Apparatus

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sensors Mode-S transponder

4CA2C1

ICAO 24-bit transponder address · allocated to Ireland

Currently assigned to EI-DLD · BOEING 737-800

Hex
4CA2C1
Octal
23121301
Decimal
5,022,401
Country
IE
Tail
EI-DLD
Type
B738
No current signal · last broadcast 51m ago
Flights observed
294
Distinct callsigns
20
Country
IE
Last broadcast
51m ago

Last known position

Most recent position reported by Mode-S 4CA2C1.

Country allocation

The ICAO 24-bit address 4CA2C1 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
RYR63DQ - 3 2026-04-13
RYR4PK Ryanair 3 2026-05-01
RYR18EV - 3 2026-04-13
RYR8PB - 2 2026-04-14
RYR8HX Ryanair 2 2026-05-16
RYR8GM Ryanair 2 2026-04-16
RYR88VP Ryanair 2 2026-04-17
RYR88NB Ryanair 2 2026-05-19
RYR87UP Ryanair 2 2026-04-26
RYR7SG Ryanair 2 2026-05-27
RYR7PR - 2 2026-04-17
RYR7CJ Ryanair 2 2026-05-01
RYR744U - 2 2026-04-14
RYR6JX - 2 2026-04-13
RYR695G Ryanair 2 2026-04-18
RYR611A Ryanair 2 2026-05-16
RYR5YG - 2 2026-04-14
RYR4UY Ryanair 2 2026-05-12
RYR4NU Ryanair 2 2026-04-15
RYR4DB Ryanair 2 2026-05-27

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-05-30 RYR77GB MAN → DUB May 30, 05:55 UTCMay 30, 06:15 UTC20m
2026-05-29 RYR63PR CRL → BLQ May 29, 19:50 UTCMay 29, 22:20 UTC2h 30m
2026-05-29 RYR3VD EDI → BER May 29, 15:15 UTCMay 29, 17:50 UTC2h 35m
2026-05-29 RYR390A EIN → MAN May 29, 12:55 UTCMay 29, 14:00 UTC1h 5m
2026-05-29 RYR6CU FCO → PMI May 29, 11:05 UTCMay 29, 12:05 UTC1h 0m
2026-05-29 RYR56VX NOC → MAN May 29, 09:20 UTCMay 29, 10:10 UTC50m
2026-05-29 RYR3TX SOF → EIN May 29, 07:30 UTCMay 29, 08:15 UTC45m
2026-05-28 RYR78DW AGP → MAN May 28, 20:10 UTCMay 28, 22:45 UTC2h 35m
2026-05-28 RYR30EW MAN → AGP May 28, 16:35 UTCMay 28, 19:05 UTC2h 30m
2026-05-28 RYR6AR STN → KGS May 28, 12:50 UTCMay 28, 15:15 UTC2h 25m
2026-05-28 RYR6RP DUB → GOT May 28, 09:35 UTCMay 28, 11:40 UTC2h 5m
2026-05-28 RYR1QD STN → BZG May 28, 07:40 UTCMay 28, 08:35 UTC55m
2026-05-28 RYR22KC FEZ → NTE May 28, 05:50 UTCMay 28, 06:40 UTC50m
2026-05-27 RYR7SG BCN → PIK May 27, 18:30 UTCMay 27, 21:20 UTC2h 50m
2026-05-27 RYR4DB DUB → LGW May 27, 15:10 UTCMay 27, 17:25 UTC2h 15m
2026-05-27 RYR1QD STN → BZG May 27, 13:10 UTCMay 27, 14:05 UTC55m
2026-05-27 RYR22KC FEZ → NTE May 27, 11:35 UTCMay 27, 12:25 UTC50m
2026-05-27 RYR3RK STN → BCN May 27, 08:50 UTCMay 27, 10:35 UTC1h 45m
2026-05-27 RYR717M MAN → BER May 27, 06:29 UTCMay 27, 08:00 UTC1h 30m
2026-05-26 RYR26UL BRI → TRN May 26, 21:25 UTCMay 26, 22:15 UTC50m
2026-05-26 RYR3H KRK → BCN May 26, 19:55 UTCMay 26, 20:45 UTC50m
2026-05-26 RYR46XX BGY → MAN May 26, 17:30 UTCMay 26, 19:15 UTC1h 45m
2026-05-26 RYR5HT MAN → BGY May 26, 14:20 UTCMay 26, 16:05 UTC1h 45m
2026-05-26 RYR7SG BCN → PIK May 26, 10:20 UTCMay 26, 13:04 UTC2h 45m
2026-05-26 RYR4DB DUB → LGW May 26, 07:24 UTCMay 26, 09:29 UTC2h 5m
2026-05-25 RYR70WZ VLC → MAN May 25, 20:59 UTCMay 25, 23:04 UTC2h 5m
2026-05-25 RYR3SL BCN → BGY May 25, 17:40 UTCMay 25, 19:54 UTC2h 14m
2026-05-25 RYR506G VIE → MAN May 25, 14:15 UTCMay 25, 16:15 UTC2h 0m
2026-05-25 RYR20FV MAN → VIE May 25, 11:20 UTCMay 25, 13:20 UTC2h 0m
2026-05-25 RYR4KN DUB → FRA May 25, 09:55 UTCMay 25, 10:30 UTC35m
2026-05-24 RYR62LK DUB → EMA May 24, 20:45 UTCMay 24, 21:25 UTC40m
2026-05-24 RYR683W IBZ → DUB May 24, 17:30 UTCMay 24, 19:50 UTC2h 20m
2026-05-24 RYR56FX DUB → IBZ May 24, 14:05 UTCMay 24, 16:30 UTC2h 25m
2026-05-24 RYR4P BER → AGP May 24, 09:50 UTCMay 24, 11:45 UTC1h 55m
2026-05-24 RYR9776 DUB → FNI May 24, 06:55 UTCMay 24, 08:55 UTC2h 0m
2026-05-23 RYR5TG CRL → ARN May 23, 21:05 UTCMay 23, 23:40 UTC2h 35m
2026-05-23 RYR7132 DUB → FAO May 23, 17:45 UTCMay 23, 20:10 UTC2h 26m
2026-05-23 RYR3CV MAD → MXP May 23, 16:15 UTCMay 23, 16:55 UTC40m
2026-05-23 RYR33GT MAN → BUD May 23, 14:55 UTCMay 23, 15:25 UTC30m
2026-05-23 RYR6TY GLA → DUB May 23, 13:25 UTCMay 23, 14:00 UTC35m
2026-05-23 RYR6LT BER → STN May 23, 12:00 UTCMay 23, 12:35 UTC35m
2026-05-23 RYR83UV CCF → MAN May 23, 09:30 UTCMay 23, 11:10 UTC1h 40m
2026-05-23 RYR7VE DUB → BIQ May 23, 05:50 UTCMay 23, 07:30 UTC1h 40m
2026-05-22 RYR72TB NCE → DUB May 22, 20:00 UTCMay 22, 22:05 UTC2h 5m
2026-05-22 RYR42QV DUB → NCE May 22, 16:40 UTCMay 22, 18:45 UTC2h 5m
2026-05-22 RYR7901 FMM → BNX May 22, 14:40 UTCMay 22, 15:20 UTC40m
2026-05-22 RYR5151 DUB → GLA May 22, 13:10 UTCMay 22, 13:45 UTC35m
2026-05-22 RYR12MM LGW → DUB May 22, 10:55 UTCMay 22, 11:50 UTC55m
2026-05-22 RYR28JB DUB → LGW May 22, 08:50 UTCMay 22, 09:50 UTC1h 0m
2026-05-22 RYR2PN NCL → MAH May 22, 06:30 UTCMay 22, 07:20 UTC50m

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

Mode-S 4CA2C1 frequently asked

What is Mode-S code 4CA2C1?
4CA2C1 is an ICAO 24-bit transponder address. Allocated to Ireland. Assigned to EI-DLD.
Where is Mode-S 4CA2C1 registered?
Mode-S code 4CA2C1 is allocated to Ireland (IE). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 4CA2C1 broadcasting right now?
No active broadcast right now. Last signal was 51m ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 4CA2C1, octal 23121301, decimal 5,022,401.
What flights does 4CA2C1 operate?
Mode-S 4CA2C1 has broadcast 20 distinct callsigns, including RYR63DQ, RYR4PK, RYR18EV, RYR8PB, RYR8HX.