Apparatus

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sensors Mode-S transponder

4CAC11

ICAO 24-bit transponder address · allocated to Ireland

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

Hex
4CAC11
Octal
23126021
Decimal
5,024,785
Country
IE
Tail
EI-KGB
Type
A21N
No current signal · last broadcast 1h ago
Flights observed
197
Distinct callsigns
20
Country
IE
Last broadcast
1h ago

Last known position

Most recent position reported by Mode-S 4CAC11.

Country allocation

The ICAO 24-bit address 4CAC11 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
KZR931 - 20 2026-07-13
KZR911 Air Astana 20 2026-07-11
KZR564 - 14 2026-07-12
KZR932 - 11 2026-07-14
KZR912 - 7 2026-07-11
KZR563 - 7 2026-07-09
KZR933 Air Astana 6 2026-07-02
KZR921 Air Astana 6 2026-05-13
KZR646 Air Astana 6 2026-05-27
KZR922 Air Astana 5 2026-05-13
KZR918 Air Astana 5 2026-06-04
KZR913 Air Astana 5 2026-06-27
KZR209 Air Astana 5 2026-06-06
KZR162 Air Astana 5 2026-04-25
KZR934 Air Astana 4 2026-07-03
KZR603 Air Astana 4 2026-06-25
KZR585 Air Astana 4 2026-05-28
KZR556 - 4 2026-06-30
KZR210 Air Astana 4 2026-06-07
KZR193 Air Astana 4 2026-04-24

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 KZR932 - Jul 14, 03:35 UTCJul 14, 07:35 UTC4h 0m
2026-07-13 KZR931 - Jul 13, 06:20 UTCJul 14, 01:45 UTC19h 25m
2026-07-13 KZR931 - Jul 13, 04:40 UTCJul 14, 01:45 UTC21h 5m
2026-07-12 KZR564 - Jul 12, 22:20 UTCJul 13, 22:15 UTC23h 55m
2026-07-12 KZR564 - Jul 12, 21:30 UTCJul 13, 08:10 UTC10h 40m
2026-07-12 KZR564 - Jul 12, 10:25 UTCJul 13, 08:10 UTC21h 45m
2026-07-11 KZR912 - Jul 11, 19:05 UTCJul 12, 08:01 UTC12h 55m
2026-07-11 KZR911 ALA → IST Jul 11, 16:55 UTCJul 11, 17:15 UTC20m
2026-07-11 KZR911 ALA → IST Jul 11, 03:25 UTCJul 11, 16:15 UTC12h 50m
2026-07-10 KZR931 - Jul 10, 06:20 UTCJul 11, 02:00 UTC19h 40m
2026-07-10 KZR931 - Jul 10, 05:45 UTCJul 11, 02:00 UTC20h 15m
2026-07-09 KZR564 - Jul 9, 22:20 UTCJul 10, 22:15 UTC23h 55m
2026-07-09 KZR563 - Jul 9, 21:30 UTCJul 10, 08:10 UTC10h 40m
2026-07-09 KZR563 - Jul 9, 04:20 UTCJul 9, 23:55 UTC19h 35m
2026-07-09 KZR563 - Jul 9, 03:50 UTCJul 9, 23:55 UTC20h 5m
2026-07-08 KZR931 - Jul 8, 06:20 UTCJul 9, 02:15 UTC19h 55m
2026-07-08 KZR931 - Jul 8, 05:45 UTCJul 9, 02:15 UTC20h 30m
2026-07-07 KZR564 - Jul 7, 22:20 UTCJul 8, 22:15 UTC23h 55m
2026-07-07 KZR563 - Jul 7, 21:30 UTCJul 8, 08:05 UTC10h 35m
2026-07-06 KZR898 - Jul 6, 10:25 UTCJul 6, 10:55 UTC30m
2026-07-06 KZR897 - Jul 6, 08:20 UTCJul 6, 08:50 UTC30m
2026-07-05 KZR912 - Jul 5, 19:00 UTCJul 6, 06:30 UTC11h 30m
2026-07-05 KZR911 ALA → IST Jul 5, 16:45 UTCJul 5, 17:10 UTC25m
2026-07-05 KZR932 - Jul 5, 03:30 UTCJul 5, 16:05 UTC12h 35m
2026-07-04 KZR931 - Jul 4, 06:20 UTCJul 5, 01:55 UTC19h 35m
2026-07-04 KZR931 - Jul 4, 04:20 UTCJul 5, 01:55 UTC21h 35m
2026-07-04 KZR932 - Jul 4, 03:45 UTCJul 5, 01:55 UTC22h 10m
2026-07-03 KZR934 BKK → ALA Jul 3, 11:35 UTCJul 4, 02:05 UTC14h 30m
2026-07-02 KZR933 ALA → BKK Jul 2, 20:45 UTCJul 3, 10:15 UTC13h 30m
2026-07-02 KZR912 - Jul 2, 19:05 UTCJul 2, 19:35 UTC30m
2026-07-02 KZR911 ALA → IST Jul 2, 17:05 UTCJul 2, 17:25 UTC20m
2026-07-02 KZR911 ALA → IST Jul 2, 14:50 UTCJul 2, 16:20 UTC1h 30m
2026-07-01 KZR587 - Jul 1, 04:55 UTCJul 1, 23:20 UTC18h 25m
2026-07-01 KZR587 - Jul 1, 01:05 UTCJul 1, 23:20 UTC22h 15m
2026-06-30 KZR556 - Jun 30, 10:20 UTCJul 1, 05:35 UTC19h 15m
2026-06-30 KZR556 - Jun 30, 09:40 UTCJul 1, 05:35 UTC19h 55m
2026-06-30 KZR556 - Jun 30, 06:20 UTCJul 1, 05:35 UTC23h 15m
2026-06-30 KZR556 - Jun 30, 04:20 UTCJul 1, 01:10 UTC20h 50m
2026-06-30 KZR555 - Jun 30, 03:25 UTCJul 1, 01:10 UTC21h 45m
2026-06-29 KZR555 - Jun 29, 20:00 UTCJun 30, 13:10 UTC17h 11m
2026-06-29 KZR963 - Jun 29, 17:55 UTCJun 29, 18:34 UTC40m
2026-06-27 KZR914 IST → ALA Jun 27, 09:55 UTCJun 27, 23:14 UTC13h 20m
2026-06-27 KZR913 ALA → IST Jun 27, 07:39 UTCJun 27, 08:05 UTC25m
2026-06-26 KZR912 IST → ALA Jun 26, 18:39 UTCJun 27, 07:04 UTC12h 25m
2026-06-25 KZR911 ALA → IST Jun 25, 23:24 UTCJun 26, 17:09 UTC17h 45m
2026-06-25 KZR911 ALA → IST Jun 25, 18:19 UTCJun 26, 17:09 UTC22h 50m
2026-06-25 KZR281 ALA → PVG Jun 25, 06:20 UTCJun 25, 23:44 UTC17h 25m
2026-06-25 KZR603 ALA → HKT Jun 25, 00:19 UTCJun 25, 23:44 UTC23h 25m
2026-06-24 KZR603 ALA → HKT Jun 24, 23:29 UTCJun 25, 18:45 UTC19h 15m
2026-06-24 KZR603 ALA → HKT Jun 24, 08:20 UTCJun 25, 07:25 UTC23h 5m

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

Mode-S 4CAC11 frequently asked

What is Mode-S code 4CAC11?
4CAC11 is an ICAO 24-bit transponder address. Allocated to Ireland. Assigned to EI-KGB.
Where is Mode-S 4CAC11 registered?
Mode-S code 4CAC11 is allocated to Ireland (IE). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 4CAC11 broadcasting right now?
No active broadcast right now. Last signal was 1h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 4CAC11, octal 23126021, decimal 5,024,785.
What flights does 4CAC11 operate?
Mode-S 4CAC11 has broadcast 20 distinct callsigns, including KZR931, KZR911, KZR564, KZR932, KZR912.