Apparatus

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sensors Mode-S transponder

4CAC0F

ICAO 24-bit transponder address · allocated to Ireland

Currently assigned to EI-KEC · BOEING 767-300

Hex
4CAC0F
Octal
23126017
Decimal
5,024,783
Country
IE
Tail
EI-KEC
Type
B763
No current signal · last broadcast 1h ago
Flights observed
162
Distinct callsigns
11
Country
IE
Last broadcast
1h ago

Last known position

Most recent position reported by Mode-S 4CAC0F.

Country allocation

The ICAO 24-bit address 4CAC0F 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 11 distinct

Callsign Airline Flights Last seen
KZR921 - 75 2026-07-06
KZR564 Air Astana 26 2026-05-08
KZR915 - 18 2026-07-13
KZR563 Air Astana 13 2026-05-03
KZR922 - 7 2026-07-07
KZR909 - 7 2026-07-14
KZR916 - 5 2026-07-09
KZR910 - 4 2026-07-10
KZR604 Air Astana 3 2026-05-07
KZR603 Air Astana 3 2026-05-06
KZR188 Air Astana 1 2026-04-20

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 KZR909 - Jul 14, 00:20 UTCJul 14, 00:40 UTC20m
2026-07-13 KZR909 - Jul 13, 11:00 UTCJul 13, 23:25 UTC12h 25m
2026-07-13 KZR915 - Jul 13, 07:01 UTCJul 13, 09:35 UTC2h 35m
2026-07-12 KZR915 - Jul 12, 11:50 UTCJul 13, 09:35 UTC21h 45m
2026-07-12 KZR915 - Jul 12, 07:40 UTCJul 12, 10:10 UTC2h 30m
2026-07-11 KZR915 - Jul 11, 11:10 UTCJul 12, 09:45 UTC22h 35m
2026-07-11 KZR915 - Jul 11, 07:05 UTCJul 11, 09:35 UTC2h 30m
2026-07-10 KZR910 - Jul 10, 02:35 UTCJul 10, 04:10 UTC1h 35m
2026-07-10 KZR909 - Jul 10, 00:00 UTCJul 10, 00:20 UTC20m
2026-07-09 KZR916 - Jul 9, 11:35 UTCJul 9, 23:10 UTC11h 35m
2026-07-09 KZR915 - Jul 9, 07:15 UTCJul 9, 09:45 UTC2h 30m
2026-07-07 KZR922 - Jul 7, 16:40 UTCJul 7, 20:30 UTC3h 50m
2026-07-06 KZR921 - Jul 6, 19:50 UTCJul 7, 14:40 UTC18h 50m
2026-07-06 KZR922 FRA → FRA Jul 6, 18:20 UTCJul 7, 14:40 UTC20h 20m
2026-07-05 KZR921 - Jul 5, 19:55 UTCJul 6, 14:40 UTC18h 45m
2026-07-05 KZR921 - Jul 5, 17:50 UTCJul 6, 14:40 UTC20h 50m
2026-07-05 KZR922 FRA → FRA Jul 5, 16:40 UTCJul 6, 14:40 UTC22h 0m
2026-07-04 KZR921 - Jul 4, 19:50 UTCJul 5, 14:35 UTC18h 45m
2026-07-04 KZR921 FRA → FRA Jul 4, 17:40 UTCJul 5, 14:35 UTC20h 55m
2026-07-04 KZR921 - Jul 4, 11:00 UTCJul 4, 15:40 UTC4h 40m
2026-07-03 KZR921 - Jul 3, 17:50 UTCJul 4, 15:40 UTC21h 50m
2026-07-03 KZR921 FRA → FRA Jul 3, 16:55 UTCJul 4, 15:40 UTC22h 45m
2026-07-02 KZR921 - Jul 2, 20:35 UTCJul 3, 14:55 UTC18h 20m
2026-07-02 KZR921 - Jul 2, 17:50 UTCJul 3, 14:55 UTC21h 5m
2026-07-02 KZR921 FRA → FRA Jul 2, 16:50 UTCJul 3, 14:55 UTC22h 5m
2026-07-01 KZR921 - Jul 1, 20:15 UTCJul 2, 14:35 UTC18h 20m
2026-07-01 KZR921 - Jul 1, 17:50 UTCJul 2, 14:35 UTC20h 45m
2026-07-01 KZR921 FRA → FRA Jul 1, 16:55 UTCJul 2, 14:35 UTC21h 40m
2026-07-01 KZR921 - Jul 1, 10:15 UTCJul 1, 14:40 UTC4h 25m
2026-06-30 KZR910 - Jun 30, 04:00 UTCJun 30, 04:20 UTC20m
2026-06-30 KZR910 - Jun 30, 02:45 UTCJun 30, 03:00 UTC15m
2026-06-30 KZR909 - Jun 30, 00:20 UTCJun 30, 00:39 UTC20m
2026-06-29 KZR916 - Jun 29, 11:29 UTCJun 29, 23:25 UTC11h 55m
2026-06-29 KZR915 - Jun 29, 07:20 UTCJun 29, 10:00 UTC2h 40m
2026-06-28 KZR915 - Jun 28, 11:50 UTCJun 29, 10:00 UTC22h 10m
2026-06-28 KZR915 - Jun 28, 07:29 UTCJun 28, 10:00 UTC2h 30m
2026-06-27 KZR915 - Jun 27, 12:39 UTCJun 28, 10:00 UTC21h 20m
2026-06-27 KZR915 - Jun 27, 11:14 UTCJun 28, 09:45 UTC22h 30m
2026-06-27 KZR915 - Jun 27, 07:10 UTCJun 27, 09:34 UTC2h 25m
2026-06-26 KZR910 - Jun 26, 02:34 UTCJun 26, 04:04 UTC1h 30m
2026-06-26 KZR909 - Jun 26, 00:15 UTCJun 26, 00:35 UTC20m
2026-06-25 KZR916 - Jun 25, 11:35 UTCJun 25, 23:24 UTC11h 50m
2026-06-25 KZR915 - Jun 25, 07:15 UTCJun 25, 09:55 UTC2h 40m
2026-06-23 KZR922 FRA → NQZ Jun 23, 16:39 UTCJun 23, 19:10 UTC2h 30m
2026-06-22 KZR921 - Jun 22, 20:19 UTCJun 23, 14:55 UTC18h 35m
2026-06-22 KZR921 - Jun 22, 17:50 UTCJun 23, 14:55 UTC21h 5m
2026-06-22 KZR922 FRA → NQZ Jun 22, 16:50 UTCJun 23, 14:55 UTC22h 5m
2026-06-22 KZR921 - Jun 22, 10:19 UTCJun 22, 14:59 UTC4h 40m
2026-06-21 KZR921 - Jun 21, 17:50 UTCJun 22, 14:59 UTC21h 10m
2026-06-21 KZR921 FRA → FRA Jun 21, 17:05 UTCJun 22, 14:59 UTC21h 55m

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

Mode-S 4CAC0F frequently asked

What is Mode-S code 4CAC0F?
4CAC0F is an ICAO 24-bit transponder address. Allocated to Ireland. Assigned to EI-KEC.
Where is Mode-S 4CAC0F registered?
Mode-S code 4CAC0F is allocated to Ireland (IE). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 4CAC0F 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 4CAC0F, octal 23126017, decimal 5,024,783.
What flights does 4CAC0F operate?
Mode-S 4CAC0F has broadcast 11 distinct callsigns, including KZR921, KZR564, KZR915, KZR563, KZR922.