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
Broadcasting now · callsign RYR89UQ · 7,725 ft
Flights observed
687
Distinct callsigns
20
Country
IE
Last broadcast
Jul 26, 21:15 UTC

Current position

4CA61D is currently broadcasting. Map zoomed to live position.

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
RYR8UC Ryanair 10 2026-07-26
RYR13KA Ryanair 10 2026-07-26
RYR3VD Ryanair 7 2026-04-20
RYR84ZP Ryanair 6 2026-07-25
RYR64JJ Ryanair 6 2026-07-26
RYR1MT Ryanair 6 2026-07-26
RYR114K Ryanair 6 2026-07-25
RYR3LE Ryanair 5 2026-07-26
RYR1DC Ryanair 5 2026-07-26
RYR7CW Ryanair 4 2026-07-25
RYR67YC Ryanair 4 2026-07-25
RYR63PR Ryanair 4 2026-04-20
RYR55NA - 4 2026-07-17
RYR53UZ Ryanair 4 2026-05-01
RYR52TV Ryanair 4 2026-05-02
RYR50GF Ryanair 4 2026-05-01
RYR4916 - 4 2026-07-17
RYR3JH Ryanair 4 2026-05-02
RYR33XW - 4 2026-07-23
RYR26ZV Ryanair 4 2026-07-23

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 RYR1DC CRL → CIA Jul 26, 20:25 UTCJul 26, 21:15 UTC50m
2026-07-26 RYR3LE TRN → BDS Jul 26, 17:55 UTCJul 26, 19:10 UTC1h 15m
2026-07-26 RYR8UC CPH → VIE Jul 26, 15:35 UTCJul 26, 16:30 UTC55m
2026-07-26 RYR13KA TRN → CAG Jul 26, 13:35 UTCJul 26, 14:45 UTC1h 10m
2026-07-26 RYR350A SUF → TRN Jul 26, 10:55 UTCJul 26, 12:25 UTC1h 30m
2026-07-26 RYR53RB TRN → SUF Jul 26, 08:45 UTCJul 26, 10:05 UTC1h 20m
2026-07-26 RYR64JJ GDN → BGY Jul 26, 06:15 UTCJul 26, 07:45 UTC1h 31m
2026-07-26 RYR1MT BGY → AGP Jul 26, 04:10 UTCJul 26, 05:20 UTC1h 10m
2026-07-25 RYR7CW EDI → IBZ Jul 25, 18:50 UTCJul 25, 19:55 UTC1h 5m
2026-07-25 RYR67YC NCL → PFO Jul 25, 16:55 UTCJul 25, 17:55 UTC1h 0m
2026-07-25 RYR8UC CPH → VIE Jul 25, 15:15 UTCJul 25, 16:15 UTC1h 0m
2026-07-25 RYR13KA TRN → CAG Jul 25, 13:25 UTCJul 25, 14:20 UTC55m
2026-07-25 RYR64QD TSF → TFS Jul 25, 10:55 UTCJul 25, 12:15 UTC1h 20m
2026-07-25 RYR81UZ TRN → PMO Jul 25, 08:45 UTCJul 25, 09:55 UTC1h 10m
2026-07-25 RYR114K PMO → TRN Jul 25, 06:45 UTCJul 25, 08:05 UTC1h 20m
2026-07-25 RYR84ZP TRN → PMO Jul 25, 04:30 UTCJul 25, 05:45 UTC1h 15m
2026-07-24 RYR1DC CRL → CIA Jul 24, 18:25 UTCJul 24, 19:50 UTC1h 25m
2026-07-24 RYR3LE TRN → BDS Jul 24, 16:05 UTCJul 24, 17:20 UTC1h 15m
2026-07-24 RYR8365 VNO → TRN Jul 24, 13:10 UTCJul 24, 15:15 UTC2h 5m
2026-07-24 RYR8366 TRN → VNO Jul 24, 09:55 UTCJul 24, 12:15 UTC2h 20m
2026-07-24 RYR17PP STN → TRN Jul 24, 07:15 UTCJul 24, 08:45 UTC1h 30m
2026-07-24 RYR28DD TRN → STN Jul 24, 04:30 UTCJul 24, 06:05 UTC1h 35m
2026-07-23 RYR7CW EDI → IBZ Jul 23, 19:00 UTCJul 23, 20:05 UTC1h 5m
2026-07-23 RYR67YC NCL → PFO Jul 23, 17:15 UTCJul 23, 18:20 UTC1h 5m
2026-07-23 RYR26ZV MAN → SKG Jul 23, 15:05 UTCJul 23, 16:30 UTC1h 25m
2026-07-23 RYR33XW - Jul 23, 13:10 UTCJul 23, 14:10 UTC1h 0m
2026-07-23 RYR9JQ AGP → LBA Jul 23, 11:00 UTCJul 23, 12:15 UTC1h 15m
2026-07-23 RYR354V TRN → NAP Jul 23, 08:50 UTCJul 23, 09:45 UTC55m
2026-07-23 RYR64JJ GDN → BGY Jul 23, 06:30 UTCJul 23, 08:00 UTC1h 30m
2026-07-23 RYR1MT BGY → AGP Jul 23, 04:15 UTCJul 23, 05:25 UTC1h 10m
2026-07-22 RYR17RY SVQ → TRN Jul 22, 17:30 UTCJul 22, 19:25 UTC1h 55m
2026-07-22 RYR78QQ TRN → SVQ Jul 22, 14:30 UTCJul 22, 16:35 UTC2h 5m
2026-07-22 RYR41CF MLA → TRN Jul 22, 11:55 UTCJul 22, 13:40 UTC1h 45m
2026-07-22 RYR45NP - Jul 22, 11:10 UTCJul 22, 11:15 UTC5m
2026-07-22 RYR62CY TRN → CTA Jul 22, 04:00 UTCJul 22, 05:25 UTC1h 25m
2026-07-21 RYR77ZD TRN → TRN Jul 21, 11:50 UTCJul 21, 18:30 UTC6h 40m
2026-07-21 RYR4UY RAK → TLS Jul 21, 08:25 UTCJul 21, 10:00 UTC1h 35m
2026-07-21 RYR48ML TRN → CTA Jul 21, 05:55 UTCJul 21, 07:15 UTC1h 20m
2026-07-20 RYR26ZV BRI → TRN Jul 20, 19:15 UTCJul 20, 20:40 UTC1h 25m
2026-07-20 RYR33XW - Jul 20, 17:15 UTCJul 20, 18:30 UTC1h 15m
2026-07-20 RYR4UY - Jul 20, 14:55 UTCJul 20, 16:25 UTC1h 30m
2026-07-20 RYR48ML - Jul 20, 12:20 UTCJul 20, 13:40 UTC1h 20m
2026-07-20 RYR48WU - Jul 20, 09:50 UTCJul 20, 11:15 UTC1h 25m
2026-07-20 RYR59GQ TRN → BRI Jul 20, 07:45 UTCJul 20, 09:00 UTC1h 15m
2026-07-20 RYR8UC CPH → VIE Jul 20, 06:05 UTCJul 20, 07:00 UTC55m
2026-07-20 RYR13KA TRN → CAG Jul 20, 03:55 UTCJul 20, 04:50 UTC55m
2026-07-19 RYR1DC - Jul 19, 19:30 UTCJul 19, 20:55 UTC1h 25m
2026-07-19 RYR3LE - Jul 19, 17:30 UTCJul 19, 18:45 UTC1h 15m
2026-07-19 RYR8UC - Jul 19, 15:20 UTCJul 19, 16:20 UTC1h 0m
2026-07-19 RYR13KA - Jul 19, 13:25 UTCJul 19, 14:20 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?
Yes. Mode-S 4CA61D is currently airborne.
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 RYR8UC, RYR13KA, RYR3VD, RYR84ZP, RYR64JJ.