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
- Flights observed
- 192
- Distinct callsigns
- 11
- Country
- IE
- Last broadcast
- Jul 26, 14:35 UTC
Last known position
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 | - | 92 | 2026-07-21 |
| KZR564 | Air Astana | 26 | 2026-05-08 |
| KZR915 | Air Astana | 23 | 2026-07-26 |
| KZR563 | Air Astana | 13 | 2026-05-03 |
| KZR922 | - | 9 | 2026-07-21 |
| KZR916 | Air Astana | 8 | 2026-07-26 |
| KZR909 | Air Astana | 8 | 2026-07-24 |
| KZR910 | Air Astana | 6 | 2026-07-24 |
| 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
| Date | Flight | Route | Takeoff | Landing | Duration |
|---|---|---|---|---|---|
| 2026-07-26 | KZR916 | AYT → ALA | Jul 26, 12:45 UTC | Jul 26, 14:35 UTC | 1h 50m |
| 2026-07-26 | KZR915 | ALA → AYT | Jul 26, 08:40 UTC | Jul 26, 11:15 UTC | 2h 35m |
| 2026-07-25 | KZR915 | ALA → AYT | Jul 25, 12:05 UTC | Jul 26, 11:15 UTC | 23h 11m |
| 2026-07-25 | KZR916 | AYT → ALA | Jul 25, 11:15 UTC | Jul 26, 09:45 UTC | 22h 31m |
| 2026-07-25 | KZR915 | ALA → AYT | Jul 25, 09:15 UTC | Jul 25, 09:35 UTC | 20m |
| 2026-07-25 | KZR915 | ALA → AYT | Jul 25, 07:00 UTC | Jul 25, 08:30 UTC | 1h 30m |
| 2026-07-24 | KZR910 | ICN → ALA | Jul 24, 03:15 UTC | Jul 24, 04:45 UTC | 1h 30m |
| 2026-07-24 | KZR909 | ALA → ICN | Jul 24, 00:30 UTC | Jul 24, 00:50 UTC | 20m |
| 2026-07-23 | KZR916 | AYT → ALA | Jul 23, 11:10 UTC | Jul 23, 23:40 UTC | 12h 30m |
| 2026-07-23 | KZR915 | - | Jul 23, 07:15 UTC | Jul 23, 09:45 UTC | 2h 30m |
| 2026-07-21 | KZR922 | - | Jul 21, 16:45 UTC | Jul 21, 20:35 UTC | 3h 50m |
| 2026-07-21 | KZR921 | - | Jul 21, 10:10 UTC | Jul 21, 14:55 UTC | 4h 45m |
| 2026-07-20 | KZR921 | FRA → FRA | Jul 20, 17:00 UTC | Jul 21, 14:55 UTC | 21h 54m |
| 2026-07-20 | KZR921 | - | Jul 20, 10:15 UTC | Jul 20, 14:55 UTC | 4h 40m |
| 2026-07-19 | KZR921 | - | Jul 19, 17:50 UTC | Jul 20, 14:55 UTC | 21h 5m |
| 2026-07-19 | KZR921 | FRA → FRA | Jul 19, 16:55 UTC | Jul 20, 14:55 UTC | 22h 0m |
| 2026-07-18 | KZR921 | - | Jul 18, 20:25 UTC | Jul 19, 15:00 UTC | 18h 35m |
| 2026-07-18 | KZR921 | - | Jul 18, 17:50 UTC | Jul 19, 15:00 UTC | 21h 10m |
| 2026-07-18 | KZR922 | - | Jul 18, 17:00 UTC | Jul 19, 13:45 UTC | 20h 45m |
| 2026-07-17 | KZR921 | - | Jul 17, 19:49 UTC | Jul 18, 15:00 UTC | 19h 11m |
| 2026-07-17 | KZR921 | - | Jul 17, 17:50 UTC | Jul 18, 15:00 UTC | 21h 11m |
| 2026-07-17 | KZR921 | FRA → FRA | Jul 17, 17:35 UTC | Jul 18, 15:00 UTC | 21h 26m |
| 2026-07-16 | KZR921 | - | Jul 16, 20:05 UTC | Jul 17, 14:55 UTC | 18h 50m |
| 2026-07-16 | KZR921 | - | Jul 16, 17:49 UTC | Jul 17, 14:55 UTC | 21h 5m |
| 2026-07-16 | KZR921 | FRA → FRA | Jul 16, 16:55 UTC | Jul 17, 14:55 UTC | 22h 0m |
| 2026-07-15 | KZR921 | - | Jul 15, 20:40 UTC | Jul 16, 14:45 UTC | 18h 5m |
| 2026-07-15 | KZR921 | - | Jul 15, 17:50 UTC | Jul 16, 14:45 UTC | 20h 55m |
| 2026-07-15 | KZR921 | FRA → FRA | Jul 15, 17:00 UTC | Jul 16, 14:45 UTC | 21h 45m |
| 2026-07-15 | KZR921 | - | Jul 15, 10:10 UTC | Jul 15, 14:55 UTC | 4h 45m |
| 2026-07-14 | KZR910 | - | Jul 14, 03:05 UTC | Jul 14, 04:35 UTC | 1h 30m |
| 2026-07-14 | KZR909 | - | Jul 14, 00:20 UTC | Jul 14, 00:40 UTC | 20m |
| 2026-07-13 | KZR909 | - | Jul 13, 11:00 UTC | Jul 13, 23:25 UTC | 12h 25m |
| 2026-07-13 | KZR915 | - | Jul 13, 07:01 UTC | Jul 13, 09:35 UTC | 2h 35m |
| 2026-07-12 | KZR915 | - | Jul 12, 11:50 UTC | Jul 13, 09:35 UTC | 21h 45m |
| 2026-07-12 | KZR915 | - | Jul 12, 07:40 UTC | Jul 12, 10:10 UTC | 2h 30m |
| 2026-07-11 | KZR915 | - | Jul 11, 11:10 UTC | Jul 12, 09:45 UTC | 22h 35m |
| 2026-07-11 | KZR915 | - | Jul 11, 07:05 UTC | Jul 11, 09:35 UTC | 2h 30m |
| 2026-07-10 | KZR910 | - | Jul 10, 02:35 UTC | Jul 10, 04:10 UTC | 1h 35m |
| 2026-07-10 | KZR909 | - | Jul 10, 00:00 UTC | Jul 10, 00:20 UTC | 20m |
| 2026-07-09 | KZR916 | - | Jul 9, 11:35 UTC | Jul 9, 23:10 UTC | 11h 35m |
| 2026-07-09 | KZR915 | - | Jul 9, 07:15 UTC | Jul 9, 09:45 UTC | 2h 30m |
| 2026-07-07 | KZR922 | - | Jul 7, 16:40 UTC | Jul 7, 20:30 UTC | 3h 50m |
| 2026-07-06 | KZR921 | - | Jul 6, 19:50 UTC | Jul 7, 14:40 UTC | 18h 50m |
| 2026-07-06 | KZR922 | FRA → FRA | Jul 6, 18:20 UTC | Jul 7, 14:40 UTC | 20h 20m |
| 2026-07-05 | KZR921 | - | Jul 5, 19:55 UTC | Jul 6, 14:40 UTC | 18h 45m |
| 2026-07-05 | KZR921 | - | Jul 5, 17:50 UTC | Jul 6, 14:40 UTC | 20h 50m |
| 2026-07-05 | KZR922 | FRA → FRA | Jul 5, 16:40 UTC | Jul 6, 14:40 UTC | 22h 0m |
| 2026-07-04 | KZR921 | - | Jul 4, 19:50 UTC | Jul 5, 14:35 UTC | 18h 45m |
| 2026-07-04 | KZR921 | FRA → FRA | Jul 4, 17:40 UTC | Jul 5, 14:35 UTC | 20h 55m |
| 2026-07-04 | KZR921 | - | Jul 4, 11:00 UTC | Jul 4, 15:40 UTC | 4h 40m |
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 .