Apparatus

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sensors Mode-S transponder

4CAD1F

ICAO 24-bit transponder address · allocated to Ireland

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

Hex
4CAD1F
Octal
23126437
Decimal
5,025,055
Country
IE
Tail
EI-KGI
Type
A21N
No current signal · last broadcast 10h ago
Flights observed
230
Distinct callsigns
20
Country
IE
Last broadcast
10h ago

Last known position

Most recent position reported by Mode-S 4CAD1F.

Country allocation

The ICAO 24-bit address 4CAD1F 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
KZR663 Air Astana 16 2026-05-31
KZR157 - 14 2026-07-11
KZR221 - 13 2026-07-01
KZR931 Air Astana 11 2026-06-08
KZR917 Air Astana 11 2026-07-11
KZR260 - 10 2026-07-13
KZR932 Air Astana 9 2026-06-09
KZR664 Air Astana 9 2026-05-31
KZR158 - 8 2026-07-08
KZR911 Air Astana 7 2026-06-09
KZR222 Air Astana 7 2026-07-02
KZR912 Air Astana 6 2026-06-09
KZR267 - 6 2026-07-01
KZR229 - 6 2026-06-27
KZR584 Air Astana 5 2026-06-18
KZR200 - 5 2026-06-24
KZR646 Air Astana 4 2026-05-20
KZR636 Air Astana 4 2026-07-03
KZR585 Air Astana 4 2026-05-23
KZR583 - 4 2026-07-09

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-13 KZR260 - Jul 13, 13:50 UTCJul 14, 08:05 UTC18h 15m
2026-07-13 KZR260 - Jul 13, 13:25 UTCJul 14, 08:05 UTC18h 40m
2026-07-12 KZR918 - Jul 12, 20:15 UTCJul 13, 11:50 UTC15h 35m
2026-07-11 KZR917 NQZ → IST Jul 11, 23:55 UTCJul 12, 17:40 UTC17h 45m
2026-07-11 KZR917 NQZ → IST Jul 11, 19:15 UTCJul 12, 17:40 UTC22h 25m
2026-07-11 KZR157 - Jul 11, 09:50 UTCJul 12, 05:50 UTC20h 0m
2026-07-11 KZR157 - Jul 11, 09:30 UTCJul 12, 05:50 UTC20h 20m
2026-07-11 KZR260 - Jul 11, 04:40 UTCJul 12, 00:10 UTC19h 30m
2026-07-11 KZR260 - Jul 11, 00:10 UTCJul 11, 19:40 UTC19h 30m
2026-07-10 KZR260 - Jul 10, 19:50 UTCJul 11, 19:40 UTC23h 50m
2026-07-10 KZR260 - Jul 10, 19:25 UTCJul 11, 10:05 UTC14h 40m
2026-07-10 KZR260 - Jul 10, 14:15 UTCJul 11, 10:05 UTC19h 50m
2026-07-10 KZR119 NQZ → TBS Jul 10, 06:40 UTCJul 10, 13:05 UTC6h 25m
2026-07-09 KZR119 NQZ → TBS Jul 9, 16:50 UTCJul 10, 13:05 UTC20h 15m
2026-07-09 KZR583 - Jul 9, 10:20 UTCJul 10, 07:10 UTC20h 50m
2026-07-08 KZR158 - Jul 8, 23:50 UTCJul 9, 17:20 UTC17h 30m
2026-07-08 KZR158 - Jul 8, 19:10 UTCJul 9, 17:20 UTC22h 10m
2026-07-08 KZR157 - Jul 8, 05:35 UTCJul 9, 00:00 UTC18h 25m
2026-07-06 KZR210 - Jul 6, 02:45 UTCJul 6, 07:35 UTC4h 50m
2026-07-06 KZR210 - Jul 6, 01:25 UTCJul 6, 01:50 UTC25m
2026-07-05 KZR209 - Jul 5, 22:45 UTCJul 5, 23:05 UTC20m
2026-07-05 KZR638 TGD → NQZ Jul 5, 10:05 UTCJul 5, 21:50 UTC11h 45m
2026-07-04 KZR637 - Jul 4, 22:45 UTCJul 5, 07:15 UTC8h 30m
2026-07-04 KZR228 - Jul 4, 18:40 UTCJul 4, 18:50 UTC10m
2026-07-04 KZR227 - Jul 4, 13:35 UTCJul 4, 13:55 UTC20m
2026-07-04 KZR227 - Jul 4, 09:50 UTCJul 4, 10:10 UTC20m
2026-07-03 KZR636 TGD → ALA Jul 3, 11:50 UTCJul 4, 10:10 UTC22h 20m
2026-07-03 KZR636 TGD → ALA Jul 3, 09:50 UTCJul 3, 12:35 UTC2h 45m
2026-07-02 KZR222 FRA → ALA Jul 2, 16:50 UTCJul 3, 07:45 UTC14h 55m
2026-07-01 KZR221 - Jul 1, 22:35 UTCJul 2, 14:45 UTC16h 10m
2026-07-01 KZR267 - Jul 1, 20:25 UTCJul 1, 20:45 UTC20m
2026-07-01 KZR898 - Jul 1, 10:35 UTCJul 1, 12:50 UTC2h 15m
2026-07-01 KZR897 - Jul 1, 06:30 UTCJul 1, 08:55 UTC2h 25m
2026-06-28 KZR918 - Jun 28, 21:10 UTCJun 28, 23:04 UTC1h 55m
2026-06-28 KZR917 NQZ → IST Jun 28, 18:14 UTCJun 28, 18:34 UTC20m
2026-06-27 KZR917 NQZ → IST Jun 27, 23:55 UTCJun 28, 17:39 UTC17h 45m
2026-06-27 KZR917 NQZ → IST Jun 27, 19:09 UTCJun 28, 17:39 UTC22h 30m
2026-06-27 KZR157 - Jun 27, 07:49 UTCJun 28, 05:45 UTC21h 55m
2026-06-27 KZR157 - Jun 27, 03:49 UTCJun 28, 00:59 UTC21h 10m
2026-06-27 KZR157 - Jun 27, 03:34 UTCJun 28, 00:59 UTC21h 25m
2026-06-27 KZR230 - Jun 27, 02:20 UTCJun 27, 02:39 UTC20m
2026-06-27 KZR229 - Jun 27, 00:14 UTCJun 27, 00:39 UTC25m
2026-06-26 KZR229 - Jun 26, 03:50 UTCJun 26, 23:15 UTC19h 25m
2026-06-26 KZR229 - Jun 26, 03:24 UTCJun 26, 23:15 UTC19h 50m
2026-06-25 KZR158 CXR → NQZ Jun 25, 00:35 UTCJun 25, 15:04 UTC14h 30m
2026-06-24 KZR158 CXR → NQZ Jun 24, 19:00 UTCJun 25, 15:04 UTC20h 5m
2026-06-24 KZR158 CXR → NQZ Jun 24, 10:39 UTCJun 25, 09:10 UTC22h 30m
2026-06-24 KZR158 CXR → NQZ Jun 24, 08:35 UTCJun 25, 07:45 UTC23h 10m
2026-06-24 KZR200 - Jun 24, 03:50 UTCJun 25, 00:49 UTC21h 0m
2026-06-24 KZR200 - Jun 24, 01:49 UTCJun 25, 00:49 UTC23h 0m

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

Mode-S 4CAD1F frequently asked

What is Mode-S code 4CAD1F?
4CAD1F is an ICAO 24-bit transponder address. Allocated to Ireland. Assigned to EI-KGI.
Where is Mode-S 4CAD1F registered?
Mode-S code 4CAD1F is allocated to Ireland (IE). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 4CAD1F broadcasting right now?
No active broadcast right now. Last signal was 10h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 4CAD1F, octal 23126437, decimal 5,025,055.
What flights does 4CAD1F operate?
Mode-S 4CAD1F has broadcast 20 distinct callsigns, including KZR663, KZR157, KZR221, KZR931, KZR917.