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 8h ago
Flights observed
84
Distinct callsigns
20
Country
IE
Last broadcast
8h 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
KZR911 Air Astana 7 2026-05-07
KZR921 Air Astana 6 2026-05-13
KZR646 Air Astana 6 2026-05-27
KZR933 Air Astana 5 2026-05-29
KZR932 Air Astana 5 2026-05-26
KZR931 Air Astana 5 2026-05-25
KZR922 Air Astana 5 2026-05-13
KZR162 Air Astana 5 2026-04-25
KZR918 Air Astana 4 2026-05-19
KZR585 Air Astana 4 2026-05-28
KZR193 Air Astana 4 2026-04-24
KZR161 Air Astana 3 2026-04-17
KZR934 Air Astana 2 2026-05-29
KZR917 Air Astana 2 2026-05-18
KZR604 Air Astana 2 2026-05-21
KZR268 Air Astana 2 2026-05-04
KZR267 Air Astana 2 2026-05-04
KZR222 - 2 2026-04-18
KZR2100 Air Astana 2 2026-05-17
KZR140 Air Astana 2 2026-04-27

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-05-29 KZR934 BKK → ALA May 29, 11:35 UTCMay 29, 23:45 UTC12h 10m
2026-05-29 KZR933 ALA → BKK May 29, 05:40 UTCMay 29, 10:00 UTC4h 20m
2026-05-28 KZR933 ALA → BKK May 28, 12:20 UTCMay 29, 10:00 UTC21h 40m
2026-05-28 KZR933 ALA → BKK May 28, 10:40 UTCMay 29, 10:00 UTC23h 20m
2026-05-28 KZR585 ALA → MLE May 28, 02:10 UTCMay 28, 12:30 UTC10h 20m
2026-05-27 KZR585 ALA → MLE May 27, 14:20 UTCMay 28, 12:30 UTC22h 10m
2026-05-27 KZR646 PQC → ALA May 27, 12:30 UTCMay 28, 12:15 UTC23h 45m
2026-05-27 KZR646 PQC → ALA May 27, 11:35 UTCMay 28, 05:35 UTC18h 0m
2026-05-27 KZR646 PQC → ALA May 27, 06:20 UTCMay 28, 05:35 UTC23h 15m
2026-05-27 KZR646 PQC → ALA May 27, 04:19 UTCMay 28, 03:00 UTC22h 40m
2026-05-27 KZR646 PQC → ALA May 27, 03:39 UTCMay 28, 02:15 UTC22h 35m
2026-05-26 KZR646 PQC → ALA May 26, 20:20 UTCMay 27, 16:15 UTC19h 56m
2026-05-26 KZR932 BKK → ALA May 26, 03:35 UTCMay 26, 18:24 UTC14h 50m
2026-05-25 KZR931 ALA → BKK May 25, 09:00 UTCMay 26, 01:40 UTC16h 39m
2026-05-24 KZR932 BKK → ALA May 24, 05:45 UTCMay 24, 10:05 UTC4h 20m
2026-05-23 KZR931 ALA → BKK May 23, 21:35 UTCMay 24, 01:35 UTC4h 0m
2026-05-22 KZR934 BKK → ALA May 22, 11:40 UTCMay 22, 16:00 UTC4h 20m
2026-05-22 KZR933 ALA → BKK May 22, 05:35 UTCMay 22, 09:45 UTC4h 10m
2026-05-21 KZR604 HKT → ALA May 21, 06:45 UTCMay 22, 06:15 UTC23h 30m
2026-05-20 KZR604 HKT → ALA May 20, 20:20 UTCMay 21, 08:15 UTC11h 55m
2026-05-19 KZR918 IST → NQZ May 19, 10:15 UTCMay 19, 11:30 UTC1h 15m
2026-05-18 KZR917 NQZ → IST May 18, 12:40 UTCMay 19, 06:10 UTC17h 29m
2026-05-18 KZR917 NQZ → IST May 18, 08:01 UTCMay 19, 06:10 UTC22h 9m
2026-05-18 KZR210 ICN → NQZ May 18, 06:40 UTCMay 18, 07:00 UTC20m
2026-05-18 KZR209 NQZ → ICN May 18, 03:05 UTCMay 18, 03:30 UTC25m
2026-05-17 KZR2100 ICN → NQZ May 17, 06:40 UTCMay 18, 02:15 UTC19h 35m
2026-05-17 KZR2090 NQZ → ICN May 17, 03:15 UTCMay 17, 03:40 UTC25m
2026-05-16 KZR918 IST → NQZ May 16, 04:30 UTCMay 16, 11:55 UTC7h 26m
2026-05-14 KZR918 IST → NQZ May 14, 09:25 UTCMay 14, 11:20 UTC1h 55m
2026-05-13 KZR922 FRA → NQZ May 13, 14:35 UTCMay 14, 06:05 UTC15h 30m
2026-05-13 KZR921 NQZ → FRA May 13, 07:40 UTCMay 13, 11:30 UTC3h 50m
2026-05-12 KZR921 NQZ → FRA May 12, 10:20 UTCMay 13, 10:15 UTC23h 55m
2026-05-12 KZR918 IST → NQZ May 12, 10:10 UTCMay 13, 08:15 UTC22h 5m
2026-05-11 KZR922 FRA → NQZ May 11, 16:20 UTCMay 12, 11:30 UTC19h 11m
2026-05-11 KZR922 FRA → NQZ May 11, 14:20 UTCMay 12, 11:30 UTC21h 11m
2026-05-11 KZR922 FRA → NQZ May 11, 14:10 UTCMay 12, 11:30 UTC21h 21m
2026-05-10 KZR921 NQZ → FRA May 10, 20:35 UTCMay 11, 11:45 UTC15h 10m
2026-05-10 KZR119 NQZ → TBS May 10, 18:05 UTCMay 10, 19:15 UTC1h 10m
2026-05-10 KZR2100 ICN → NQZ May 10, 06:50 UTCMay 10, 07:04 UTC15m
2026-05-08 KZR922 FRA → NQZ May 8, 18:35 UTCMay 8, 22:35 UTC4h 0m
2026-05-08 KZR921 NQZ → FRA May 8, 12:10 UTCMay 8, 16:50 UTC4h 40m
2026-05-07 KZR921 NQZ → FRA May 7, 20:25 UTCMay 8, 16:50 UTC20h 25m
2026-05-07 KZR921 NQZ → FRA May 7, 19:50 UTCMay 8, 16:50 UTC21h 0m
2026-05-07 KZR911 ALA → IST May 7, 06:45 UTCMay 7, 16:20 UTC9h 35m
2026-05-06 KZR907 ALA → DEL May 6, 19:55 UTCMay 7, 05:05 UTC9h 10m
2026-05-05 KZR911 ALA → IST May 5, 23:35 UTCMay 6, 16:10 UTC16h 35m
2026-05-05 KZR911 ALA → IST May 5, 18:00 UTCMay 6, 16:10 UTC22h 10m
2026-05-04 KZR268 PEK → ALA May 4, 22:20 UTCMay 5, 18:10 UTC19h 50m
2026-05-04 KZR267 ALA → PEK May 4, 20:30 UTCMay 4, 20:45 UTC15m
2026-05-03 KZR268 PEK → ALA May 3, 22:54 UTCMay 3, 23:20 UTC25m

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 8h 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 KZR911, KZR921, KZR646, KZR933, KZR932.