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
- Flights observed
- 115
- Distinct callsigns
- 20
- Country
- IE
- Last broadcast
- 5h ago
Last known position
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
| Date | Flight | Route | Takeoff | Landing | Duration |
|---|---|---|---|---|---|
| 2026-05-29 | KZR664 | SCO → ALA | May 29, 18:55 UTC | May 29, 23:30 UTC | 4h 35m |
| 2026-05-28 | KZR663 | SCO → LHR | May 28, 23:30 UTC | May 29, 16:50 UTC | 17h 20m |
| 2026-05-28 | KZR663 | SCO → LHR | May 28, 17:55 UTC | May 29, 15:45 UTC | 21h 50m |
| 2026-05-26 | KZR564 | HKT → ALA | May 26, 21:40 UTC | May 27, 08:30 UTC | 10h 50m |
| 2026-05-25 | KZR912 | IST → ALA | May 25, 19:50 UTC | May 25, 20:59 UTC | 1h 10m |
| 2026-05-25 | KZR912 | IST → ALA | May 25, 18:55 UTC | May 25, 19:05 UTC | 10m |
| 2026-05-25 | KZR911 | ALA → IST | May 25, 16:50 UTC | May 25, 17:00 UTC | 10m |
| 2026-05-24 | KZR911 | ALA → IST | May 24, 23:00 UTC | May 25, 16:05 UTC | 17h 5m |
| 2026-05-24 | KZR193 | ALA → CXR | May 24, 19:50 UTC | May 25, 16:05 UTC | 20h 15m |
| 2026-05-24 | KZR193 | ALA → CXR | May 24, 04:45 UTC | May 24, 23:46 UTC | 19h 1m |
| 2026-05-24 | KZR193 | ALA → CXR | May 24, 02:30 UTC | May 24, 23:46 UTC | 21h 16m |
| 2026-05-23 | KZR585 | ALA → MLE | May 23, 11:05 UTC | May 24, 09:45 UTC | 22h 40m |
| 2026-05-23 | KZR141 | ALA → TBS | May 23, 09:05 UTC | May 23, 09:25 UTC | 20m |
| 2026-05-22 | KZR912 | IST → ALA | May 22, 20:25 UTC | May 22, 21:00 UTC | 35m |
| 2026-05-22 | KZR912 | IST → ALA | May 22, 19:00 UTC | May 22, 19:10 UTC | 10m |
| 2026-05-22 | KZR911 | ALA → IST | May 22, 17:00 UTC | May 22, 17:15 UTC | 15m |
| 2026-05-22 | KZR911 | ALA → IST | May 22, 15:00 UTC | May 22, 16:15 UTC | 1h 15m |
| 2026-05-21 | KZR586 | MLE → ALA | May 21, 01:55 UTC | May 21, 12:30 UTC | 10h 35m |
| 2026-05-20 | KZR586 | MLE → ALA | May 20, 15:50 UTC | May 21, 12:30 UTC | 20h 40m |
| 2026-05-20 | KZR646 | PQC → ALA | May 20, 11:50 UTC | May 21, 11:45 UTC | 23h 55m |
| 2026-05-20 | KZR646 | PQC → ALA | May 20, 11:25 UTC | May 21, 09:45 UTC | 22h 20m |
| 2026-05-19 | KZR645 | ALA → PQC | May 19, 19:20 UTC | May 20, 08:30 UTC | 13h 11m |
| 2026-05-19 | KZR911 | ALA → IST | May 19, 17:10 UTC | May 19, 17:20 UTC | 10m |
| 2026-05-19 | KZR932 | BKK → ALA | May 19, 03:25 UTC | May 19, 16:20 UTC | 12h 55m |
| 2026-05-18 | KZR646 | PQC → ALA | May 18, 08:10 UTC | May 19, 01:45 UTC | 17h 34m |
| 2026-05-17 | KZR645 | ALA → PQC | May 17, 13:25 UTC | May 18, 05:00 UTC | 15h 35m |
| 2026-05-16 | KZR157 | NQZ → CXR | May 16, 21:05 UTC | May 17, 13:55 UTC | 16h 50m |
| 2026-05-16 | KZR157 | NQZ → CXR | May 16, 02:25 UTC | May 17, 01:15 UTC | 22h 50m |
| 2026-05-15 | KZR584 | SYX → NQZ | May 15, 12:55 UTC | May 15, 13:25 UTC | 30m |
| 2026-05-14 | KZR158 | CXR → NQZ | May 14, 15:55 UTC | May 15, 13:25 UTC | 21h 30m |
| 2026-05-14 | KZR157 | NQZ → CXR | May 14, 02:00 UTC | May 14, 16:25 UTC | 14h 25m |
| 2026-05-12 | KZR120 | TBS → NQZ | May 12, 20:25 UTC | May 12, 21:30 UTC | 1h 5m |
| 2026-05-12 | KZR119 | NQZ → TBS | May 12, 17:45 UTC | May 12, 18:55 UTC | 1h 10m |
| 2026-05-09 | KZR222 | FRA → ALA | May 9, 16:55 UTC | May 9, 19:10 UTC | 2h 15m |
| 2026-05-08 | KZR221 | ALA → FRA | May 8, 19:50 UTC | May 9, 15:05 UTC | 19h 15m |
| 2026-05-08 | KZR664 | SCO → ALA | May 8, 18:20 UTC | May 9, 15:05 UTC | 20h 45m |
| 2026-05-07 | KZR663 | SCO → LHR | May 7, 23:59 UTC | May 8, 16:30 UTC | 16h 30m |
| 2026-05-07 | KZR663 | SCO → LHR | May 7, 18:10 UTC | May 8, 16:30 UTC | 22h 20m |
| 2026-05-06 | KZR268 | PEK → ALA | May 6, 22:25 UTC | May 7, 18:25 UTC | 20h 0m |
| 2026-05-06 | KZR267 | ALA → PEK | May 6, 20:30 UTC | May 6, 20:45 UTC | 15m |
| 2026-05-06 | KZR142 | TBS → ALA | May 6, 10:35 UTC | May 6, 11:00 UTC | 25m |
| 2026-05-05 | KZR141 | ALA → TBS | May 5, 22:10 UTC | May 6, 09:15 UTC | 11h 5m |
| 2026-05-05 | KZR267 | ALA → PEK | May 5, 20:20 UTC | May 5, 20:35 UTC | 15m |
| 2026-05-04 | KZR222 | FRA → ALA | May 4, 16:45 UTC | May 4, 20:55 UTC | 4h 11m |
| 2026-05-03 | KZR221 | ALA → FRA | May 3, 19:50 UTC | May 4, 14:35 UTC | 18h 45m |
| 2026-05-03 | KZR221 | ALA → FRA | May 3, 17:50 UTC | May 4, 14:35 UTC | 20h 45m |
| 2026-05-03 | KZR664 | SCO → ALA | May 3, 17:20 UTC | May 4, 14:35 UTC | 21h 15m |
| 2026-05-02 | KZR663 | SCO → LHR | May 2, 19:50 UTC | May 3, 15:40 UTC | 19h 49m |
| 2026-05-02 | KZR663 | SCO → LHR | May 2, 17:50 UTC | May 3, 15:40 UTC | 21h 49m |
| 2026-05-02 | KZR663 | SCO → LHR | May 2, 17:30 UTC | May 3, 15:40 UTC | 22h 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 .