Apparatus

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sensors Mode-S transponder

407DD8

ICAO 24-bit transponder address · allocated to United Kingdom

Currently assigned to G-KFCN · BEST OFF Nynja

Hex
407DD8
Octal
20076730
Decimal
4,226,520
Country
GB
Tail
G-KFCN
Type
NNJA
No current signal · last broadcast 5h ago
Flights observed
155
Distinct callsigns
1
Country
GB
Last broadcast
5h ago

Last known position

Most recent position reported by Mode-S 407DD8.

Country allocation

The ICAO 24-bit address 407DD8 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
GKFCN - 155 2026-07-18

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-18 GKFCN GBA → GBA Jul 18, 16:25 UTCJul 18, 17:20 UTC55m
2026-07-18 GKFCN GBA → GBA Jul 18, 09:40 UTCJul 18, 11:00 UTC1h 20m
2026-07-17 GKFCN GBA → GBA Jul 17, 17:30 UTCJul 17, 18:15 UTC45m
2026-07-17 GKFCN GBA → GBA Jul 17, 13:45 UTCJul 17, 15:00 UTC1h 15m
2026-07-17 GKFCN GBA → GBA Jul 17, 10:40 UTCJul 17, 11:39 UTC1h 0m
2026-07-17 GKFCN GBA → GBA Jul 17, 08:35 UTCJul 17, 09:30 UTC55m
2026-07-16 GKFCN - Jul 16, 17:25 UTCJul 16, 18:10 UTC45m
2026-07-16 GKFCN - Jul 16, 15:19 UTCJul 16, 16:19 UTC1h 0m
2026-07-16 GKFCN - Jul 16, 13:25 UTCJul 16, 14:15 UTC50m
2026-07-16 GKFCN GBA → GBA Jul 16, 11:45 UTCJul 16, 12:30 UTC45m
2026-07-15 GKFCN GBA → GBA Jul 15, 17:55 UTCJul 15, 18:40 UTC45m
2026-07-15 GKFCN - Jul 15, 16:00 UTCJul 15, 16:45 UTC45m
2026-07-15 GKFCN - Jul 15, 14:05 UTCJul 15, 14:45 UTC40m
2026-07-15 GKFCN - Jul 15, 10:10 UTCJul 15, 11:05 UTC55m
2026-07-14 GKFCN - Jul 14, 10:20 UTCJul 14, 12:10 UTC1h 50m
2026-07-12 GKFCN GBA → GBA Jul 12, 08:25 UTCJul 12, 09:05 UTC40m
2026-07-11 GKFCN - Jul 11, 18:45 UTCJul 11, 19:40 UTC55m
2026-07-11 GKFCN GBA → GBA Jul 11, 16:50 UTCJul 11, 17:35 UTC45m
2026-07-11 GKFCN - Jul 11, 09:15 UTCJul 11, 10:20 UTC1h 5m
2026-07-10 GKFCN - Jul 10, 17:10 UTCJul 10, 17:40 UTC30m
2026-07-10 GKFCN - Jul 10, 16:05 UTCJul 10, 16:35 UTC30m
2026-07-10 GKFCN - Jul 10, 13:15 UTCJul 10, 14:00 UTC45m
2026-07-10 GKFCN - Jul 10, 11:00 UTCJul 10, 11:30 UTC30m
2026-07-10 GKFCN - Jul 10, 09:25 UTCJul 10, 10:10 UTC45m
2026-07-09 GKFCN GBA → GBA Jul 9, 17:25 UTCJul 9, 17:45 UTC20m
2026-07-09 GKFCN - Jul 9, 15:50 UTCJul 9, 16:15 UTC25m
2026-07-09 GKFCN - Jul 9, 10:55 UTCJul 9, 11:40 UTC45m
2026-07-09 GKFCN - Jul 9, 09:15 UTCJul 9, 10:10 UTC55m
2026-07-08 GKFCN GBA → GBA Jul 8, 17:50 UTCJul 8, 18:35 UTC45m
2026-07-08 GKFCN GBA → GBA Jul 8, 09:20 UTCJul 8, 09:45 UTC25m
2026-07-07 GKFCN GBA → GBA Jul 7, 15:30 UTCJul 7, 16:15 UTC45m
2026-07-07 GKFCN GBA → GBA Jul 7, 13:05 UTCJul 7, 14:00 UTC55m
2026-07-07 GKFCN GBA → GBA Jul 7, 10:35 UTCJul 7, 11:35 UTC1h 0m
2026-07-07 GKFCN GBA → GBA Jul 7, 08:45 UTCJul 7, 09:35 UTC50m
2026-07-06 GKFCN GBA → GBA Jul 6, 16:50 UTCJul 6, 17:45 UTC55m
2026-07-06 GKFCN GBA → GBA Jul 6, 15:05 UTCJul 6, 15:45 UTC40m
2026-07-06 GKFCN GBA → GBA Jul 6, 09:20 UTCJul 6, 10:05 UTC45m
2026-07-05 GKFCN GBA → GBA Jul 5, 18:15 UTCJul 5, 19:15 UTC1h 0m
2026-07-04 GKFCN GBA → GBA Jul 4, 18:30 UTCJul 4, 19:40 UTC1h 10m
2026-07-03 GKFCN - Jul 3, 15:55 UTCJul 3, 16:20 UTC25m
2026-07-03 GKFCN - Jul 3, 13:50 UTCJul 3, 14:40 UTC50m
2026-07-03 GKFCN - Jul 3, 12:15 UTCJul 3, 12:45 UTC30m
2026-07-03 GKFCN GBA → GBA Jul 3, 10:25 UTCJul 3, 11:20 UTC55m
2026-07-02 GKFCN GBA → GBA Jul 2, 14:40 UTCJul 2, 15:35 UTC55m
2026-07-02 GKFCN - Jul 2, 12:25 UTCJul 2, 13:15 UTC50m
2026-07-01 GKFCN GBA → GBA Jul 1, 14:55 UTCJul 1, 15:25 UTC30m
2026-07-01 GKFCN GBA → GBA Jul 1, 10:40 UTCJul 1, 11:40 UTC1h 0m
2026-06-30 GKFCN GBA → GBA Jun 30, 10:45 UTCJun 30, 11:10 UTC25m
2026-06-29 GKFCN - Jun 29, 19:05 UTCJun 29, 19:54 UTC50m
2026-06-29 GKFCN - Jun 29, 12:24 UTCJun 29, 13:09 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-KFCN page for operator, model, and routing details .

Mode-S 407DD8 frequently asked

What is Mode-S code 407DD8?
407DD8 is an ICAO 24-bit transponder address. Allocated to United Kingdom. Assigned to G-KFCN.
Where is Mode-S 407DD8 registered?
Mode-S code 407DD8 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 407DD8 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 407DD8, octal 20076730, decimal 4,226,520.
What flights does 407DD8 operate?
Mode-S 407DD8 has broadcast 1 distinct callsign, including GKFCN.