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sensors Mode-S transponder

4078C9

ICAO 24-bit transponder address · allocated to United Kingdom

Currently assigned to G-TBDI · IKARUS C-42 Bison

Hex
4078C9
Octal
20074311
Decimal
4,225,225
Country
GB
Tail
G-TBDI
Type
C42
No current signal · last broadcast 2d ago
Flights observed
69
Distinct callsigns
1
Country
GB
Last broadcast
2d ago

Last known position

Most recent position reported by Mode-S 4078C9.

Country allocation

The ICAO 24-bit address 4078C9 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
GTBDI - 69 2026-07-11

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-11 GTBDI HYC → HYC Jul 11, 10:50 UTCJul 11, 11:55 UTC1h 5m
2026-07-11 GTBDI - Jul 11, 09:05 UTCJul 11, 09:30 UTC25m
2026-07-06 GTBDI - Jul 6, 10:40 UTCJul 6, 11:15 UTC35m
2026-07-06 GTBDI - Jul 6, 08:45 UTCJul 6, 09:35 UTC50m
2026-07-04 GTBDI - Jul 4, 11:15 UTCJul 4, 11:55 UTC40m
2026-07-04 GTBDI HYC → HYC Jul 4, 09:15 UTCJul 4, 09:50 UTC35m
2026-07-03 GTBDI HYC → HYC Jul 3, 13:25 UTCJul 3, 14:20 UTC55m
2026-07-03 GTBDI HYC → HYC Jul 3, 10:50 UTCJul 3, 11:55 UTC1h 5m
2026-07-03 GTBDI HYC → HYC Jul 3, 09:15 UTCJul 3, 10:10 UTC55m
2026-07-03 GTBDI HYC → HYC Jul 3, 07:55 UTCJul 3, 08:20 UTC25m
2026-06-30 GTBDI - Jun 30, 14:30 UTCJun 30, 15:05 UTC35m
2026-06-30 GTBDI - Jun 30, 12:55 UTCJun 30, 13:35 UTC40m
2026-06-30 GTBDI HYC → HYC Jun 30, 09:05 UTCJun 30, 09:35 UTC30m
2026-06-29 GTBDI - Jun 29, 10:55 UTCJun 29, 11:45 UTC50m
2026-06-29 GTBDI - Jun 29, 09:34 UTCJun 29, 10:10 UTC35m
2026-06-29 GTBDI HYC → HYC Jun 29, 08:29 UTCJun 29, 09:00 UTC30m
2026-06-27 GTBDI HYC → HYC Jun 27, 11:04 UTCJun 27, 11:44 UTC40m
2026-06-27 GTBDI HYC → HYC Jun 27, 09:19 UTCJun 27, 10:19 UTC1h 0m
2026-06-23 GTBDI - Jun 23, 10:59 UTCJun 23, 11:54 UTC55m
2026-06-23 GTBDI - Jun 23, 09:14 UTCJun 23, 09:49 UTC35m
2026-06-20 GTBDI - Jun 20, 10:34 UTCJun 20, 11:20 UTC45m
2026-06-19 GTBDI - Jun 19, 10:35 UTCJun 19, 11:04 UTC30m
2026-06-19 GTBDI - Jun 19, 08:44 UTCJun 19, 09:34 UTC50m
2026-06-16 GTBDI HYC → HYC Jun 16, 14:25 UTCJun 16, 14:55 UTC30m
2026-06-16 GTBDI HYC → HYC Jun 16, 11:10 UTCJun 16, 12:10 UTC1h 0m
2026-06-16 GTBDI HYC → HYC Jun 16, 09:15 UTCJun 16, 10:09 UTC55m
2026-06-15 GTBDI - Jun 15, 11:15 UTCJun 15, 11:49 UTC35m
2026-06-15 GTBDI - Jun 15, 09:54 UTCJun 15, 10:30 UTC35m
2026-06-13 GTBDI HYC → HYC Jun 13, 13:30 UTCJun 13, 14:25 UTC55m
2026-06-13 GTBDI HYC → HYC Jun 13, 08:55 UTCJun 13, 09:55 UTC1h 0m
2026-06-07 GTBDI - Jun 7, 12:10 UTCJun 7, 13:15 UTC1h 5m
2026-06-07 GTBDI HYC → HYC Jun 7, 09:30 UTCJun 7, 10:25 UTC55m
2026-06-05 GTBDI HYC → HYC Jun 5, 14:05 UTCJun 5, 14:35 UTC30m
2026-06-02 GTBDI HYC → HYC Jun 2, 11:40 UTCJun 2, 12:10 UTC30m
2026-05-30 GTBDI HYC → HYC May 30, 13:55 UTCMay 30, 14:50 UTC55m
2026-05-30 GTBDI HYC → HYC May 30, 12:15 UTCMay 30, 13:15 UTC1h 0m
2026-05-30 GTBDI HYC → HYC May 30, 10:45 UTCMay 30, 11:35 UTC50m
2026-05-30 GTBDI HYC → HYC May 30, 08:15 UTCMay 30, 09:10 UTC55m
2026-05-29 GTBDI - May 29, 09:55 UTCMay 29, 10:05 UTC10m
2026-05-28 GTBDI HYC → HYC May 28, 10:55 UTCMay 28, 11:40 UTC45m
2026-05-28 GTBDI HYC → HYC May 28, 08:25 UTCMay 28, 09:20 UTC55m
2026-05-26 GTBDI - May 26, 10:44 UTCMay 26, 11:15 UTC30m
2026-05-26 GTBDI - May 26, 09:29 UTCMay 26, 10:05 UTC35m
2026-05-26 GTBDI - May 26, 07:05 UTCMay 26, 07:15 UTC10m
2026-05-25 GTBDI - May 25, 10:30 UTCMay 25, 11:00 UTC30m
2026-05-25 GTBDI - May 25, 08:55 UTCMay 25, 09:40 UTC45m
2026-05-23 GTBDI HYC → HYC May 23, 13:50 UTCMay 23, 14:50 UTC1h 0m
2026-05-23 GTBDI HYC → HYC May 23, 11:20 UTCMay 23, 12:30 UTC1h 10m
2026-05-23 GTBDI HYC → HYC May 23, 09:10 UTCMay 23, 10:20 UTC1h 10m
2026-05-21 GTBDI - May 21, 13:25 UTCMay 21, 13:55 UTC30m

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

Mode-S 4078C9 frequently asked

What is Mode-S code 4078C9?
4078C9 is an ICAO 24-bit transponder address. Allocated to United Kingdom. Assigned to G-TBDI.
Where is Mode-S 4078C9 registered?
Mode-S code 4078C9 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 4078C9 broadcasting right now?
No active broadcast right now. Last signal was 2d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 4078C9, octal 20074311, decimal 4,225,225.
What flights does 4078C9 operate?
Mode-S 4078C9 has broadcast 1 distinct callsign, including GTBDI.