Apparatus

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sensors Mode-S transponder

4CA854

ICAO 24-bit transponder address · allocated to Ireland

Currently assigned to EI-EML · BOEING 737-800

Hex
4CA854
Octal
23124124
Decimal
5,023,828
Country
IE
Tail
EI-EML
Type
B738
Broadcasting now · callsign RYR23ML · 33,000 ft
Flights observed
316
Distinct callsigns
20
Country
IE
Last broadcast
2h ago

Current position

4CA854 is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address 4CA854 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
RYR8124 Ryanair 15 2026-05-23
RYR8LM - 14 2026-05-23
RYR3631 Ryanair 11 2026-05-22
RYR34HL Ryanair 11 2026-05-21
RYR26LU Ryanair 11 2026-05-21
RYR16EA Ryanair 10 2026-05-22
RYR73LC - 9 2026-05-22
RYR8KB Ryanair 8 2026-05-18
RYR8WQ Ryanair 7 2026-05-21
RYR4239 Ryanair 7 2026-05-07
RYR1BA Ryanair 7 2026-05-21
RYR9EN Ryanair 6 2026-05-07
RYR784B Ryanair 6 2026-05-15
RYR693D Ryanair 6 2026-05-22
RYR4RZ Ryanair 6 2026-05-15
RYR32KG Ryanair 6 2026-05-22
RYR1994 Ryanair 6 2026-05-15
RYR1193 Ryanair 6 2026-05-18
RYR8NP Ryanair 5 2026-05-07
RYR6VH Ryanair 5 2026-05-19

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-05-30 RYR9JQ AGP → LBA May 30, 06:25 UTCMay 30, 07:00 UTC35m
2026-05-30 RYR354V TRN → NAP May 30, 04:15 UTCMay 30, 05:10 UTC55m
2026-05-29 RYR8UC CPH → VIE May 29, 19:45 UTCMay 29, 20:40 UTC55m
2026-05-29 RYR13KA TRN → CAG May 29, 18:00 UTCMay 29, 18:50 UTC50m
2026-05-29 RYR63CD BCN → TRN May 29, 16:15 UTCMay 29, 17:20 UTC1h 5m
2026-05-29 RYR54SE FCO → BCN May 29, 13:45 UTCMay 29, 15:05 UTC1h 20m
2026-05-29 RYR243X BDS → FCO May 29, 11:30 UTCMay 29, 12:20 UTC50m
2026-05-29 RYR5842 FCO → BDS May 29, 10:00 UTCMay 29, 10:45 UTC45m
2026-05-29 RYR1TZ BRU → FCO May 29, 06:50 UTCMay 29, 08:25 UTC1h 35m
2026-05-29 RYR7JZ PMI → CRL May 29, 04:00 UTCMay 29, 05:50 UTC1h 50m
2026-05-28 RYR32SC MRS → FCO May 28, 22:05 UTCMay 28, 23:00 UTC55m
2026-05-28 RYR945 EDI → TRN May 28, 20:20 UTCMay 28, 21:25 UTC1h 5m
2026-05-28 RYR1EP OPO → TER May 28, 17:10 UTCMay 28, 18:50 UTC1h 40m
2026-05-28 RYR59HM FCO → EIN May 28, 14:35 UTCMay 28, 16:20 UTC1h 45m
2026-05-28 RYR5CR TFS → FCO May 28, 03:50 UTCMay 28, 13:05 UTC9h 15m
2026-05-27 RYR9KV GDN → TRF May 27, 21:45 UTCMay 27, 22:40 UTC55m
2026-05-27 RYR79AJ FCO → MRS May 27, 19:55 UTCMay 27, 20:50 UTC55m
2026-05-27 RYR17LQ BVA → FCO May 27, 17:10 UTCMay 27, 18:45 UTC1h 35m
2026-05-27 RYR1UQ FCO → BVA May 27, 14:30 UTCMay 27, 16:10 UTC1h 40m
2026-05-27 RYR4901 PMO → FCO May 27, 12:35 UTCMay 27, 13:15 UTC40m
2026-05-27 RYR15RK FCO → PMO May 27, 10:50 UTCMay 27, 11:20 UTC30m
2026-05-27 RYR8GM SNN → MRS May 27, 07:30 UTCMay 27, 09:40 UTC2h 10m
2026-05-27 RYR34SW FCO → AGP May 27, 04:09 UTCMay 27, 06:09 UTC2h 0m
2026-05-26 RYR25XX BCN → FCO May 26, 21:09 UTCMay 26, 22:29 UTC1h 20m
2026-05-26 RYR3CQ MAN → DUB May 26, 18:05 UTCMay 26, 19:34 UTC1h 30m
2026-05-26 RYR8QN BUD → LPL May 26, 15:29 UTCMay 26, 17:15 UTC1h 45m
2026-05-26 RYR61ZQ OPO → MRS May 26, 12:45 UTCMay 26, 14:24 UTC1h 40m
2026-05-26 RYR7D MXP → OPO May 26, 09:04 UTCMay 26, 11:09 UTC2h 5m
2026-05-26 RYR1RL BOH → FAO May 26, 05:59 UTCMay 26, 08:04 UTC2h 5m
2026-05-25 RYR9497 FAO → OPO May 25, 21:54 UTCMay 25, 22:40 UTC45m
2026-05-25 RYR8JH MAN → ALC May 25, 18:00 UTCMay 25, 20:50 UTC2h 50m
2026-05-25 RYR96PA FAO → NCL May 25, 14:15 UTCMay 25, 16:55 UTC2h 40m
2026-05-25 RYR9JN BER → ATH May 25, 10:35 UTCMay 25, 13:05 UTC2h 30m
2026-05-25 RYR96LF FAO → DUB May 25, 07:00 UTCMay 25, 09:25 UTC2h 25m
2026-05-24 RYR52NP WMI → FAO May 24, 18:20 UTCMay 24, 21:51 UTC3h 31m
2026-05-24 RYR6WJ VNO → TRN May 24, 13:25 UTCMay 24, 17:10 UTC3h 45m
2026-05-24 RYR6LY STN → ZAG May 24, 09:25 UTCMay 24, 12:00 UTC2h 35m
2026-05-24 RYR78UE FAO → FMM May 24, 05:40 UTCMay 24, 08:15 UTC2h 35m
2026-05-23 RYR2VB BHX → DUB May 23, 20:40 UTCMay 23, 22:20 UTC1h 40m
2026-05-23 RYR51LL DUB → TLS May 23, 17:10 UTCMay 23, 18:50 UTC1h 40m
2026-05-23 RYR292K MLA → CTA May 23, 13:55 UTCMay 23, 15:40 UTC1h 45m
2026-05-23 RYR2LK STN → BGY May 23, 10:40 UTCMay 23, 12:35 UTC1h 55m
2026-05-23 RYR59VR TLS → EDI May 23, 07:50 UTCMay 23, 09:55 UTC2h 5m
2026-05-23 RYR8LM IBZ → TLS May 23, 06:00 UTCMay 23, 06:55 UTC55m
2026-05-23 RYR8124 TLS → IBZ May 23, 04:15 UTCMay 23, 05:10 UTC55m
2026-05-22 RYR693D LIS → TLS May 22, 19:55 UTCMay 22, 21:15 UTC1h 20m
2026-05-22 RYR32KG TLS → LIS May 22, 17:15 UTCMay 22, 18:50 UTC1h 35m
2026-05-22 RYR3631 TSF → TLS May 22, 14:50 UTCMay 22, 16:10 UTC1h 20m
2026-05-22 RYR16EA TLS → TSF May 22, 12:45 UTCMay 22, 14:05 UTC1h 20m
2026-05-22 RYR73LC TLS → TLS May 22, 05:50 UTCMay 22, 11:40 UTC5h 50m

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

Mode-S 4CA854 frequently asked

What is Mode-S code 4CA854?
4CA854 is an ICAO 24-bit transponder address. Allocated to Ireland. Assigned to EI-EML.
Where is Mode-S 4CA854 registered?
Mode-S code 4CA854 is allocated to Ireland (IE). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 4CA854 broadcasting right now?
Yes. Mode-S 4CA854 is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 4CA854, octal 23124124, decimal 5,023,828.
What flights does 4CA854 operate?
Mode-S 4CA854 has broadcast 20 distinct callsigns, including RYR8124, RYR8LM, RYR3631, RYR34HL, RYR26LU.