Apparatus

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sensors Mode-S transponder

40778E

ICAO 24-bit transponder address · allocated to United Kingdom

Currently assigned to G-CLDB · EVEKTRO EV-97 EuroStar

Hex
40778E
Octal
20073616
Decimal
4,224,910
Country
GB
Tail
G-CLDB
Type
EV97
No current signal · last broadcast 5h ago
Flights observed
88
Distinct callsigns
1
Country
GB
Last broadcast
5h ago

Last known position

Most recent position reported by Mode-S 40778E.

Country allocation

The ICAO 24-bit address 40778E 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
GCLDB - 88 2026-07-23

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-23 GCLDB - Jul 23, 17:10 UTCJul 23, 18:15 UTC1h 5m
2026-07-23 GCLDB - Jul 23, 15:30 UTCJul 23, 16:35 UTC1h 5m
2026-07-23 GCLDB - Jul 23, 14:40 UTCJul 23, 14:50 UTC10m
2026-07-23 GCLDB - Jul 23, 13:25 UTCJul 23, 13:40 UTC15m
2026-07-23 GCLDB - Jul 23, 12:15 UTCJul 23, 12:40 UTC25m
2026-07-23 GCLDB - Jul 23, 10:15 UTCJul 23, 11:10 UTC55m
2026-07-23 GCLDB - Jul 23, 08:05 UTCJul 23, 09:20 UTC1h 15m
2026-07-22 GCLDB HYC → HYC Jul 22, 17:45 UTCJul 22, 18:45 UTC1h 0m
2026-07-18 GCLDB HYC → HYC Jul 18, 17:30 UTCJul 18, 18:50 UTC1h 20m
2026-07-18 GCLDB - Jul 18, 16:05 UTCJul 18, 16:50 UTC45m
2026-07-18 GCLDB - Jul 18, 13:55 UTCJul 18, 14:50 UTC55m
2026-07-18 GCLDB - Jul 18, 11:50 UTCJul 18, 12:20 UTC30m
2026-07-18 GCLDB - Jul 18, 08:40 UTCJul 18, 10:15 UTC1h 35m
2026-07-12 GCLDB - Jul 12, 14:10 UTCJul 12, 14:30 UTC20m
2026-07-12 GCLDB - Jul 12, 12:20 UTCJul 12, 13:35 UTC1h 15m
2026-07-12 GCLDB - Jul 12, 09:25 UTCJul 12, 10:25 UTC1h 0m
2026-07-10 GCLDB - Jul 10, 17:20 UTCJul 10, 18:40 UTC1h 20m
2026-07-10 GCLDB - Jul 10, 14:55 UTCJul 10, 15:35 UTC40m
2026-07-09 GCLDB - Jul 9, 17:15 UTCJul 9, 18:55 UTC1h 40m
2026-07-09 GCLDB - Jul 9, 14:05 UTCJul 9, 15:40 UTC1h 35m
2026-07-08 GCLDB - Jul 8, 15:30 UTCJul 8, 16:05 UTC35m
2026-07-08 GCLDB - Jul 8, 13:40 UTCJul 8, 14:05 UTC25m
2026-07-08 GCLDB - Jul 8, 08:30 UTCJul 8, 09:40 UTC1h 10m
2026-07-07 GCLDB - Jul 7, 09:55 UTCJul 7, 11:05 UTC1h 10m
2026-07-07 GCLDB - Jul 7, 08:05 UTCJul 7, 09:00 UTC55m
2026-07-05 GCLDB - Jul 5, 11:35 UTCJul 5, 12:10 UTC35m
2026-07-03 GCLDB - Jul 3, 15:45 UTCJul 3, 16:05 UTC20m
2026-07-03 GCLDB - Jul 3, 14:20 UTCJul 3, 14:30 UTC10m
2026-07-03 GCLDB - Jul 3, 12:45 UTCJul 3, 13:15 UTC30m
2026-07-03 GCLDB - Jul 3, 10:55 UTCJul 3, 12:00 UTC1h 5m
2026-07-03 GCLDB - Jul 3, 09:25 UTCJul 3, 10:15 UTC50m
2026-07-03 GCLDB - Jul 3, 08:25 UTCJul 3, 08:50 UTC25m
2026-07-02 GCLDB HYC → HYC Jul 2, 14:55 UTCJul 2, 15:40 UTC45m
2026-06-30 GCLDB - Jun 30, 13:15 UTCJun 30, 14:30 UTC1h 15m
2026-06-30 GCLDB - Jun 30, 10:05 UTCJun 30, 11:05 UTC1h 0m
2026-06-27 GCLDB - Jun 27, 17:55 UTCJun 27, 18:39 UTC45m
2026-06-27 GCLDB - Jun 27, 09:34 UTCJun 27, 10:10 UTC35m
2026-06-22 GCLDB - Jun 22, 17:00 UTCJun 22, 17:44 UTC45m
2026-06-22 GCLDB - Jun 22, 12:54 UTCJun 22, 13:29 UTC35m
2026-06-21 GCLDB - Jun 21, 14:30 UTCJun 21, 14:54 UTC25m
2026-06-20 GCLDB - Jun 20, 15:49 UTCJun 20, 16:44 UTC55m
2026-06-20 GCLDB - Jun 20, 11:20 UTCJun 20, 12:14 UTC55m
2026-06-11 GCLDB HYC → HYC Jun 11, 09:10 UTCJun 11, 09:20 UTC10m
2026-06-07 GCLDB HYC → HYC Jun 7, 09:05 UTCJun 7, 10:05 UTC1h 0m
2026-05-31 GCLDB - May 31, 13:20 UTCMay 31, 16:00 UTC2h 40m
2026-05-31 GCLDB - May 31, 12:20 UTCMay 31, 12:45 UTC25m
2026-05-31 GCLDB HYC → HYC May 31, 09:15 UTCMay 31, 10:30 UTC1h 15m
2026-05-30 GCLDB HYC → HYC May 30, 15:10 UTCMay 30, 16:05 UTC55m
2026-05-27 GCLDB - May 27, 14:35 UTCMay 27, 15:30 UTC55m
2026-05-27 GCLDB - May 27, 13:00 UTCMay 27, 13:45 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-CLDB page for operator, model, and routing details .

Mode-S 40778E frequently asked

What is Mode-S code 40778E?
40778E is an ICAO 24-bit transponder address. Allocated to United Kingdom. Assigned to G-CLDB.
Where is Mode-S 40778E registered?
Mode-S code 40778E 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 40778E broadcasting right now?
No active broadcast right now. Last signal was 5h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 40778E, octal 20073616, decimal 4,224,910.
What flights does 40778E operate?
Mode-S 40778E has broadcast 1 distinct callsign, including GCLDB.