Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

40116C

ICAO 24-bit transponder address · allocated to United Kingdom

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

Hex
40116C
Octal
20010554
Decimal
4,198,764
Country
GB
Tail
G-CDOK
Type
C42
No current signal · last broadcast 14h ago
Flights observed
142
Distinct callsigns
1
Country
GB
Last broadcast
14h ago

Last known position

Most recent position reported by Mode-S 40116C.

Country allocation

The ICAO 24-bit address 40116C 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
GCDOK - 142 2026-07-17

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-17 GCDOK - Jul 17, 14:15 UTCJul 17, 14:55 UTC40m
2026-07-17 GCDOK - Jul 17, 12:45 UTCJul 17, 13:20 UTC35m
2026-07-16 GCDOK - Jul 16, 16:30 UTCJul 16, 17:14 UTC45m
2026-07-16 GCDOK - Jul 16, 12:55 UTCJul 16, 13:20 UTC25m
2026-07-15 GCDOK - Jul 15, 10:40 UTCJul 15, 11:25 UTC45m
2026-07-15 GCDOK - Jul 15, 08:25 UTCJul 15, 09:35 UTC1h 10m
2026-07-11 GCDOK - Jul 11, 08:55 UTCJul 11, 09:45 UTC50m
2026-07-11 GCDOK - Jul 11, 06:55 UTCJul 11, 07:50 UTC55m
2026-07-10 GCDOK - Jul 10, 08:50 UTCJul 10, 09:45 UTC55m
2026-07-10 GCDOK - Jul 10, 07:00 UTCJul 10, 07:50 UTC50m
2026-07-08 GCDOK - Jul 8, 14:25 UTCJul 8, 15:10 UTC45m
2026-07-08 GCDOK - Jul 8, 12:35 UTCJul 8, 13:20 UTC45m
2026-07-08 GCDOK - Jul 8, 10:25 UTCJul 8, 10:45 UTC20m
2026-07-08 GCDOK - Jul 8, 08:25 UTCJul 8, 08:55 UTC30m
2026-07-06 GCDOK - Jul 6, 14:55 UTCJul 6, 15:45 UTC50m
2026-07-06 GCDOK - Jul 6, 11:45 UTCJul 6, 12:10 UTC25m
2026-07-06 GCDOK - Jul 6, 09:35 UTCJul 6, 10:15 UTC40m
2026-07-05 GCDOK - Jul 5, 16:20 UTCJul 5, 17:10 UTC50m
2026-07-05 GCDOK - Jul 5, 14:30 UTCJul 5, 15:15 UTC45m
2026-07-04 GCDOK - Jul 4, 14:55 UTCJul 4, 15:40 UTC45m
2026-07-04 GCDOK - Jul 4, 12:40 UTCJul 4, 13:20 UTC40m
2026-07-03 GCDOK - Jul 3, 16:20 UTCJul 3, 17:00 UTC40m
2026-07-03 GCDOK - Jul 3, 14:10 UTCJul 3, 14:45 UTC35m
2026-07-03 GCDOK - Jul 3, 12:45 UTCJul 3, 13:20 UTC35m
2026-07-03 GCDOK - Jul 3, 11:05 UTCJul 3, 11:30 UTC25m
2026-07-03 GCDOK - Jul 3, 08:40 UTCJul 3, 09:10 UTC30m
2026-07-01 GCDOK - Jul 1, 16:10 UTCJul 1, 16:35 UTC25m
2026-07-01 GCDOK - Jul 1, 14:40 UTCJul 1, 15:00 UTC20m
2026-07-01 GCDOK - Jul 1, 13:00 UTCJul 1, 13:25 UTC25m
2026-07-01 GCDOK - Jul 1, 11:35 UTCJul 1, 12:05 UTC30m
2026-06-30 GCDOK - Jun 30, 10:55 UTCJun 30, 11:10 UTC15m
2026-06-30 GCDOK - Jun 30, 08:50 UTCJun 30, 09:15 UTC25m
2026-06-29 GCDOK - Jun 29, 16:19 UTCJun 29, 17:10 UTC50m
2026-06-28 GCDOK - Jun 28, 15:24 UTCJun 28, 15:55 UTC30m
2026-06-28 GCDOK - Jun 28, 14:19 UTCJun 28, 14:45 UTC25m
2026-06-28 GCDOK - Jun 28, 10:44 UTCJun 28, 11:29 UTC45m
2026-06-22 GCDOK - Jun 22, 14:59 UTCJun 22, 15:14 UTC15m
2026-06-22 GCDOK - Jun 22, 13:14 UTCJun 22, 13:29 UTC15m
2026-06-22 GCDOK - Jun 22, 08:04 UTCJun 22, 08:35 UTC30m
2026-06-21 GCDOK - Jun 21, 12:19 UTCJun 21, 12:55 UTC35m
2026-06-19 GCDOK - Jun 19, 16:39 UTCJun 19, 17:19 UTC40m
2026-06-19 GCDOK - Jun 19, 12:59 UTCJun 19, 14:15 UTC1h 15m
2026-06-19 GCDOK - Jun 19, 10:24 UTCJun 19, 10:50 UTC25m
2026-06-19 GCDOK - Jun 19, 08:24 UTCJun 19, 08:40 UTC15m
2026-06-18 GCDOK - Jun 18, 16:05 UTCJun 18, 16:50 UTC45m
2026-06-18 GCDOK - Jun 18, 14:35 UTCJun 18, 15:05 UTC30m
2026-06-15 GCDOK - Jun 15, 11:49 UTCJun 15, 12:25 UTC35m
2026-06-15 GCDOK - Jun 15, 09:54 UTCJun 15, 10:35 UTC40m
2026-06-14 GCDOK - Jun 14, 15:00 UTCJun 14, 15:50 UTC50m
2026-06-14 GCDOK - Jun 14, 12:40 UTCJun 14, 13:45 UTC1h 5m

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

Mode-S 40116C frequently asked

What is Mode-S code 40116C?
40116C is an ICAO 24-bit transponder address. Allocated to United Kingdom. Assigned to G-CDOK.
Where is Mode-S 40116C registered?
Mode-S code 40116C 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 40116C broadcasting right now?
No active broadcast right now. Last signal was 14h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 40116C, octal 20010554, decimal 4,198,764.
What flights does 40116C operate?
Mode-S 40116C has broadcast 1 distinct callsign, including GCDOK.