Apparatus

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sensors Mode-S transponder

404F67

ICAO 24-bit transponder address · allocated to United Kingdom

Currently assigned to G-WYVN · Motorglider

Hex
404F67
Octal
20047547
Decimal
4,214,631
Country
GB
Tail
G-WYVN
Type
GLIM
No current signal · last broadcast 2d ago
Flights observed
35
Distinct callsigns
1
Country
GB
Last broadcast
2d ago

Last known position

Most recent position reported by Mode-S 404F67.

Country allocation

The ICAO 24-bit address 404F67 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
GWYVN - 35 2026-07-07

Recent flights last 35

DateFlightRouteTakeoffLandingDuration
2026-07-07 GWYVN UPV → UPV Jul 7, 14:25 UTCJul 7, 15:35 UTC1h 10m
2026-07-07 GWYVN - Jul 7, 10:30 UTCJul 7, 13:35 UTC3h 5m
2026-07-06 GWYVN - Jul 6, 16:00 UTCJul 6, 16:55 UTC55m
2026-07-06 GWYVN UPV → UPV Jul 6, 13:05 UTCJul 6, 14:30 UTC1h 25m
2026-07-06 GWYVN UPV → UPV Jul 6, 11:35 UTCJul 6, 12:10 UTC35m
2026-07-05 GWYVN UPV → UPV Jul 5, 13:35 UTCJul 5, 16:20 UTC2h 45m
2026-07-05 GWYVN UPV → UPV Jul 5, 12:15 UTCJul 5, 12:35 UTC20m
2026-07-05 GWYVN UPV → UPV Jul 5, 10:05 UTCJul 5, 11:20 UTC1h 15m
2026-07-04 GWYVN UPV → UPV Jul 4, 15:10 UTCJul 4, 15:25 UTC15m
2026-07-04 GWYVN UPV → UPV Jul 4, 12:45 UTCJul 4, 13:30 UTC45m
2026-07-04 GWYVN UPV → UPV Jul 4, 11:40 UTCJul 4, 12:10 UTC30m
2026-07-04 GWYVN UPV → UPV Jul 4, 10:30 UTCJul 4, 11:00 UTC30m
2026-07-02 GWYVN UPV → UPV Jul 2, 09:15 UTCJul 2, 15:15 UTC6h 0m
2026-07-01 GWYVN UPV → UPV Jul 1, 09:00 UTCJul 1, 15:20 UTC6h 20m
2026-06-30 GWYVN UPV → UPV Jun 30, 15:05 UTCJun 30, 15:15 UTC10m
2026-06-30 GWYVN UPV → UPV Jun 30, 08:20 UTCJun 30, 13:05 UTC4h 45m
2026-06-29 GWYVN UPV → UPV Jun 29, 11:50 UTCJun 29, 14:09 UTC2h 20m
2026-06-23 GWYVN UPV → UPV Jun 23, 12:25 UTCJun 23, 14:15 UTC1h 50m
2026-06-23 GWYVN UPV → UPV Jun 23, 10:24 UTCJun 23, 11:29 UTC1h 5m
2026-06-23 GWYVN UPV → UPV Jun 23, 08:35 UTCJun 23, 09:45 UTC1h 10m
2026-06-19 GWYVN UPV → UPV Jun 19, 12:34 UTCJun 19, 14:04 UTC1h 30m
2026-06-19 GWYVN UPV → UPV Jun 19, 09:49 UTCJun 19, 10:24 UTC35m
2026-06-18 GWYVN UPV → UPV Jun 18, 15:05 UTCJun 18, 15:25 UTC20m
2026-06-18 GWYVN UPV → UPV Jun 18, 13:15 UTCJun 18, 14:35 UTC1h 20m
2026-06-18 GWYVN UPV → UPV Jun 18, 12:10 UTCJun 18, 12:20 UTC10m
2026-06-16 GWYVN UPV → UPV Jun 16, 14:45 UTCJun 16, 15:15 UTC30m
2026-06-16 GWYVN UPV → UPV Jun 16, 11:25 UTCJun 16, 14:09 UTC2h 45m
2026-06-16 GWYVN UPV → UPV Jun 16, 10:00 UTCJun 16, 10:40 UTC40m
2026-05-30 GWYVN UPV → UPV May 30, 14:25 UTCMay 30, 16:35 UTC2h 10m
2026-05-30 GWYVN UPV → UPV May 30, 09:40 UTCMay 30, 13:55 UTC4h 15m
2026-05-25 GWYVN UPV → UPV May 25, 13:10 UTCMay 25, 15:25 UTC2h 15m
2026-05-25 GWYVN UPV → UPV May 25, 12:30 UTCMay 25, 12:40 UTC10m
2026-05-23 GWYVN UPV → UPV May 23, 14:05 UTCMay 23, 14:20 UTC15m
2026-05-23 GWYVN UPV → UPV May 23, 12:25 UTCMay 23, 13:20 UTC55m
2026-05-06 GWYVN UPV → UPV May 6, 08:20 UTCMay 6, 11:15 UTC2h 55m

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

Mode-S 404F67 frequently asked

What is Mode-S code 404F67?
404F67 is an ICAO 24-bit transponder address. Allocated to United Kingdom. Assigned to G-WYVN.
Where is Mode-S 404F67 registered?
Mode-S code 404F67 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 404F67 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 404F67, octal 20047547, decimal 4,214,631.
What flights does 404F67 operate?
Mode-S 404F67 has broadcast 1 distinct callsign, including GWYVN.