Apparatus

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sensors Mode-S transponder

4CAC0A

ICAO 24-bit transponder address · allocated to Ireland

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

Hex
4CAC0A
Octal
23126012
Decimal
5,024,778
Country
IE
Tail
EI-KDC
Type
A21N
No current signal · last broadcast Jul 26, 10:30 UTC
Flights observed
153
Distinct callsigns
20
Country
IE
Last broadcast
Jul 26, 10:30 UTC

Last known position

Most recent position reported by Mode-S 4CAC0A.

Country allocation

The ICAO 24-bit address 4CAC0A 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 Air Astana 24 2026-07-25
KZR558 - 10 2026-07-02
KZR557 - 9 2026-07-01
KZR926 - 8 2026-07-21
KZR216 Air Astana 8 2026-07-26
KZR227 - 7 2026-07-23
KZR963 Air Astana 5 2026-05-23
KZR925 Air Astana 5 2026-07-21
KZR226 - 5 2026-07-16
KZR964 Air Astana 4 2026-05-23
KZR915 Air Astana 4 2026-05-18
KZR898 - 4 2026-07-11
KZR225 - 4 2026-07-16
KZR916 Air Astana 3 2026-05-18
KZR907 Air Astana 3 2026-04-18
KZR8263 Air Astana 3 2026-06-02
KZR659 Air Astana 3 2026-07-17
KZR570 Air Astana 3 2026-05-19
KZR139 Air Astana 3 2026-05-06
KZR897 - 2 2026-07-10

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 KZR216 AYT → NQZ Jul 26, 08:45 UTCJul 26, 10:30 UTC1h 45m
2026-07-25 KZR215 NQZ → AYT Jul 25, 12:50 UTCJul 26, 07:15 UTC18h 26m
2026-07-25 KZR661 NQZ → BJV Jul 25, 08:45 UTCJul 25, 11:25 UTC2h 40m
2026-07-24 KZR661 NQZ → BJV Jul 24, 10:35 UTCJul 25, 10:10 UTC23h 35m
2026-07-24 KZR216 AYT → NQZ Jul 24, 08:55 UTCJul 24, 10:45 UTC1h 50m
2026-07-23 KZR215 NQZ → AYT Jul 23, 17:45 UTCJul 24, 07:25 UTC13h 40m
2026-07-23 KZR227 - Jul 23, 15:50 UTCJul 23, 16:10 UTC20m
2026-07-23 KZR227 - Jul 23, 12:05 UTCJul 23, 12:30 UTC25m
2026-07-21 KZR926 - Jul 21, 10:40 UTCJul 22, 05:25 UTC18h 45m
2026-07-21 KZR926 - Jul 21, 09:25 UTCJul 22, 05:25 UTC20h 0m
2026-07-21 KZR925 ALA → AYT Jul 21, 05:25 UTCJul 21, 07:55 UTC2h 30m
2026-07-19 KZR926 - Jul 19, 09:30 UTCJul 19, 11:20 UTC1h 50m
2026-07-18 KZR925 ALA → AYT Jul 18, 20:00 UTCJul 19, 07:55 UTC11h 55m
2026-07-18 KZR170 BUS → ALA Jul 18, 04:10 UTCJul 18, 18:25 UTC14h 15m
2026-07-17 KZR660 BJV → ALA Jul 17, 13:05 UTCJul 18, 02:45 UTC13h 40m
2026-07-17 KZR659 ALA → BJV Jul 17, 09:04 UTCJul 17, 11:45 UTC2h 40m
2026-07-16 KZR226 - Jul 16, 08:00 UTCJul 16, 09:50 UTC1h 50m
2026-07-16 KZR225 - Jul 16, 04:10 UTCJul 16, 06:40 UTC2h 30m
2026-07-14 KZR226 - Jul 14, 08:10 UTCJul 14, 10:00 UTC1h 50m
2026-07-14 KZR225 - Jul 14, 03:50 UTCJul 14, 06:25 UTC2h 35m
2026-07-11 KZR898 - Jul 11, 10:20 UTCJul 11, 12:35 UTC2h 15m
2026-07-10 KZR897 - Jul 10, 13:15 UTCJul 11, 08:30 UTC19h 15m
2026-07-10 KZR898 - Jul 10, 11:05 UTCJul 11, 08:30 UTC21h 25m
2026-07-10 KZR897 - Jul 10, 08:10 UTCJul 10, 08:30 UTC20m
2026-07-09 KZR898 - Jul 9, 10:45 UTCJul 10, 06:20 UTC19h 35m
2026-07-09 KZR898 - Jul 9, 10:15 UTCJul 9, 10:40 UTC25m
2026-07-08 KZR926 - Jul 8, 10:40 UTCJul 9, 06:10 UTC19h 30m
2026-07-08 KZR926 - Jul 8, 09:50 UTCJul 9, 06:10 UTC20h 20m
2026-07-07 KZR925 - Jul 7, 13:15 UTCJul 8, 08:20 UTC19h 5m
2026-07-06 KZR659 ALA → BJV Jul 6, 20:30 UTCJul 7, 11:35 UTC15h 5m
2026-07-06 KZR926 - Jul 6, 09:05 UTCJul 6, 18:55 UTC9h 50m
2026-07-05 KZR925 - Jul 5, 20:15 UTCJul 6, 07:45 UTC11h 30m
2026-07-05 KZR8245 - Jul 5, 08:35 UTCJul 5, 18:50 UTC10h 15m
2026-07-05 KZR8244 - Jul 5, 04:25 UTCJul 5, 06:45 UTC2h 20m
2026-07-04 KZR8244 - Jul 4, 07:20 UTCJul 5, 06:30 UTC23h 10m
2026-07-03 KZR660 BJV → ALA Jul 3, 13:30 UTCJul 4, 05:40 UTC16h 10m
2026-07-03 KZR659 ALA → BJV Jul 3, 00:05 UTCJul 3, 12:05 UTC12h 0m
2026-07-02 KZR267 - Jul 2, 22:10 UTCJul 2, 22:30 UTC20m
2026-07-02 KZR558 - Jul 2, 07:45 UTCJul 2, 10:35 UTC2h 50m
2026-07-01 KZR557 - Jul 1, 10:35 UTCJul 2, 05:05 UTC18h 30m
2026-07-01 KZR557 - Jul 1, 08:40 UTCJul 2, 05:05 UTC20h 25m
2026-07-01 KZR215 - Jul 1, 04:55 UTCJul 1, 07:10 UTC2h 15m
2026-06-30 KZR226 - Jun 30, 08:10 UTCJul 1, 06:10 UTC22h 0m
2026-06-30 KZR225 - Jun 30, 03:45 UTCJun 30, 06:15 UTC2h 30m
2026-06-28 KZR216 - Jun 28, 16:49 UTCJun 28, 18:40 UTC1h 50m
2026-06-28 KZR215 - Jun 28, 05:09 UTCJun 28, 07:25 UTC2h 15m
2026-06-27 KZR215 - Jun 27, 10:50 UTCJun 28, 07:25 UTC20h 35m
2026-06-27 KZR215 - Jun 27, 09:40 UTCJun 28, 07:25 UTC21h 45m
2026-06-27 KZR215 - Jun 27, 07:10 UTCJun 27, 07:30 UTC20m
2026-06-26 KZR592 - Jun 26, 11:00 UTCJun 27, 06:30 UTC19h 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-KDC page for operator, model, and routing details .

Mode-S 4CAC0A frequently asked

What is Mode-S code 4CAC0A?
4CAC0A is an ICAO 24-bit transponder address. Allocated to Ireland. Assigned to EI-KDC.
Where is Mode-S 4CAC0A registered?
Mode-S code 4CAC0A is allocated to Ireland (IE). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 4CAC0A broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 10:30 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 4CAC0A, octal 23126012, decimal 5,024,778.
What flights does 4CAC0A operate?
Mode-S 4CAC0A has broadcast 20 distinct callsigns, including KZR215, KZR558, KZR557, KZR926, KZR216.