Apparatus

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sensors Mode-S transponder

4CA225

ICAO 24-bit transponder address · allocated to Ireland

Currently assigned to EI-DCK · BOEING 737-800

Hex
4CA225
Octal
23121045
Decimal
5,022,245
Country
IE
Tail
EI-DCK
Type
B738
No current signal · last broadcast 2h ago
Flights observed
595
Distinct callsigns
20
Country
IE
Last broadcast
2h ago

Last known position

Most recent position reported by Mode-S 4CA225.

Country allocation

The ICAO 24-bit address 4CA225 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
RYR100T - 4 2026-07-07
RYR86QR Ryanair 3 2026-05-27
RYR82SK Ryanair 3 2026-06-23
RYR76PX Ryanair 3 2026-05-15
RYR765L Ryanair 3 2026-05-10
RYR74PT Ryanair 3 2026-05-02
RYR73ZU Ryanair 3 2026-05-27
RYR6002 - 3 2026-04-13
RYR5LF Ryanair 3 2026-06-04
RYR52XB Ryanair 3 2026-05-15
RYR4DZ Ryanair 3 2026-06-13
RYR45TN Ryanair 3 2026-05-10
RYR43NU Ryanair 3 2026-06-04
RYR3GM - 3 2026-06-23
RYR372Y Ryanair 3 2026-05-27
RYR2JT Ryanair 3 2026-05-02
RYR1NA Ryanair 3 2026-05-06
RYR9JT Ryanair 2 2026-04-15
RYR9219 Ryanair 2 2026-04-14
RYR9065 Ryanair 2 2026-04-16

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-15 RYR65BP - Jul 15, 10:00 UTCJul 15, 10:40 UTC40m
2026-07-15 RYR58HP STN → DUB Jul 15, 07:50 UTCJul 15, 09:00 UTC1h 10m
2026-07-15 RYR2DC DUB → STN Jul 15, 05:40 UTCJul 15, 06:45 UTC1h 5m
2026-07-14 RYR17NT BCN → DUB Jul 14, 18:25 UTCJul 14, 20:30 UTC2h 5m
2026-07-14 RYR3175 IBZ → BCN Jul 14, 16:35 UTCJul 14, 17:05 UTC30m
2026-07-14 RYR3174 BCN → IBZ Jul 14, 14:45 UTCJul 14, 15:20 UTC35m
2026-07-14 RYR94VL TRS → BCN Jul 14, 12:00 UTCJul 14, 13:45 UTC1h 45m
2026-07-14 RYR78HC BCN → TRS Jul 14, 09:40 UTCJul 14, 11:00 UTC1h 20m
2026-07-14 RYR28UR OPO → BCN Jul 14, 07:00 UTCJul 14, 08:25 UTC1h 25m
2026-07-14 RYR1CV BCN → OPO Jul 14, 04:35 UTCJul 14, 06:05 UTC1h 30m
2026-07-13 RYR8137 IBZ → BCN Jul 13, 22:00 UTCJul 13, 22:30 UTC30m
2026-07-13 RYR89HZ BCN → IBZ Jul 13, 20:25 UTCJul 13, 21:00 UTC35m
2026-07-13 RYR96RZ OPO → BCN Jul 13, 17:40 UTCJul 13, 19:00 UTC1h 20m
2026-07-13 RYR30UJ BCN → OPO Jul 13, 15:20 UTCJul 13, 16:50 UTC1h 30m
2026-07-13 RYR3184 - Jul 13, 12:25 UTCJul 13, 14:00 UTC1h 35m
2026-07-13 RYR6NH - Jul 13, 08:25 UTCJul 13, 10:50 UTC2h 25m
2026-07-13 RYR994L - Jul 13, 04:55 UTCJul 13, 07:10 UTC2h 15m
2026-07-12 RYR6276 - Jul 12, 20:20 UTCJul 12, 23:20 UTC3h 0m
2026-07-12 RYR6277 - Jul 12, 16:25 UTCJul 12, 19:10 UTC2h 45m
2026-07-12 RYR5495 - Jul 12, 14:45 UTCJul 12, 15:15 UTC30m
2026-07-12 RYR54MX - Jul 12, 13:20 UTCJul 12, 13:50 UTC30m
2026-07-12 RYR9EA - Jul 12, 09:45 UTCJul 12, 12:20 UTC2h 35m
2026-07-12 RYR15BZ - Jul 12, 06:25 UTCJul 12, 08:35 UTC2h 10m
2026-07-11 RYR55DP - Jul 11, 20:05 UTCJul 11, 22:50 UTC2h 45m
2026-07-11 RYR6352 - Jul 11, 15:45 UTCJul 11, 18:25 UTC2h 40m
2026-07-11 RYR3185 - Jul 11, 13:00 UTCJul 11, 14:35 UTC1h 35m
2026-07-11 RYR3184 - Jul 11, 10:05 UTCJul 11, 11:25 UTC1h 20m
2026-07-11 RYR4957 - Jul 11, 08:05 UTCJul 11, 09:05 UTC1h 0m
2026-07-11 RYR55YU - Jul 11, 05:50 UTCJul 11, 06:55 UTC1h 5m
2026-07-10 RYR9358 - Jul 10, 23:05 UTCJul 10, 23:40 UTC35m
2026-07-10 RYR776U - Jul 10, 19:45 UTCJul 10, 20:45 UTC1h 0m
2026-07-10 RYR3ZF - Jul 10, 18:10 UTCJul 10, 19:05 UTC55m
2026-07-10 RYR1QU - Jul 10, 14:45 UTCJul 10, 17:10 UTC2h 25m
2026-07-10 RYR7504 - Jul 10, 11:20 UTCJul 10, 13:50 UTC2h 30m
2026-07-10 RYR3349 - Jul 10, 04:10 UTCJul 10, 09:15 UTC5h 5m
2026-07-09 RYR81BL - Jul 9, 20:15 UTCJul 9, 22:45 UTC2h 30m
2026-07-09 RYR39LG - Jul 9, 16:55 UTCJul 9, 19:15 UTC2h 20m
2026-07-09 RYR77TG - Jul 9, 12:15 UTCJul 9, 14:35 UTC2h 20m
2026-07-09 RYR87CG - Jul 9, 08:55 UTCJul 9, 11:20 UTC2h 25m
2026-07-09 RYR209L - Jul 9, 04:55 UTCJul 9, 07:35 UTC2h 40m
2026-07-08 RYR8UD - Jul 8, 17:45 UTCJul 8, 20:15 UTC2h 30m
2026-07-08 RYR69ML - Jul 8, 14:15 UTCJul 8, 16:45 UTC2h 30m
2026-07-08 RYR30FY - Jul 8, 08:45 UTCJul 8, 11:05 UTC2h 20m
2026-07-08 RYR25ZE - Jul 8, 05:15 UTCJul 8, 07:40 UTC2h 25m
2026-07-07 RYR5WL - Jul 7, 20:15 UTCJul 7, 22:40 UTC2h 25m
2026-07-07 RYR100T - Jul 7, 10:55 UTCJul 7, 11:15 UTC20m
2026-07-07 RYR100T EMA → EMA Jul 7, 09:40 UTCJul 7, 10:35 UTC55m
2026-07-07 RYR100T - Jul 7, 08:30 UTCJul 7, 09:15 UTC45m
2026-07-07 RYR100T EMA → EMA Jul 7, 07:35 UTCJul 7, 08:10 UTC35m
2026-07-06 RYR9966 - Jul 6, 23:45 UTCJul 7, 00:10 UTC25m

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

Mode-S 4CA225 frequently asked

What is Mode-S code 4CA225?
4CA225 is an ICAO 24-bit transponder address. Allocated to Ireland. Assigned to EI-DCK.
Where is Mode-S 4CA225 registered?
Mode-S code 4CA225 is allocated to Ireland (IE). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 4CA225 broadcasting right now?
No active broadcast right now. Last signal was 2h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 4CA225, octal 23121045, decimal 5,022,245.
What flights does 4CA225 operate?
Mode-S 4CA225 has broadcast 20 distinct callsigns, including RYR100T, RYR86QR, RYR82SK, RYR76PX, RYR765L.