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
Broadcasting now · callsign KZR169 · 225 ft
Flights observed
139
Distinct callsigns
20
Country
IE
Last broadcast
15m ago

Current position

4CAC0A is currently broadcasting. Map zoomed to live position.

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 - 22 2026-07-01
KZR558 - 10 2026-07-02
KZR557 - 9 2026-07-01
KZR216 - 6 2026-06-28
KZR963 Air Astana 5 2026-05-23
KZR926 - 5 2026-07-08
KZR227 Air Astana 5 2026-06-25
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
KZR925 - 3 2026-07-07
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
2026-07-17 KZR660 BJV → ALA Jul 17, 13:05 UTCJul 18, 02:29 UTC13h 25m
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
2026-06-26 KZR592 - Jun 26, 06:35 UTCJun 27, 06:30 UTC23h 55m
2026-06-25 KZR591 - Jun 25, 21:44 UTCJun 26, 12:39 UTC14h 55m
2026-06-25 KZR591 - Jun 25, 17:34 UTCJun 26, 12:39 UTC19h 5m
2026-06-25 KZR227 NQZ → PEK Jun 25, 15:34 UTCJun 25, 15:54 UTC20m
2026-06-23 KZR558 - Jun 23, 04:45 UTCJun 23, 12:40 UTC7h 55m
2026-06-22 KZR292 BOM → ALA Jun 22, 00:50 UTCJun 22, 02:34 UTC1h 45m
2026-06-21 KZR216 AYT → NQZ Jun 21, 09:04 UTCJun 21, 23:00 UTC13h 55m
2026-06-20 KZR215 - Jun 20, 16:00 UTCJun 21, 07:40 UTC15h 40m
2026-06-20 KZR227 NQZ → PEK Jun 20, 13:24 UTCJun 20, 13:44 UTC20m
2026-06-20 KZR227 NQZ → PEK Jun 20, 09:54 UTCJun 20, 10:20 UTC25m
2026-06-19 KZR226 AYT → NQZ Jun 19, 07:54 UTCJun 19, 09:44 UTC1h 50m
2026-06-19 KZR225 NQZ → AYT Jun 19, 04:04 UTCJun 19, 05:14 UTC1h 10m
2026-06-18 KZR558 - Jun 18, 08:55 UTCJun 19, 05:14 UTC20h 19m
2026-06-18 KZR558 - Jun 18, 07:10 UTCJun 19, 05:14 UTC22h 4m

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?
Yes. Mode-S 4CAC0A is currently airborne.
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, KZR216, KZR963.