sensors Mode-S transponder

4CAE4A

ICAO 24-bit transponder address · allocated to Ireland

Currently assigned to EI-IHX · BOEING 737 MAX 8

Hex
4CAE4A
Octal
23127112
Decimal
5,025,354
Country
IE
Tail
EI-IHX
Type
B38M
Broadcasting now · callsign RYR5089 · 20,650 ft
Flights observed
17
Distinct callsigns
11
Country
IE
Last broadcast
20h ago

Current position

4CAE4A is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address 4CAE4A 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 11 distinct

Callsign Airline Flights Last seen
RYR28CC - 4 2026-04-14
RYR6UR - 2 2026-04-13
RYR58UE - 2 2026-04-14
RYR4UL Ryanair 2 2026-04-13
RYR9TF - 1 2026-04-13
RYR98SG - 1 2026-04-13
RYR8WH - 1 2026-04-13
RYR7JU - 1 2026-04-14
RYR79RU - 1 2026-04-13
RYR4D - 1 2026-04-13
RYR23VX - 1 2026-04-12

Recent flights last 17

DateFlightRouteTakeoffLandingDuration
2026-04-14 RYR28CC - Apr 14, 09:10 UTCApr 14, 10:40 UTC1h 30m
2026-04-14 RYR28CC - Apr 14, 08:55 UTCApr 14, 09:05 UTC10m
2026-04-14 RYR58UE - Apr 14, 07:10 UTCApr 14, 07:55 UTC45m
2026-04-14 RYR58UE - Apr 14, 06:45 UTCApr 14, 07:10 UTC25m
2026-04-14 RYR7JU - Apr 14, 05:15 UTCApr 14, 05:25 UTC10m
2026-04-13 RYR8WH - Apr 13, 20:10 UTCApr 13, 22:25 UTC2h 15m
2026-04-13 RYR9TF - Apr 13, 16:40 UTCApr 13, 19:10 UTC2h 30m
2026-04-13 RYR79RU - Apr 13, 14:50 UTCApr 13, 15:40 UTC50m
2026-04-13 RYR4D - Apr 13, 13:25 UTCApr 13, 13:50 UTC25m
2026-04-13 RYR6UR - Apr 13, 11:55 UTCApr 13, 12:10 UTC15m
2026-04-13 RYR6UR - Apr 13, 11:10 UTCApr 13, 12:10 UTC1h 0m
2026-04-13 RYR98SG - Apr 13, 09:20 UTCApr 13, 10:20 UTC1h 0m
2026-04-13 RYR4UL NRN → AOI Apr 13, 07:55 UTCApr 13, 08:25 UTC30m
2026-04-13 RYR4UL NRN → AOI Apr 13, 06:50 UTCApr 13, 08:15 UTC1h 25m
2026-04-13 RYR28CC - Apr 13, 04:20 UTCApr 13, 05:55 UTC1h 35m
2026-04-13 RYR28CC - Apr 13, 04:00 UTCApr 13, 04:15 UTC15m
2026-04-12 RYR23VX - Apr 12, 18:25 UTCApr 12, 20:10 UTC1h 45m

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

Mode-S 4CAE4A frequently asked

What is Mode-S code 4CAE4A?
4CAE4A is an ICAO 24-bit transponder address. Allocated to Ireland. Assigned to EI-IHX.
Where is Mode-S 4CAE4A registered?
Mode-S code 4CAE4A is allocated to Ireland (IE). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 4CAE4A broadcasting right now?
Yes. Mode-S 4CAE4A is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 4CAE4A, octal 23127112, decimal 5,025,354.
What flights does 4CAE4A operate?
Mode-S 4CAE4A has broadcast 11 distinct callsigns, including RYR28CC, RYR6UR, RYR58UE, RYR4UL, RYR9TF.