Apparatus

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sensors Mode-S transponder

4CA245

ICAO 24-bit transponder address · allocated to Ireland

Currently assigned to EI-DCO · BOEING 737-800

Hex
4CA245
Octal
23121105
Decimal
5,022,277
Country
IE
Tail
EI-DCO
Type
B738
No current signal · last broadcast Jul 26, 20:55 UTC
Flights observed
691
Distinct callsigns
20
Country
IE
Last broadcast
Jul 26, 20:55 UTC

Last known position

Most recent position reported by Mode-S 4CA245.

Country allocation

The ICAO 24-bit address 4CA245 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
RYR8XK Ryanair 6 2026-05-31
RYR8BF Ryanair 6 2026-05-24
RYR81BC Ryanair 6 2026-05-24
RYR61PH Ryanair 6 2026-05-27
RYR4VL Ryanair 6 2026-05-31
RYR1YW Ryanair 6 2026-05-27
RYR87AY Ryanair 5 2026-05-26
RYR6RK - 5 2026-07-09
RYR6GH Ryanair 5 2026-05-26
RYR5MH Ryanair 5 2026-05-27
RYR2FL Ryanair 5 2026-05-26
RYR28SK Ryanair 5 2026-05-27
RYR9PK Ryanair 4 2026-05-13
RYR93TK - 4 2026-07-09
RYR7CJ Ryanair 4 2026-05-31
RYR67KN Ryanair 4 2026-05-31
RYR4PK Ryanair 4 2026-05-31
RYR47YB Ryanair 4 2026-05-26
RYR3XM - 4 2026-07-16
RYR1VW Ryanair 4 2026-05-25

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 RYR98EE BCN → DUB Jul 26, 18:30 UTCJul 26, 20:50 UTC2h 20m
2026-07-26 RYR6DZ VLC → STN Jul 26, 16:45 UTCJul 26, 17:15 UTC30m
2026-07-26 RYR99PV VCE → EDI Jul 26, 15:15 UTCJul 26, 15:45 UTC30m
2026-07-26 RYR36PL EDI → BCN Jul 26, 11:50 UTCJul 26, 13:55 UTC2h 5m
2026-07-26 RYR73KY BCN → EDI Jul 26, 08:00 UTCJul 26, 10:35 UTC2h 35m
2026-07-26 RYR1343 PMI → BCN Jul 26, 05:40 UTCJul 26, 06:25 UTC45m
2026-07-26 RYR4PG ZAZ → STN Jul 26, 04:10 UTCJul 26, 04:40 UTC30m
2026-07-25 RYR58QK MXP → BCN Jul 25, 22:20 UTCJul 25, 23:35 UTC1h 15m
2026-07-25 RYR3FA PMO → MXP Jul 25, 20:20 UTCJul 25, 21:25 UTC1h 5m
2026-07-25 RYR50ZJ FCO → BCN Jul 25, 17:50 UTCJul 25, 19:15 UTC1h 25m
2026-07-25 RYR62NA BCN → FCO Jul 25, 15:05 UTCJul 25, 16:15 UTC1h 10m
2026-07-25 RYR50GQ FAO → BCN Jul 25, 12:25 UTCJul 25, 13:40 UTC1h 15m
2026-07-25 RYR3SP STN → MRS Jul 25, 09:40 UTCJul 25, 11:20 UTC1h 40m
2026-07-25 RYR94VL TRS → BCN Jul 25, 06:45 UTCJul 25, 08:30 UTC1h 45m
2026-07-25 RYR78HC BCN → TRS Jul 25, 04:25 UTCJul 25, 05:50 UTC1h 25m
2026-07-24 RYR695G AGP → BCN Jul 24, 17:50 UTCJul 24, 18:50 UTC1h 0m
2026-07-24 RYR15FK BCN → AGP Jul 24, 15:30 UTCJul 24, 16:55 UTC1h 25m
2026-07-24 RYR20ZE STN → BCN Jul 24, 12:40 UTCJul 24, 14:30 UTC1h 50m
2026-07-24 RYR51TU GOA → STN Jul 24, 08:50 UTCJul 24, 10:30 UTC1h 40m
2026-07-24 RYR284X STN → GOA Jul 24, 06:00 UTCJul 24, 07:30 UTC1h 30m
2026-07-23 RYR82JL TIA → CIA Jul 23, 20:30 UTCJul 23, 21:40 UTC1h 10m
2026-07-23 RYR45TM STN → HAM Jul 23, 18:20 UTCJul 23, 19:25 UTC1h 5m
2026-07-23 RYR8MK SVQ → OPO Jul 23, 14:45 UTCJul 23, 16:55 UTC2h 10m
2026-07-23 RYR3SM MRS → NTE Jul 23, 11:25 UTCJul 23, 14:00 UTC2h 35m
2026-07-23 RYR120Z - Jul 23, 08:25 UTCJul 23, 10:15 UTC1h 50m
2026-07-23 RYR5996 STN → MAD Jul 23, 05:20 UTCJul 23, 07:15 UTC1h 55m
2026-07-22 RYR71DT - Jul 22, 21:40 UTCJul 22, 23:40 UTC2h 0m
2026-07-22 RYR1MN TFS → WMI Jul 22, 19:05 UTCJul 22, 20:50 UTC1h 45m
2026-07-22 RYR2907 JTR → STN Jul 22, 14:30 UTCJul 22, 18:15 UTC3h 45m
2026-07-22 RYR42CH - Jul 22, 11:10 UTCJul 22, 13:20 UTC2h 10m
2026-07-21 RYR776U IBZ → AGP Jul 21, 22:00 UTCJul 21, 23:15 UTC1h 15m
2026-07-21 RYR3ZF - Jul 21, 20:20 UTCJul 21, 21:10 UTC50m
2026-07-21 RYR51MW PAD → AGP Jul 21, 16:25 UTCJul 21, 19:05 UTC2h 40m
2026-07-21 RYR9872 AGP → PAD Jul 21, 12:50 UTCJul 21, 15:35 UTC2h 45m
2026-07-21 RYR9JW LPL → ALC Jul 21, 09:10 UTCJul 21, 11:40 UTC2h 30m
2026-07-21 RYR4KR AGP → EIN Jul 21, 05:30 UTCJul 21, 08:05 UTC2h 35m
2026-07-20 RYR4461 FEZ → AGP Jul 20, 22:20 UTCJul 20, 22:55 UTC35m
2026-07-20 RYR81NH AGP → FEZ Jul 20, 20:55 UTCJul 20, 21:20 UTC25m
2026-07-20 RYR9JW - Jul 20, 17:05 UTCJul 20, 19:40 UTC2h 35m
2026-07-20 RYR4KR - Jul 20, 13:35 UTCJul 20, 15:55 UTC2h 20m
2026-07-20 RYR718U DUB → RVN Jul 20, 08:45 UTCJul 20, 12:25 UTC3h 40m
2026-07-20 RYR7011 NYO → WMI Jul 20, 04:30 UTCJul 20, 07:25 UTC2h 55m
2026-07-19 RYR31DM - Jul 19, 21:45 UTCJul 19, 22:50 UTC1h 5m
2026-07-19 RYR89HZ BCN → IBZ Jul 19, 20:10 UTCJul 19, 20:45 UTC35m
2026-07-19 RYR2897 PMI → BCN Jul 19, 18:40 UTCJul 19, 19:15 UTC35m
2026-07-19 RYR632Q BCN → PMI Jul 19, 17:15 UTCJul 19, 17:40 UTC25m
2026-07-19 RYR88TM - Jul 19, 14:10 UTCJul 19, 15:30 UTC1h 20m
2026-07-19 RYR94ZG - Jul 19, 11:25 UTCJul 19, 12:35 UTC1h 10m
2026-07-19 RYR3147 OUD → BCN Jul 19, 08:40 UTCJul 19, 10:05 UTC1h 25m
2026-07-19 RYR3146 - Jul 19, 06:25 UTCJul 19, 07:40 UTC1h 15m

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

Mode-S 4CA245 frequently asked

What is Mode-S code 4CA245?
4CA245 is an ICAO 24-bit transponder address. Allocated to Ireland. Assigned to EI-DCO.
Where is Mode-S 4CA245 registered?
Mode-S code 4CA245 is allocated to Ireland (IE). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 4CA245 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 20:55 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 4CA245, octal 23121105, decimal 5,022,277.
What flights does 4CA245 operate?
Mode-S 4CA245 has broadcast 20 distinct callsigns, including RYR8XK, RYR8BF, RYR81BC, RYR61PH, RYR4VL.