Apparatus

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sensors Mode-S transponder

4CA809

ICAO 24-bit transponder address · allocated to Ireland

Currently assigned to EI-EKJ · BOEING 737-800

Hex
4CA809
Octal
23124011
Decimal
5,023,753
Country
IE
Tail
EI-EKJ
Type
B738
No current signal · last broadcast 1h ago
Flights observed
528
Distinct callsigns
20
Country
IE
Last broadcast
1h ago

Last known position

Most recent position reported by Mode-S 4CA809.

Country allocation

The ICAO 24-bit address 4CA809 falls within the block assigned to Ireland (IE) by ICAO Annex 10, Volume III. Every aircraft registered in Ireland 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
RYR7FU Ryanair 4 2026-06-05
RYR3UA Ryanair 4 2026-06-05
RYR8WT Ryanair 3 2026-05-24
RYR7NM - 3 2026-06-26
RYR6YJ Ryanair 3 2026-06-26
RYR6UP - 3 2026-07-15
RYR59VA - 3 2026-07-15
RYR5334 Ryanair 3 2026-06-26
RYR52UR - 3 2026-06-26
RYR3NJ Ryanair 3 2026-05-24
RYR209L Ryanair 3 2026-05-08
RYR9FR Ryanair 2 2026-05-14
RYR99LX Ryanair 2 2026-07-20
RYR93QA Ryanair 2 2026-06-03
RYR93KF Ryanair 2 2026-05-19
RYR9141 - 2 2026-07-08
RYR8UF Ryanair 2 2026-07-24
RYR885R Ryanair 2 2026-05-13
RYR8645 - 2 2026-06-05
RYR80UH Ryanair 2 2026-05-12

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-25 RYR4966 BRI → GRO Jul 25, 19:30 UTCJul 25, 21:20 UTC1h 50m
2026-07-25 RYR4967 KIR → STN Jul 25, 17:00 UTCJul 25, 18:30 UTC1h 30m
2026-07-25 RYR2449 PED → GRO Jul 25, 13:50 UTCJul 25, 16:00 UTC2h 10m
2026-07-25 RYR9KC STN → WMI Jul 25, 10:10 UTCJul 25, 12:00 UTC1h 50m
2026-07-25 RYR9173 WRO → GRO Jul 25, 07:10 UTCJul 25, 09:10 UTC2h 0m
2026-07-25 RYR5MB GRO → WRO Jul 25, 04:00 UTCJul 25, 06:00 UTC2h 0m
2026-07-24 RYR772P STN → GRO Jul 24, 19:15 UTCJul 24, 20:55 UTC1h 40m
2026-07-24 RYR65SL GRO → STN Jul 24, 16:30 UTCJul 24, 18:10 UTC1h 40m
2026-07-24 RYR79QE STN → GRO Jul 24, 14:00 UTCJul 24, 15:45 UTC1h 45m
2026-07-24 RYR7GR - Jul 24, 12:20 UTCJul 24, 13:00 UTC40m
2026-07-24 RYR7PC STN → EIN Jul 24, 10:50 UTCJul 24, 11:30 UTC40m
2026-07-24 RYR8UF CWL → AGP Jul 24, 08:10 UTCJul 24, 10:05 UTC1h 55m
2026-07-24 RYR6DB HEL → BGY Jul 24, 05:20 UTCJul 24, 06:50 UTC1h 30m
2026-07-23 RUK292 - Jul 23, 21:10 UTCJul 23, 22:00 UTC50m
2026-07-23 RUK291 - Jul 23, 19:05 UTCJul 23, 19:55 UTC50m
2026-07-23 RYR8AE WRO → LBA Jul 23, 16:45 UTCJul 23, 18:10 UTC1h 25m
2026-07-23 RYR9071 GDN → GOT Jul 23, 15:05 UTCJul 23, 15:55 UTC50m
2026-07-23 RYR7MX ORK → EMA Jul 23, 13:25 UTCJul 23, 14:15 UTC50m
2026-07-23 RYR866X - Jul 23, 08:45 UTCJul 23, 12:05 UTC3h 20m
2026-07-23 RYR17UC MAD → CRL Jul 23, 04:30 UTCJul 23, 07:25 UTC2h 55m
2026-07-22 RYR6095 - Jul 22, 21:55 UTCJul 22, 22:15 UTC20m
2026-07-22 RYR9SK STN → SVQ Jul 22, 19:55 UTCJul 22, 20:45 UTC50m
2026-07-22 RYR619Q BUD → GOT Jul 22, 17:25 UTCJul 22, 19:10 UTC1h 45m
2026-07-22 RYR8WU BRS → DUB Jul 22, 14:55 UTCJul 22, 16:35 UTC1h 40m
2026-07-22 RYR525H PRG → GOT Jul 22, 11:35 UTCJul 22, 12:55 UTC1h 20m
2026-07-22 RYR7397 GOT → PUY Jul 22, 03:55 UTCJul 22, 05:25 UTC1h 30m
2026-07-21 RYR8779 VIE → EDI Jul 21, 20:50 UTCJul 21, 23:35 UTC2h 45m
2026-07-21 RYR25SC - Jul 21, 16:10 UTCJul 21, 18:30 UTC2h 20m
2026-07-21 RYR88NK - Jul 21, 13:30 UTCJul 21, 15:00 UTC1h 30m
2026-07-21 RYR3089 - Jul 21, 10:55 UTCJul 21, 12:15 UTC1h 20m
2026-07-21 RYR30RG BNX → GOT Jul 21, 07:50 UTCJul 21, 09:50 UTC2h 0m
2026-07-21 RYR55XJ GOT → BNX Jul 21, 05:05 UTCJul 21, 06:50 UTC1h 45m
2026-07-20 RYR834F STN → GOT Jul 20, 22:30 UTCJul 21, 00:00 UTC1h 30m
2026-07-20 RYR76UD - Jul 20, 19:45 UTCJul 20, 21:35 UTC1h 50m
2026-07-20 RYR2ZX - Jul 20, 16:55 UTCJul 20, 18:50 UTC1h 55m
2026-07-20 RYR99LX NUE → STN Jul 20, 14:20 UTCJul 20, 15:40 UTC1h 20m
2026-07-20 RYR5652 - Jul 20, 10:15 UTCJul 20, 11:35 UTC1h 20m
2026-07-20 RYR80FX NUE → NAP Jul 20, 07:35 UTCJul 20, 08:55 UTC1h 20m
2026-07-20 RYR99XM ZAD → NUE Jul 20, 05:35 UTCJul 20, 06:40 UTC1h 5m
2026-07-20 RYR503U NUE → ZAD Jul 20, 03:55 UTCJul 20, 04:45 UTC50m
2026-07-19 RYR1B - Jul 19, 19:00 UTCJul 19, 21:40 UTC2h 40m
2026-07-19 RYR93FF - Jul 19, 15:20 UTCJul 19, 17:40 UTC2h 20m
2026-07-19 RYR2WY BUD → NUE Jul 19, 11:35 UTCJul 19, 12:45 UTC1h 10m
2026-07-19 RYR68AG NUE → BUD Jul 19, 09:35 UTCJul 19, 10:35 UTC1h 0m
2026-07-19 RYR871V SOF → NUE Jul 19, 06:45 UTCJul 19, 08:30 UTC1h 45m
2026-07-19 RYR33ZW RAK → BVA Jul 19, 04:10 UTCJul 19, 05:50 UTC1h 40m
2026-07-18 RYR9JF - Jul 18, 22:35 UTCJul 19, 00:35 UTC2h 0m
2026-07-18 RYR6VN - Jul 18, 17:10 UTCJul 18, 19:25 UTC2h 15m
2026-07-18 RYR14WN - Jul 18, 13:40 UTCJul 18, 15:50 UTC2h 10m
2026-07-18 RYR7YZ VLC → TFS Jul 18, 10:50 UTCJul 18, 12:45 UTC1h 55m

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 EI-EKJ page for operator, model, and routing details .

Mode-S 4CA809 frequently asked

What is Mode-S code 4CA809?
4CA809 is an ICAO 24-bit transponder address. Allocated to Ireland. Assigned to EI-EKJ.
Where is Mode-S 4CA809 registered?
Mode-S code 4CA809 is allocated to Ireland (IE). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 4CA809 broadcasting right now?
No active broadcast right now. Last signal was 1h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 4CA809, octal 23124011, decimal 5,023,753.
What flights does 4CA809 operate?
Mode-S 4CA809 has broadcast 20 distinct callsigns, including RYR7FU, RYR3UA, RYR8WT, RYR7NM, RYR6YJ.