Apparatus

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sensors Mode-S transponder

4CA816

ICAO 24-bit transponder address · allocated to Ireland

Currently assigned to EI-EKX · BOEING 737-800

Hex
4CA816
Octal
23124026
Decimal
5,023,766
Country
IE
Tail
EI-EKX
Type
B738
No current signal · last broadcast 3h ago
Flights observed
145
Distinct callsigns
20
Country
IE
Last broadcast
3h ago

Last known position

Most recent position reported by Mode-S 4CA816.

Country allocation

The ICAO 24-bit address 4CA816 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
RYR97ZH Ryanair 3 2026-05-18
RYR533D Ryanair 3 2026-05-18
RYR89DJ Ryanair 2 2026-05-16
RYR7VV Ryanair 2 2026-05-16
RYR771U Ryanair 2 2026-05-13
RYR70XA Ryanair 2 2026-05-26
RYR70ST Ryanair 2 2026-04-13
RYR6EK Ryanair 2 2026-05-10
RYR6BK Ryanair 2 2026-05-20
RYR6AV Ryanair 2 2026-05-19
RYR65BP Ryanair 2 2026-05-10
RYR3H Ryanair 2 2026-05-17
RYR36AQ Ryanair 2 2026-05-26
RYR3054 Ryanair 2 2026-05-18
RYR3053 Ryanair 2 2026-05-18
RYR26UL Ryanair 2 2026-05-17
RYR2675 Ryanair 2 2026-05-19
RYR211Y Ryanair 2 2026-05-20
RYR156P Ryanair 2 2026-05-19
RYR9XB Ryanair 1 2026-05-07

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-05-29 RYR7SF KGS → DUB May 29, 20:35 UTCMay 30, 00:50 UTC4h 15m
2026-05-29 RYR65HX DUB → KGS May 29, 15:40 UTCMay 29, 19:35 UTC3h 55m
2026-05-29 RYR1FT OTP → DUB May 29, 13:05 UTCMay 29, 14:00 UTC55m
2026-05-29 RYR146G BCN → BLQ May 29, 11:45 UTCMay 29, 12:20 UTC35m
2026-05-29 RYR31MX REU → DUB May 29, 08:20 UTCMay 29, 10:40 UTC2h 20m
2026-05-29 RYR59PZ DUB → REU May 29, 04:45 UTCMay 29, 06:40 UTC1h 55m
2026-05-28 RYR6TY GLA → DUB May 28, 20:45 UTCMay 28, 21:25 UTC40m
2026-05-28 RYR6LT BER → STN May 28, 19:35 UTCMay 28, 20:10 UTC35m
2026-05-28 RYR2NQ BDS → VCE May 28, 17:45 UTCMay 28, 18:45 UTC1h 0m
2026-05-28 RYR2CK EIN → FAO May 28, 15:40 UTCMay 28, 16:35 UTC55m
2026-05-28 RYR84PU ATH → DUB May 28, 09:45 UTCMay 28, 13:55 UTC4h 10m
2026-05-28 RYR47FK DUB → ATH May 28, 05:05 UTCMay 28, 08:50 UTC3h 45m
2026-05-27 RYR3LP STN → DUB May 27, 21:20 UTCMay 27, 22:10 UTC50m
2026-05-27 RYR11PM BCN → STN May 27, 18:05 UTCMay 27, 19:50 UTC1h 45m
2026-05-27 RYR33DQ STN → BCN May 27, 14:55 UTCMay 27, 16:40 UTC1h 45m
2026-05-27 RYR39FX AAR → STN May 27, 11:55 UTCMay 27, 13:15 UTC1h 20m
2026-05-27 RYR9SE STN → AAR May 27, 09:55 UTCMay 27, 11:10 UTC1h 15m
2026-05-27 RYR85FA BGY → STN May 27, 07:20 UTCMay 27, 08:55 UTC1h 35m
2026-05-27 RYR98ML STN → BGY May 27, 05:04 UTCMay 27, 06:29 UTC1h 25m
2026-05-26 RYR70XA BUD → STN May 26, 19:55 UTCMay 26, 22:05 UTC2h 10m
2026-05-26 RYR36AQ STN → BUD May 26, 17:09 UTCMay 26, 19:05 UTC1h 55m
2026-05-26 RYR28DD TRN → STN May 26, 14:35 UTCMay 26, 16:10 UTC1h 35m
2026-05-26 RYR17PP STN → TRN May 26, 11:50 UTCMay 26, 13:34 UTC1h 45m
2026-05-26 RYR82SK VIE → BCN May 26, 08:24 UTCMay 26, 10:29 UTC2h 5m
2026-05-26 RYR3GM PMI → NUE May 26, 05:25 UTCMay 26, 07:24 UTC2h 0m
2026-05-25 RYR70XA BUD → STN May 25, 21:19 UTCMay 25, 23:24 UTC2h 5m
2026-05-25 RYR36AQ STN → BUD May 25, 18:35 UTCMay 25, 20:40 UTC2h 4m
2026-05-25 RYR65JW MAH → STN May 25, 14:10 UTCMay 25, 16:10 UTC2h 0m
2026-05-25 RYR34DP STN → MAH May 25, 10:55 UTCMay 25, 13:05 UTC2h 10m
2026-05-25 RYR82JL TIA → CIA May 25, 08:35 UTCMay 25, 09:35 UTC1h 0m
2026-05-25 RYR45TM STN → HAM May 25, 06:25 UTCMay 25, 07:30 UTC1h 5m
2026-05-24 RUK9273 AGA → STN May 24, 23:00 UTCMay 24, 23:46 UTC46m
2026-05-24 RYR508H STN → RIX May 24, 18:45 UTCMay 24, 21:00 UTC2h 15m
2026-05-24 RYR3262 SVQ → ORK May 24, 15:30 UTCMay 24, 17:45 UTC2h 15m
2026-05-24 RYR2P BRU → DUB May 24, 13:10 UTCMay 24, 14:20 UTC1h 10m
2026-05-24 RYR26NK SVQ → IBZ May 24, 11:00 UTCMay 24, 12:00 UTC1h 0m
2026-05-24 RYR21BU POZ → BGY May 24, 07:50 UTCMay 24, 09:55 UTC2h 5m
2026-05-24 RYR1246 SVQ → BVA May 24, 04:45 UTCMay 24, 06:55 UTC2h 10m
2026-05-23 RYR8SK AMS → DUB May 23, 21:30 UTCMay 23, 22:50 UTC1h 20m
2026-05-23 RYR9GB BGY → BRS May 23, 19:10 UTCMay 23, 20:30 UTC1h 20m
2026-05-23 RYR5349 CTA → SVQ May 23, 15:40 UTCMay 23, 18:15 UTC2h 36m
2026-05-23 RYR1MV TRF → AGP May 23, 12:10 UTCMay 23, 14:35 UTC2h 25m
2026-05-23 RYR31AZ MLA → SVQ May 23, 08:40 UTCMay 23, 11:15 UTC2h 35m
2026-05-23 RYR74DF SVQ → MLA May 23, 05:30 UTCMay 23, 07:55 UTC2h 25m
2026-05-22 RYR15CF SVQ → TFS May 22, 16:30 UTCMay 22, 21:40 UTC5h 10m
2026-05-22 RYR4DC FKB → RAK May 22, 14:05 UTCMay 22, 15:45 UTC1h 40m
2026-05-22 RYR9668 LNZ → SZG May 22, 12:00 UTCMay 22, 13:20 UTC1h 20m
2026-05-22 RYR4QG PMO → DUB May 22, 08:35 UTCMay 22, 11:10 UTC2h 35m
2026-05-22 RYR3SB MAD → BUD May 22, 04:55 UTCMay 22, 07:30 UTC2h 35m
2026-05-21 RYR126H VLC → BRS May 21, 19:05 UTCMay 21, 21:20 UTC2h 15m

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

Mode-S 4CA816 frequently asked

What is Mode-S code 4CA816?
4CA816 is an ICAO 24-bit transponder address. Allocated to Ireland. Assigned to EI-EKX.
Where is Mode-S 4CA816 registered?
Mode-S code 4CA816 is allocated to Ireland (IE). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 4CA816 broadcasting right now?
No active broadcast right now. Last signal was 3h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 4CA816, octal 23124026, decimal 5,023,766.
What flights does 4CA816 operate?
Mode-S 4CA816 has broadcast 20 distinct callsigns, including RYR97ZH, RYR533D, RYR89DJ, RYR7VV, RYR771U.