Apparatus

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sensors Mode-S transponder

4CA61D

ICAO 24-bit transponder address · allocated to Ireland

Currently assigned to EI-DWP · BOEING 737-800

Hex
4CA61D
Octal
23123035
Decimal
5,023,261
Country
IE
Tail
EI-DWP
Type
B738
No current signal · last broadcast 1h ago
Flights observed
610
Distinct callsigns
20
Country
IE
Last broadcast
1h ago

Last known position

Most recent position reported by Mode-S 4CA61D.

Country allocation

The ICAO 24-bit address 4CA61D 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
RYR3VD Ryanair 7 2026-04-20
RYR8UC - 4 2026-07-14
RYR84ZP - 4 2026-07-13
RYR63PR Ryanair 4 2026-04-20
RYR53UZ Ryanair 4 2026-05-01
RYR52TV Ryanair 4 2026-05-02
RYR50GF Ryanair 4 2026-05-01
RYR3JH Ryanair 4 2026-05-02
RYR13KA - 4 2026-07-14
RYR114K - 4 2026-07-13
RYR9ED Ryanair 3 2026-06-12
RYR92SN Ryanair 3 2026-04-19
RYR8XW Ryanair 3 2026-04-30
RYR8771 - 3 2026-07-14
RYR877 - 3 2026-07-14
RYR7LD - 3 2026-06-26
RYR6M Ryanair 3 2026-04-30
RYR64JJ - 3 2026-07-13
RYR5PU Ryanair 3 2026-06-12
RYR55NA - 3 2026-07-14

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-15 RYR65JP - Jul 15, 06:35 UTCJul 15, 07:15 UTC40m
2026-07-15 RYR62CY - Jul 15, 04:00 UTCJul 15, 05:30 UTC1h 30m
2026-07-14 RYR4916 PMO → TRN Jul 14, 19:15 UTCJul 14, 20:35 UTC1h 20m
2026-07-14 RYR55NA TRN → PMO Jul 14, 17:15 UTCJul 14, 18:30 UTC1h 15m
2026-07-14 RYR8UC CAG → TRN Jul 14, 15:35 UTCJul 14, 16:35 UTC1h 0m
2026-07-14 RYR13KA - Jul 14, 13:25 UTCJul 14, 14:15 UTC50m
2026-07-14 RYR8771 - Jul 14, 10:55 UTCJul 14, 12:30 UTC1h 35m
2026-07-14 RYR877 - Jul 14, 08:40 UTCJul 14, 09:55 UTC1h 15m
2026-07-14 RYR1DC - Jul 14, 06:20 UTCJul 14, 07:45 UTC1h 25m
2026-07-14 RYR3LE TRN → BDS Jul 14, 04:15 UTCJul 14, 05:30 UTC1h 15m
2026-07-13 RYR2557 - Jul 13, 18:30 UTCJul 13, 20:00 UTC1h 30m
2026-07-13 RYR517L - Jul 13, 16:05 UTCJul 13, 17:25 UTC1h 20m
2026-07-13 RYR114K - Jul 13, 12:15 UTCJul 13, 13:35 UTC1h 20m
2026-07-13 RYR84ZP - Jul 13, 10:05 UTCJul 13, 11:10 UTC1h 5m
2026-07-13 RYR64JJ - Jul 13, 07:40 UTCJul 13, 09:05 UTC1h 25m
2026-07-13 RYR1MT - Jul 13, 05:10 UTCJul 13, 06:30 UTC1h 20m
2026-07-12 RYR77ZD TRN → TRN Jul 12, 13:05 UTCJul 12, 19:40 UTC6h 35m
2026-07-12 RYR8771 - Jul 12, 10:05 UTCJul 12, 11:30 UTC1h 25m
2026-07-12 RYR877 - Jul 12, 07:55 UTCJul 12, 09:10 UTC1h 15m
2026-07-12 RYR11HX - Jul 12, 05:55 UTCJul 12, 06:55 UTC1h 0m
2026-07-12 RYR40HE - Jul 12, 04:05 UTCJul 12, 05:05 UTC1h 0m
2026-07-11 RYR7CW EDI → IBZ Jul 11, 19:55 UTCJul 11, 21:00 UTC1h 5m
2026-07-11 RYR67YC TRN → CRL Jul 11, 18:00 UTCJul 11, 19:05 UTC1h 5m
2026-07-11 RYR8UC - Jul 11, 15:55 UTCJul 11, 17:10 UTC1h 15m
2026-07-11 RYR13KA TRN → DCI Jul 11, 13:50 UTCJul 11, 14:55 UTC1h 5m
2026-07-11 RYR64QD - Jul 11, 11:20 UTCJul 11, 12:30 UTC1h 10m
2026-07-11 RYR81UZ - Jul 11, 09:05 UTCJul 11, 10:10 UTC1h 5m
2026-07-11 RYR114K - Jul 11, 06:40 UTCJul 11, 07:50 UTC1h 10m
2026-07-11 RYR84ZP - Jul 11, 04:30 UTCJul 11, 05:45 UTC1h 15m
2026-07-10 RYR8UC - Jul 10, 20:15 UTCJul 10, 21:20 UTC1h 5m
2026-07-10 RYR13KA TRN → CAG Jul 10, 18:30 UTCJul 10, 19:35 UTC1h 5m
2026-07-10 RYR63CD BCN → TRN Jul 10, 16:40 UTCJul 10, 17:40 UTC1h 0m
2026-07-10 RYR81XM TRN → BCN Jul 10, 13:00 UTCJul 10, 14:15 UTC1h 15m
2026-07-10 RYR4916 - Jul 10, 10:25 UTCJul 10, 11:35 UTC1h 10m
2026-07-10 RYR55NA - Jul 10, 08:10 UTCJul 10, 09:30 UTC1h 20m
2026-07-10 RYR114K - Jul 10, 06:10 UTCJul 10, 07:20 UTC1h 10m
2026-07-10 RYR84ZP - Jul 10, 04:00 UTCJul 10, 05:15 UTC1h 15m
2026-07-09 RYR7CW EDI → IBZ Jul 9, 19:55 UTCJul 9, 21:00 UTC1h 5m
2026-07-09 RYR67YC TRN → CRL Jul 9, 18:05 UTCJul 9, 19:10 UTC1h 5m
2026-07-09 RYR26ZV - Jul 9, 16:00 UTCJul 9, 17:15 UTC1h 15m
2026-07-09 RYR33XW - Jul 9, 13:50 UTCJul 9, 15:10 UTC1h 20m
2026-07-09 RYR9JQ - Jul 9, 11:50 UTCJul 9, 12:55 UTC1h 5m
2026-07-09 RYR354V - Jul 9, 08:50 UTCJul 9, 09:50 UTC1h 0m
2026-07-09 RYR64JJ - Jul 9, 06:30 UTCJul 9, 07:50 UTC1h 20m
2026-07-09 RYR1MT - Jul 9, 04:20 UTCJul 9, 05:40 UTC1h 20m
2026-07-08 RYR6FP - Jul 8, 19:35 UTCJul 8, 20:55 UTC1h 20m
2026-07-08 RYR9QM - Jul 8, 17:10 UTCJul 8, 18:30 UTC1h 20m
2026-07-08 RYR4UY - Jul 8, 14:50 UTCJul 8, 16:20 UTC1h 30m
2026-07-08 RYR48ML - Jul 8, 12:10 UTCJul 8, 13:35 UTC1h 25m
2026-07-08 RYR9KB STN → PMO Jul 8, 10:00 UTCJul 8, 10:55 UTC55m

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

Mode-S 4CA61D frequently asked

What is Mode-S code 4CA61D?
4CA61D is an ICAO 24-bit transponder address. Allocated to Ireland. Assigned to EI-DWP.
Where is Mode-S 4CA61D registered?
Mode-S code 4CA61D is allocated to Ireland (IE). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 4CA61D broadcasting right now?
No active broadcast right now. Last signal was 1h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 4CA61D, octal 23123035, decimal 5,023,261.
What flights does 4CA61D operate?
Mode-S 4CA61D has broadcast 20 distinct callsigns, including RYR3VD, RYR8UC, RYR84ZP, RYR63PR, RYR53UZ.