Apparatus

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sensors Mode-S transponder

4080C2

ICAO 24-bit transponder address · allocated to United Kingdom

Currently assigned to G-RUKN · BOEING 737-800

Hex
4080C2
Octal
20100302
Decimal
4,227,266
Country
GB
Tail
G-RUKN
Type
B738
Broadcasting now · callsign RUK9624 · 5,250 ft
Flights observed
537
Distinct callsigns
20
Country
GB
Last broadcast
28m ago

Current position

4080C2 is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address 4080C2 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
RUK178 - 12 2026-06-27
RUK9XM - 11 2026-06-27
RUK7QL - 11 2026-06-27
RUK5AK Ryanair UK 9 2026-05-22
RUK4UK - 9 2026-07-08
RUK2HK Ryanair UK 9 2026-05-22
RUK8HW - 8 2026-07-11
RUK85AN - 8 2026-06-29
RUK60KQ - 8 2026-06-26
RUK4NE - 8 2026-07-11
RUK3DN - 8 2026-07-08
RUK8JN - 7 2026-07-11
RUK879F - 7 2026-06-25
RUK7EX - 7 2026-07-07
RUK6EH - 7 2026-07-07
RUK45VZ - 7 2026-07-07
RUK3UE - 7 2026-07-14
RUK3GZ - 7 2026-07-14
RUK3FH - 7 2026-07-05
RUK31RP - 7 2026-06-06

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 RUK9624 - Jul 14, 12:55 UTCJul 14, 14:30 UTC1h 35m
2026-07-14 RUK819W - Jul 14, 09:55 UTCJul 14, 12:00 UTC2h 5m
2026-07-14 RUK3GZ - Jul 14, 08:00 UTCJul 14, 08:35 UTC35m
2026-07-14 RUK3UE - Jul 14, 06:40 UTCJul 14, 07:15 UTC35m
2026-07-13 RUK9425 MLA → BFS Jul 13, 20:10 UTCJul 13, 23:50 UTC3h 40m
2026-07-13 RUK9424 - Jul 13, 16:00 UTCJul 13, 19:15 UTC3h 15m
2026-07-13 RUK955K - Jul 13, 13:35 UTCJul 13, 14:15 UTC40m
2026-07-13 RUK9605 BHD → EMA Jul 13, 12:05 UTCJul 13, 12:50 UTC45m
2026-07-13 RUK9MH - Jul 13, 10:20 UTCJul 13, 11:10 UTC50m
2026-07-13 RUK9ZY - Jul 13, 08:30 UTCJul 13, 09:25 UTC55m
2026-07-13 RUK14MR EDI → BFS Jul 13, 07:15 UTCJul 13, 07:50 UTC35m
2026-07-13 RUK6UA BFS → EDI Jul 13, 05:31 UTCJul 13, 06:05 UTC35m
2026-07-12 RUK9624 - Jul 12, 20:15 UTCJul 12, 22:30 UTC2h 15m
2026-07-12 RUK819W - Jul 12, 09:20 UTCJul 12, 11:25 UTC2h 5m
2026-07-12 RUK3GZ MAN → BFS Jul 12, 07:55 UTCJul 12, 08:25 UTC30m
2026-07-12 RUK3UE - Jul 12, 06:30 UTCJul 12, 07:05 UTC35m
2026-07-11 RUK8AK - Jul 11, 20:20 UTCJul 11, 23:50 UTC3h 30m
2026-07-11 RUK571 - Jul 11, 15:00 UTCJul 11, 18:40 UTC3h 40m
2026-07-11 RUK8HW - Jul 11, 13:10 UTCJul 11, 14:05 UTC55m
2026-07-11 RUK4NE - Jul 11, 09:25 UTCJul 11, 12:00 UTC2h 35m
2026-07-11 RUK8JN - Jul 11, 05:45 UTCJul 11, 08:05 UTC2h 20m
2026-07-10 RUK5995 - Jul 10, 21:10 UTCJul 10, 23:00 UTC1h 50m
2026-07-10 RUK5996 STN → MAD Jul 10, 17:45 UTCJul 10, 19:40 UTC1h 55m
2026-07-10 RUK46VM - Jul 10, 09:10 UTCJul 10, 16:20 UTC7h 10m
2026-07-09 RUK84EH - Jul 9, 20:05 UTCJul 9, 21:00 UTC55m
2026-07-09 RUK69PG - Jul 9, 18:20 UTCJul 9, 19:15 UTC55m
2026-07-09 RUK8317 MXP → STN Jul 9, 15:55 UTCJul 9, 17:30 UTC1h 35m
2026-07-09 RUK8318 STN → MXP Jul 9, 13:15 UTCJul 9, 14:40 UTC1h 25m
2026-07-09 RUK54DE - Jul 9, 09:25 UTCJul 9, 12:10 UTC2h 45m
2026-07-09 RUK80AJ - Jul 9, 05:45 UTCJul 9, 08:25 UTC2h 40m
2026-07-08 RUK10FT - Jul 8, 16:05 UTCJul 8, 23:30 UTC7h 25m
2026-07-08 RUK4UK - Jul 8, 11:05 UTCJul 8, 12:00 UTC55m
2026-07-08 RUK3DN - Jul 8, 09:00 UTCJul 8, 09:55 UTC55m
2026-07-08 RUK41AV - Jul 8, 07:00 UTCJul 8, 08:10 UTC1h 10m
2026-07-08 RUK2479 - Jul 8, 05:15 UTCJul 8, 06:15 UTC1h 0m
2026-07-07 RUK95CA MRS → STN Jul 7, 22:45 UTCJul 8, 00:15 UTC1h 30m
2026-07-07 RUK6541 - Jul 7, 20:05 UTCJul 7, 21:45 UTC1h 40m
2026-07-07 RUK6EH - Jul 7, 17:35 UTCJul 7, 19:05 UTC1h 30m
2026-07-07 RUK1EF - Jul 7, 15:10 UTCJul 7, 16:40 UTC1h 30m
2026-07-07 RUK45VZ EDI → STN Jul 7, 13:20 UTCJul 7, 14:10 UTC50m
2026-07-07 RUK7EX - Jul 7, 11:05 UTCJul 7, 12:05 UTC1h 0m
2026-07-07 RUK2613 - Jul 7, 08:40 UTCJul 7, 10:05 UTC1h 25m
2026-07-07 RUK27GK - Jul 7, 06:20 UTCJul 7, 07:35 UTC1h 15m
2026-07-06 RUK908 ORK → STN Jul 6, 22:40 UTCJul 6, 23:35 UTC55m
2026-07-06 RUK907 - Jul 6, 20:50 UTCJul 6, 21:50 UTC1h 0m
2026-07-06 RUK3YJ - Jul 6, 17:05 UTCJul 6, 19:40 UTC2h 35m
2026-07-06 RUK6EC - Jul 6, 13:30 UTCJul 6, 16:00 UTC2h 30m
2026-07-06 RUK24LQ - Jul 6, 09:40 UTCJul 6, 11:55 UTC2h 15m
2026-07-06 RUK530X - Jul 6, 06:10 UTCJul 6, 08:05 UTC1h 55m
2026-07-05 RUK1XR - Jul 5, 18:25 UTCJul 5, 21:00 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-RUKN page for operator, model, and routing details .

Mode-S 4080C2 frequently asked

What is Mode-S code 4080C2?
4080C2 is an ICAO 24-bit transponder address. Allocated to United Kingdom. Assigned to G-RUKN.
Where is Mode-S 4080C2 registered?
Mode-S code 4080C2 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 4080C2 broadcasting right now?
Yes. Mode-S 4080C2 is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 4080C2, octal 20100302, decimal 4,227,266.
What flights does 4080C2 operate?
Mode-S 4080C2 has broadcast 20 distinct callsigns, including RUK178, RUK9XM, RUK7QL, RUK5AK, RUK4UK.