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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 Jul 26, 21:45 UTC
Flights observed
263
Distinct callsigns
20
Country
IE
Last broadcast
Jul 26, 21:45 UTC

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 18 2026-07-25
KZR221 Air Astana 14 2026-07-25
KZR157 - 14 2026-07-11
KZR917 Air Astana 13 2026-07-21
KZR260 Air Astana 12 2026-07-20
KZR931 Air Astana 11 2026-06-08
KZR664 Air Astana 10 2026-07-26
KZR158 - 10 2026-07-16
KZR932 Air Astana 9 2026-06-09
KZR911 Air Astana 7 2026-06-09
KZR222 Air Astana 7 2026-07-02
KZR209 - 7 2026-07-19
KZR200 - 7 2026-07-15
KZR912 Air Astana 6 2026-06-09
KZR563 Air Astana 6 2026-07-23
KZR267 - 6 2026-07-01
KZR229 - 6 2026-06-27
KZR210 - 6 2026-07-20
KZR199 - 6 2026-07-15
KZR119 Air Astana 6 2026-07-17

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 KZR664 SCO → ALA Jul 26, 17:25 UTCJul 26, 21:45 UTC4h 20m
2026-07-25 KZR663 SCO → LHR Jul 25, 17:50 UTCJul 26, 15:30 UTC21h 41m
2026-07-25 KZR663 SCO → LHR Jul 25, 17:15 UTCJul 26, 15:30 UTC22h 16m
2026-07-25 KZR221 ALA → FRA Jul 25, 10:40 UTCJul 25, 15:15 UTC4h 35m
2026-07-23 KZR563 ALA → HKT Jul 23, 21:35 UTCJul 24, 08:05 UTC10h 30m
2026-07-23 KZR563 ALA → HKT Jul 23, 11:50 UTCJul 24, 08:05 UTC20h 15m
2026-07-23 KZR563 ALA → HKT Jul 23, 09:50 UTCJul 24, 08:05 UTC22h 15m
2026-07-22 KZR637 NQZ → TGD Jul 22, 16:30 UTCJul 23, 07:45 UTC15h 15m
2026-07-22 KZR227 - Jul 22, 13:45 UTCJul 22, 14:05 UTC20m
2026-07-21 KZR918 IST → NQZ Jul 21, 20:00 UTCJul 22, 10:25 UTC14h 25m
2026-07-21 KZR917 NQZ → IST Jul 21, 18:10 UTCJul 21, 18:25 UTC15m
2026-07-20 KZR917 NQZ → IST Jul 20, 23:40 UTCJul 21, 17:20 UTC17h 40m
2026-07-20 KZR260 DAD → NQZ Jul 20, 19:05 UTCJul 21, 09:55 UTC14h 49m
2026-07-20 KZR259 - Jul 20, 05:50 UTCJul 21, 04:35 UTC22h 45m
2026-07-20 KZR210 - Jul 20, 01:30 UTCJul 20, 23:45 UTC22h 15m
2026-07-20 KZR210 - Jul 20, 00:15 UTCJul 20, 00:40 UTC25m
2026-07-19 KZR209 - Jul 19, 21:35 UTCJul 19, 22:05 UTC30m
2026-07-19 KZR209 - Jul 19, 02:15 UTCJul 19, 20:50 UTC18h 35m
2026-07-19 KZR210 - Jul 19, 01:00 UTCJul 19, 20:50 UTC19h 50m
2026-07-18 KZR209 - Jul 18, 22:35 UTCJul 18, 23:00 UTC25m
2026-07-18 KZR209 - Jul 18, 04:10 UTCJul 18, 21:50 UTC17h 40m
2026-07-17 KZR209 - Jul 17, 23:50 UTCJul 18, 21:50 UTC22h 1m
2026-07-17 KZR120 TBS → NQZ Jul 17, 14:04 UTCJul 18, 04:25 UTC14h 21m
2026-07-17 KZR119 NQZ → TBS Jul 17, 12:15 UTCJul 17, 12:50 UTC35m
2026-07-16 KZR119 NQZ → TBS Jul 16, 14:40 UTCJul 17, 12:50 UTC22h 10m
2026-07-16 KZR158 - Jul 16, 05:35 UTCJul 16, 15:05 UTC9h 30m
2026-07-15 KZR158 - Jul 15, 19:15 UTCJul 16, 15:05 UTC19h 50m
2026-07-15 KZR200 - Jul 15, 10:45 UTCJul 16, 05:45 UTC19h 0m
2026-07-15 KZR200 - Jul 15, 08:15 UTCJul 16, 05:45 UTC21h 30m
2026-07-15 KZR199 - Jul 15, 00:35 UTCJul 15, 19:40 UTC19h 5m
2026-07-14 KZR199 - Jul 14, 07:50 UTCJul 15, 04:10 UTC20h 19m
2026-07-14 KZR199 - Jul 14, 06:05 UTCJul 15, 04:10 UTC22h 4m
2026-07-14 KZR260 - Jul 14, 04:25 UTCJul 15, 03:45 UTC23h 19m
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

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 Jul 26, 21:45 UTC.
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, KZR157, KZR917, KZR260.