Apparatus

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sensors Mode-S transponder

4CAC01

ICAO 24-bit transponder address · allocated to Ireland

Currently assigned to EI-KBH · AIRBUS A-320neo

Hex
4CAC01
Octal
23126001
Decimal
5,024,769
Country
IE
Tail
EI-KBH
Type
A20N
No current signal · last broadcast Jul 23, 18:55 UTC
Flights observed
94
Distinct callsigns
20
Country
IE
Last broadcast
Jul 23, 18:55 UTC

Last known position

Most recent position reported by Mode-S 4CAC01.

Country allocation

The ICAO 24-bit address 4CAC01 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
KZR267 - 7 2026-07-20
KZR346 - 6 2026-07-15
KZR345 - 6 2026-07-15
KZR907 - 5 2026-07-19
KZR302 - 5 2026-07-09
KZR301 - 5 2026-07-20
KZR140 Air Astana 5 2026-07-23
KZR139 Air Astana 5 2026-07-23
KZR917 Air Astana 4 2026-07-11
KZR291 - 4 2026-07-21
KZR268 - 4 2026-06-24
KZR908 - 3 2026-07-19
KZR292 Air Astana 3 2026-07-22
KZR141 Air Astana 3 2026-06-16
KZR963 Air Astana 2 2026-05-17
KZR918 - 2 2026-07-11
KZR870 Air Astana 2 2026-06-02
KZR869 Air Astana 2 2026-06-02
KZR635 Air Astana 2 2026-06-17
KZR248 - 2 2026-07-13

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-23 KZR140 TBS → ALA Jul 23, 18:25 UTCJul 23, 18:55 UTC30m
2026-07-23 KZR139 ALA → TBS Jul 23, 16:35 UTCJul 23, 17:15 UTC40m
2026-07-22 KZR292 BOM → ALA Jul 22, 00:45 UTCJul 22, 02:50 UTC2h 5m
2026-07-21 KZR291 - Jul 21, 22:50 UTCJul 21, 23:10 UTC20m
2026-07-21 KZR291 - Jul 21, 09:00 UTCJul 21, 21:50 UTC12h 50m
2026-07-20 KZR301 - Jul 20, 22:25 UTCJul 21, 07:40 UTC9h 15m
2026-07-20 KZR267 - Jul 20, 20:20 UTCJul 20, 20:40 UTC20m
2026-07-20 KZR898 - Jul 20, 10:00 UTCJul 20, 12:20 UTC2h 20m
2026-07-20 KZR897 - Jul 20, 06:20 UTCJul 20, 08:35 UTC2h 15m
2026-07-19 KZR908 - Jul 19, 10:30 UTCJul 20, 08:35 UTC22h 5m
2026-07-19 KZR907 - Jul 19, 04:20 UTCJul 19, 05:15 UTC55m
2026-07-16 KZR140 TBS → ALA Jul 16, 18:29 UTCJul 16, 18:59 UTC30m
2026-07-16 KZR139 - Jul 16, 16:30 UTCJul 16, 17:10 UTC40m
2026-07-15 KZR346 - Jul 15, 10:40 UTCJul 15, 11:10 UTC30m
2026-07-15 KZR345 - Jul 15, 08:40 UTCJul 15, 09:05 UTC25m
2026-07-14 KZR346 - Jul 14, 10:45 UTCJul 15, 09:05 UTC22h 19m
2026-07-14 KZR345 - Jul 14, 08:40 UTCJul 14, 09:05 UTC25m
2026-07-13 KZR248 - Jul 13, 00:20 UTCJul 13, 00:55 UTC35m
2026-07-12 KZR248 - Jul 12, 19:55 UTCJul 12, 20:10 UTC15m
2026-07-12 KZR247 - Jul 12, 17:20 UTCJul 12, 17:45 UTC25m
2026-07-12 KZR346 - Jul 12, 10:45 UTCJul 12, 14:20 UTC3h 35m
2026-07-11 KZR918 - Jul 11, 20:45 UTCJul 12, 09:05 UTC12h 20m
2026-07-11 KZR917 NQZ → IST Jul 11, 18:20 UTCJul 11, 18:30 UTC10m
2026-07-11 KZR917 NQZ → IST Jul 11, 10:25 UTCJul 11, 17:25 UTC7h 0m
2026-07-10 KZR918 - Jul 10, 20:15 UTCJul 11, 09:00 UTC12h 45m
2026-07-10 KZR917 NQZ → IST Jul 10, 18:20 UTCJul 10, 18:40 UTC20m
2026-07-10 KZR917 NQZ → IST Jul 10, 10:40 UTCJul 10, 17:35 UTC6h 55m
2026-07-10 KZR345 - Jul 10, 08:50 UTCJul 10, 09:15 UTC25m
2026-07-09 KZR302 - Jul 9, 09:00 UTCJul 9, 09:25 UTC25m
2026-07-08 KZR301 - Jul 8, 22:35 UTCJul 9, 07:30 UTC8h 55m
2026-07-08 KZR267 - Jul 8, 20:40 UTCJul 8, 20:55 UTC15m
2026-07-06 KZR908 - Jul 6, 06:55 UTCJul 6, 07:40 UTC45m
2026-07-05 KZR907 - Jul 5, 17:40 UTCJul 6, 05:10 UTC11h 30m
2026-07-05 KZR303 ALA → UKK Jul 5, 15:50 UTCJul 5, 16:10 UTC20m
2026-07-01 KZR302 - Jul 1, 08:55 UTCJul 1, 09:20 UTC25m
2026-07-01 KZR301 - Jul 1, 07:05 UTCJul 1, 07:25 UTC20m
2026-06-30 KZR302 - Jun 30, 08:50 UTCJul 1, 07:25 UTC22h 35m
2026-06-30 KZR301 - Jun 30, 07:00 UTCJun 30, 07:25 UTC25m
2026-06-28 KZR140 TBS → ALA Jun 28, 18:25 UTCJun 28, 18:55 UTC30m
2026-06-27 KZR139 ALA → TBS Jun 27, 22:25 UTCJun 28, 17:19 UTC18h 55m
2026-06-27 KZR267 ALA → PEK Jun 27, 20:14 UTCJun 27, 20:34 UTC20m
2026-06-26 KZR170 BUS → ALA Jun 26, 04:00 UTCJun 26, 04:45 UTC45m
2026-06-26 KZR169 ALA → BUS Jun 26, 01:45 UTCJun 26, 02:40 UTC55m
2026-06-24 KZR268 - Jun 24, 22:14 UTCJun 24, 22:35 UTC20m
2026-06-24 KZR267 ALA → PEK Jun 24, 20:24 UTCJun 24, 20:44 UTC20m
2026-06-21 KZR170 BUS → ALA Jun 21, 04:04 UTCJun 21, 04:49 UTC45m
2026-06-21 KZR169 ALA → BUS Jun 21, 01:45 UTCJun 21, 02:45 UTC1h 0m
2026-06-19 KZR140 TBS → ALA Jun 19, 18:34 UTCJun 19, 19:04 UTC30m
2026-06-19 KZR139 ALA → TBS Jun 19, 16:34 UTCJun 19, 17:09 UTC35m
2026-06-17 KZR636 TGD → ALA Jun 17, 13:20 UTCJun 17, 16:10 UTC2h 50m

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

Mode-S 4CAC01 frequently asked

What is Mode-S code 4CAC01?
4CAC01 is an ICAO 24-bit transponder address. Allocated to Ireland. Assigned to EI-KBH.
Where is Mode-S 4CAC01 registered?
Mode-S code 4CAC01 is allocated to Ireland (IE). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 4CAC01 broadcasting right now?
No active broadcast right now. Last signal was Jul 23, 18:55 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 4CAC01, octal 23126001, decimal 5,024,769.
What flights does 4CAC01 operate?
Mode-S 4CAC01 has broadcast 20 distinct callsigns, including KZR267, KZR346, KZR345, KZR907, KZR302.