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 RUK3UE · 21,900 ft
Flights observed
278
Distinct callsigns
20
Country
GB
Last broadcast
1h 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
RUK5AK Ryanair UK 9 2026-05-22
RUK2HK Ryanair UK 9 2026-05-22
RUK85AN Ryanair UK 6 2026-05-22
RUK4UK Ryanair UK 6 2026-05-01
RUK4NE Ryanair UK 6 2026-05-23
RUK3DN Ryanair UK 6 2026-05-01
RUK9NE Ryanair UK 5 2026-05-22
RUK8JN Ryanair UK 5 2026-05-23
RUK9GK Ryanair UK 4 2026-05-08
RUK90RG Ryanair UK 4 2026-04-26
RUK8HW - 4 2026-05-28
RUK86PR Ryanair UK 4 2026-05-08
RUK3FH Ryanair UK 4 2026-05-07
RUK31RP - 4 2026-05-28
RUK1XR Ryanair UK 4 2026-05-07
RUK19RU Ryanair UK 4 2026-05-08
RUK10FT Ryanair UK 4 2026-05-01
RUK9ZY Ryanair UK 3 2026-05-29
RUK9MH Ryanair UK 3 2026-05-29
RUK99FV Ryanair UK 3 2026-05-20

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-05-30 RUK14MR EDI → BFS May 30, 07:45 UTCMay 30, 08:15 UTC30m
2026-05-30 RUK6UA GDN → BFS May 30, 06:00 UTCMay 30, 06:40 UTC40m
2026-05-29 RUK69PG STN → BFS May 29, 20:50 UTCMay 29, 21:45 UTC55m
2026-05-29 RUK84EH BFS → STN May 29, 19:10 UTCMay 29, 20:05 UTC55m
2026-05-29 RUK3GZ MAN → BFS May 29, 17:40 UTCMay 29, 18:15 UTC35m
2026-05-29 RUK3UE BFS → MAN May 29, 16:15 UTCMay 29, 16:50 UTC35m
2026-05-29 RUK96WL BVA → BFS May 29, 12:35 UTCMay 29, 13:50 UTC1h 15m
2026-05-29 RUK9609 BFS → BVA May 29, 10:35 UTCMay 29, 11:40 UTC1h 5m
2026-05-29 RUK9MH STN → BFS May 29, 08:20 UTCMay 29, 09:15 UTC55m
2026-05-29 RUK9ZY BFS → STN May 29, 06:35 UTCMay 29, 07:30 UTC55m
2026-05-28 RUK9624 GRO → BFS May 28, 20:35 UTCMay 28, 22:45 UTC2h 10m
2026-05-28 RUK819W BFS → GRO May 28, 17:30 UTCMay 28, 19:35 UTC2h 5m
2026-05-28 RUK8HW - May 28, 15:45 UTCMay 28, 16:35 UTC50m
2026-05-28 RUK31RP - May 28, 14:00 UTCMay 28, 14:50 UTC50m
2026-05-28 RUK9YT AGP → BFS May 28, 10:10 UTCMay 28, 12:45 UTC2h 35m
2026-05-28 RUK9SQ BFS → AGP May 28, 05:50 UTCMay 28, 08:30 UTC2h 40m
2026-05-27 RUK8HW - May 27, 21:25 UTCMay 27, 22:25 UTC1h 0m
2026-05-27 RUK31RP BHD → STN May 27, 19:40 UTCMay 27, 20:35 UTC55m
2026-05-27 RUK9451 EDI → BFS May 27, 18:10 UTCMay 27, 18:45 UTC35m
2026-05-27 RUK45PL BFS → EDI May 27, 16:40 UTCMay 27, 17:10 UTC30m
2026-05-27 RUK8AK - May 27, 11:50 UTCMay 27, 15:30 UTC3h 40m
2026-05-27 RUK571 BFS → ACE May 27, 06:49 UTCMay 27, 10:20 UTC3h 30m
2026-05-26 RUK8HW - May 26, 21:20 UTCMay 26, 22:15 UTC55m
2026-05-26 RUK31RP - May 26, 19:34 UTCMay 26, 20:29 UTC55m
2026-05-26 RUK96VY ALC → BFS May 26, 16:00 UTCMay 26, 18:30 UTC2h 30m
2026-05-26 RUK29JH BFS → ALC May 26, 12:24 UTCMay 26, 14:55 UTC2h 30m
2026-05-26 RUK9MH STN → BFS May 26, 09:55 UTCMay 26, 10:44 UTC50m
2026-05-26 RUK9ZY BFS → STN May 26, 07:55 UTCMay 26, 08:45 UTC50m
2026-05-26 RUK14MR EDI → BFS May 26, 06:29 UTCMay 26, 06:59 UTC30m
2026-05-26 RUK6UA GDN → BFS May 26, 05:05 UTCMay 26, 05:30 UTC25m
2026-05-25 RUK8HW - May 25, 19:44 UTCMay 25, 20:34 UTC50m
2026-05-25 RUK31RP - May 25, 18:00 UTCMay 25, 18:50 UTC50m
2026-05-25 RUK96WL BVA → BFS May 25, 15:50 UTCMay 25, 17:05 UTC1h 15m
2026-05-25 RUK9609 BFS → BVA May 25, 13:45 UTCMay 25, 14:55 UTC1h 10m
2026-05-25 RUK6807 KRK → BFS May 25, 08:15 UTCMay 25, 10:40 UTC2h 25m
2026-05-25 RUK7NA BFS → KRK May 25, 05:00 UTCMay 25, 07:20 UTC2h 20m
2026-05-24 RUK9MH STN → BFS May 24, 20:30 UTCMay 24, 21:20 UTC50m
2026-05-24 RUK9ZY BFS → STN May 24, 18:50 UTCMay 24, 19:45 UTC55m
2026-05-24 RUK9594 PMI → BFS May 24, 15:35 UTCMay 24, 18:05 UTC2h 30m
2026-05-24 RUK9595 BFS → PMI May 24, 12:00 UTCMay 24, 14:30 UTC2h 30m
2026-05-24 RUK89LH BFS → PMI May 24, 08:30 UTCMay 24, 10:35 UTC2h 5m
2026-05-24 RUK9603 BFS → BGY May 24, 05:35 UTCMay 24, 07:40 UTC2h 5m
2026-05-24 EXS96NX KGS → MAN May 24, 02:00 UTCMay 24, 02:10 UTC10m
2026-05-23 RUK69PG STN → BFS May 23, 21:40 UTCMay 23, 22:40 UTC1h 0m
2026-05-23 RUK91GH RAK → STN May 23, 12:50 UTCMay 23, 19:50 UTC7h 0m
2026-05-23 RUK4NE TIA → STN May 23, 09:00 UTCMay 23, 11:35 UTC2h 35m
2026-05-23 RUK8JN STN → TIA May 23, 05:20 UTCMay 23, 07:45 UTC2h 25m
2026-05-22 RUK2HK GLA → STN May 22, 20:15 UTCMay 22, 21:10 UTC55m
2026-05-22 RUK5AK STN → GLA May 22, 18:25 UTCMay 22, 19:20 UTC55m
2026-05-22 RUK85AN NQY → STN May 22, 16:35 UTCMay 22, 17:35 UTC1h 0m

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 RUK5AK, RUK2HK, RUK85AN, RUK4UK, RUK4NE.