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 5h ago
Flights observed
115
Distinct callsigns
20
Country
IE
Last broadcast
5h 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 15 2026-05-28
KZR221 Air Astana 11 2026-05-08
KZR664 Air Astana 8 2026-05-29
KZR932 Air Astana 6 2026-05-19
KZR931 Air Astana 5 2026-04-18
KZR911 Air Astana 5 2026-05-25
KZR267 Air Astana 5 2026-05-06
KZR222 Air Astana 5 2026-05-09
KZR912 Air Astana 4 2026-05-25
KZR646 Air Astana 4 2026-05-20
KZR585 Air Astana 4 2026-05-23
KZR142 Air Astana 4 2026-05-06
KZR645 Air Astana 3 2026-05-19
KZR200 - 3 2026-04-14
KZR193 Air Astana 3 2026-05-24
KZR162 Air Astana 3 2026-04-16
KZR161 Air Astana 3 2026-04-15
KZR157 Air Astana 3 2026-05-16
KZR141 Air Astana 3 2026-05-23
KZR139 Air Astana 3 2026-04-27

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-05-29 KZR664 SCO → ALA May 29, 18:55 UTCMay 29, 23:30 UTC4h 35m
2026-05-28 KZR663 SCO → LHR May 28, 23:30 UTCMay 29, 16:50 UTC17h 20m
2026-05-28 KZR663 SCO → LHR May 28, 17:55 UTCMay 29, 15:45 UTC21h 50m
2026-05-26 KZR564 HKT → ALA May 26, 21:40 UTCMay 27, 08:30 UTC10h 50m
2026-05-25 KZR912 IST → ALA May 25, 19:50 UTCMay 25, 20:59 UTC1h 10m
2026-05-25 KZR912 IST → ALA May 25, 18:55 UTCMay 25, 19:05 UTC10m
2026-05-25 KZR911 ALA → IST May 25, 16:50 UTCMay 25, 17:00 UTC10m
2026-05-24 KZR911 ALA → IST May 24, 23:00 UTCMay 25, 16:05 UTC17h 5m
2026-05-24 KZR193 ALA → CXR May 24, 19:50 UTCMay 25, 16:05 UTC20h 15m
2026-05-24 KZR193 ALA → CXR May 24, 04:45 UTCMay 24, 23:46 UTC19h 1m
2026-05-24 KZR193 ALA → CXR May 24, 02:30 UTCMay 24, 23:46 UTC21h 16m
2026-05-23 KZR585 ALA → MLE May 23, 11:05 UTCMay 24, 09:45 UTC22h 40m
2026-05-23 KZR141 ALA → TBS May 23, 09:05 UTCMay 23, 09:25 UTC20m
2026-05-22 KZR912 IST → ALA May 22, 20:25 UTCMay 22, 21:00 UTC35m
2026-05-22 KZR912 IST → ALA May 22, 19:00 UTCMay 22, 19:10 UTC10m
2026-05-22 KZR911 ALA → IST May 22, 17:00 UTCMay 22, 17:15 UTC15m
2026-05-22 KZR911 ALA → IST May 22, 15:00 UTCMay 22, 16:15 UTC1h 15m
2026-05-21 KZR586 MLE → ALA May 21, 01:55 UTCMay 21, 12:30 UTC10h 35m
2026-05-20 KZR586 MLE → ALA May 20, 15:50 UTCMay 21, 12:30 UTC20h 40m
2026-05-20 KZR646 PQC → ALA May 20, 11:50 UTCMay 21, 11:45 UTC23h 55m
2026-05-20 KZR646 PQC → ALA May 20, 11:25 UTCMay 21, 09:45 UTC22h 20m
2026-05-19 KZR645 ALA → PQC May 19, 19:20 UTCMay 20, 08:30 UTC13h 11m
2026-05-19 KZR911 ALA → IST May 19, 17:10 UTCMay 19, 17:20 UTC10m
2026-05-19 KZR932 BKK → ALA May 19, 03:25 UTCMay 19, 16:20 UTC12h 55m
2026-05-18 KZR646 PQC → ALA May 18, 08:10 UTCMay 19, 01:45 UTC17h 34m
2026-05-17 KZR645 ALA → PQC May 17, 13:25 UTCMay 18, 05:00 UTC15h 35m
2026-05-16 KZR157 NQZ → CXR May 16, 21:05 UTCMay 17, 13:55 UTC16h 50m
2026-05-16 KZR157 NQZ → CXR May 16, 02:25 UTCMay 17, 01:15 UTC22h 50m
2026-05-15 KZR584 SYX → NQZ May 15, 12:55 UTCMay 15, 13:25 UTC30m
2026-05-14 KZR158 CXR → NQZ May 14, 15:55 UTCMay 15, 13:25 UTC21h 30m
2026-05-14 KZR157 NQZ → CXR May 14, 02:00 UTCMay 14, 16:25 UTC14h 25m
2026-05-12 KZR120 TBS → NQZ May 12, 20:25 UTCMay 12, 21:30 UTC1h 5m
2026-05-12 KZR119 NQZ → TBS May 12, 17:45 UTCMay 12, 18:55 UTC1h 10m
2026-05-09 KZR222 FRA → ALA May 9, 16:55 UTCMay 9, 19:10 UTC2h 15m
2026-05-08 KZR221 ALA → FRA May 8, 19:50 UTCMay 9, 15:05 UTC19h 15m
2026-05-08 KZR664 SCO → ALA May 8, 18:20 UTCMay 9, 15:05 UTC20h 45m
2026-05-07 KZR663 SCO → LHR May 7, 23:59 UTCMay 8, 16:30 UTC16h 30m
2026-05-07 KZR663 SCO → LHR May 7, 18:10 UTCMay 8, 16:30 UTC22h 20m
2026-05-06 KZR268 PEK → ALA May 6, 22:25 UTCMay 7, 18:25 UTC20h 0m
2026-05-06 KZR267 ALA → PEK May 6, 20:30 UTCMay 6, 20:45 UTC15m
2026-05-06 KZR142 TBS → ALA May 6, 10:35 UTCMay 6, 11:00 UTC25m
2026-05-05 KZR141 ALA → TBS May 5, 22:10 UTCMay 6, 09:15 UTC11h 5m
2026-05-05 KZR267 ALA → PEK May 5, 20:20 UTCMay 5, 20:35 UTC15m
2026-05-04 KZR222 FRA → ALA May 4, 16:45 UTCMay 4, 20:55 UTC4h 11m
2026-05-03 KZR221 ALA → FRA May 3, 19:50 UTCMay 4, 14:35 UTC18h 45m
2026-05-03 KZR221 ALA → FRA May 3, 17:50 UTCMay 4, 14:35 UTC20h 45m
2026-05-03 KZR664 SCO → ALA May 3, 17:20 UTCMay 4, 14:35 UTC21h 15m
2026-05-02 KZR663 SCO → LHR May 2, 19:50 UTCMay 3, 15:40 UTC19h 49m
2026-05-02 KZR663 SCO → LHR May 2, 17:50 UTCMay 3, 15:40 UTC21h 49m
2026-05-02 KZR663 SCO → LHR May 2, 17:30 UTCMay 3, 15:40 UTC22h 9m

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 5h 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, KZR221, KZR664, KZR932, KZR931.