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 2h ago
Flights observed
609
Distinct callsigns
20
Country
IE
Last broadcast
2h ago

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
RYR1VW Ryanair 4 2026-05-25
RYR1GX Ryanair 4 2026-05-25

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-13 RYR33WW - Jul 13, 20:10 UTCJul 13, 23:25 UTC3h 15m
2026-07-13 RYR4YE - Jul 13, 16:30 UTCJul 13, 19:15 UTC2h 45m
2026-07-13 RYR51MC - Jul 13, 13:15 UTCJul 13, 15:20 UTC2h 5m
2026-07-13 RYR48TD - Jul 13, 09:15 UTCJul 13, 11:40 UTC2h 25m
2026-07-13 RYR19HB - Jul 13, 05:45 UTCJul 13, 07:55 UTC2h 10m
2026-07-12 RYR899T - Jul 12, 21:35 UTCJul 12, 22:55 UTC1h 20m
2026-07-12 RYR5YX - Jul 12, 19:05 UTCJul 12, 20:20 UTC1h 15m
2026-07-12 RYR91CA - Jul 12, 16:10 UTCJul 12, 18:10 UTC2h 0m
2026-07-12 RYR47FQ - Jul 12, 12:55 UTCJul 12, 14:50 UTC1h 55m
2026-07-12 RYR27ZC - Jul 12, 09:30 UTCJul 12, 11:20 UTC1h 50m
2026-07-12 RYR48XY - Jul 12, 07:01 UTCJul 12, 08:30 UTC1h 30m
2026-07-12 RYR93QL - Jul 12, 04:55 UTCJul 12, 06:20 UTC1h 25m
2026-07-11 RYR5PA - Jul 11, 19:20 UTCJul 11, 20:30 UTC1h 10m
2026-07-11 RYR6261 - Jul 11, 16:55 UTCJul 11, 18:00 UTC1h 5m
2026-07-11 RYR5KY PEG → CRL Jul 11, 14:10 UTCJul 11, 15:50 UTC1h 40m
2026-07-11 RYR75SE CRL → PEG Jul 11, 11:45 UTCJul 11, 13:20 UTC1h 35m
2026-07-11 RYR2RG - Jul 11, 08:15 UTCJul 11, 10:45 UTC2h 30m
2026-07-11 RYR515T - Jul 11, 05:05 UTCJul 11, 07:15 UTC2h 10m
2026-07-10 RYR105V - Jul 10, 18:15 UTCJul 10, 19:35 UTC1h 20m
2026-07-10 RYR92NU - Jul 10, 15:55 UTCJul 10, 17:15 UTC1h 20m
2026-07-10 RYR625P - Jul 10, 13:00 UTCJul 10, 14:45 UTC1h 45m
2026-07-10 RYR4708 - Jul 10, 10:00 UTCJul 10, 11:45 UTC1h 45m
2026-07-10 RYR8044 - Jul 10, 07:55 UTCJul 10, 09:15 UTC1h 20m
2026-07-10 RYR8045 - Jul 10, 06:05 UTCJul 10, 07:05 UTC1h 0m
2026-07-09 RYR1BM SKG → CRL Jul 9, 17:55 UTCJul 9, 20:40 UTC2h 45m
2026-07-09 RYR80FT - Jul 9, 14:55 UTCJul 9, 17:10 UTC2h 15m
2026-07-09 RYR8AU MAD → CRL Jul 9, 11:40 UTCJul 9, 13:20 UTC1h 40m
2026-07-09 RYR36TZ - Jul 9, 08:30 UTCJul 9, 10:25 UTC1h 55m
2026-07-09 RYR93TK TRN → CRL Jul 9, 06:30 UTCJul 9, 07:35 UTC1h 5m
2026-07-09 RYR6RK - Jul 9, 04:45 UTCJul 9, 05:50 UTC1h 5m
2026-07-08 RYR498R LIS → CRL Jul 8, 17:40 UTCJul 8, 19:55 UTC2h 15m
2026-07-08 RYR29TL - Jul 8, 14:30 UTCJul 8, 16:50 UTC2h 20m
2026-07-08 RYR7H - Jul 8, 12:15 UTCJul 8, 13:30 UTC1h 15m
2026-07-08 RYR12YP - Jul 8, 10:00 UTCJul 8, 11:10 UTC1h 10m
2026-07-08 RYR1MC REU → CRL Jul 8, 07:25 UTCJul 8, 09:05 UTC1h 40m
2026-07-08 RYR39BP - Jul 8, 05:00 UTCJul 8, 06:35 UTC1h 35m
2026-07-07 RYR3ZM - Jul 7, 14:20 UTCJul 7, 17:50 UTC3h 30m
2026-07-07 RYR69WR - Jul 7, 10:15 UTCJul 7, 13:15 UTC3h 0m
2026-07-07 RYR7WU - Jul 7, 07:35 UTCJul 7, 08:55 UTC1h 20m
2026-07-07 RYR56DD CRL → TSF Jul 7, 05:30 UTCJul 7, 06:40 UTC1h 10m
2026-07-06 RYR2RG - Jul 6, 18:05 UTCJul 6, 20:35 UTC2h 30m
2026-07-06 RYR4HH - Jul 6, 14:25 UTCJul 6, 16:55 UTC2h 30m
2026-07-06 RYR9HC - Jul 6, 12:40 UTCJul 6, 13:30 UTC50m
2026-07-06 RYR76JC - Jul 6, 10:35 UTCJul 6, 11:45 UTC1h 10m
2026-07-06 RYR82JL HAM → STN Jul 6, 08:40 UTCJul 6, 09:45 UTC1h 5m
2026-07-06 RYR45TM - Jul 6, 06:25 UTCJul 6, 07:30 UTC1h 5m
2026-07-05 RYR8JV HEL → STN Jul 5, 20:40 UTCJul 5, 23:05 UTC2h 25m
2026-07-05 RYR9145 STN → HEL Jul 5, 17:20 UTCJul 5, 19:45 UTC2h 25m
2026-07-05 RYR29AM - Jul 5, 14:20 UTCJul 5, 15:45 UTC1h 25m
2026-07-05 RYR6WD - Jul 5, 12:00 UTCJul 5, 13:20 UTC1h 20m

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 2h ago.
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.