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
No current signal · last broadcast Jul 26, 19:25 UTC
Flights observed
612
Distinct callsigns
20
Country
GB
Last broadcast
Jul 26, 19:25 UTC

Last known position

Most recent position reported by Mode-S 4080C2.

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 13 2026-07-23
RUK2HK Ryanair UK 13 2026-07-23
RUK178 Ryanair UK 13 2026-07-19
RUK9XM - 12 2026-07-20
RUK4UK Ryanair UK 12 2026-07-26
RUK7QL - 11 2026-06-27
RUK3DN Ryanair UK 11 2026-07-26
RUK8HW - 9 2026-07-18
RUK4NE - 9 2026-07-18
RUK8JN - 8 2026-07-18
RUK85AN - 8 2026-06-29
RUK60KQ - 8 2026-06-26
RUK3FH Ryanair UK 8 2026-07-22
RUK31RP - 8 2026-07-16
RUK1XR Ryanair UK 8 2026-07-22
RUK9ZY - 7 2026-07-15
RUK9MH - 7 2026-07-15
RUK9GK Ryanair UK 7 2026-07-26
RUK879F - 7 2026-06-25
RUK7EX - 7 2026-07-07

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 RUK530X STN → SJJ Jul 26, 17:40 UTCJul 26, 19:25 UTC1h 45m
2026-07-26 RUK9GK TIA → STN Jul 26, 09:55 UTCJul 26, 16:20 UTC6h 25m
2026-07-26 RUK4UK GLA → STN Jul 26, 07:45 UTCJul 26, 08:40 UTC55m
2026-07-26 RUK3DN STN → GLA Jul 26, 05:55 UTCJul 26, 06:55 UTC1h 1m
2026-07-25 RUK57TQ RAK → STN Jul 25, 20:30 UTCJul 25, 23:35 UTC3h 5m
2026-07-25 RUK7872 STN → RAK Jul 25, 16:40 UTCJul 25, 19:20 UTC2h 40m
2026-07-25 RUK2GD ORK → STN Jul 25, 14:10 UTCJul 25, 15:10 UTC1h 0m
2026-07-25 RUK905 STN → ORK Jul 25, 12:30 UTCJul 25, 13:25 UTC55m
2026-07-25 RUK746Z - Jul 25, 08:45 UTCJul 25, 11:15 UTC2h 30m
2026-07-25 RUK715 - Jul 25, 05:30 UTCJul 25, 07:55 UTC2h 25m
2026-07-24 RUK5995 MAD → STN Jul 24, 20:50 UTCJul 24, 22:50 UTC2h 0m
2026-07-24 RUK5996 STN → MAD Jul 24, 17:40 UTCJul 24, 19:30 UTC1h 50m
2026-07-24 RUK91GH RAK → STN Jul 24, 13:25 UTCJul 24, 16:25 UTC3h 0m
2026-07-24 RUK46VM STN → RAK Jul 24, 09:10 UTCJul 24, 12:05 UTC2h 55m
2026-07-23 RUK2HK GLA → STN Jul 23, 18:05 UTCJul 23, 19:00 UTC55m
2026-07-23 RUK5AK STN → GLA Jul 23, 16:25 UTCJul 23, 17:15 UTC50m
2026-07-23 RUK8025 RMU → STN Jul 23, 12:50 UTCJul 23, 15:10 UTC2h 20m
2026-07-23 RUK8026 - Jul 23, 09:40 UTCJul 23, 11:45 UTC2h 5m
2026-07-23 RUK4UK GLA → STN Jul 23, 07:15 UTCJul 23, 08:10 UTC55m
2026-07-23 RUK3DN STN → GLA Jul 23, 05:25 UTCJul 23, 06:20 UTC55m
2026-07-22 RUK1XR TIA → STN Jul 22, 21:10 UTCJul 22, 23:50 UTC2h 40m
2026-07-22 RUK3FH STN → TIA Jul 22, 17:50 UTCJul 22, 19:55 UTC2h 5m
2026-07-22 RUK8554 IBZ → STN Jul 22, 14:15 UTCJul 22, 16:30 UTC2h 15m
2026-07-22 RUK8553 - Jul 22, 11:10 UTCJul 22, 13:10 UTC2h 0m
2026-07-21 RUK2HK GLA → STN Jul 21, 21:30 UTCJul 21, 22:35 UTC1h 5m
2026-07-21 RUK5AK STN → GLA Jul 21, 19:50 UTCJul 21, 20:45 UTC55m
2026-07-21 RUK37TA PMI → STN Jul 21, 16:40 UTCJul 21, 18:50 UTC2h 10m
2026-07-21 RUK029 STN → PMI Jul 21, 13:30 UTCJul 21, 15:25 UTC1h 55m
2026-07-21 RUK3YJ TNG → STN Jul 21, 09:45 UTCJul 21, 12:25 UTC2h 40m
2026-07-21 RUK6EC STN → TNG Jul 21, 06:05 UTCJul 21, 08:40 UTC2h 35m
2026-07-20 RUK2HK - Jul 20, 23:05 UTCJul 21, 00:00 UTC54m
2026-07-20 RUK5AK STN → GLA Jul 20, 21:30 UTCJul 20, 22:20 UTC50m
2026-07-20 RUK85XY OSL → STN Jul 20, 18:45 UTCJul 20, 20:20 UTC1h 35m
2026-07-20 RUK417H STN → OSL Jul 20, 16:00 UTCJul 20, 17:45 UTC1h 45m
2026-07-20 RUK9XM EDI → STN Jul 20, 13:40 UTCJul 20, 14:50 UTC1h 10m
2026-07-20 RUK9362 - Jul 20, 11:30 UTCJul 20, 12:50 UTC1h 20m
2026-07-20 RUK524C EDI → NQY Jul 20, 09:35 UTCJul 20, 10:35 UTC1h 0m
2026-07-20 RUK5DM STN → EDI Jul 20, 07:25 UTCJul 20, 08:30 UTC1h 5m
2026-07-20 RUK627N EDI → STN Jul 20, 05:15 UTCJul 20, 06:15 UTC1h 0m
2026-07-20 RUK56PM CPH → EDI Jul 20, 00:10 UTCJul 20, 00:20 UTC10m
2026-07-19 RUK56PM CPH → EDI Jul 19, 22:50 UTCJul 20, 00:05 UTC1h 15m
2026-07-19 RUK6924 EDI → CPH Jul 19, 20:25 UTCJul 19, 22:00 UTC1h 35m
2026-07-19 RUK178 BFS → EDI Jul 19, 18:55 UTCJul 19, 19:35 UTC40m
2026-07-19 RUK9594 PMI → BFS Jul 19, 15:30 UTCJul 19, 18:05 UTC2h 35m
2026-07-19 RUK9595 - Jul 19, 11:50 UTCJul 19, 14:35 UTC2h 45m
2026-07-19 RUK89LH BFS → PMI Jul 19, 08:40 UTCJul 19, 10:50 UTC2h 10m
2026-07-19 RUK9603 BFS → BGY Jul 19, 05:35 UTCJul 19, 07:35 UTC2h 0m
2026-07-18 RUK8AK - Jul 18, 19:40 UTCJul 18, 23:05 UTC3h 25m
2026-07-18 RUK571 - Jul 18, 14:25 UTCJul 18, 18:25 UTC4h 0m
2026-07-18 RUK8HW - Jul 18, 12:35 UTCJul 18, 13:30 UTC55m

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?
No active broadcast right now. Last signal was Jul 26, 19:25 UTC.
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, RUK178, RUK9XM, RUK4UK.