sensors Mode-S transponder

4CAE8C

ICAO 24-bit transponder address · allocated to Ireland

Currently assigned to EI-IKJ · BOEING 737 MAX 8

Hex
4CAE8C
Octal
23127214
Decimal
5,025,420
Country
IE
Tail
EI-IKJ
Type
B38M
No current signal · last broadcast 12h ago
Flights observed
12
Distinct callsigns
9
Country
IE
Last broadcast
12h ago

Last known position

Most recent position reported by Mode-S 4CAE8C.

Country allocation

The ICAO 24-bit address 4CAE8C 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 9 distinct

Callsign Airline Flights Last seen
RYR7JF - 2 2026-04-14
RYR7865 - 2 2026-04-13
RYR65ZK - 2 2026-04-14
RYR9YC - 1 2026-04-13
RYR9WF - 1 2026-04-13
RYR6737 - 1 2026-04-12
RYR4SZ - 1 2026-04-13
RYR4RL - 1 2026-04-13
RYR3MP Ryanair 1 2026-04-13

Recent flights last 12

DateFlightRouteTakeoffLandingDuration
2026-04-14 RYR65ZK - Apr 14, 09:10 UTCApr 14, 11:05 UTC1h 55m
2026-04-14 RYR65ZK - Apr 14, 08:40 UTCApr 14, 09:05 UTC25m
2026-04-14 RYR7JF - Apr 14, 07:10 UTCApr 14, 07:40 UTC30m
2026-04-14 RYR7JF - Apr 14, 05:15 UTCApr 14, 07:10 UTC1h 55m
2026-04-13 RYR4SZ - Apr 13, 21:40 UTCApr 13, 22:30 UTC50m
2026-04-13 RYR4RL - Apr 13, 20:00 UTCApr 13, 20:10 UTC10m
2026-04-13 RYR7865 - Apr 13, 16:15 UTCApr 13, 18:45 UTC2h 30m
2026-04-13 RYR7865 - Apr 13, 16:10 UTCApr 13, 18:45 UTC2h 35m
2026-04-13 RYR9WF - Apr 13, 12:40 UTCApr 13, 15:10 UTC2h 30m
2026-04-13 RYR9YC - Apr 13, 09:00 UTCApr 13, 11:20 UTC2h 20m
2026-04-13 RYR3MP ARN → AGP Apr 13, 05:20 UTCApr 13, 07:55 UTC2h 35m
2026-04-12 RYR6737 - Apr 12, 17:20 UTCApr 12, 20:15 UTC2h 55m

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

Mode-S 4CAE8C frequently asked

What is Mode-S code 4CAE8C?
4CAE8C is an ICAO 24-bit transponder address. Allocated to Ireland. Assigned to EI-IKJ.
Where is Mode-S 4CAE8C registered?
Mode-S code 4CAE8C is allocated to Ireland (IE). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 4CAE8C 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 4CAE8C, octal 23127214, decimal 5,025,420.
What flights does 4CAE8C operate?
Mode-S 4CAE8C has broadcast 9 distinct callsigns, including RYR7JF, RYR7865, RYR65ZK, RYR9YC, RYR9WF.