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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 RYR1YL · 35,000 ft
Flights observed
627
Distinct callsigns
20
Country
IE
Last broadcast
Jul 26, 20:45 UTC

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
2026-07-26 RYR739Y CDT → BER Jul 26, 18:10 UTCJul 26, 20:40 UTC2h 30m
2026-07-26 RYR31MR BCN → BUD Jul 26, 14:55 UTCJul 26, 17:05 UTC2h 10m
2026-07-26 RYR97WV BGY → BER Jul 26, 13:00 UTCJul 26, 14:15 UTC1h 15m
2026-07-26 RYR96EU BER → BGY Jul 26, 10:35 UTCJul 26, 11:55 UTC1h 20m
2026-07-26 RYR8RZ CTA → STN Jul 26, 07:20 UTCJul 26, 09:05 UTC1h 45m
2026-07-26 RYR95MP BER → DUB Jul 26, 04:00 UTCJul 26, 06:15 UTC2h 15m
2026-07-25 RYR8YY EDI → CPH Jul 25, 19:10 UTCJul 25, 20:25 UTC1h 15m
2026-07-25 RYR77CN BER → STN Jul 25, 16:55 UTCJul 25, 18:15 UTC1h 20m
2026-07-25 RYR30TE ZAD → BER Jul 25, 14:55 UTCJul 25, 16:10 UTC1h 15m
2026-07-25 RYR5SB AGP → SCQ Jul 25, 12:45 UTCJul 25, 13:55 UTC1h 10m
2026-07-25 RYR2NB TRF → ALC Jul 25, 09:25 UTCJul 25, 11:40 UTC2h 15m
2026-07-25 RYR99FP BER → PMI Jul 25, 05:35 UTCJul 25, 07:50 UTC2h 15m
2026-07-24 RYR8RZ CTA → STN Jul 24, 19:15 UTCJul 24, 21:00 UTC1h 45m
2026-07-24 RYR95MP BER → DUB Jul 24, 16:30 UTCJul 24, 18:30 UTC2h 0m
2026-07-24 RYR95CH - Jul 24, 14:00 UTCJul 24, 15:50 UTC1h 50m
2026-07-24 RYR3EM BER → OTP Jul 24, 11:15 UTCJul 24, 13:10 UTC1h 55m
2026-07-24 RYR127K RAK → BER Jul 24, 06:35 UTCJul 24, 10:10 UTC3h 35m
2026-07-23 RYR30KM ALC → NOC Jul 23, 18:15 UTCJul 23, 21:00 UTC2h 45m
2026-07-23 RYR84AL RAK → TSF Jul 23, 14:20 UTCJul 23, 16:55 UTC2h 35m
2026-07-23 RYR60HU EIN → RAK Jul 23, 09:35 UTCJul 23, 12:50 UTC3h 15m
2026-07-23 RYR50JL RAK → EIN Jul 23, 05:20 UTCJul 23, 08:30 UTC3h 10m
2026-07-22 RYR6WC EDI → DUB Jul 22, 23:15 UTCJul 22, 23:45 UTC30m
2026-07-22 RYR6BQ BHX → WMI Jul 22, 21:25 UTCJul 22, 22:15 UTC50m
2026-07-22 RYR29PG BCN → RAK Jul 22, 18:30 UTCJul 22, 20:10 UTC1h 40m
2026-07-22 RYR9AY TFS → VIE Jul 22, 15:15 UTCJul 22, 17:10 UTC1h 55m
2026-07-22 RYR54FF CRL → RAK Jul 22, 11:10 UTCJul 22, 13:35 UTC2h 25m
2026-07-21 RYR36FD - Jul 21, 21:30 UTCJul 22, 00:45 UTC3h 15m
2026-07-21 RYR78YC RAK → HHN Jul 21, 17:10 UTCJul 21, 20:25 UTC3h 15m
2026-07-21 RYR90TA - Jul 21, 12:55 UTCJul 21, 15:50 UTC2h 55m
2026-07-21 RYR8868 RAK → PSA Jul 21, 07:15 UTCJul 21, 09:45 UTC2h 30m
2026-07-20 RYR7SJ VLC → RAK Jul 20, 19:55 UTCJul 20, 21:35 UTC1h 40m
2026-07-20 RYR25PE RAK → VLC Jul 20, 17:10 UTCJul 20, 18:40 UTC1h 30m
2026-07-20 RYR7BA LBA → GDN Jul 20, 15:10 UTCJul 20, 15:55 UTC45m
2026-07-20 RYR7HC OPO → LIL Jul 20, 08:15 UTCJul 20, 10:35 UTC2h 20m
2026-07-20 RYR9JB GOT → ZAD Jul 20, 04:50 UTCJul 20, 07:15 UTC2h 25m
2026-07-19 RYR23 STN → BVA Jul 19, 20:20 UTCJul 20, 00:20 UTC4h 0m
2026-07-19 RYR5CW RAK → KRK Jul 19, 15:10 UTCJul 19, 18:50 UTC3h 40m
2026-07-19 RYR30KM - Jul 19, 10:55 UTCJul 19, 13:50 UTC2h 55m
2026-07-19 RYR84AL RAK → TSF Jul 19, 06:30 UTCJul 19, 09:20 UTC2h 50m
2026-07-18 RYR11JB OUD → RAK Jul 18, 22:50 UTCJul 18, 23:50 UTC1h 0m
2026-07-18 RYR8205 - Jul 18, 17:35 UTCJul 18, 21:55 UTC4h 20m
2026-07-18 RYR5TM - Jul 18, 14:40 UTCJul 18, 16:40 UTC2h 0m
2026-07-18 RYR86TK - Jul 18, 09:35 UTCJul 18, 13:20 UTC3h 45m
2026-07-18 RYR42CL - Jul 18, 05:10 UTCJul 18, 08:15 UTC3h 5m
2026-07-17 RYR7BA LBA → GDN Jul 17, 19:20 UTCJul 17, 22:49 UTC3h 30m
2026-07-17 RYR20SB - Jul 17, 16:00 UTCJul 17, 17:55 UTC1h 55m
2026-07-17 RYR3PP - Jul 17, 13:10 UTCJul 17, 15:00 UTC1h 50m
2026-07-17 RYR217V BVA → RAK Jul 17, 08:45 UTCJul 17, 11:30 UTC2h 45m
2026-07-17 RYR338J - Jul 17, 05:15 UTCJul 17, 07:44 UTC2h 30m
2026-07-16 RYR7SJ - Jul 16, 20:39 UTCJul 16, 22:10 UTC1h 30m

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.