Apparatus

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sensors Mode-S transponder

4012DA

ICAO 24-bit transponder address · allocated to United Kingdom

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

Hex
4012DA
Octal
20011332
Decimal
4,199,130
Country
GB
Tail
G-CEWM
Type
DHC6
No current signal · last broadcast Jul 26, 11:50 UTC
Flights observed
285
Distinct callsigns
20
Country
GB
Last broadcast
Jul 26, 11:50 UTC

Last known position

Most recent position reported by Mode-S 4012DA.

Country allocation

The ICAO 24-bit address 4012DA 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
GCEWM - 31 2026-07-26
AUR506 - 27 2026-07-19
AUR505 Aurigny Air Services 24 2026-07-21
AUR502 - 23 2026-07-21
AUR501 Aurigny Air Services 23 2026-07-21
AUR202 - 15 2026-07-21
AUR215 - 14 2026-07-20
AUR209 Aurigny Air Services 14 2026-07-21
AUR205 - 11 2026-07-22
IOS240 - 8 2026-06-26
IOS224 - 7 2026-06-25
AUR206 - 7 2026-07-20
AUR214 - 6 2026-06-27
AUR201 - 6 2026-07-21
AUR101P Aurigny Air Services 6 2026-06-13
IOS239 - 5 2026-06-26
AUR999 Aurigny Air Services 5 2026-06-02
IOS512N - 4 2026-07-18
AUR998 Aurigny Air Services 4 2026-05-31
AUR200 - 4 2026-07-17

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 GCEWM - Jul 26, 09:30 UTCJul 26, 11:50 UTC2h 20m
2026-07-25 GCEWM - Jul 25, 14:00 UTCJul 25, 14:50 UTC50m
2026-07-25 GCEWM - Jul 25, 11:10 UTCJul 25, 12:45 UTC1h 35m
2026-07-24 GCEWM - Jul 24, 17:10 UTCJul 24, 17:25 UTC15m
2026-07-24 GCEWM - Jul 24, 15:10 UTCJul 24, 16:15 UTC1h 5m
2026-07-24 GCEWM - Jul 24, 08:55 UTCJul 24, 10:25 UTC1h 30m
2026-07-23 GCEWM - Jul 23, 15:05 UTCJul 23, 16:15 UTC1h 10m
2026-07-22 AUR104P - Jul 22, 12:30 UTCJul 22, 13:20 UTC50m
2026-07-22 AUR205 - Jul 22, 11:25 UTCJul 22, 11:45 UTC20m
2026-07-21 AUR209 ACI → GCI Jul 21, 14:40 UTCJul 21, 17:25 UTC2h 45m
2026-07-21 AUR505 ACI → SOU Jul 21, 12:50 UTCJul 21, 14:05 UTC1h 15m
2026-07-21 AUR205 - Jul 21, 11:15 UTCJul 21, 11:30 UTC15m
2026-07-21 AUR502 - Jul 21, 09:50 UTCJul 21, 10:25 UTC35m
2026-07-21 AUR501 ACI → SOU Jul 21, 08:40 UTCJul 21, 09:15 UTC35m
2026-07-21 AUR202 GCI → ACI Jul 21, 07:45 UTCJul 21, 08:00 UTC15m
2026-07-21 AUR201 - Jul 21, 06:30 UTCJul 21, 07:30 UTC1h 0m
2026-07-20 AUR215 GCI → GCI Jul 20, 16:40 UTCJul 20, 17:35 UTC55m
2026-07-20 AUR505 - Jul 20, 13:15 UTCJul 20, 15:40 UTC2h 25m
2026-07-20 AUR206 - Jul 20, 12:30 UTCJul 20, 12:40 UTC10m
2026-07-19 AUR215 GCI → GCI Jul 19, 17:20 UTCJul 19, 18:15 UTC55m
2026-07-19 AUR209 - Jul 19, 16:20 UTCJul 19, 16:55 UTC35m
2026-07-19 AUR506 - Jul 19, 14:50 UTCJul 19, 15:30 UTC40m
2026-07-19 AUR505 - Jul 19, 12:50 UTCJul 19, 14:05 UTC1h 15m
2026-07-18 AUR506 - Jul 18, 18:05 UTCJul 18, 19:05 UTC1h 0m
2026-07-18 AUR105P LEQ → GCI Jul 18, 15:40 UTCJul 18, 17:30 UTC1h 50m
2026-07-18 IOS512N - Jul 18, 11:55 UTCJul 18, 13:55 UTC2h 0m
2026-07-18 IOS505F - Jul 18, 10:05 UTCJul 18, 10:50 UTC45m
2026-07-18 IOS504E - Jul 18, 08:45 UTCJul 18, 09:30 UTC45m
2026-07-17 AUR104P - Jul 17, 13:10 UTCJul 17, 14:10 UTC1h 0m
2026-07-17 AUR502 SOU → GCI Jul 17, 10:30 UTCJul 17, 11:55 UTC1h 25m
2026-07-17 AUR501 - Jul 17, 08:49 UTCJul 17, 09:25 UTC35m
2026-07-17 AUR202 - Jul 17, 07:55 UTCJul 17, 08:04 UTC10m
2026-07-17 AUR200 GCI → GCI Jul 17, 06:29 UTCJul 17, 07:25 UTC55m
2026-07-16 AUR205 - Jul 16, 11:40 UTCJul 16, 12:05 UTC25m
2026-07-16 AUR502 SOU → ACI Jul 16, 10:15 UTCJul 16, 11:05 UTC50m
2026-07-16 AUR501 - Jul 16, 08:50 UTCJul 16, 09:30 UTC40m
2026-07-16 AUR202 GCI → ACI Jul 16, 06:35 UTCJul 16, 08:15 UTC1h 40m
2026-07-15 AUR215 - Jul 15, 16:45 UTCJul 15, 17:30 UTC45m
2026-07-15 AUR506 SOU → GCI Jul 15, 14:40 UTCJul 15, 16:05 UTC1h 25m
2026-07-15 GR505 - Jul 15, 12:40 UTCJul 15, 14:00 UTC1h 20m
2026-07-15 AUR103P - Jul 15, 10:45 UTCJul 15, 11:50 UTC1h 5m
2026-07-15 GCEWM - Jul 15, 09:40 UTCJul 15, 09:50 UTC10m
2026-07-14 GCEWM - Jul 14, 16:15 UTCJul 14, 17:10 UTC55m
2026-07-10 GCEWM - Jul 10, 15:20 UTCJul 10, 16:35 UTC1h 15m
2026-07-10 GCEWM - Jul 10, 13:35 UTCJul 10, 13:45 UTC10m
2026-07-10 GCEWM - Jul 10, 11:45 UTCJul 10, 12:10 UTC25m
2026-07-09 GCEWM - Jul 9, 16:20 UTCJul 9, 16:30 UTC10m
2026-07-07 GCEWM - Jul 7, 13:35 UTCJul 7, 13:55 UTC20m
2026-07-06 GCEWM - Jul 6, 13:30 UTCJul 6, 13:50 UTC20m
2026-07-06 GCEWM LEQ → LEQ Jul 6, 08:15 UTCJul 6, 08:20 UTC5m

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

Mode-S 4012DA frequently asked

What is Mode-S code 4012DA?
4012DA is an ICAO 24-bit transponder address. Allocated to United Kingdom. Assigned to G-CEWM.
Where is Mode-S 4012DA registered?
Mode-S code 4012DA 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 4012DA broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 11:50 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 4012DA, octal 20011332, decimal 4,199,130.
What flights does 4012DA operate?
Mode-S 4012DA has broadcast 20 distinct callsigns, including GCEWM, AUR506, AUR505, AUR502, AUR501.