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 WUK9CP · 34,000 ft
Flights observed
473
Distinct callsigns
20
Country
GB
Last broadcast
Jul 26, 20:35 UTC

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
WUK8SV - 8 2026-07-16
WUK7VJ - 8 2026-05-17
WUK6090 - 8 2026-05-17
WUK557 - 8 2026-07-16
WUK825 - 6 2026-05-01
WUK759 - 6 2026-07-17
WUK7402 - 6 2026-06-30
WUK597 Wizz Air UK 6 2026-05-01
WUK26NJ - 6 2026-07-01
WUK2082 - 6 2026-07-17

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 WUK784 TIA → LTN Jul 26, 18:30 UTCJul 26, 20:35 UTC2h 5m
2026-07-26 WUK369 LTN → TGM Jul 26, 14:00 UTCJul 26, 16:00 UTC2h 0m
2026-07-26 WUK76YB BCN → LTN Jul 26, 08:15 UTCJul 26, 10:10 UTC1h 55m
2026-07-26 WUK6DL - Jul 26, 04:55 UTCJul 26, 06:35 UTC1h 41m
2026-07-25 WUK2WV - Jul 25, 20:55 UTCJul 25, 23:20 UTC2h 25m
2026-07-25 WUK9GF LTN → SUJ Jul 25, 17:25 UTCJul 25, 19:35 UTC2h 10m
2026-07-24 WUK962 - Jul 24, 18:25 UTCJul 25, 00:45 UTC6h 20m
2026-07-24 WUK735 BEG → BEG Jul 24, 15:35 UTCJul 24, 17:10 UTC1h 35m
2026-07-24 WUK74XF LTN → PRG Jul 24, 12:55 UTCJul 24, 14:25 UTC1h 30m
2026-07-24 WUK1356 - Jul 24, 09:50 UTCJul 24, 11:45 UTC1h 55m
2026-07-24 WUK7BU LTN → POZ Jul 24, 07:20 UTCJul 24, 09:00 UTC1h 40m
2026-07-23 WUK6ZD JMK → LTN Jul 23, 22:40 UTCJul 24, 02:25 UTC3h 45m
2026-07-23 WUK9768 - Jul 23, 15:15 UTCJul 23, 18:25 UTC3h 10m
2026-07-23 WUK1356 - Jul 23, 10:00 UTCJul 23, 11:45 UTC1h 45m
2026-07-23 WUK7BU - Jul 23, 07:35 UTCJul 23, 09:15 UTC1h 40m
2026-07-22 WUK7383 - Jul 22, 23:05 UTCJul 23, 01:55 UTC2h 50m
2026-07-22 WUK9F - Jul 22, 19:30 UTCJul 22, 21:55 UTC2h 25m
2026-07-22 WUK3H - Jul 22, 15:15 UTCJul 22, 18:15 UTC3h 0m
2026-07-22 WUK7GL - Jul 22, 12:00 UTCJul 22, 14:25 UTC2h 25m
2026-07-22 WUK6DL - Jul 22, 04:50 UTCJul 22, 05:25 UTC35m
2026-07-21 WUK6ZD JMK → LTN Jul 21, 19:00 UTCJul 21, 22:40 UTC3h 40m
2026-07-21 WUK9768 - Jul 21, 14:30 UTCJul 21, 17:40 UTC3h 10m
2026-07-21 WUK7JA - Jul 21, 10:20 UTCJul 21, 13:00 UTC2h 40m
2026-07-21 WUK744 - Jul 21, 06:15 UTCJul 21, 08:40 UTC2h 25m
2026-07-20 WUK9CP BOJ → LTN Jul 20, 18:50 UTCJul 20, 22:05 UTC3h 15m
2026-07-20 WUK8ED - Jul 20, 14:05 UTCJul 20, 16:50 UTC2h 45m
2026-07-20 WUK704 - Jul 20, 09:30 UTCJul 20, 12:30 UTC3h 0m
2026-07-20 WUK525 - Jul 20, 05:40 UTCJul 20, 08:10 UTC2h 30m
2026-07-19 WUK2MH - Jul 19, 20:15 UTCJul 20, 00:30 UTC4h 15m
2026-07-19 WUK143 - Jul 19, 15:30 UTCJul 19, 19:05 UTC3h 35m
2026-07-19 WUK7005 - Jul 19, 09:05 UTCJul 19, 11:35 UTC2h 30m
2026-07-19 WUK78 PRG → LTN Jul 19, 05:30 UTCJul 19, 07:40 UTC2h 10m
2026-07-18 WUK7WJ - Jul 18, 20:30 UTCJul 19, 00:40 UTC4h 10m
2026-07-18 WUK77 - Jul 18, 14:35 UTCJul 18, 18:25 UTC3h 50m
2026-07-18 WUK2BY - Jul 18, 09:50 UTCJul 18, 12:20 UTC2h 30m
2026-07-18 WUK4ZE - Jul 18, 06:35 UTCJul 18, 08:35 UTC2h 0m
2026-07-17 WUK8US SPU → LTN Jul 17, 21:05 UTCJul 17, 23:14 UTC2h 10m
2026-07-17 WUK548 - Jul 17, 17:35 UTCJul 17, 19:30 UTC1h 55m
2026-07-17 WUK759 - Jul 17, 12:10 UTCJul 17, 15:44 UTC3h 35m
2026-07-17 WUK2082 - Jul 17, 07:14 UTCJul 17, 10:20 UTC3h 5m
2026-07-16 WUK557 - Jul 16, 18:59 UTCJul 16, 21:40 UTC2h 40m
2026-07-16 WUK8SV - Jul 16, 14:00 UTCJul 16, 16:25 UTC2h 25m
2026-07-16 WUK795 - Jul 16, 09:20 UTCJul 16, 12:14 UTC2h 55m
2026-07-16 WUK772 - Jul 16, 05:40 UTCJul 16, 08:15 UTC2h 35m
2026-07-15 WUK2MH RHO → LTN Jul 15, 20:55 UTCJul 16, 00:50 UTC3h 55m
2026-07-15 WUK143 LTN → RHO Jul 15, 16:00 UTCJul 15, 19:25 UTC3h 25m
2026-07-15 WUK47BD - Jul 15, 11:10 UTCJul 15, 13:30 UTC2h 20m
2026-07-15 WUK2DF - Jul 15, 07:45 UTCJul 15, 09:45 UTC2h 0m
2026-07-14 WUK8QH - Jul 14, 23:20 UTCJul 15, 02:10 UTC2h 50m
2026-07-14 WUK13GW - Jul 14, 19:50 UTCJul 14, 21:55 UTC2h 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-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.