Apparatus

Try JFK, AAL1290, BAW, or N225AN.

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 RYR17NT · 23,150 ft
Flights observed
326
Distinct callsigns
20
Country
IE
Last broadcast
1h ago

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
RYR7YX Ryanair 4 2026-05-12
RYR559X Ryanair 4 2026-05-12
RYR916W Ryanair 3 2026-05-27
RYR89YN Ryanair 3 2026-04-16
RYR82NW Ryanair 3 2026-04-20
RYR7HJ Ryanair 3 2026-04-15
RYR65PA Ryanair 3 2026-05-27
RYR64TN Ryanair 3 2026-05-26
RYR4DF - 3 2026-04-13
RYR3EQ Ryanair 3 2026-04-15
RYR2GJ Ryanair 3 2026-04-20
RYR22KC - 3 2026-04-13
RYR20ZE Ryanair 3 2026-05-26
RYR9RQ Ryanair 2 2026-05-30
RYR9MC - 2 2026-04-16
RYR9ED Ryanair 2 2026-04-19
RYR99TV Ryanair 2 2026-05-30
RYR8DU Ryanair 2 2026-04-15
RYR7PF Ryanair 2 2026-05-13
RYR78FG Ryanair 2 2026-04-18

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-05-30 RYR99TV IBZ → BCN May 30, 16:10 UTCMay 30, 16:40 UTC30m
2026-05-30 RYR1PK BCN → IBZ May 30, 14:10 UTCMay 30, 14:45 UTC35m
2026-05-30 RYR748H PEG → BCN May 30, 11:05 UTCMay 30, 12:30 UTC1h 25m
2026-05-30 RYR9RQ BER → MXP May 30, 09:00 UTCMay 30, 10:20 UTC1h 20m
2026-05-30 RYR28UR OPO → BCN May 30, 06:25 UTCMay 30, 07:45 UTC1h 20m
2026-05-30 RYR1CV DUB → KIR May 30, 04:00 UTCMay 30, 05:25 UTC1h 25m
2026-05-29 RYR2YR KRK → BRS May 29, 21:00 UTCMay 29, 23:00 UTC2h 0m
2026-05-29 RYR61NG REU → ORK May 29, 17:30 UTCMay 29, 19:45 UTC2h 15m
2026-05-29 RYR96DK PMI → BCN May 29, 15:55 UTCMay 29, 16:30 UTC35m
2026-05-29 RYR2495 BCN → PMI May 29, 14:25 UTCMay 29, 14:50 UTC25m
2026-05-29 RYR68QK BGY → BCN May 29, 11:35 UTCMay 29, 12:50 UTC1h 15m
2026-05-29 RYR9WA DUB → MAN May 29, 09:10 UTCMay 29, 10:25 UTC1h 15m
2026-05-29 RYR7VB BLQ → LPA May 29, 06:35 UTCMay 29, 08:00 UTC1h 25m
2026-05-29 RYR86FZ BCN → FCO May 29, 04:05 UTCMay 29, 05:30 UTC1h 25m
2026-05-28 RYR95FC LIS → BCN May 28, 19:20 UTCMay 28, 20:50 UTC1h 30m
2026-05-28 RYR647X BCN → LIS May 28, 16:55 UTCMay 28, 18:20 UTC1h 25m
2026-05-28 RYR42TA LPL → BCN May 28, 13:45 UTCMay 28, 15:40 UTC1h 55m
2026-05-28 RYR90RR SVQ → TRN May 28, 10:35 UTCMay 28, 12:40 UTC2h 5m
2026-05-28 RYR7EM DUB → CLJ May 28, 07:05 UTCMay 28, 08:40 UTC1h 35m
2026-05-28 RYR9KG EGC → STN May 28, 04:30 UTCMay 28, 06:15 UTC1h 45m
2026-05-27 RYR916W CGN → BCN May 27, 21:25 UTCMay 27, 23:10 UTC1h 45m
2026-05-27 RYR65PA BCN → CGN May 27, 18:35 UTCMay 27, 20:20 UTC1h 45m
2026-05-27 RYR72NK ABZ → ALC May 27, 16:30 UTCMay 27, 17:35 UTC1h 5m
2026-05-27 RYR161N BCN → MXP May 27, 14:15 UTCMay 27, 15:20 UTC1h 5m
2026-05-27 RYR4WG FAO → STN May 27, 11:10 UTCMay 27, 12:30 UTC1h 20m
2026-05-27 RYR304P BCN → SVQ May 27, 09:05 UTCMay 27, 10:20 UTC1h 15m
2026-05-27 RYR748H PEG → BCN May 27, 06:15 UTCMay 27, 07:40 UTC1h 25m
2026-05-27 RYR9RQ BER → MXP May 27, 03:59 UTCMay 27, 05:24 UTC1h 25m
2026-05-26 RYR6DZ VLC → STN May 26, 21:29 UTCMay 26, 21:59 UTC30m
2026-05-26 RYR99PV VCE → EDI May 26, 20:05 UTCMay 26, 20:34 UTC30m
2026-05-26 RYR76VT DUB → BCN May 26, 16:50 UTCMay 26, 18:59 UTC2h 10m
2026-05-26 RYR44MH BCN → DUB May 26, 13:40 UTCMay 26, 15:45 UTC2h 5m
2026-05-26 RYR20ZE STN → BCN May 26, 10:20 UTCMay 26, 12:14 UTC1h 55m
2026-05-26 RYR64TN BCN → STN May 26, 07:34 UTCMay 26, 09:19 UTC1h 45m
2026-05-26 RYR3029 IBZ → BCN May 26, 05:40 UTCMay 26, 06:20 UTC40m
2026-05-26 RYR3028 BCN → IBZ May 26, 04:10 UTCMay 26, 04:50 UTC40m
2026-05-25 RYR66CW MAH → BCN May 25, 21:45 UTCMay 25, 22:15 UTC30m
2026-05-25 RYR7509 BCN → MAH May 25, 20:19 UTCMay 25, 20:55 UTC35m
2026-05-25 RYR37KT DUB → BCN May 25, 17:05 UTCMay 25, 19:20 UTC2h 15m
2026-05-25 RYR66YZ VIE → DUB May 25, 13:40 UTCMay 25, 16:05 UTC2h 25m
2026-05-25 RYR79DW DUB → VIE May 25, 10:15 UTCMay 25, 12:35 UTC2h 20m
2026-05-25 RYR2PN NCL → MAH May 25, 08:35 UTCMay 25, 09:15 UTC40m
2026-05-25 RYR3B CAG → BGY May 25, 07:10 UTCMay 25, 07:45 UTC35m
2026-05-24 RYR77GB MAN → DUB May 24, 23:00 UTCMay 24, 23:30 UTC30m
2026-05-24 RYR4KN DUB → FRA May 24, 20:20 UTCMay 24, 20:55 UTC35m
2026-05-24 RYR2NQ BDS → VCE May 24, 18:40 UTCMay 24, 19:30 UTC50m
2026-05-24 RYR2CK EIN → FAO May 24, 16:15 UTCMay 24, 17:25 UTC1h 10m
2026-05-24 RYR82VQ PSA → DUB May 24, 13:05 UTCMay 24, 15:15 UTC2h 10m
2026-05-24 RYR30WP DUB → PSA May 24, 09:40 UTCMay 24, 11:55 UTC2h 15m
2026-05-24 RYR58HP - May 24, 07:45 UTCMay 24, 08:35 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-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 RYR7YX, RYR559X, RYR916W, RYR89YN, RYR82NW.