Apparatus

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sensors Mode-S transponder

4CA61E

ICAO 24-bit transponder address · allocated to Ireland

Currently assigned to EI-DWR · BOEING 737-800

Hex
4CA61E
Octal
23123036
Decimal
5,023,262
Country
IE
Tail
EI-DWR
Type
B738
No current signal · last broadcast Jul 26, 21:30 UTC
Flights observed
692
Distinct callsigns
20
Country
IE
Last broadcast
Jul 26, 21:30 UTC

Last known position

Most recent position reported by Mode-S 4CA61E.

Country allocation

The ICAO 24-bit address 4CA61E 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
RYR8ZZ - 4 2026-06-23
RYR74KW - 4 2026-06-23
RYR9WQ - 3 2026-06-16
RYR94VL Ryanair 3 2026-07-21
RYR8XV - 3 2026-06-28
RYR86LD - 3 2026-07-07
RYR82DX Ryanair 3 2026-06-17
RYR7EK - 3 2026-06-29
RYR7CB - 3 2026-06-28
RYR765L - 3 2026-06-22
RYR74SB Ryanair 3 2026-06-17
RYR74JQ Ryanair 3 2026-06-17
RYR70HT Ryanair 3 2026-06-17
RYR688B - 3 2026-07-07
RYR65JG - 3 2026-06-16
RYR5HT Ryanair 3 2026-07-26
RYR59QZ Ryanair 3 2026-06-17
RYR4GT Ryanair 3 2026-06-14
RYR46XX Ryanair 3 2026-07-26
RYR45TN - 3 2026-06-22

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 RYR78UB FCO → EIN Jul 26, 21:00 UTCJul 26, 21:30 UTC30m
2026-07-26 RYR91XZ ALC → STN Jul 26, 17:30 UTCJul 26, 20:10 UTC2h 40m
2026-07-26 RYR163D TRN → SVQ Jul 26, 14:05 UTCJul 26, 16:15 UTC2h 10m
2026-07-26 RYR46XX BGY → MAN Jul 26, 08:10 UTCJul 26, 10:00 UTC1h 50m
2026-07-26 RYR5HT MAN → BGY Jul 26, 05:30 UTCJul 26, 07:10 UTC1h 41m
2026-07-25 RYR46XX BGY → MAN Jul 25, 19:25 UTCJul 25, 21:05 UTC1h 40m
2026-07-25 RYR5HT MAN → BGY Jul 25, 16:40 UTCJul 25, 18:25 UTC1h 45m
2026-07-25 RYR48BC - Jul 25, 13:05 UTCJul 25, 15:35 UTC2h 30m
2026-07-25 RYR6965 MAN → VLC Jul 25, 10:00 UTCJul 25, 12:15 UTC2h 15m
2026-07-25 RYR4KN DUB → FRA Jul 25, 08:20 UTCJul 25, 08:55 UTC35m
2026-07-25 RYR77GB MAN → DUB Jul 25, 06:15 UTCJul 25, 06:55 UTC40m
2026-07-24 RYR70WZ VLC → MAN Jul 24, 22:30 UTCJul 25, 00:35 UTC2h 5m
2026-07-24 RYR3SL BCN → BGY Jul 24, 19:20 UTCJul 24, 21:30 UTC2h 10m
2026-07-24 RYR2218 - Jul 24, 12:45 UTCJul 24, 13:20 UTC35m
2026-07-24 RYR53RK BOH → ALC Jul 24, 09:10 UTCJul 24, 11:50 UTC2h 40m
2026-07-24 RYR1WH OPO → EIN Jul 24, 06:10 UTCJul 24, 08:15 UTC2h 5m
2026-07-23 RYR628R RMU → DUB Jul 23, 20:20 UTCJul 23, 22:40 UTC2h 20m
2026-07-23 RYR76RK - Jul 23, 16:45 UTCJul 23, 19:10 UTC2h 25m
2026-07-23 RYR2UT BRS → POZ Jul 23, 13:40 UTCJul 23, 15:30 UTC1h 50m
2026-07-23 RYR6KC STN → NAP Jul 23, 10:55 UTCJul 23, 12:45 UTC1h 50m
2026-07-23 RYR47HU CGN → ACE Jul 23, 08:45 UTCJul 23, 09:55 UTC1h 10m
2026-07-23 RYR19WY DUB → AMS Jul 23, 06:25 UTCJul 23, 07:35 UTC1h 10m
2026-07-22 RYR98EE BCN → DUB Jul 22, 22:10 UTCJul 23, 00:15 UTC2h 5m
2026-07-22 RYR2926 BRU → BCN Jul 22, 19:20 UTCJul 22, 20:55 UTC1h 35m
2026-07-22 RYR2925 BCN → BRU Jul 22, 16:45 UTCJul 22, 18:25 UTC1h 40m
2026-07-22 RYR84AV CRL → BCN Jul 22, 13:20 UTCJul 22, 15:00 UTC1h 40m
2026-07-22 RYR5UM ALC → HEL Jul 22, 11:10 UTCJul 22, 12:35 UTC1h 25m
2026-07-22 RYR44MH BCN → DUB Jul 22, 04:00 UTCJul 22, 05:25 UTC1h 25m
2026-07-21 RYR37KT DUB → BCN Jul 21, 21:30 UTCJul 21, 23:35 UTC2h 5m
2026-07-21 RYR17NT BCN → DUB Jul 21, 18:30 UTCJul 21, 20:45 UTC2h 15m
2026-07-21 RYR3175 IBZ → BCN Jul 21, 16:30 UTCJul 21, 17:15 UTC45m
2026-07-21 RYR3174 BCN → IBZ Jul 21, 14:50 UTCJul 21, 15:25 UTC35m
2026-07-21 RYR94VL TRS → BCN Jul 21, 11:45 UTCJul 21, 13:30 UTC1h 45m
2026-07-21 RYR78HC BCN → TRS Jul 21, 09:35 UTCJul 21, 11:00 UTC1h 25m
2026-07-21 RYR28UR OPO → BCN Jul 21, 06:55 UTCJul 21, 08:20 UTC1h 25m
2026-07-21 RYR1CV DUB → KIR Jul 21, 04:25 UTCJul 21, 05:50 UTC1h 25m
2026-07-20 RYR15QV - Jul 20, 20:15 UTCJul 20, 21:45 UTC1h 30m
2026-07-20 RYR89BH - Jul 20, 17:55 UTCJul 20, 19:20 UTC1h 25m
2026-07-20 RYR17KF - Jul 20, 13:15 UTCJul 20, 14:55 UTC1h 40m
2026-07-20 RYR84TT - Jul 20, 09:20 UTCJul 20, 10:50 UTC1h 30m
2026-07-20 RYR695G - Jul 20, 06:50 UTCJul 20, 08:00 UTC1h 10m
2026-07-20 RYR15FK BCN → AGP Jul 20, 04:05 UTCJul 20, 05:25 UTC1h 20m
2026-07-19 RYR50ZJ - Jul 19, 22:00 UTCJul 19, 23:25 UTC1h 25m
2026-07-19 RYR62NA - Jul 19, 18:15 UTCJul 19, 19:30 UTC1h 15m
2026-07-19 RYR94VL TRS → BCN Jul 19, 15:15 UTCJul 19, 16:55 UTC1h 40m
2026-07-19 RYR78HC BCN → TRS Jul 19, 13:10 UTCJul 19, 14:35 UTC1h 25m
2026-07-19 RYR59RR - Jul 19, 10:10 UTCJul 19, 11:35 UTC1h 25m
2026-07-19 RYR93HA - Jul 19, 08:05 UTCJul 19, 09:15 UTC1h 10m
2026-07-19 RYR3029 IBZ → BCN Jul 19, 05:35 UTCJul 19, 06:10 UTC35m
2026-07-19 RYR3028 BCN → IBZ Jul 19, 04:00 UTCJul 19, 04:40 UTC40m

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

Mode-S 4CA61E frequently asked

What is Mode-S code 4CA61E?
4CA61E is an ICAO 24-bit transponder address. Allocated to Ireland. Assigned to EI-DWR.
Where is Mode-S 4CA61E registered?
Mode-S code 4CA61E is allocated to Ireland (IE). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 4CA61E broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 21:30 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 4CA61E, octal 23123036, decimal 5,023,262.
What flights does 4CA61E operate?
Mode-S 4CA61E has broadcast 20 distinct callsigns, including RYR8ZZ, RYR74KW, RYR9WQ, RYR94VL, RYR8XV.