Apparatus

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sensors Mode-S transponder

4CAC0B

ICAO 24-bit transponder address · allocated to Ireland

Currently assigned to EI-KDD · AIRBUS A-321neo

Hex
4CAC0B
Octal
23126013
Decimal
5,024,779
Country
IE
Tail
EI-KDD
Type
A21N
No current signal · last broadcast Jul 26, 20:40 UTC
Flights observed
164
Distinct callsigns
20
Country
IE
Last broadcast
Jul 26, 20:40 UTC

Last known position

Most recent position reported by Mode-S 4CAC0B.

Country allocation

The ICAO 24-bit address 4CAC0B 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
KZR215 - 14 2026-07-03
KZR925 Air Astana 12 2026-07-24
KZR139 Air Astana 9 2026-05-31
KZR140 Air Astana 8 2026-05-31
KZR963 - 7 2026-07-26
KZR915 - 7 2026-06-16
KZR926 Air Astana 6 2026-07-25
KZR558 - 6 2026-06-30
KZR557 - 6 2026-06-30
KZR216 - 6 2026-07-03
KZR908 - 5 2026-07-08
KZR661 Air Astana 5 2026-07-01
KZR292 - 5 2026-07-15
KZR291 - 5 2026-07-14
KZR964 Air Astana 4 2026-07-26
KZR907 Air Astana 4 2026-07-25
KZR591 - 4 2026-06-19
KZR267 - 4 2026-07-23
KZR917 Air Astana 3 2026-06-06
KZR916 Air Astana 3 2026-07-22

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 KZR964 DEL → ALA Jul 26, 19:55 UTCJul 26, 20:40 UTC45m
2026-07-26 KZR963 - Jul 26, 06:40 UTCJul 26, 18:30 UTC11h 50m
2026-07-25 KZR907 ALA → DEL Jul 25, 20:10 UTCJul 26, 05:05 UTC8h 55m
2026-07-25 KZR926 AYT → ALA Jul 25, 08:15 UTCJul 25, 18:50 UTC10h 35m
2026-07-24 KZR925 ALA → AYT Jul 24, 13:15 UTCJul 25, 06:35 UTC17h 20m
2026-07-23 KZR659 ALA → BJV Jul 23, 22:35 UTCJul 24, 11:40 UTC13h 5m
2026-07-23 KZR267 - Jul 23, 20:25 UTCJul 23, 20:45 UTC20m
2026-07-23 KZR926 - Jul 23, 09:05 UTCJul 23, 10:55 UTC1h 50m
2026-07-23 KZR925 ALA → AYT Jul 23, 07:10 UTCJul 23, 07:35 UTC25m
2026-07-22 KZR916 AYT → ALA Jul 22, 11:10 UTCJul 23, 06:30 UTC19h 20m
2026-07-21 KZR142 - Jul 21, 11:40 UTCJul 21, 12:10 UTC30m
2026-07-21 KZR141 - Jul 21, 09:35 UTCJul 21, 10:15 UTC40m
2026-07-19 KZR897 - Jul 19, 06:05 UTCJul 19, 12:45 UTC6h 40m
2026-07-18 KZR897 - Jul 18, 12:25 UTCJul 19, 06:10 UTC17h 45m
2026-07-17 KZR898 - Jul 17, 12:10 UTCJul 18, 06:15 UTC18h 6m
2026-07-17 KZR898 - Jul 17, 10:00 UTCJul 18, 06:15 UTC20h 16m
2026-07-16 KZR590 - Jul 16, 13:30 UTCJul 17, 06:10 UTC16h 40m
2026-07-16 KZR589 - Jul 16, 08:45 UTCJul 16, 11:15 UTC2h 30m
2026-07-15 KZR292 - Jul 15, 00:35 UTCJul 15, 02:20 UTC1h 45m
2026-07-14 KZR291 - Jul 14, 21:00 UTCJul 14, 23:00 UTC1h 59m
2026-07-13 KZR590 - Jul 13, 08:35 UTCJul 13, 10:30 UTC1h 55m
2026-07-12 KZR660 BJV → ALA Jul 12, 13:10 UTCJul 13, 06:20 UTC17h 10m
2026-07-11 KZR659 ALA → BJV Jul 11, 22:50 UTCJul 12, 11:40 UTC12h 50m
2026-07-11 KZR267 - Jul 11, 20:20 UTCJul 11, 20:35 UTC15m
2026-07-11 KZR926 - Jul 11, 08:10 UTCJul 11, 10:05 UTC1h 55m
2026-07-10 KZR925 - Jul 10, 11:00 UTCJul 11, 06:30 UTC19h 30m
2026-07-10 KZR925 - Jul 10, 09:50 UTCJul 11, 06:30 UTC20h 40m
2026-07-10 KZR925 - Jul 10, 05:35 UTCJul 10, 08:15 UTC2h 40m
2026-07-09 KZR925 - Jul 9, 10:50 UTCJul 10, 08:15 UTC21h 25m
2026-07-09 KZR925 - Jul 9, 09:20 UTCJul 10, 08:15 UTC22h 55m
2026-07-08 KZR925 - Jul 8, 21:05 UTCJul 9, 07:50 UTC10h 45m
2026-07-08 KZR908 - Jul 8, 06:20 UTCJul 8, 19:25 UTC13h 5m
2026-07-07 KZR926 - Jul 7, 09:15 UTCJul 8, 04:45 UTC19h 30m
2026-07-07 KZR925 - Jul 7, 05:10 UTCJul 7, 07:45 UTC2h 35m
2026-07-06 KZR925 - Jul 6, 08:50 UTCJul 7, 07:45 UTC22h 55m
2026-07-06 KZR590 - Jul 6, 08:30 UTCJul 7, 06:25 UTC21h 55m
2026-07-05 KZR589 - Jul 5, 13:20 UTCJul 6, 06:35 UTC17h 15m
2026-07-04 KZR659 ALA → BJV Jul 4, 22:30 UTCJul 5, 11:30 UTC13h 0m
2026-07-04 KZR267 - Jul 4, 20:20 UTCJul 4, 20:40 UTC20m
2026-07-03 KZR216 - Jul 3, 08:35 UTCJul 3, 10:25 UTC1h 50m
2026-07-03 KZR215 - Jul 3, 06:40 UTCJul 3, 07:10 UTC30m
2026-07-02 KZR215 - Jul 2, 10:50 UTCJul 3, 06:00 UTC19h 10m
2026-07-02 KZR216 - Jul 2, 09:15 UTCJul 3, 06:00 UTC20h 45m
2026-07-01 KZR215 - Jul 1, 12:50 UTCJul 2, 07:40 UTC18h 50m
2026-07-01 KZR215 - Jul 1, 12:20 UTCJul 2, 07:40 UTC19h 20m
2026-07-01 KZR661 NQZ → BJV Jul 1, 08:05 UTCJul 1, 10:40 UTC2h 35m
2026-06-30 KZR661 NQZ → BJV Jun 30, 11:20 UTCJul 1, 10:40 UTC23h 20m
2026-06-30 KZR558 - Jun 30, 09:35 UTCJul 1, 08:45 UTC23h 10m
2026-06-30 KZR557 - Jun 30, 04:30 UTCJun 30, 07:25 UTC2h 55m
2026-06-29 KZR557 - Jun 29, 08:54 UTCJun 30, 07:25 UTC22h 30m

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

Mode-S 4CAC0B frequently asked

What is Mode-S code 4CAC0B?
4CAC0B is an ICAO 24-bit transponder address. Allocated to Ireland. Assigned to EI-KDD.
Where is Mode-S 4CAC0B registered?
Mode-S code 4CAC0B is allocated to Ireland (IE). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 4CAC0B broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 20:40 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 4CAC0B, octal 23126013, decimal 5,024,779.
What flights does 4CAC0B operate?
Mode-S 4CAC0B has broadcast 20 distinct callsigns, including KZR215, KZR925, KZR139, KZR140, KZR963.