Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

4CAC12

ICAO 24-bit transponder address · allocated to Ireland

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

Hex
4CAC12
Octal
23126022
Decimal
5,024,786
Country
IE
Tail
EI-KGC
Type
A21N
No current signal · last broadcast 18h ago
Flights observed
194
Distinct callsigns
20
Country
IE
Last broadcast
18h ago

Last known position

Most recent position reported by Mode-S 4CAC12.

Country allocation

The ICAO 24-bit address 4CAC12 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
KZR564 - 24 2026-07-15
KZR911 Air Astana 18 2026-07-10
KZR931 - 17 2026-07-15
KZR563 - 14 2026-07-14
KZR921 Air Astana 9 2026-05-30
KZR932 - 8 2026-06-27
KZR227 Air Astana 7 2026-06-03
KZR194 Air Astana 7 2026-07-04
KZR922 Air Astana 6 2026-05-30
KZR193 Air Astana 6 2026-05-14
KZR933 - 4 2026-07-16
KZR917 Air Astana 4 2026-07-06
KZR912 - 4 2026-07-01
KZR613 - 4 2026-07-09
KZR199 - 4 2026-07-08
KZR913 - 3 2026-07-10
KZR645 Air Astana 3 2026-04-26
KZR583 - 3 2026-05-31
KZR555 - 3 2026-07-03
KZR267 Air Astana 3 2026-06-05

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-17 KZR934 BKK → ALA Jul 17, 02:15 UTCJul 17, 06:15 UTC4h 0m
2026-07-16 KZR933 - Jul 16, 06:40 UTCJul 17, 00:50 UTC18h 10m
2026-07-16 KZR933 - Jul 16, 04:35 UTCJul 17, 00:50 UTC20h 15m
2026-07-16 KZR933 - Jul 16, 03:30 UTCJul 17, 00:50 UTC21h 20m
2026-07-15 KZR931 - Jul 15, 06:35 UTCJul 16, 01:55 UTC19h 20m
2026-07-15 KZR931 - Jul 15, 05:00 UTCJul 16, 01:55 UTC20h 55m
2026-07-15 KZR564 - Jul 15, 00:35 UTCJul 16, 00:15 UTC23h 40m
2026-07-14 KZR564 - Jul 14, 23:00 UTCJul 15, 22:30 UTC23h 30m
2026-07-14 KZR563 - Jul 14, 21:30 UTCJul 15, 08:15 UTC10h 44m
2026-07-14 KZR564 - Jul 14, 09:05 UTCJul 15, 08:15 UTC23h 9m
2026-07-14 KZR564 - Jul 14, 07:40 UTCJul 15, 06:30 UTC22h 49m
2026-07-14 KZR563 - Jul 14, 00:35 UTCJul 15, 00:30 UTC23h 54m
2026-07-13 KZR563 - Jul 13, 22:35 UTCJul 14, 22:25 UTC23h 50m
2026-07-13 KZR563 - Jul 13, 21:55 UTCJul 14, 10:05 UTC12h 10m
2026-07-11 KZR914 - Jul 11, 09:50 UTCJul 11, 23:35 UTC13h 45m
2026-07-10 KZR913 - Jul 10, 19:35 UTCJul 11, 08:05 UTC12h 30m
2026-07-10 KZR911 ALA → IST Jul 10, 17:20 UTCJul 10, 17:45 UTC25m
2026-07-09 KZR911 ALA → IST Jul 9, 22:35 UTCJul 10, 16:45 UTC18h 10m
2026-07-09 KZR614 - Jul 9, 11:05 UTCJul 10, 04:55 UTC17h 50m
2026-07-09 KZR614 - Jul 9, 10:05 UTCJul 10, 04:55 UTC18h 50m
2026-07-09 KZR613 - Jul 9, 07:40 UTCJul 9, 08:00 UTC20m
2026-07-08 KZR613 - Jul 8, 12:35 UTCJul 9, 06:55 UTC18h 20m
2026-07-08 KZR613 - Jul 8, 10:35 UTCJul 9, 06:55 UTC20h 20m
2026-07-08 KZR200 - Jul 8, 09:25 UTCJul 9, 06:55 UTC21h 30m
2026-07-08 KZR199 - Jul 8, 00:45 UTCJul 8, 12:50 UTC12h 5m
2026-07-07 KZR199 - Jul 7, 14:45 UTCJul 8, 12:50 UTC22h 5m
2026-07-07 KZR199 - Jul 7, 13:35 UTCJul 8, 12:30 UTC22h 55m
2026-07-06 KZR8001 - Jul 6, 20:20 UTCJul 7, 11:55 UTC15h 35m
2026-07-06 KZR917 NQZ → IST Jul 6, 18:00 UTCJul 6, 18:25 UTC25m
2026-07-06 KZR917 NQZ → IST Jul 6, 15:50 UTCJul 6, 17:20 UTC1h 30m
2026-07-04 KZR563 - Jul 4, 21:35 UTCJul 5, 08:15 UTC10h 40m
2026-07-04 KZR563 - Jul 4, 06:40 UTCJul 5, 06:30 UTC23h 50m
2026-07-04 KZR194 CXR → ALA Jul 4, 04:35 UTCJul 5, 00:05 UTC19h 30m
2026-07-04 KZR194 CXR → ALA Jul 4, 03:10 UTCJul 5, 00:05 UTC20h 55m
2026-07-03 KZR194 CXR → ALA Jul 3, 22:35 UTCJul 4, 22:30 UTC23h 55m
2026-07-03 KZR194 CXR → ALA Jul 3, 12:35 UTCJul 4, 07:30 UTC18h 55m
2026-07-03 KZR194 CXR → ALA Jul 3, 10:50 UTCJul 4, 07:30 UTC20h 40m
2026-07-03 KZR194 CXR → ALA Jul 3, 09:10 UTCJul 4, 07:30 UTC22h 20m
2026-07-03 KZR556 - Jul 3, 04:35 UTCJul 4, 04:30 UTC23h 55m
2026-07-03 KZR556 - Jul 3, 02:35 UTCJul 3, 22:45 UTC20h 10m
2026-07-03 KZR555 - Jul 3, 02:15 UTCJul 3, 22:45 UTC20h 30m
2026-07-02 KZR555 - Jul 2, 11:35 UTCJul 3, 10:20 UTC22h 45m
2026-07-02 KZR555 - Jul 2, 10:00 UTCJul 3, 05:40 UTC19h 40m
2026-07-02 KZR613 - Jul 2, 07:45 UTCJul 2, 08:05 UTC20m
2026-07-01 KZR912 - Jul 1, 19:20 UTCJul 2, 07:10 UTC11h 50m
2026-06-30 KZR911 ALA → IST Jun 30, 23:30 UTCJul 1, 17:25 UTC17h 55m
2026-06-30 KZR911 ALA → IST Jun 30, 18:00 UTCJul 1, 16:25 UTC22h 25m
2026-06-30 KZR564 - Jun 30, 07:35 UTCJun 30, 23:55 UTC16h 20m
2026-06-30 KZR564 - Jun 30, 00:35 UTCJun 30, 23:55 UTC23h 21m
2026-06-29 KZR563 - Jun 29, 22:35 UTCJun 30, 18:20 UTC19h 46m

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

Mode-S 4CAC12 frequently asked

What is Mode-S code 4CAC12?
4CAC12 is an ICAO 24-bit transponder address. Allocated to Ireland. Assigned to EI-KGC.
Where is Mode-S 4CAC12 registered?
Mode-S code 4CAC12 is allocated to Ireland (IE). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 4CAC12 broadcasting right now?
No active broadcast right now. Last signal was 18h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 4CAC12, octal 23126022, decimal 5,024,786.
What flights does 4CAC12 operate?
Mode-S 4CAC12 has broadcast 20 distinct callsigns, including KZR564, KZR911, KZR931, KZR563, KZR921.