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sensors Mode-S transponder

400DC3

ICAO 24-bit transponder address · allocated to United Kingdom

Currently assigned to G-SASD · BEECH 200 Super King Air

Hex
400DC3
Octal
20006703
Decimal
4,197,827
Country
GB
Tail
G-SASD
Type
BE20
No current signal · last broadcast 27d ago
Flights observed
211
Distinct callsigns
7
Country
GB
Last broadcast
27d ago

Last known position

Most recent position reported by Mode-S 400DC3.

Country allocation

The ICAO 24-bit address 400DC3 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 7 distinct

Callsign Airline Flights Last seen
GMA01 - 132 2026-06-16
GMA01B - 44 2026-06-13
GMA03 - 12 2026-06-05
GMA01C - 11 2026-05-19
GMA03B - 8 2026-06-05
GMA03C - 2 2026-06-03
GMA018 - 2 2026-04-30

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-06-16 GMA01 - Jun 16, 10:45 UTCJun 16, 11:20 UTC35m
2026-06-16 GMA01 - Jun 16, 07:55 UTCJun 16, 08:25 UTC30m
2026-06-15 GMA01 - Jun 15, 23:35 UTCJun 15, 23:50 UTC15m
2026-06-15 GMA01 - Jun 15, 22:30 UTCJun 15, 22:49 UTC20m
2026-06-13 GMA01B - Jun 13, 15:10 UTCJun 13, 15:45 UTC35m
2026-06-13 GMA01B - Jun 13, 12:50 UTCJun 13, 13:25 UTC35m
2026-06-13 GMA01 GLA → GLA Jun 13, 08:20 UTCJun 13, 09:35 UTC1h 15m
2026-06-12 GMA01B - Jun 12, 23:45 UTCJun 13, 00:10 UTC25m
2026-06-12 GMA01B - Jun 12, 22:35 UTCJun 12, 22:55 UTC20m
2026-06-12 GMA01 - Jun 12, 16:00 UTCJun 12, 16:25 UTC25m
2026-06-12 GMA01 - Jun 12, 14:45 UTCJun 12, 15:00 UTC15m
2026-06-12 GMA01 - Jun 12, 12:15 UTCJun 12, 12:45 UTC30m
2026-06-11 GMA01 - Jun 11, 12:20 UTCJun 11, 12:50 UTC30m
2026-06-11 GMA01 - Jun 11, 08:35 UTCJun 11, 09:10 UTC35m
2026-06-10 GMA01 ABZ → GLA Jun 10, 15:55 UTCJun 10, 16:30 UTC35m
2026-06-10 GMA01 - Jun 10, 13:35 UTCJun 10, 13:50 UTC15m
2026-06-10 GMA01 - Jun 10, 11:35 UTCJun 10, 12:20 UTC45m
2026-06-10 GMA01 LPL → GLA Jun 10, 04:20 UTCJun 10, 05:10 UTC50m
2026-06-10 GMA01 GLA → LPL Jun 10, 01:05 UTCJun 10, 01:55 UTC50m
2026-06-09 GMA01 EDI → GLA Jun 9, 18:50 UTCJun 9, 19:15 UTC25m
2026-06-09 GMA01 ABZ → EDI Jun 9, 15:10 UTCJun 9, 15:50 UTC40m
2026-06-09 GMA01 GLA → ABZ Jun 9, 11:40 UTCJun 9, 12:15 UTC35m
2026-06-08 GMA01B - Jun 8, 23:30 UTCJun 8, 23:55 UTC25m
2026-06-08 GMA01B - Jun 8, 22:15 UTCJun 8, 22:35 UTC20m
2026-06-05 GMA03 ABZ → GLA Jun 5, 20:35 UTCJun 5, 21:10 UTC35m
2026-06-05 GMA03B - Jun 5, 16:20 UTCJun 5, 16:45 UTC25m
2026-06-05 GMA03B - Jun 5, 13:50 UTCJun 5, 14:20 UTC30m
2026-06-05 GMA03 - Jun 5, 11:55 UTCJun 5, 12:20 UTC25m
2026-06-05 GMA03 - Jun 5, 09:50 UTCJun 5, 10:15 UTC25m
2026-06-04 GMA03B - Jun 4, 14:50 UTCJun 4, 15:10 UTC20m
2026-06-04 GMA03B - Jun 4, 13:10 UTCJun 4, 13:35 UTC25m
2026-06-04 GMA03 - Jun 4, 09:20 UTCJun 4, 09:35 UTC15m
2026-06-04 GMA03 - Jun 4, 08:00 UTCJun 4, 08:20 UTC20m
2026-06-03 GMA03C - Jun 3, 21:45 UTCJun 3, 22:00 UTC15m
2026-06-03 GMA03C - Jun 3, 19:15 UTCJun 3, 19:35 UTC20m
2026-06-03 GMA03B GLA → ABZ Jun 3, 17:40 UTCJun 3, 18:15 UTC35m
2026-06-03 GMA03B - Jun 3, 16:25 UTCJun 3, 16:50 UTC25m
2026-06-03 GMA03B - Jun 3, 14:00 UTCJun 3, 14:15 UTC15m
2026-06-03 GMA03B - Jun 3, 09:30 UTCJun 3, 10:00 UTC30m
2026-06-03 GMA03 GLA → ABZ Jun 3, 04:30 UTCJun 3, 05:15 UTC45m
2026-06-03 GMA03 - Jun 3, 02:45 UTCJun 3, 03:15 UTC30m
2026-06-03 GMA03 - Jun 3, 01:50 UTCJun 3, 02:05 UTC15m
2026-06-02 GMA03 - Jun 2, 16:10 UTCJun 2, 16:45 UTC35m
2026-06-02 GMA03 - Jun 2, 13:10 UTCJun 2, 13:40 UTC30m
2026-06-01 GMA03 - Jun 1, 16:10 UTCJun 1, 16:35 UTC25m
2026-06-01 GMA03 - Jun 1, 12:45 UTCJun 1, 13:10 UTC25m
2026-05-30 GMA01 - May 30, 10:40 UTCMay 30, 10:50 UTC10m
2026-05-30 GMA01 - May 30, 08:45 UTCMay 30, 09:25 UTC40m
2026-05-29 GMA01 - May 29, 14:45 UTCMay 29, 15:10 UTC25m
2026-05-29 GMA01 - May 29, 13:40 UTCMay 29, 13:55 UTC15m

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

Mode-S 400DC3 frequently asked

What is Mode-S code 400DC3?
400DC3 is an ICAO 24-bit transponder address. Allocated to United Kingdom. Assigned to G-SASD.
Where is Mode-S 400DC3 registered?
Mode-S code 400DC3 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 400DC3 broadcasting right now?
No active broadcast right now. Last signal was 27d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 400DC3, octal 20006703, decimal 4,197,827.
What flights does 400DC3 operate?
Mode-S 400DC3 has broadcast 7 distinct callsigns, including GMA01, GMA01B, GMA03, GMA01C, GMA03B.