Apparatus

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sensors Mode-S transponder

4CA801

ICAO 24-bit transponder address · allocated to Ireland

Currently assigned to EI-EKC · BOEING 737-800

Hex
4CA801
Octal
23124001
Decimal
5,023,745
Country
IE
Tail
EI-EKC
Type
B738
No current signal · last broadcast Jul 26, 22:15 UTC
Flights observed
622
Distinct callsigns
20
Country
IE
Last broadcast
Jul 26, 22:15 UTC

Last known position

Most recent position reported by Mode-S 4CA801.

Country allocation

The ICAO 24-bit address 4CA801 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
RYR70PH Ryanair 8 2026-05-05
RYR2NN Ryanair 8 2026-05-05
RYR78FG Ryanair 7 2026-05-05
RYR76YY Ryanair 7 2026-05-05
RYR95HJ Ryanair 6 2026-04-30
RYR7FU - 6 2026-07-18
RYR4K Ryanair 6 2026-04-30
RYR3UA - 6 2026-07-18
RYR20KL Ryanair 6 2026-05-02
RYR93QA - 5 2026-07-19
RYR76SW Ryanair 5 2026-04-29
RYR5ZZ Ryanair 5 2026-07-19
RYR33TU Ryanair 5 2026-05-21
RYR2GJ Ryanair 5 2026-05-05
RYR24ZZ Ryanair 5 2026-04-29
RYR15DT Ryanair 5 2026-05-21
RYR9MX Ryanair 4 2026-04-30
RYR93GN Ryanair 4 2026-04-30
RYR90TC Ryanair 4 2026-04-28
RYR82NW Ryanair 4 2026-05-05

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 RYR85BG IBZ → FCO Jul 26, 22:05 UTCJul 26, 22:15 UTC10m
2026-07-26 RYR64PC FCO → IBZ Jul 26, 19:35 UTCJul 26, 21:05 UTC1h 30m
2026-07-26 RYR32SC MRS → FCO Jul 26, 17:30 UTCJul 26, 18:20 UTC50m
2026-07-26 RYR945 EDI → TRN Jul 26, 15:25 UTCJul 26, 16:25 UTC1h 0m
2026-07-26 RYR6RX BGY → KRK Jul 26, 13:10 UTCJul 26, 14:05 UTC55m
2026-07-26 RYR56EF FCO → CTA Jul 26, 10:55 UTCJul 26, 11:45 UTC50m
2026-07-26 RYR7XY TIA → NRN Jul 26, 06:55 UTCJul 26, 09:20 UTC2h 25m
2026-07-26 RYR7XY TIA → NRN Jul 26, 06:25 UTCJul 26, 06:30 UTC5m
2026-07-25 RYR5564 GLA → DUB Jul 25, 20:55 UTCJul 25, 21:35 UTC40m
2026-07-25 RYR5565 BVA → STN Jul 25, 19:35 UTCJul 25, 20:10 UTC35m
2026-07-25 RYR45KP LGW → DUB Jul 25, 17:55 UTCJul 25, 18:45 UTC50m
2026-07-25 RYR61SV DUB → LGW Jul 25, 15:55 UTCJul 25, 16:50 UTC55m
2026-07-25 RYR84PU ATH → DUB Jul 25, 10:50 UTCJul 25, 14:45 UTC3h 55m
2026-07-25 RYR47FK DUB → ATH Jul 25, 05:45 UTCJul 25, 09:25 UTC3h 40m
2026-07-24 RYR39PD - Jul 24, 23:35 UTCJul 25, 00:15 UTC40m
2026-07-24 RYR673 BHX → DUB Jul 24, 22:05 UTCJul 24, 22:40 UTC35m
2026-07-24 RYR628R RMU → DUB Jul 24, 18:45 UTCJul 24, 21:10 UTC2h 25m
2026-07-24 RYR76RK DUB → RMU Jul 24, 15:25 UTCJul 24, 17:55 UTC2h 30m
2026-07-24 RYR6EK PRG → BRI Jul 24, 12:35 UTCJul 24, 13:20 UTC45m
2026-07-24 RYR65BP DUB → BHX Jul 24, 10:45 UTCJul 24, 11:25 UTC40m
2026-07-24 RYR47HU CGN → ACE Jul 24, 08:25 UTCJul 24, 09:40 UTC1h 15m
2026-07-24 RYR19WY DUB → AMS Jul 24, 06:15 UTCJul 24, 07:30 UTC1h 15m
2026-07-23 RYR2MN KRK → RHO Jul 23, 22:00 UTCJul 23, 23:45 UTC1h 45m
2026-07-23 RYR81YQ - Jul 23, 18:55 UTCJul 23, 20:50 UTC1h 55m
2026-07-23 RYR33ZB SUF → TRS Jul 23, 16:55 UTCJul 23, 18:00 UTC1h 5m
2026-07-23 RYR20AU DUB → AMS Jul 23, 14:45 UTCJul 23, 15:50 UTC1h 5m
2026-07-23 RYR5WW BNX → GOT Jul 23, 12:25 UTCJul 23, 13:30 UTC1h 5m
2026-07-23 RYR1LC DUB → AMS Jul 23, 10:10 UTCJul 23, 11:20 UTC1h 10m
2026-07-23 RYR50NB NTE → DUB Jul 23, 08:00 UTCJul 23, 09:15 UTC1h 15m
2026-07-23 RYR66DT DUB → NTE Jul 23, 05:55 UTCJul 23, 07:10 UTC1h 15m
2026-07-22 RYR1BY VNO → BVA Jul 22, 20:35 UTCJul 22, 22:45 UTC2h 10m
2026-07-22 RYR77EU - Jul 22, 17:20 UTCJul 22, 19:05 UTC1h 45m
2026-07-22 RYR79GF - Jul 22, 13:35 UTCJul 22, 16:05 UTC2h 30m
2026-07-22 RYR1DK - Jul 22, 11:10 UTCJul 22, 11:35 UTC25m
2026-07-21 RYR6SD - Jul 21, 18:35 UTCJul 21, 21:35 UTC3h 0m
2026-07-21 RYR4TE - Jul 21, 15:15 UTCJul 21, 17:45 UTC2h 30m
2026-07-21 RYR855D NQY → ALC Jul 21, 11:25 UTCJul 21, 13:30 UTC2h 5m
2026-07-21 RYR215F ALC → NQY Jul 21, 08:30 UTCJul 21, 10:30 UTC2h 0m
2026-07-21 RYR6566 PMI → ALC Jul 21, 06:15 UTCJul 21, 07:05 UTC50m
2026-07-21 RYR72VM ALC → PMI Jul 21, 04:25 UTCJul 21, 05:05 UTC40m
2026-07-21 RYR1KW SVQ → STN Jul 21, 00:20 UTCJul 21, 02:10 UTC1h 50m
2026-07-20 RYR9YF VLC → BGY Jul 20, 21:55 UTCJul 20, 23:20 UTC1h 25m
2026-07-20 RYR4XR - Jul 20, 18:35 UTCJul 20, 20:15 UTC1h 40m
2026-07-20 RYR97BL VLC → FCO Jul 20, 15:50 UTCJul 20, 17:20 UTC1h 30m
2026-07-20 RYR1848 - Jul 20, 12:40 UTCJul 20, 14:35 UTC1h 55m
2026-07-20 RYR1849 VLC → FMM Jul 20, 09:45 UTCJul 20, 11:35 UTC1h 50m
2026-07-20 RYR5035 VLC → RAK Jul 20, 04:15 UTCJul 20, 08:15 UTC4h 0m
2026-07-19 RYR52SU - Jul 19, 20:00 UTCJul 19, 21:55 UTC1h 55m
2026-07-19 RYR7NM TFS → TSF Jul 19, 17:10 UTCJul 19, 18:50 UTC1h 40m
2026-07-19 RYR52UR - Jul 19, 14:55 UTCJul 19, 16:15 UTC1h 20m

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

Mode-S 4CA801 frequently asked

What is Mode-S code 4CA801?
4CA801 is an ICAO 24-bit transponder address. Allocated to Ireland. Assigned to EI-EKC.
Where is Mode-S 4CA801 registered?
Mode-S code 4CA801 is allocated to Ireland (IE). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 4CA801 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 22:15 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 4CA801, octal 23124001, decimal 5,023,745.
What flights does 4CA801 operate?
Mode-S 4CA801 has broadcast 20 distinct callsigns, including RYR70PH, RYR2NN, RYR78FG, RYR76YY, RYR95HJ.