Apparatus

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sensors Mode-S transponder

401127

ICAO 24-bit transponder address · allocated to United Kingdom

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

Hex
401127
Octal
20010447
Decimal
4,198,695
Country
GB
Tail
G-BIHO
Type
DHC6
No current signal · last broadcast 46m ago
Flights observed
275
Distinct callsigns
20
Country
GB
Last broadcast
46m ago

Last known position

Most recent position reported by Mode-S 401127.

Country allocation

The ICAO 24-bit address 401127 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
AUR502 - 25 2026-07-06
AUR501 - 25 2026-07-06
AUR506 - 20 2026-07-14
AUR505 - 18 2026-07-14
AUR202 - 18 2026-07-06
GBIHO - 17 2026-07-09
AUR205 - 14 2026-07-06
AUR215 - 10 2026-06-26
AUR209 - 10 2026-07-14
AUR214 - 9 2026-07-13
AUR101P Aurigny Air Services 8 2026-06-09
IOS224 - 7 2026-05-30
AUR201 - 7 2026-06-27
AUR206 Aurigny Air Services 6 2026-06-10
AUR200 - 6 2026-06-26
AUR102P - 6 2026-06-08
IOS240 - 5 2026-06-04
IOS239 - 5 2026-05-30
IOS208 - 5 2026-05-27
AUR103P - 5 2026-07-13

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 AUR209 - Jul 14, 15:25 UTCJul 14, 15:45 UTC20m
2026-07-14 AUR506 - Jul 14, 14:00 UTCJul 14, 14:35 UTC35m
2026-07-14 AUR505 - Jul 14, 12:15 UTCJul 14, 13:55 UTC1h 40m
2026-07-13 AUR214 - Jul 13, 15:05 UTCJul 13, 18:05 UTC3h 0m
2026-07-13 AUR505 - Jul 13, 13:05 UTCJul 13, 15:00 UTC1h 55m
2026-07-13 AUR103P - Jul 13, 10:20 UTCJul 13, 11:35 UTC1h 15m
2026-07-09 GBIHO - Jul 9, 17:35 UTCJul 9, 18:20 UTC45m
2026-07-09 GBIHO - Jul 9, 16:10 UTCJul 9, 16:55 UTC45m
2026-07-09 GBIHO - Jul 9, 12:55 UTCJul 9, 14:10 UTC1h 15m
2026-07-09 GBIHO - Jul 9, 07:35 UTCJul 9, 08:15 UTC40m
2026-07-08 IOS258 - Jul 8, 14:45 UTCJul 8, 15:50 UTC1h 5m
2026-07-08 GBIHO - Jul 8, 10:40 UTCJul 8, 10:55 UTC15m
2026-07-08 GBIHO - Jul 8, 09:15 UTCJul 8, 09:25 UTC10m
2026-07-08 GBIHO - Jul 8, 07:40 UTCJul 8, 08:35 UTC55m
2026-07-07 IOS258 - Jul 7, 14:05 UTCJul 7, 15:20 UTC1h 15m
2026-07-07 GBIHO NQY → LEQ Jul 7, 10:35 UTCJul 7, 10:55 UTC20m
2026-07-07 AUR104P GCI → NQY Jul 7, 08:30 UTCJul 7, 09:30 UTC1h 0m
2026-07-06 AUR205 - Jul 6, 16:05 UTCJul 6, 16:25 UTC20m
2026-07-06 AUR502 SOU → ACI Jul 6, 14:55 UTCJul 6, 15:35 UTC40m
2026-07-06 AUR2501 - Jul 6, 13:45 UTCJul 6, 14:00 UTC15m
2026-07-06 AUR501 - Jul 6, 11:25 UTCJul 6, 12:45 UTC1h 20m
2026-07-06 AUR202 GCI → ACI Jul 6, 10:30 UTCJul 6, 10:55 UTC25m
2026-07-05 AUR506 - Jul 5, 13:05 UTCJul 5, 16:20 UTC3h 15m
2026-07-04 AUR214 GCI → GCI Jul 4, 17:20 UTCJul 4, 18:20 UTC1h 0m
2026-07-04 AUR506 SOU → GCI Jul 4, 15:20 UTCJul 4, 16:50 UTC1h 30m
2026-07-04 AUR505 - Jul 4, 13:20 UTCJul 4, 14:50 UTC1h 30m
2026-07-04 AUR103P - Jul 4, 10:40 UTCJul 4, 11:40 UTC1h 0m
2026-07-03 AUR104P - Jul 3, 12:10 UTCJul 3, 13:10 UTC1h 0m
2026-07-03 AUR501 ACI → GCI Jul 3, 08:40 UTCJul 3, 11:20 UTC2h 40m
2026-07-03 AUR202 - Jul 3, 06:30 UTCJul 3, 07:45 UTC1h 15m
2026-07-01 AUR209 - Jul 1, 14:05 UTCJul 1, 14:25 UTC20m
2026-07-01 AUR205 ACI → ACI Jul 1, 11:40 UTCJul 1, 12:40 UTC1h 0m
2026-07-01 AUR502 - Jul 1, 10:20 UTCJul 1, 11:00 UTC40m
2026-07-01 AUR202 GCI → SOU Jul 1, 06:30 UTCJul 1, 09:20 UTC2h 50m
2026-06-29 AUR504 - Jun 29, 09:10 UTCJun 29, 10:34 UTC1h 25m
2026-06-29 AUR503 GCI → SOU Jun 29, 07:05 UTCJun 29, 08:39 UTC1h 35m
2026-06-28 AUR508 - Jun 28, 16:05 UTCJun 28, 17:30 UTC1h 25m
2026-06-28 AUR507 - Jun 28, 14:45 UTCJun 28, 16:00 UTC1h 15m
2026-06-28 AUR504 GCI → ACI Jun 28, 11:19 UTCJun 28, 14:04 UTC2h 45m
2026-06-27 AUR998 GCI → GCI Jun 27, 13:40 UTCJun 27, 14:35 UTC55m
2026-06-27 AUR501 - Jun 27, 08:10 UTCJun 27, 09:24 UTC1h 15m
2026-06-27 AUR201 - Jun 27, 06:50 UTCJun 27, 07:49 UTC1h 0m
2026-06-26 AUR215 GCI → GCI Jun 26, 17:35 UTCJun 26, 18:24 UTC50m
2026-06-26 AUR506 GCI → GCI Jun 26, 13:45 UTCJun 26, 17:00 UTC3h 15m
2026-06-26 AUR502 SOU → GCI Jun 26, 11:20 UTCJun 26, 12:50 UTC1h 30m
2026-06-26 AUR501 ACI → SOU Jun 26, 09:39 UTCJun 26, 10:30 UTC50m
2026-06-26 AUR200 - Jun 26, 06:39 UTCJun 26, 06:54 UTC15m
2026-06-25 AUR215 - Jun 25, 16:29 UTCJun 25, 17:14 UTC45m
2026-06-25 AUR209 ACI → GCI Jun 25, 15:15 UTCJun 25, 15:40 UTC25m
2026-06-25 AUR506 - Jun 25, 13:59 UTCJun 25, 14:39 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-BIHO page for operator, model, and routing details .

Mode-S 401127 frequently asked

What is Mode-S code 401127?
401127 is an ICAO 24-bit transponder address. Allocated to United Kingdom. Assigned to G-BIHO.
Where is Mode-S 401127 registered?
Mode-S code 401127 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 401127 broadcasting right now?
No active broadcast right now. Last signal was 46m ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 401127, octal 20010447, decimal 4,198,695.
What flights does 401127 operate?
Mode-S 401127 has broadcast 20 distinct callsigns, including AUR502, AUR501, AUR506, AUR505, AUR202.