Apparatus

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sensors Mode-S transponder

40833C

ICAO 24-bit transponder address · allocated to United Kingdom

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

Hex
40833C
Octal
20101474
Decimal
4,227,900
Country
GB
Tail
G-XLRD
Type
A21N
Broadcasting now · callsign WUK3CM · 20,250 ft
Flights observed
312
Distinct callsigns
20
Country
GB
Last broadcast
6h ago

Current position

40833C is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address 40833C 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
WUK6587 - 32 2026-07-13
WUK2TN - 32 2026-07-13
WUK825 - 20 2026-07-12
WUK597 - 19 2026-07-12
WUK9836 - 16 2026-07-10
WUK441 - 16 2026-07-09
WUK9224 - 15 2026-07-10
WUK75 Wizz Air UK 15 2026-07-09
WUK7VJ - 13 2026-07-09
WUK6090 - 13 2026-07-09
WUK8PY - 11 2026-07-10
WUK312 - 11 2026-07-10
WUK6J - 10 2026-07-14
WUK7DB - 9 2026-07-14
WUK975 - 8 2026-07-13
WUK8YM - 8 2026-07-13
WUK5608 Wizz Air UK 8 2026-04-22
WUK7PY - 7 2026-07-11
WUK73 - 7 2026-07-11
WUK5607 Wizz Air UK 5 2026-04-18

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 WUK4508 LGW → FAO Jul 14, 13:35 UTCJul 14, 16:10 UTC2h 35m
2026-07-14 WUK6J - Jul 14, 09:25 UTCJul 14, 12:00 UTC2h 35m
2026-07-14 WUK7DB - Jul 14, 05:10 UTCJul 14, 07:25 UTC2h 15m
2026-07-13 WUK8YM - Jul 13, 22:35 UTCJul 14, 01:10 UTC2h 35m
2026-07-13 WUK975 - Jul 13, 19:10 UTCJul 13, 21:10 UTC2h 0m
2026-07-13 WUK6587 VLC → LGW Jul 13, 14:10 UTCJul 13, 16:40 UTC2h 30m
2026-07-13 WUK2TN LGW → VLC Jul 13, 10:50 UTCJul 13, 12:50 UTC2h 0m
2026-07-12 WUK597 AYT → LGW Jul 12, 19:45 UTCJul 12, 23:50 UTC4h 5m
2026-07-12 WUK825 LGW → AYT Jul 12, 14:55 UTCJul 12, 18:30 UTC3h 35m
2026-07-12 WUK6587 VLC → LGW Jul 12, 11:10 UTCJul 12, 12:55 UTC1h 45m
2026-07-12 WUK2TN LGW → VLC Jul 12, 07:35 UTCJul 12, 09:25 UTC1h 50m
2026-07-11 WUK7PY - Jul 11, 22:15 UTCJul 12, 02:05 UTC3h 50m
2026-07-11 WUK73 - Jul 11, 17:10 UTCJul 11, 20:40 UTC3h 30m
2026-07-11 WUK6587 VLC → LGW Jul 11, 12:55 UTCJul 11, 15:00 UTC2h 5m
2026-07-11 WUK2TN LGW → VLC Jul 11, 09:50 UTCJul 11, 11:45 UTC1h 55m
2026-07-10 WUK312 PRG → LGW Jul 10, 15:55 UTCJul 10, 17:55 UTC2h 0m
2026-07-10 WUK8PY LGW → PRG Jul 10, 13:15 UTCJul 10, 15:00 UTC1h 45m
2026-07-10 WUK9224 - Jul 10, 09:15 UTCJul 10, 11:25 UTC2h 10m
2026-07-10 WUK9836 - Jul 10, 06:05 UTCJul 10, 07:50 UTC1h 45m
2026-07-10 WUK9836 - Jul 10, 05:25 UTCJul 10, 06:00 UTC35m
2026-07-09 WUK75 LTN → LTN Jul 9, 19:55 UTCJul 9, 23:20 UTC3h 25m
2026-07-09 WUK441 - Jul 9, 16:05 UTCJul 9, 18:00 UTC1h 55m
2026-07-09 WUK441 - Jul 9, 15:00 UTCJul 9, 16:00 UTC1h 0m
2026-07-09 WUK6090 FAO → LGW Jul 9, 10:50 UTCJul 9, 13:10 UTC2h 20m
2026-07-09 WUK7VJ LGW → FAO Jul 9, 07:25 UTCJul 9, 09:50 UTC2h 25m
2026-07-08 WUK597 - Jul 8, 20:20 UTCJul 9, 00:25 UTC4h 5m
2026-07-08 WUK825 - Jul 8, 14:55 UTCJul 8, 18:30 UTC3h 35m
2026-07-08 WUK6587 - Jul 8, 11:05 UTCJul 8, 13:05 UTC2h 0m
2026-07-08 WUK2TN LGW → VLC Jul 8, 07:20 UTCJul 8, 09:10 UTC1h 50m
2026-07-07 WUK7PY - Jul 7, 21:10 UTCJul 8, 01:00 UTC3h 50m
2026-07-07 WUK73 - Jul 7, 16:05 UTCJul 7, 19:25 UTC3h 20m
2026-07-07 WUK6587 VLC → LGW Jul 7, 11:30 UTCJul 7, 13:30 UTC2h 0m
2026-07-07 WUK2TN - Jul 7, 07:55 UTCJul 7, 09:35 UTC1h 40m
2026-07-06 WUK8YM - Jul 6, 22:30 UTCJul 7, 00:55 UTC2h 25m
2026-07-06 WUK975 - Jul 6, 18:45 UTCJul 6, 20:55 UTC2h 10m
2026-07-06 WUK801 - Jul 6, 14:30 UTCJul 6, 15:00 UTC30m
2026-07-06 WUK7UP BEG → LTN Jul 6, 10:35 UTCJul 6, 13:10 UTC2h 35m
2026-07-06 WUK1GD - Jul 6, 07:15 UTCJul 6, 09:30 UTC2h 15m
2026-07-05 WUK7WJ - Jul 5, 19:45 UTCJul 6, 00:00 UTC4h 15m
2026-07-05 WUK77 - Jul 5, 14:40 UTCJul 5, 18:20 UTC3h 40m
2026-07-05 WUK7UP BEG → LTN Jul 5, 10:35 UTCJul 5, 13:15 UTC2h 40m
2026-07-05 WUK1GD - Jul 5, 07:00 UTCJul 5, 09:20 UTC2h 20m
2026-07-04 WUK801 - Jul 4, 18:50 UTCJul 4, 19:10 UTC20m
2026-07-04 WUK312 PRG → LGW Jul 4, 15:40 UTCJul 4, 17:30 UTC1h 50m
2026-07-04 WUK8PY LGW → PRG Jul 4, 13:05 UTCJul 4, 14:35 UTC1h 30m
2026-07-04 WUK6J - Jul 4, 09:20 UTCJul 4, 11:50 UTC2h 30m
2026-07-04 WUK7DB - Jul 4, 05:00 UTCJul 4, 07:05 UTC2h 5m
2026-07-03 WUK75 LTN → LTN Jul 3, 17:35 UTCJul 3, 21:00 UTC3h 25m
2026-07-03 WUK441 - Jul 3, 12:55 UTCJul 3, 15:55 UTC3h 0m
2026-07-03 WUK9UG - Jul 3, 09:00 UTCJul 3, 11:35 UTC2h 35m

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

Mode-S 40833C frequently asked

What is Mode-S code 40833C?
40833C is an ICAO 24-bit transponder address. Allocated to United Kingdom. Assigned to G-XLRD.
Where is Mode-S 40833C registered?
Mode-S code 40833C 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 40833C broadcasting right now?
Yes. Mode-S 40833C is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 40833C, octal 20101474, decimal 4,227,900.
What flights does 40833C operate?
Mode-S 40833C has broadcast 20 distinct callsigns, including WUK6587, WUK2TN, WUK825, WUK597, WUK9836.