
121
Distinct callsigns
1
Country
GB
Last broadcast
Jul 26, 13:10 UTC

Last known position

Most recent position reported by Mode-S 402956.

Country allocation

The ICAO 24-bit address 402956 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
GBNSN - 121 2026-07-26

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 GBNSN - Jul 26, 12:25 UTCJul 26, 13:10 UTC45m
2026-07-26 GBNSN - Jul 26, 10:25 UTCJul 26, 11:15 UTC50m
2026-07-20 GBNSN - Jul 20, 14:05 UTCJul 20, 16:10 UTC2h 5m
2026-07-19 GBNSN - Jul 19, 14:05 UTCJul 19, 14:35 UTC30m
2026-07-19 GBNSN - Jul 19, 10:30 UTCJul 19, 12:05 UTC1h 35m
2026-07-19 GBNSN - Jul 19, 08:30 UTCJul 19, 09:10 UTC40m
2026-07-18 GBNSN - Jul 18, 08:20 UTCJul 18, 09:10 UTC50m
2026-07-16 GBNSN - Jul 16, 13:30 UTCJul 16, 14:05 UTC35m
2026-07-16 GBNSN - Jul 16, 10:55 UTCJul 16, 11:50 UTC55m
2026-07-15 GBNSN - Jul 15, 14:40 UTCJul 15, 15:25 UTC45m
2026-07-15 GBNSN - Jul 15, 13:10 UTCJul 15, 14:00 UTC50m
2026-07-15 GBNSN - Jul 15, 11:35 UTCJul 15, 12:15 UTC40m
2026-07-15 GBNSN - Jul 15, 10:10 UTCJul 15, 10:55 UTC45m
2026-07-14 GBNSN - Jul 14, 15:50 UTCJul 14, 16:55 UTC1h 5m
2026-07-14 GBNSN - Jul 14, 12:30 UTCJul 14, 14:20 UTC1h 50m
2026-07-14 GBNSN - Jul 14, 08:50 UTCJul 14, 09:10 UTC20m
2026-07-13 GBNSN - Jul 13, 11:25 UTCJul 13, 13:45 UTC2h 20m
2026-07-12 GBNSN - Jul 12, 11:40 UTCJul 12, 12:25 UTC45m
2026-07-12 GBNSN - Jul 12, 09:00 UTCJul 12, 09:40 UTC40m
2026-07-10 GBNSN - Jul 10, 17:15 UTCJul 10, 17:55 UTC40m
2026-07-10 GBNSN - Jul 10, 15:25 UTCJul 10, 16:15 UTC50m
2026-07-10 GBNSN - Jul 10, 13:25 UTCJul 10, 14:15 UTC50m
2026-07-10 GBNSN - Jul 10, 10:35 UTCJul 10, 11:20 UTC45m
2026-07-10 GBNSN - Jul 10, 08:10 UTCJul 10, 09:20 UTC1h 10m
2026-07-09 GBNSN - Jul 9, 14:05 UTCJul 9, 14:55 UTC50m
2026-07-09 GBNSN - Jul 9, 12:25 UTCJul 9, 13:10 UTC45m
2026-07-09 GBNSN - Jul 9, 11:00 UTCJul 9, 11:40 UTC40m
2026-07-08 GBNSN - Jul 8, 11:00 UTCJul 8, 11:50 UTC50m
2026-07-08 GBNSN - Jul 8, 08:30 UTCJul 8, 09:35 UTC1h 5m
2026-07-05 GBNSN - Jul 5, 14:35 UTCJul 5, 15:20 UTC45m
2026-07-04 GBNSN - Jul 4, 09:25 UTCJul 4, 10:30 UTC1h 5m
2026-07-03 GBNSN - Jul 3, 12:45 UTCJul 3, 13:30 UTC45m
2026-07-03 GBNSN - Jul 3, 11:00 UTCJul 3, 11:50 UTC50m
2026-07-03 GBNSN - Jul 3, 08:50 UTCJul 3, 09:40 UTC50m
2026-07-01 GBNSN - Jul 1, 12:20 UTCJul 1, 12:55 UTC35m
2026-06-30 GBNSN - Jun 30, 13:55 UTCJun 30, 14:40 UTC45m
2026-06-30 GBNSN - Jun 30, 12:00 UTCJun 30, 13:00 UTC1h 0m
2026-06-25 GBNSN - Jun 25, 14:34 UTCJun 25, 15:34 UTC1h 0m
2026-06-25 GBNSN - Jun 25, 08:55 UTCJun 25, 09:59 UTC1h 5m
2026-06-20 GBNSN - Jun 20, 13:09 UTCJun 20, 13:59 UTC50m
2026-06-20 GBNSN - Jun 20, 08:55 UTCJun 20, 09:39 UTC45m
2026-06-18 GBNSN - Jun 18, 15:55 UTCJun 18, 16:25 UTC30m
2026-06-18 GBNSN - Jun 18, 13:00 UTCJun 18, 14:01 UTC1h 0m
2026-06-16 GBNSN - Jun 16, 16:10 UTCJun 16, 16:39 UTC30m
2026-06-16 GBNSN - Jun 16, 14:30 UTCJun 16, 15:20 UTC50m
2026-06-16 GBNSN - Jun 16, 12:20 UTCJun 16, 13:00 UTC40m
2026-06-15 GBNSN - Jun 15, 15:10 UTCJun 15, 15:59 UTC50m
2026-06-15 GBNSN - Jun 15, 13:15 UTCJun 15, 13:40 UTC25m
2026-06-15 GBNSN - Jun 15, 11:45 UTCJun 15, 12:30 UTC45m
2026-06-15 GBNSN - Jun 15, 10:05 UTCJun 15, 10:50 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-BNSN page for operator, model, and routing details .

Mode-S 402956 frequently asked

What is Mode-S code 402956?
402956 is an ICAO 24-bit transponder address. Allocated to United Kingdom. Assigned to G-BNSN.
Where is Mode-S 402956 registered?
Mode-S code 402956 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 402956 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 13:10 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 402956, octal 20024526, decimal 4,204,886.
What flights does 402956 operate?
Mode-S 402956 has broadcast 1 distinct callsign, including GBNSN.