Apparatus

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sensors Mode-S transponder

4CA27C

ICAO 24-bit transponder address · allocated to Ireland

Currently assigned to EI-DHO · BOEING 737-800

Hex
4CA27C
Octal
23121174
Decimal
5,022,332
Country
IE
Tail
EI-DHO
Type
B738
Broadcasting now · callsign RYR5275 · 25,550 ft
Flights observed
691
Distinct callsigns
20
Country
IE
Last broadcast
Jul 26, 22:10 UTC

Current position

4CA27C is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address 4CA27C 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
RYR99TV Ryanair 5 2026-06-12
RYR1PK Ryanair 5 2026-06-12
RYR9RA Ryanair 4 2026-07-26
RYR7YX Ryanair 4 2026-05-12
RYR76VT - 4 2026-06-15
RYR64TN Ryanair 4 2026-06-12
RYR559X Ryanair 4 2026-05-12
RYR39ED Ryanair 4 2026-07-26
RYR20ZE Ryanair 4 2026-06-12
RYR9KG - 3 2026-06-16
RYR99ZG Ryanair 3 2026-07-25
RYR916W Ryanair 3 2026-05-27
RYR8DU - 3 2026-07-06
RYR89YN Ryanair 3 2026-04-16
RYR82NW Ryanair 3 2026-04-20
RYR7HJ Ryanair 3 2026-04-15
RYR7EM - 3 2026-06-16
RYR6882 Ryanair 3 2026-06-09
RYR65PA Ryanair 3 2026-05-27
RYR61NG Ryanair 3 2026-06-15

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 RYR83SL PRG → KRK Jul 26, 21:10 UTCJul 26, 22:10 UTC1h 0m
2026-07-26 RYR70QN TRS → OLB Jul 26, 19:25 UTCJul 26, 20:10 UTC45m
2026-07-26 RYR90EK SUF → TRS Jul 26, 17:10 UTCJul 26, 18:30 UTC1h 20m
2026-07-26 RYR5836 TRS → SUF Jul 26, 14:30 UTCJul 26, 15:40 UTC1h 10m
2026-07-26 RYR9319 DUB → TRS Jul 26, 11:20 UTCJul 26, 13:35 UTC2h 15m
2026-07-26 RYR2XA LBA → DUB Jul 26, 07:30 UTCJul 26, 10:15 UTC2h 45m
2026-07-26 RYR9RA SKG → HHN Jul 26, 05:55 UTCJul 26, 06:45 UTC51m
2026-07-26 RYR39ED TRS → NAP Jul 26, 04:10 UTCJul 26, 04:55 UTC45m
2026-07-25 RYR99ZG STN → TRS Jul 25, 19:55 UTCJul 25, 21:35 UTC1h 40m
2026-07-25 RYR27JN TRS → STN Jul 25, 17:15 UTCJul 25, 19:05 UTC1h 50m
2026-07-25 RYR60PR BRI → TRS Jul 25, 15:35 UTCJul 25, 16:30 UTC55m
2026-07-25 RYR6HL DUB → CRL Jul 25, 13:40 UTCJul 25, 14:35 UTC55m
2026-07-25 RYR78ZG BDS → TRS Jul 25, 11:00 UTCJul 25, 12:05 UTC1h 5m
2026-07-25 RYR4WD BLQ → STN Jul 25, 09:00 UTCJul 25, 10:00 UTC1h 0m
2026-07-25 RYR6788 BVA → TRS Jul 25, 06:55 UTCJul 25, 08:15 UTC1h 20m
2026-07-25 RYR6789 TRS → BVA Jul 25, 04:20 UTCJul 25, 05:45 UTC1h 25m
2026-07-24 RYR99ZG STN → TRS Jul 24, 19:10 UTCJul 24, 20:45 UTC1h 35m
2026-07-24 RYR27JN TRS → STN Jul 24, 16:10 UTCJul 24, 18:00 UTC1h 50m
2026-07-24 RYR60PR BRI → TRS Jul 24, 14:05 UTCJul 24, 15:05 UTC1h 0m
2026-07-24 RYR6HL DUB → CRL Jul 24, 12:05 UTCJul 24, 13:00 UTC55m
2026-07-24 RYR9RA SKG → HHN Jul 24, 10:35 UTCJul 24, 11:30 UTC55m
2026-07-24 RYR39ED TRS → NAP Jul 24, 08:05 UTCJul 24, 08:55 UTC50m
2026-07-24 RYR3342 PRG → TRS Jul 24, 05:55 UTCJul 24, 06:50 UTC55m
2026-07-24 RYR3343 TRS → PRG Jul 24, 04:10 UTCJul 24, 05:05 UTC55m
2026-07-23 RYR99ZG STN → TRS Jul 23, 20:25 UTCJul 23, 22:00 UTC1h 35m
2026-07-23 RYR27JN TRS → STN Jul 23, 17:45 UTCJul 23, 19:30 UTC1h 45m
2026-07-23 RYR3UR CTA → VCE Jul 23, 15:50 UTCJul 23, 17:05 UTC1h 15m
2026-07-23 RYR4PN TLL → BGY Jul 23, 13:35 UTCJul 23, 14:40 UTC1h 5m
2026-07-23 RYR9RA SKG → HHN Jul 23, 11:20 UTCJul 23, 12:50 UTC1h 30m
2026-07-23 RYR39ED TRS → NAP Jul 23, 09:20 UTCJul 23, 10:10 UTC50m
2026-07-23 RYR358T - Jul 23, 06:50 UTCJul 23, 08:30 UTC1h 40m
2026-07-23 RYR3695 TRS → MLA Jul 23, 04:35 UTCJul 23, 06:05 UTC1h 30m
2026-07-22 RYR9RA SKG → HHN Jul 22, 19:35 UTCJul 22, 20:30 UTC55m
2026-07-22 RYR39ED TRS → NAP Jul 22, 17:40 UTCJul 22, 18:20 UTC40m
2026-07-22 RYR907P - Jul 22, 16:05 UTCJul 22, 17:00 UTC55m
2026-07-22 RYR5649 - Jul 22, 13:25 UTCJul 22, 14:10 UTC45m
2026-07-21 RYR4009 RAK → SVQ Jul 21, 20:50 UTCJul 21, 21:50 UTC1h 0m
2026-07-21 RYR9334 GRO → BRS Jul 21, 18:05 UTCJul 21, 19:45 UTC1h 40m
2026-07-21 RYR63MC RAK → BCN Jul 21, 14:55 UTCJul 21, 16:40 UTC1h 45m
2026-07-21 RYR3XF BVA → FEZ Jul 21, 10:20 UTCJul 21, 13:00 UTC2h 40m
2026-07-21 RYR4407 RAK → XCR Jul 21, 06:35 UTCJul 21, 09:00 UTC2h 25m
2026-07-20 RYR29PG BCN → RAK Jul 20, 23:15 UTCJul 21, 01:15 UTC1h 59m
2026-07-20 RYR9AY TFS → VIE Jul 20, 19:15 UTCJul 20, 21:25 UTC2h 10m
2026-07-20 RYR6293 AGP → RAK Jul 20, 17:25 UTCJul 20, 18:05 UTC40m
2026-07-20 RYR6SU BRS → MRS Jul 20, 15:10 UTCJul 20, 16:10 UTC1h 0m
2026-07-20 RYR62UC EIN → SKG Jul 20, 11:30 UTCJul 20, 12:45 UTC1h 15m
2026-07-20 RYR61VR - Jul 20, 07:55 UTCJul 20, 10:10 UTC2h 15m
2026-07-20 RYR9JF ACE → CRL Jul 20, 04:30 UTCJul 20, 06:35 UTC2h 5m
2026-07-19 RYR7573 - Jul 19, 23:00 UTCJul 19, 23:30 UTC30m
2026-07-19 RYR3FB - Jul 19, 21:35 UTCJul 19, 22:05 UTC30m

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

Mode-S 4CA27C frequently asked

What is Mode-S code 4CA27C?
4CA27C is an ICAO 24-bit transponder address. Allocated to Ireland. Assigned to EI-DHO.
Where is Mode-S 4CA27C registered?
Mode-S code 4CA27C is allocated to Ireland (IE). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 4CA27C broadcasting right now?
Yes. Mode-S 4CA27C is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 4CA27C, octal 23121174, decimal 5,022,332.
What flights does 4CA27C operate?
Mode-S 4CA27C has broadcast 20 distinct callsigns, including RYR99TV, RYR1PK, RYR9RA, RYR7YX, RYR76VT.