Apparatus

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sensors Mode-S transponder

4CA56D

ICAO 24-bit transponder address · allocated to Ireland

Currently assigned to EI-DWH · BOEING 737-800

Hex
4CA56D
Octal
23122555
Decimal
5,023,085
Country
IE
Tail
EI-DWH
Type
B738
No current signal · last broadcast 3h ago
Flights observed
429
Distinct callsigns
20
Country
IE
Last broadcast
3h ago

Last known position

Most recent position reported by Mode-S 4CA56D.

Country allocation

The ICAO 24-bit address 4CA56D 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
RYR54FN Ryanair 5 2026-04-30
RYR29BA Ryanair 5 2026-04-30
RYR824 Ryanair 4 2026-05-01
RYR6TX Ryanair 4 2026-06-06
RYR6RX Ryanair 4 2026-05-23
RYR56EF Ryanair 4 2026-05-23
RYR32RL Ryanair 4 2026-06-11
RYR2WF Ryanair 4 2026-06-11
RYR9NE - 3 2026-04-13
RYR95AT Ryanair 3 2026-04-29
RYR86CT Ryanair 3 2026-04-28
RYR85FH Ryanair 3 2026-04-30
RYR83TK Ryanair 3 2026-06-12
RYR7DL Ryanair 3 2026-05-01
RYR76GA - 3 2026-04-13
RYR6SW Ryanair 3 2026-04-30
RYR6LU Ryanair 3 2026-05-01
RYR6BT Ryanair 3 2026-05-18
RYR66DP Ryanair 3 2026-06-12
RYR5ZL Ryanair 3 2026-04-29

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-06-12 RYR4ZJ AHO → PSA Jun 12, 21:35 UTCJun 12, 22:15 UTC40m
2026-06-12 RYR7992 PSA → AHO Jun 12, 20:00 UTCJun 12, 20:45 UTC45m
2026-06-12 RYR5ZT NTE → VLC Jun 12, 17:40 UTCJun 12, 19:10 UTC1h 30m
2026-06-12 RYR43TW OPO → LUX Jun 12, 15:10 UTCJun 12, 16:45 UTC1h 35m
2026-06-12 RYR66DP STN → PSA Jun 12, 12:20 UTCJun 12, 13:50 UTC1h 30m
2026-06-12 RYR83TK PSA → STN Jun 12, 09:35 UTCJun 12, 11:25 UTC1h 50m
2026-06-12 RYR5TL VLC → PSA Jun 12, 07:05 UTCJun 12, 08:35 UTC1h 30m
2026-06-12 RYR46CU PSA → VLC Jun 12, 04:10 UTCJun 12, 05:40 UTC1h 30m
2026-06-11 RYR716U PRG → PSA Jun 11, 21:10 UTCJun 11, 22:15 UTC1h 5m
2026-06-11 RYR19SG CDT → STN Jun 11, 18:30 UTCJun 11, 19:55 UTC1h 25m
2026-06-11 RYR5XX BER → PSA Jun 11, 16:15 UTCJun 11, 17:45 UTC1h 30m
2026-06-11 RYR9PG STN → ORK Jun 11, 13:45 UTCJun 11, 15:20 UTC1h 35m
2026-06-11 RYR82UJ SOF → PSA Jun 11, 10:40 UTCJun 11, 12:15 UTC1h 35m
2026-06-11 RYR4MT BRS → PMI Jun 11, 08:15 UTCJun 11, 09:40 UTC1h 25m
2026-06-11 RYR2WF BLL → TRN Jun 11, 06:20 UTCJun 11, 07:15 UTC55m
2026-06-11 RYR32RL STN → CGN Jun 11, 04:30 UTCJun 11, 05:25 UTC55m
2026-06-10 RYR2GP AGP → EIN Jun 10, 20:35 UTCJun 10, 21:40 UTC1h 5m
2026-06-10 RYR564P PSA → BDS Jun 10, 19:05 UTCJun 10, 20:05 UTC1h 0m
2026-06-10 RYR9ZQ DUB → LTN Jun 10, 15:50 UTCJun 10, 18:10 UTC2h 20m
2026-06-10 RYR625N PSA → RHO Jun 10, 12:20 UTCJun 10, 14:40 UTC2h 20m
2026-06-10 RYR5NB VIE → BRE Jun 10, 10:05 UTCJun 10, 11:10 UTC1h 5m
2026-06-10 RYR761H PSA → BRI Jun 10, 08:20 UTCJun 10, 09:20 UTC1h 0m
2026-06-10 RYR2WF BLL → TRN Jun 10, 06:25 UTCJun 10, 07:20 UTC55m
2026-06-10 RYR32RL STN → CGN Jun 10, 04:40 UTCJun 10, 05:35 UTC55m
2026-06-09 RYR1LB CRL → LEI Jun 9, 19:55 UTCJun 9, 21:20 UTC1h 25m
2026-06-09 RYR66WT PSA → CRL Jun 9, 18:00 UTCJun 9, 19:20 UTC1h 20m
2026-06-09 RYR636Q BHX → PSA Jun 9, 15:35 UTCJun 9, 17:20 UTC1h 45m
2026-06-09 RYR98YP STN → MLA Jun 9, 12:35 UTCJun 9, 14:35 UTC2h 0m
2026-06-09 RYR5TL VLC → PSA Jun 9, 09:40 UTCJun 9, 11:05 UTC1h 25m
2026-06-09 RYR46CU PSA → VLC Jun 9, 07:20 UTCJun 9, 08:55 UTC1h 35m
2026-06-09 RYR4ZJ AHO → PSA Jun 9, 05:50 UTCJun 9, 06:35 UTC45m
2026-06-09 RYR7992 PSA → AHO Jun 9, 04:15 UTCJun 9, 04:55 UTC40m
2026-06-08 RYR6TE BRI → NRN Jun 8, 20:35 UTCJun 8, 21:30 UTC55m
2026-06-08 RYR100J BDS → TRN Jun 8, 18:35 UTCJun 8, 19:30 UTC55m
2026-06-08 RYR64VR MAD → IBZ Jun 8, 15:30 UTCJun 8, 17:35 UTC2h 5m
2026-06-08 RYR84LQ PSA → MAN Jun 8, 12:35 UTCJun 8, 14:35 UTC2h 0m
2026-06-08 RYR5NB VIE → BRE Jun 8, 10:25 UTCJun 8, 11:25 UTC1h 0m
2026-06-08 RYR761H PSA → BRI Jun 8, 08:25 UTCJun 8, 09:30 UTC1h 5m
2026-06-08 RYR2WF BLL → TRN Jun 8, 06:20 UTCJun 8, 07:20 UTC1h 0m
2026-06-08 RYR32RL STN → CGN Jun 8, 04:30 UTCJun 8, 05:20 UTC50m
2026-06-07 RYR5EA BGY → NAP Jun 7, 20:35 UTCJun 7, 21:35 UTC1h 0m
2026-06-07 RYR98KN PSA → PMO Jun 7, 18:55 UTCJun 7, 19:40 UTC45m
2026-06-07 RYR1RH DUB → BGY Jun 7, 17:00 UTCJun 7, 18:00 UTC1h 0m
2026-06-07 RYR76CW PSA → PMO Jun 7, 15:20 UTCJun 7, 16:15 UTC55m
2026-06-07 RYR7NF WRO → PSA Jun 7, 12:40 UTCJun 7, 14:10 UTC1h 30m
2026-06-07 RYR572J PSA → WRO Jun 7, 10:20 UTCJun 7, 11:45 UTC1h 25m
2026-06-07 RYR11BG WAW → PSA Jun 7, 07:40 UTCJun 7, 09:35 UTC1h 55m
2026-06-07 RYR61AD PSA → WAW Jun 7, 05:05 UTCJun 7, 06:45 UTC1h 40m
2026-06-06 RYR5YH BGY → STN Jun 6, 21:15 UTCJun 6, 22:20 UTC1h 5m
2026-06-06 RYR32PP PSA → SUF Jun 6, 19:40 UTCJun 6, 20:35 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-DWH page for operator, model, and routing details .

Mode-S 4CA56D frequently asked

What is Mode-S code 4CA56D?
4CA56D is an ICAO 24-bit transponder address. Allocated to Ireland. Assigned to EI-DWH.
Where is Mode-S 4CA56D registered?
Mode-S code 4CA56D is allocated to Ireland (IE). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 4CA56D broadcasting right now?
No active broadcast right now. Last signal was 3h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 4CA56D, octal 23122555, decimal 5,023,085.
What flights does 4CA56D operate?
Mode-S 4CA56D has broadcast 20 distinct callsigns, including RYR54FN, RYR29BA, RYR824, RYR6TX, RYR6RX.