Apparatus

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sensors Mode-S transponder

407FC1

ICAO 24-bit transponder address · allocated to United Kingdom

Currently assigned to G-WUKW · AIRBUS A-321neo

Hex
407FC1
Octal
20077701
Decimal
4,227,009
Country
GB
Tail
G-WUKW
Type
A21N
Broadcasting now · callsign WUK9497 · 35,000 ft
Flights observed
421
Distinct callsigns
20
Country
GB
Last broadcast
6h ago

Current position

407FC1 is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address 407FC1 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 20 distinct

Callsign Airline Flights Last seen
WUK441 - 22 2026-05-21
WUK75 Wizz Air UK 21 2026-05-21
WUK9UG - 15 2026-05-20
WUK9836 - 15 2026-05-21
WUK9224 - 15 2026-05-21
WUK712 - 12 2026-05-20
WUK8380 - 9 2026-07-13
WUK7LU - 9 2026-07-08
WUK7596 - 9 2026-07-08
WUK2JE - 9 2026-07-13
WUK7VJ - 8 2026-05-17
WUK6090 - 8 2026-05-17
WUK8SV - 7 2026-07-08
WUK557 - 7 2026-07-08
WUK825 - 6 2026-05-01
WUK7402 - 6 2026-06-30
WUK597 Wizz Air UK 6 2026-05-01
WUK26NJ - 6 2026-07-01
WUK975 - 5 2026-05-22
WUK7DB Wizz Air UK 5 2026-05-05

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-13 WUK7383 - Jul 13, 22:30 UTCJul 14, 01:20 UTC2h 50m
2026-07-13 WUK9F - Jul 13, 18:45 UTCJul 13, 21:20 UTC2h 35m
2026-07-13 WUK2JE BCN → LTN Jul 13, 15:55 UTCJul 13, 17:40 UTC1h 45m
2026-07-13 WUK8380 - Jul 13, 12:30 UTCJul 13, 14:25 UTC1h 55m
2026-07-13 WUK1509 VLC → LTN Jul 13, 08:50 UTCJul 13, 11:15 UTC2h 25m
2026-07-13 WUK705 - Jul 13, 05:31 UTCJul 13, 07:40 UTC2h 10m
2026-07-12 WUK2MH RHO → LTN Jul 12, 19:25 UTCJul 12, 23:25 UTC4h 0m
2026-07-12 WUK143 LTN → RHO Jul 12, 14:35 UTCJul 12, 18:05 UTC3h 30m
2026-07-12 WUK47BD - Jul 12, 11:01 UTCJul 12, 12:50 UTC1h 50m
2026-07-12 WUK2DF LTN → MAD Jul 12, 07:25 UTCJul 12, 09:25 UTC2h 0m
2026-07-11 WUK45LH - Jul 11, 22:50 UTCJul 12, 00:45 UTC1h 55m
2026-07-11 WUK74YC - Jul 11, 18:45 UTCJul 11, 20:50 UTC2h 5m
2026-07-11 WUK2JE BCN → LTN Jul 11, 15:40 UTCJul 11, 17:30 UTC1h 50m
2026-07-11 WUK8380 - Jul 11, 12:05 UTCJul 11, 13:55 UTC1h 50m
2026-07-11 WUK7114 - Jul 11, 08:10 UTCJul 11, 10:20 UTC2h 10m
2026-07-11 WUK799 - Jul 11, 05:15 UTCJul 11, 07:10 UTC1h 55m
2026-07-10 WUK363 - Jul 10, 23:20 UTCJul 11, 02:05 UTC2h 45m
2026-07-10 WUK243 - Jul 10, 19:35 UTCJul 10, 21:50 UTC2h 15m
2026-07-10 WUK2JE BCN → LTN Jul 10, 16:05 UTCJul 10, 18:05 UTC2h 0m
2026-07-10 WUK8380 LTN → BCN Jul 10, 12:40 UTCJul 10, 14:35 UTC1h 55m
2026-07-10 WUK1509 - Jul 10, 09:05 UTCJul 10, 11:10 UTC2h 5m
2026-07-10 WUK705 - Jul 10, 05:45 UTCJul 10, 07:55 UTC2h 10m
2026-07-09 WUK8US SPU → LTN Jul 9, 20:45 UTCJul 9, 22:55 UTC2h 10m
2026-07-09 WUK548 - Jul 9, 17:40 UTCJul 9, 19:30 UTC1h 50m
2026-07-09 WUK65ZN TRN → LTN Jul 9, 15:05 UTCJul 9, 16:40 UTC1h 35m
2026-07-09 WUK8VG - Jul 9, 12:40 UTCJul 9, 14:10 UTC1h 30m
2026-07-09 WUK6HU SVQ → LTN Jul 9, 08:55 UTCJul 9, 11:20 UTC2h 25m
2026-07-09 WUK1PG - Jul 9, 05:20 UTCJul 9, 07:45 UTC2h 25m
2026-07-08 WUK557 - Jul 8, 23:50 UTCJul 9, 02:25 UTC2h 35m
2026-07-08 WUK8SV - Jul 8, 19:55 UTCJul 8, 22:05 UTC2h 10m
2026-07-08 WUK2JE BCN → LTN Jul 8, 16:35 UTCJul 8, 18:35 UTC2h 0m
2026-07-08 WUK8380 - Jul 8, 13:10 UTCJul 8, 15:10 UTC2h 0m
2026-07-08 WUK7596 - Jul 8, 09:15 UTCJul 8, 11:55 UTC2h 40m
2026-07-08 WUK7LU - Jul 8, 05:20 UTCJul 8, 07:15 UTC1h 55m
2026-07-07 WUK962 - Jul 7, 22:15 UTCJul 8, 01:05 UTC2h 50m
2026-07-07 WUK3WN - Jul 7, 18:45 UTCJul 7, 20:55 UTC2h 10m
2026-07-07 WUK735 PRG → LTN Jul 7, 15:55 UTCJul 7, 17:35 UTC1h 40m
2026-07-07 WUK74XF - Jul 7, 13:20 UTCJul 7, 14:45 UTC1h 25m
2026-07-07 WUK795 - Jul 7, 09:05 UTCJul 7, 12:10 UTC3h 5m
2026-07-07 WUK772 - Jul 7, 05:25 UTCJul 7, 07:50 UTC2h 25m
2026-07-06 WUK4DF - Jul 6, 19:20 UTCJul 6, 21:30 UTC2h 10m
2026-07-06 WUK328 - Jul 6, 16:10 UTCJul 6, 18:10 UTC2h 0m
2026-07-06 WUK759 - Jul 6, 11:25 UTCJul 6, 15:00 UTC3h 35m
2026-07-06 WUK2082 - Jul 6, 06:30 UTCJul 6, 09:45 UTC3h 15m
2026-07-05 WUK557 - Jul 5, 17:50 UTCJul 5, 20:35 UTC2h 45m
2026-07-05 WUK8SV - Jul 5, 14:05 UTCJul 5, 16:10 UTC2h 5m
2026-07-05 WUK7005 - Jul 5, 09:20 UTCJul 5, 11:55 UTC2h 35m
2026-07-05 WUK78 - Jul 5, 05:30 UTCJul 5, 07:30 UTC2h 0m
2026-07-04 WUK7WJ AYT → LTN Jul 4, 19:50 UTCJul 5, 00:00 UTC4h 10m
2026-07-04 WUK77 - Jul 4, 14:20 UTCJul 4, 18:15 UTC3h 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-WUKW page for operator, model, and routing details .

Mode-S 407FC1 frequently asked

What is Mode-S code 407FC1?
407FC1 is an ICAO 24-bit transponder address. Allocated to United Kingdom. Assigned to G-WUKW.
Where is Mode-S 407FC1 registered?
Mode-S code 407FC1 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 407FC1 broadcasting right now?
Yes. Mode-S 407FC1 is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 407FC1, octal 20077701, decimal 4,227,009.
What flights does 407FC1 operate?
Mode-S 407FC1 has broadcast 20 distinct callsigns, including WUK441, WUK75, WUK9UG, WUK9836, WUK9224.