Apparatus

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sensors Mode-S transponder

4CAF11

ICAO 24-bit transponder address · allocated to Ireland

Hex
4CAF11
Octal
23127421
Decimal
5,025,553
Country
IE
No current signal · last broadcast 1h ago
Flights observed
68
Distinct callsigns
20
Country
IE
Last broadcast
1h ago

Last known position

Most recent position reported by Mode-S 4CAF11.

Country allocation

The ICAO 24-bit address 4CAF11 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
KZR926 Air Astana 9 2026-06-23
KZR925 Air Astana 9 2026-06-23
KZR659 Air Astana 8 2026-06-19
KZR554 - 8 2026-06-15
KZR553 - 8 2026-06-14
KZR589 - 4 2026-06-21
KZR660 Air Astana 3 2026-06-19
KZR916 - 2 2026-06-24
KZR915 - 2 2026-06-23
KZR859 Air Astana 2 2026-06-10
KZR590 - 2 2026-06-22
KZR216 Air Astana 2 2026-05-31
KZR963 Air Astana 1 2026-06-21
KZR918 Air Astana 1 2026-05-28
KZR917 Air Astana 1 2026-05-28
KZR860 Air Astana 1 2026-05-09
KZR558 Air Astana 1 2026-05-19
KZR557 - 1 2026-05-18
KZR215 Air Astana 1 2026-05-24
AYN7154 - 1 2026-04-17

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-06-24 KZR916 - Jun 24, 11:05 UTCJun 24, 12:14 UTC1h 10m
2026-06-23 KZR915 - Jun 23, 20:10 UTCJun 24, 09:24 UTC13h 15m
2026-06-23 KZR926 AYT → ALA Jun 23, 09:24 UTCJun 23, 18:39 UTC9h 15m
2026-06-23 KZR925 ALA → AYT Jun 23, 05:24 UTCJun 23, 07:49 UTC2h 25m
2026-06-22 KZR925 ALA → AYT Jun 22, 10:19 UTCJun 23, 07:49 UTC21h 30m
2026-06-22 KZR590 - Jun 22, 08:40 UTCJun 23, 06:09 UTC21h 30m
2026-06-21 KZR589 - Jun 21, 20:24 UTCJun 22, 06:39 UTC10h 15m
2026-06-21 KZR963 ALA → DEL Jun 21, 17:50 UTCJun 21, 18:39 UTC50m
2026-06-20 KZR926 AYT → ALA Jun 20, 08:19 UTCJun 20, 10:04 UTC1h 45m
2026-06-19 KZR660 BJV → ALA Jun 19, 13:20 UTCJun 20, 06:24 UTC17h 5m
2026-06-19 KZR659 ALA → BJV Jun 19, 08:54 UTCJun 19, 11:30 UTC2h 35m
2026-06-18 KZR659 ALA → BJV Jun 18, 14:20 UTCJun 19, 11:30 UTC21h 9m
2026-06-18 KZR659 ALA → BJV Jun 18, 13:35 UTCJun 19, 11:30 UTC21h 54m
2026-06-18 KZR659 ALA → BJV Jun 18, 10:35 UTCJun 19, 10:14 UTC23h 39m
2026-06-18 KZR589 - Jun 18, 08:45 UTCJun 18, 15:20 UTC6h 35m
2026-06-17 KZR589 - Jun 17, 10:20 UTCJun 18, 10:05 UTC23h 45m
2026-06-17 KZR926 AYT → ALA Jun 17, 09:15 UTCJun 17, 11:15 UTC2h 0m
2026-06-17 KZR925 ALA → AYT Jun 17, 07:20 UTCJun 17, 07:45 UTC25m
2026-06-16 KZR660 BJV → ALA Jun 16, 13:04 UTCJun 17, 06:45 UTC17h 41m
2026-06-16 KZR659 ALA → BJV Jun 16, 08:49 UTCJun 16, 11:25 UTC2h 35m
2026-06-15 KZR659 ALA → BJV Jun 15, 14:24 UTCJun 16, 11:25 UTC21h 0m
2026-06-15 KZR554 - Jun 15, 12:19 UTCJun 16, 11:25 UTC23h 5m
2026-06-15 KZR554 - Jun 15, 12:05 UTCJun 16, 10:09 UTC22h 5m
2026-06-15 KZR554 - Jun 15, 07:10 UTCJun 15, 15:00 UTC7h 50m
2026-06-14 KZR553 - Jun 14, 10:35 UTCJun 15, 10:00 UTC23h 24m
2026-06-14 KZR926 AYT → ALA Jun 14, 09:45 UTCJun 15, 08:15 UTC22h 30m
2026-06-13 KZR925 ALA → AYT Jun 13, 20:10 UTCJun 14, 08:10 UTC12h 0m
2026-06-13 KZR926 AYT → ALA Jun 13, 08:15 UTCJun 13, 18:25 UTC10h 10m
2026-06-13 KZR925 ALA → AYT Jun 13, 06:05 UTCJun 13, 06:25 UTC20m
2026-06-13 KZR925 ALA → AYT Jun 13, 04:00 UTCJun 13, 04:45 UTC45m
2026-06-12 KZR926 AYT → ALA Jun 12, 09:15 UTCJun 12, 18:20 UTC9h 5m
2026-06-11 KZR590 - Jun 11, 13:20 UTCJun 12, 07:45 UTC18h 26m
2026-06-10 KZR589 - Jun 10, 20:25 UTCJun 11, 11:15 UTC14h 50m
2026-06-10 KZR859 ALA → SCO Jun 10, 18:35 UTCJun 10, 18:45 UTC10m
2026-06-10 KZR926 AYT → ALA Jun 10, 09:20 UTCJun 10, 11:10 UTC1h 50m
2026-06-10 KZR925 ALA → AYT Jun 10, 05:30 UTCJun 10, 07:40 UTC2h 10m
2026-06-08 KZR554 - Jun 8, 07:30 UTCJun 8, 14:55 UTC7h 25m
2026-06-07 KZR554 - Jun 7, 19:50 UTCJun 8, 14:55 UTC19h 5m
2026-06-07 KZR926 AYT → ALA Jun 7, 09:10 UTCJun 7, 11:10 UTC2h 0m
2026-06-07 KZR925 ALA → AYT Jun 7, 05:35 UTCJun 7, 07:35 UTC2h 0m
2026-06-05 KZR926 AYT → ALA Jun 5, 09:25 UTCJun 5, 11:25 UTC2h 0m
2026-06-04 KZR925 ALA → AYT Jun 4, 20:10 UTCJun 5, 08:00 UTC11h 50m
2026-06-04 KZR859 ALA → SCO Jun 4, 18:05 UTCJun 4, 18:45 UTC40m
2026-06-03 KZR916 AYT → ALA Jun 3, 11:00 UTCJun 3, 13:05 UTC2h 5m
2026-06-02 KZR915 ALA → AYT Jun 2, 14:20 UTCJun 3, 09:25 UTC19h 5m
2026-06-02 KZR660 BJV → ALA Jun 2, 13:05 UTCJun 3, 09:25 UTC20h 20m
2026-06-01 KZR659 ALA → BJV Jun 1, 16:20 UTCJun 2, 11:35 UTC19h 15m
2026-06-01 KZR659 ALA → BJV Jun 1, 14:20 UTCJun 2, 11:35 UTC21h 15m
2026-06-01 KZR554 - Jun 1, 13:55 UTCJun 2, 11:35 UTC21h 40m
2026-06-01 KZR554 - Jun 1, 10:40 UTCJun 2, 10:15 UTC23h 35m

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.

Mode-S 4CAF11 frequently asked

What is Mode-S code 4CAF11?
4CAF11 is an ICAO 24-bit transponder address. Allocated to Ireland.
Where is Mode-S 4CAF11 registered?
Mode-S code 4CAF11 is allocated to Ireland (IE). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 4CAF11 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 4CAF11, octal 23127421, decimal 5,025,553.
What flights does 4CAF11 operate?
Mode-S 4CAF11 has broadcast 20 distinct callsigns, including KZR926, KZR925, KZR659, KZR554, KZR553.