Apparatus

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sensors Mode-S transponder

401128

ICAO 24-bit transponder address · allocated to United Kingdom

Currently assigned to G-CBML · DE HAVILLAND DHC-6 Twin Otter

Hex
401128
Octal
20010450
Decimal
4,198,696
Country
GB
Tail
G-CBML
Type
DHC6
No current signal · last broadcast 12h ago
Flights observed
272
Distinct callsigns
20
Country
GB
Last broadcast
12h ago

Last known position

Most recent position reported by Mode-S 401128.

Country allocation

The ICAO 24-bit address 401128 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 20 distinct

Callsign Airline Flights Last seen
AUR501 - 31 2026-07-11
AUR502 - 27 2026-07-12
AUR506 - 23 2026-07-10
AUR505 - 22 2026-07-10
AUR205 - 18 2026-07-12
AUR202 - 18 2026-07-08
AUR209 - 13 2026-07-10
AUR214 - 11 2026-07-10
AUR215 - 10 2026-06-24
AUR200 - 10 2026-07-11
GCBML - 9 2026-07-09
AUR206 - 9 2026-07-06
AUR201 - 8 2026-07-04
AUR102P - 8 2026-06-10
IOS512N - 5 2026-07-13
IOS224 - 5 2026-06-05
AUR101P Aurigny Air Services 5 2026-06-06
IOS513P - 4 2026-06-20
IOS505F - 4 2026-07-13
IOS504E - 4 2026-07-13

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-13 IOS512N - Jul 13, 11:45 UTCJul 13, 13:50 UTC2h 5m
2026-07-13 IOS505F - Jul 13, 10:05 UTCJul 13, 10:45 UTC40m
2026-07-13 IOS504E - Jul 13, 08:40 UTCJul 13, 09:35 UTC55m
2026-07-12 AUR104P - Jul 12, 14:50 UTCJul 12, 15:45 UTC55m
2026-07-12 AUR205 - Jul 12, 14:10 UTCJul 12, 14:45 UTC35m
2026-07-12 AUR502 GCI → ACI Jul 12, 11:10 UTCJul 12, 13:35 UTC2h 25m
2026-07-11 AUR205 - Jul 11, 11:20 UTCJul 11, 11:35 UTC15m
2026-07-11 AUR502 SOU → ACI Jul 11, 10:00 UTCJul 11, 10:45 UTC45m
2026-07-11 AUR501 - Jul 11, 08:40 UTCJul 11, 09:15 UTC35m
2026-07-11 AUR200 - Jul 11, 06:20 UTCJul 11, 08:01 UTC1h 40m
2026-07-10 AUR214 - Jul 10, 17:20 UTCJul 10, 18:05 UTC45m
2026-07-10 AUR209 - Jul 10, 16:05 UTCJul 10, 16:20 UTC15m
2026-07-10 AUR506 SOU → ACI Jul 10, 14:50 UTCJul 10, 15:30 UTC40m
2026-07-10 AUR505 - Jul 10, 12:50 UTCJul 10, 14:20 UTC1h 30m
2026-07-09 AUR209 - Jul 9, 16:45 UTCJul 9, 18:40 UTC1h 55m
2026-07-09 AUR103P - Jul 9, 15:15 UTCJul 9, 16:10 UTC55m
2026-07-09 GCBML - Jul 9, 07:45 UTCJul 9, 09:20 UTC1h 35m
2026-07-08 AUR104P - Jul 8, 13:00 UTCJul 8, 14:00 UTC1h 0m
2026-07-08 AUR205 - Jul 8, 11:40 UTCJul 8, 12:00 UTC20m
2026-07-08 AUR502 - Jul 8, 10:25 UTCJul 8, 11:05 UTC40m
2026-07-08 AUR501 - Jul 8, 08:45 UTCJul 8, 09:20 UTC35m
2026-07-08 AUR202 GCI → ACI Jul 8, 06:30 UTCJul 8, 08:10 UTC1h 40m
2026-07-07 AUR205 ACI → GCI Jul 7, 12:05 UTCJul 7, 12:30 UTC25m
2026-07-07 AUR502 SOU → ACI Jul 7, 10:55 UTCJul 7, 11:30 UTC35m
2026-07-07 AUR501 - Jul 7, 09:40 UTCJul 7, 10:15 UTC35m
2026-07-07 AUR202 - Jul 7, 06:30 UTCJul 7, 09:35 UTC3h 5m
2026-07-06 AUR214 - Jul 6, 15:55 UTCJul 6, 17:55 UTC2h 0m
2026-07-06 AUR505 - Jul 6, 13:30 UTCJul 6, 15:25 UTC1h 55m
2026-07-06 AUR206 GCI → ACI Jul 6, 12:35 UTCJul 6, 12:55 UTC20m
2026-07-05 AUR502 SOU → GCI Jul 5, 10:25 UTCJul 5, 11:55 UTC1h 30m
2026-07-05 AUR202 GCI → SOU Jul 5, 06:35 UTCJul 5, 09:30 UTC2h 55m
2026-07-04 AUR202 GCI → GCI Jul 4, 13:05 UTCJul 4, 14:00 UTC55m
2026-07-04 AUR201 ACI → GCI Jul 4, 11:50 UTCJul 4, 12:20 UTC30m
2026-07-04 AUR502 SOU → ACI Jul 4, 10:40 UTCJul 4, 11:20 UTC40m
2026-07-04 AUR501 ACI → SOU Jul 4, 09:10 UTCJul 4, 10:00 UTC50m
2026-07-04 AUR200 GCI → ACI Jul 4, 06:25 UTCJul 4, 06:45 UTC20m
2026-07-03 AUR214 GCI → GCI Jul 3, 13:10 UTCJul 3, 18:05 UTC4h 55m
2026-07-02 AUR209 - Jul 2, 14:20 UTCJul 2, 14:40 UTC20m
2026-07-02 AUR501 GCI → ACI Jul 2, 10:00 UTCJul 2, 13:50 UTC3h 50m
2026-06-30 AUR209 - Jun 30, 14:20 UTCJun 30, 14:45 UTC25m
2026-06-30 AUR206 SOU → ACI Jun 30, 10:10 UTCJun 30, 12:25 UTC2h 15m
2026-06-30 AUR501 - Jun 30, 08:45 UTCJun 30, 09:40 UTC55m
2026-06-30 AUR202 - Jun 30, 07:10 UTCJun 30, 08:05 UTC55m
2026-06-30 AUR200 GCI → ACI Jun 30, 06:10 UTCJun 30, 06:40 UTC30m
2026-06-29 AUR103P - Jun 29, 11:25 UTCJun 29, 17:24 UTC6h 0m
2026-06-26 AUR104P - Jun 26, 13:10 UTCJun 26, 15:54 UTC2h 45m
2026-06-26 AUR504 - Jun 26, 10:44 UTCJun 26, 12:44 UTC2h 0m
2026-06-26 AUR503P - Jun 26, 08:45 UTCJun 26, 09:35 UTC50m
2026-06-26 AUR102 - Jun 26, 07:00 UTCJun 26, 07:45 UTC45m
2026-06-25 AUR508 - Jun 25, 13:35 UTCJun 25, 16:09 UTC2h 35m

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

Mode-S 401128 frequently asked

What is Mode-S code 401128?
401128 is an ICAO 24-bit transponder address. Allocated to United Kingdom. Assigned to G-CBML.
Where is Mode-S 401128 registered?
Mode-S code 401128 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 401128 broadcasting right now?
No active broadcast right now. Last signal was 12h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 401128, octal 20010450, decimal 4,198,696.
What flights does 401128 operate?
Mode-S 401128 has broadcast 20 distinct callsigns, including AUR501, AUR502, AUR506, AUR505, AUR205.