sensors Mode-S transponder

4CAE5A

ICAO 24-bit transponder address · allocated to Ireland

Currently assigned to EI-IJJ · BOEING 737 MAX 8

Hex
4CAE5A
Octal
23127132
Decimal
5,025,370
Country
IE
Tail
EI-IJJ
Type
B38M
No current signal · last broadcast 12h ago
Flights observed
16
Distinct callsigns
10
Country
IE
Last broadcast
12h ago

Last known position

Most recent position reported by Mode-S 4CAE5A.

Country allocation

The ICAO 24-bit address 4CAE5A 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 10 distinct

Callsign Airline Flights Last seen
RYR6WW Ryanair 3 2026-04-13
RYR13XJ - 3 2026-04-13
RYR55GG - 2 2026-04-13
RYR35JJ - 2 2026-04-13
RYR8DN - 1 2026-04-14
RYR7CV - 1 2026-04-13
RYR5ME Ryanair 1 2026-04-12
RYR522N - 1 2026-04-13
RYR34DA - 1 2026-04-14
RYR17VM - 1 2026-04-14

Recent flights last 16

DateFlightRouteTakeoffLandingDuration
2026-04-14 RYR34DA - Apr 14, 10:10 UTCApr 14, 11:05 UTC55m
2026-04-14 RYR8DN - Apr 14, 07:10 UTCApr 14, 09:00 UTC1h 50m
2026-04-14 RYR17VM - Apr 14, 05:15 UTCApr 14, 05:50 UTC35m
2026-04-13 RYR7CV - Apr 13, 19:55 UTCApr 13, 20:10 UTC15m
2026-04-13 RYR522N - Apr 13, 17:40 UTCApr 13, 18:55 UTC1h 15m
2026-04-13 RYR35JJ - Apr 13, 15:50 UTCApr 13, 16:15 UTC25m
2026-04-13 RYR35JJ - Apr 13, 14:15 UTCApr 13, 16:15 UTC2h 0m
2026-04-13 RYR13XJ - Apr 13, 12:20 UTCApr 13, 12:50 UTC30m
2026-04-13 RYR13XJ - Apr 13, 11:55 UTCApr 13, 12:50 UTC55m
2026-04-13 RYR13XJ - Apr 13, 10:55 UTCApr 13, 12:15 UTC1h 20m
2026-04-13 RYR6WW IBZ → MAN Apr 13, 08:20 UTCApr 13, 09:45 UTC1h 25m
2026-04-13 RYR6WW IBZ → MAN Apr 13, 07:55 UTCApr 13, 09:45 UTC1h 50m
2026-04-13 RYR6WW IBZ → MAN Apr 13, 07:35 UTCApr 13, 08:15 UTC40m
2026-04-13 RYR55GG - Apr 13, 04:20 UTCApr 13, 06:10 UTC1h 50m
2026-04-13 RYR55GG - Apr 13, 03:55 UTCApr 13, 04:15 UTC20m
2026-04-12 RYR5ME DUB → TLS Apr 12, 17:55 UTCApr 12, 19:40 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-IJJ page for operator, model, and routing details .

Mode-S 4CAE5A frequently asked

What is Mode-S code 4CAE5A?
4CAE5A is an ICAO 24-bit transponder address. Allocated to Ireland. Assigned to EI-IJJ.
Where is Mode-S 4CAE5A registered?
Mode-S code 4CAE5A is allocated to Ireland (IE). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 4CAE5A broadcasting right now?
No active broadcast right now. Last signal was 12h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 4CAE5A, octal 23127132, decimal 5,025,370.
What flights does 4CAE5A operate?
Mode-S 4CAE5A has broadcast 10 distinct callsigns, including RYR6WW, RYR13XJ, RYR55GG, RYR35JJ, RYR8DN.