sensors Mode-S transponder

4CAE9A

ICAO 24-bit transponder address · allocated to Ireland

Currently assigned to EI-IKS · BOEING 737 MAX 8

Hex
4CAE9A
Octal
23127232
Decimal
5,025,434
Country
IE
Tail
EI-IKS
Type
B38M
No current signal · last broadcast 12h ago
Flights observed
12
Distinct callsigns
7
Country
IE
Last broadcast
12h ago

Last known position

Most recent position reported by Mode-S 4CAE9A.

Country allocation

The ICAO 24-bit address 4CAE9A 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 7 distinct

Callsign Airline Flights Last seen
RYR4AR - 3 2026-04-13
RYR6604 - 2 2026-04-13
RYR56AZ - 2 2026-04-14
RYR46DB - 2 2026-04-13
RYR8VP - 1 2026-04-12
RYR72PP - 1 2026-04-12
RYR4ZZ Ryanair 1 2026-04-13

Recent flights last 12

DateFlightRouteTakeoffLandingDuration
2026-04-14 RYR56AZ - Apr 14, 09:10 UTCApr 14, 11:05 UTC1h 55m
2026-04-14 RYR56AZ - Apr 14, 07:30 UTCApr 14, 09:05 UTC1h 35m
2026-04-13 RYR6604 - Apr 13, 19:50 UTCApr 13, 22:10 UTC2h 20m
2026-04-13 RYR6604 - Apr 13, 19:25 UTCApr 13, 20:10 UTC45m
2026-04-13 RYR46DB - Apr 13, 16:15 UTCApr 13, 18:25 UTC2h 10m
2026-04-13 RYR46DB - Apr 13, 15:55 UTCApr 13, 16:15 UTC20m
2026-04-13 RYR4AR - Apr 13, 12:20 UTCApr 13, 14:40 UTC2h 20m
2026-04-13 RYR4AR - Apr 13, 11:55 UTCApr 13, 14:40 UTC2h 45m
2026-04-13 RYR4AR - Apr 13, 08:20 UTCApr 13, 12:15 UTC3h 55m
2026-04-13 RYR4ZZ KRK → ARN Apr 13, 04:55 UTCApr 13, 08:15 UTC3h 20m
2026-04-12 RYR8VP EDI → ORK Apr 12, 19:15 UTCApr 12, 20:10 UTC55m
2026-04-12 RYR72PP - Apr 12, 17:15 UTCApr 12, 18:30 UTC1h 15m

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

Mode-S 4CAE9A frequently asked

What is Mode-S code 4CAE9A?
4CAE9A is an ICAO 24-bit transponder address. Allocated to Ireland. Assigned to EI-IKS.
Where is Mode-S 4CAE9A registered?
Mode-S code 4CAE9A is allocated to Ireland (IE). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 4CAE9A 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 4CAE9A, octal 23127232, decimal 5,025,434.
What flights does 4CAE9A operate?
Mode-S 4CAE9A has broadcast 7 distinct callsigns, including RYR4AR, RYR6604, RYR56AZ, RYR46DB, RYR8VP.