Apparatus

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sensors Mode-S transponder

4CAE9B

ICAO 24-bit transponder address · allocated to Ireland

Currently assigned to EI-IKT · BOEING 737 MAX 8

Hex
4CAE9B
Octal
23127233
Decimal
5,025,435
Country
IE
Tail
EI-IKT
Type
B38M
No current signal · last broadcast Jul 26, 21:50 UTC
Flights observed
606
Distinct callsigns
20
Country
IE
Last broadcast
Jul 26, 21:50 UTC

Last known position

Most recent position reported by Mode-S 4CAE9B.

Country allocation

The ICAO 24-bit address 4CAE9B 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
RYR91EQ - 10 2026-07-23
RYR9DC Ryanair 8 2026-04-21
RYR43JZ Ryanair 8 2026-07-26
RYR10AM Ryanair 8 2026-04-21
RYR5SB Ryanair 7 2026-06-29
RYR30TE Ryanair 7 2026-06-29
RYR26ZX Ryanair 7 2026-04-21
RYR99XX Ryanair 6 2026-07-21
RYR94GZ Ryanair 6 2026-07-23
RYR61ME Ryanair 6 2026-04-21
RYR4QT Ryanair 6 2026-07-25
RYR15ZZ - 6 2026-07-23
RYR95MP - 5 2026-06-24
RYR8YY - 5 2026-06-23
RYR8RZ - 5 2026-06-24
RYR87YR Ryanair 5 2026-07-26
RYR877Z - 5 2026-07-21
RYR77CN - 5 2026-06-23
RYR6673 - 5 2026-07-25
RYR61NG - 5 2026-06-24

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 RYR87YR CRL → FNC Jul 26, 18:25 UTCJul 26, 21:45 UTC3h 20m
2026-07-26 RYR29XE FNC → CRL Jul 26, 14:00 UTCJul 26, 17:30 UTC3h 30m
2026-07-26 RYR43JZ BVA → FNC Jul 26, 09:15 UTCJul 26, 12:20 UTC3h 5m
2026-07-26 RYR25UK FNC → BVA Jul 26, 05:05 UTCJul 26, 08:20 UTC3h 16m
2026-07-25 RYR4QT AAR → STN Jul 25, 22:35 UTCJul 25, 22:45 UTC10m
2026-07-25 RYR4QT AAR → STN Jul 25, 19:15 UTCJul 25, 21:55 UTC2h 40m
2026-07-25 RYR6673 - Jul 25, 15:10 UTCJul 25, 18:20 UTC3h 10m
2026-07-25 RYR6673 - Jul 25, 14:30 UTCJul 25, 14:40 UTC10m
2026-07-25 RYR6672 - Jul 25, 13:20 UTCJul 25, 13:30 UTC10m
2026-07-25 RYR6672 - Jul 25, 09:30 UTCJul 25, 12:45 UTC3h 15m
2026-07-25 RYR6671 FNC → MXP Jul 25, 05:05 UTCJul 25, 08:10 UTC3h 5m
2026-07-24 RYR87YR CRL → FNC Jul 24, 23:50 UTCJul 25, 00:10 UTC20m
2026-07-24 RYR87YR CRL → FNC Jul 24, 16:25 UTCJul 24, 23:20 UTC6h 55m
2026-07-24 RYR9UA AGP → PAD Jul 24, 15:15 UTCJul 24, 15:25 UTC10m
2026-07-24 RYR9UA AGP → PAD Jul 24, 13:40 UTCJul 24, 14:40 UTC1h 0m
2026-07-24 RYR10UB FNC → OPO Jul 24, 11:05 UTCJul 24, 12:40 UTC1h 35m
2026-07-24 RYR385 LIS → FNC Jul 24, 09:55 UTCJul 24, 10:10 UTC15m
2026-07-24 RYR385 LIS → FNC Jul 24, 08:30 UTCJul 24, 09:15 UTC45m
2026-07-24 RYR384 FNC → LIS Jul 24, 06:10 UTCJul 24, 07:20 UTC1h 10m
2026-07-23 RYR91EQ - Jul 23, 21:55 UTCJul 23, 22:05 UTC10m
2026-07-23 RYR91EQ - Jul 23, 18:35 UTCJul 23, 21:20 UTC2h 45m
2026-07-23 RYR94GZ FNC → STN Jul 23, 14:10 UTCJul 23, 17:15 UTC3h 5m
2026-07-23 RYR15ZZ - Jul 23, 12:40 UTCJul 23, 12:50 UTC10m
2026-07-23 RYR15ZZ - Jul 23, 09:20 UTCJul 23, 12:00 UTC2h 40m
2026-07-23 RYR97GU - Jul 23, 05:55 UTCJul 23, 08:10 UTC2h 15m
2026-07-23 RYR97GU - Jul 23, 05:05 UTCJul 23, 05:20 UTC15m
2026-07-22 RYR385 LIS → FNC Jul 22, 20:40 UTCJul 22, 22:15 UTC1h 35m
2026-07-22 RYR384 FNC → LIS Jul 22, 18:50 UTCJul 22, 19:35 UTC45m
2026-07-22 RYR384 FNC → LIS Jul 22, 18:05 UTCJul 22, 18:15 UTC10m
2026-07-22 RYR43JZ BVA → FNC Jul 22, 12:10 UTCJul 22, 12:20 UTC10m
2026-07-22 RYR43JZ BVA → FNC Jul 22, 10:20 UTCJul 22, 11:25 UTC1h 5m
2026-07-22 RYR25UK - Jul 22, 05:05 UTCJul 22, 05:15 UTC10m
2026-07-21 RYR99XX MAN → FNC Jul 21, 23:45 UTCJul 21, 23:55 UTC10m
2026-07-21 RYR99XX MAN → FNC Jul 21, 20:25 UTCJul 21, 23:00 UTC2h 35m
2026-07-21 RYR877Z - Jul 21, 17:05 UTCJul 21, 19:35 UTC2h 30m
2026-07-21 RYR877Z - Jul 21, 16:15 UTCJul 21, 16:25 UTC10m
2026-07-21 RYR91EQ - Jul 21, 12:45 UTCJul 21, 12:55 UTC10m
2026-07-21 RYR91EQ - Jul 21, 09:35 UTCJul 21, 11:55 UTC2h 20m
2026-07-21 RYR94GZ FNC → STN Jul 21, 05:05 UTCJul 21, 08:20 UTC3h 15m
2026-07-20 RYR6049 OPO → FNC Jul 20, 21:50 UTCJul 20, 23:35 UTC1h 45m
2026-07-20 RYR12LF FNC → OPO Jul 20, 19:15 UTCJul 20, 21:00 UTC1h 45m
2026-07-20 RYR385 LIS → FNC Jul 20, 16:40 UTCJul 20, 18:10 UTC1h 30m
2026-07-20 RYR384 FNC → LIS Jul 20, 14:15 UTCJul 20, 15:40 UTC1h 25m
2026-07-20 RYR088 LIS → FNC Jul 20, 09:10 UTCJul 20, 10:35 UTC1h 25m
2026-07-20 RYR3WD FNC → LIS Jul 20, 06:35 UTCJul 20, 07:55 UTC1h 20m
2026-07-19 RYR87YR - Jul 19, 18:15 UTCJul 19, 22:05 UTC3h 50m
2026-07-19 RYR29XE FNC → CRL Jul 19, 13:55 UTCJul 19, 17:10 UTC3h 15m
2026-07-19 RYR43JZ - Jul 19, 12:15 UTCJul 19, 12:25 UTC10m
2026-07-19 RYR43JZ - Jul 19, 09:10 UTCJul 19, 11:40 UTC2h 30m
2026-07-19 RYR25UK - Jul 19, 05:10 UTCJul 19, 08:05 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-IKT page for operator, model, and routing details .

Mode-S 4CAE9B frequently asked

What is Mode-S code 4CAE9B?
4CAE9B is an ICAO 24-bit transponder address. Allocated to Ireland. Assigned to EI-IKT.
Where is Mode-S 4CAE9B registered?
Mode-S code 4CAE9B is allocated to Ireland (IE). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 4CAE9B broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 21:50 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 4CAE9B, octal 23127233, decimal 5,025,435.
What flights does 4CAE9B operate?
Mode-S 4CAE9B has broadcast 20 distinct callsigns, including RYR91EQ, RYR9DC, RYR43JZ, RYR10AM, RYR5SB.