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
Broadcasting now · callsign KZR912 · 35,000 ft
Flights observed
86
Distinct callsigns
20
Country
IE
Last broadcast
2h ago

Current position

4CAC12 is currently broadcasting. Map zoomed to live position.

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
KZR921 Air Astana 9 2026-05-30
KZR931 Air Astana 7 2026-06-01
KZR922 Air Astana 6 2026-05-30
KZR911 Air Astana 6 2026-06-02
KZR227 Air Astana 6 2026-05-27
KZR193 Air Astana 6 2026-05-14
KZR932 Air Astana 4 2026-06-02
KZR645 Air Astana 3 2026-04-26
KZR583 - 3 2026-05-31
KZR918 Air Astana 2 2026-05-29
KZR917 Air Astana 2 2026-05-29
KZR912 Air Astana 2 2026-05-16
KZR907 Air Astana 2 2026-05-08
KZR646 Air Astana 2 2026-04-27
KZR564 Air Astana 2 2026-05-21
KZR291 Air Astana 2 2026-04-28
KZR267 Air Astana 2 2026-04-24
KZR228 Air Astana 2 2026-05-06
KZR215 Air Astana 2 2026-05-22
KZR2100 Air Astana 2 2026-04-19

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-06-02 KZR911 ALA → IST Jun 2, 17:30 UTCJun 2, 17:45 UTC15m
2026-06-02 KZR932 BKK → ALA Jun 2, 03:35 UTCJun 2, 16:50 UTC13h 15m
2026-06-01 KZR931 ALA → BKK Jun 1, 06:35 UTCJun 2, 02:05 UTC19h 30m
2026-06-01 KZR931 ALA → BKK Jun 1, 06:20 UTCJun 2, 02:05 UTC19h 45m
2026-06-01 KZR931 ALA → BKK Jun 1, 00:55 UTCJun 2, 00:15 UTC23h 20m
2026-05-31 KZR583 - May 31, 12:35 UTCJun 1, 06:50 UTC18h 15m
2026-05-31 KZR583 - May 31, 12:25 UTCJun 1, 06:50 UTC18h 25m
2026-05-30 KZR583 - May 30, 23:20 UTCMay 31, 22:20 UTC23h 0m
2026-05-30 KZR922 FRA → NQZ May 30, 14:35 UTCMay 31, 12:50 UTC22h 15m
2026-05-30 KZR922 FRA → NQZ May 30, 13:55 UTCMay 31, 12:30 UTC22h 35m
2026-05-30 KZR921 NQZ → FRA May 30, 07:05 UTCMay 30, 11:40 UTC4h 35m
2026-05-29 KZR921 NQZ → FRA May 29, 10:35 UTCMay 30, 10:30 UTC23h 55m
2026-05-29 KZR918 IST → NQZ May 29, 09:25 UTCMay 30, 08:15 UTC22h 50m
2026-05-29 KZR917 NQZ → IST May 29, 07:25 UTCMay 29, 07:55 UTC30m
2026-05-28 KZR922 FRA → NQZ May 28, 13:55 UTCMay 29, 06:50 UTC16h 55m
2026-05-27 KZR921 NQZ → FRA May 27, 20:10 UTCMay 28, 11:35 UTC15h 25m
2026-05-27 KZR227 NQZ → PEK May 27, 17:50 UTCMay 27, 18:05 UTC15m
2026-05-27 KZR227 NQZ → PEK May 27, 14:15 UTCMay 27, 14:40 UTC25m
2026-05-26 KZR200 - May 26, 00:39 UTCMay 26, 11:54 UTC11h 15m
2026-05-25 KZR200 - May 25, 13:10 UTCMay 26, 11:54 UTC22h 44m
2026-05-24 KZR584 SYX → NQZ May 24, 23:00 UTCMay 25, 13:40 UTC14h 40m
2026-05-24 KZR918 IST → NQZ May 24, 10:20 UTCMay 24, 23:05 UTC12h 45m
2026-05-24 KZR917 NQZ → IST May 24, 07:00 UTCMay 24, 07:10 UTC10m
2026-05-23 KZR922 FRA → NQZ May 23, 14:05 UTCMay 24, 06:15 UTC16h 10m
2026-05-23 KZR921 NQZ → FRA May 23, 07:25 UTCMay 23, 11:50 UTC4h 25m
2026-05-22 KZR921 NQZ → FRA May 22, 10:35 UTCMay 23, 10:30 UTC23h 54m
2026-05-22 KZR216 AYT → NQZ May 22, 08:40 UTCMay 23, 08:30 UTC23h 49m
2026-05-22 KZR215 NQZ → AYT May 22, 04:55 UTCMay 22, 07:10 UTC2h 15m
2026-05-21 KZR215 NQZ → AYT May 21, 08:35 UTCMay 22, 07:10 UTC22h 35m
2026-05-21 KZR564 HKT → ALA May 21, 08:25 UTCMay 22, 06:05 UTC21h 40m
2026-05-21 KZR564 HKT → ALA May 21, 02:45 UTCMay 21, 09:55 UTC7h 10m
2026-05-19 KZR563 ALA → HKT May 19, 11:00 UTCMay 20, 04:05 UTC17h 5m
2026-05-18 KZR922 FRA → NQZ May 18, 14:15 UTCMay 19, 08:25 UTC18h 9m
2026-05-18 KZR921 NQZ → FRA May 18, 07:00 UTCMay 18, 11:35 UTC4h 35m
2026-05-16 KZR912 IST → ALA May 16, 19:45 UTCMay 16, 21:00 UTC1h 15m
2026-05-16 KZR912 IST → ALA May 16, 18:55 UTCMay 16, 19:05 UTC10m
2026-05-16 KZR911 ALA → IST May 16, 06:35 UTCMay 16, 16:00 UTC9h 25m
2026-05-15 KZR911 ALA → IST May 15, 14:45 UTCMay 16, 05:00 UTC14h 14m
2026-05-14 KZR911 ALA → IST May 14, 23:15 UTCMay 15, 20:55 UTC21h 39m
2026-05-14 KZR193 ALA → CXR May 14, 20:35 UTCMay 15, 20:30 UTC23h 54m
2026-05-14 KZR193 ALA → CXR May 14, 19:35 UTCMay 15, 16:00 UTC20h 24m
2026-05-12 KZR664 SCO → ALA May 12, 17:25 UTCMay 12, 22:10 UTC4h 45m
2026-05-11 KZR663 SCO → LHR May 11, 21:15 UTCMay 12, 15:40 UTC18h 25m
2026-05-11 KZR911 ALA → IST May 11, 14:50 UTCMay 11, 16:10 UTC1h 20m
2026-05-09 KZR932 BKK → ALA May 9, 03:35 UTCMay 9, 07:45 UTC4h 10m
2026-05-08 KZR931 ALA → BKK May 8, 06:35 UTCMay 9, 01:45 UTC19h 10m
2026-05-08 KZR907 ALA → DEL May 8, 04:00 UTCMay 8, 05:00 UTC1h 0m
2026-05-06 KZR228 PEK → NQZ May 6, 20:15 UTCMay 6, 20:30 UTC15m
2026-05-06 KZR227 NQZ → PEK May 6, 18:05 UTCMay 6, 18:25 UTC20m
2026-05-06 KZR227 NQZ → PEK May 6, 14:25 UTCMay 6, 14:45 UTC20m

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?
Yes. Mode-S 4CAC12 is currently airborne.
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 KZR921, KZR931, KZR922, KZR911, KZR227.