sensors Mode-S transponder
4CAF1B
ICAO 24-bit transponder address · allocated to Ireland
Currently assigned to EI-KFI · AIRBUS A-320neo
- Hex
- 4CAF1B
- Octal
- 23127433
- Decimal
- 5,025,563
- Country
- IE
- Tail
- EI-KFI
- Type
- A20N
- Flights observed
- 53
- Distinct callsigns
- 20
- Country
- IE
- Last broadcast
- 1d ago
Last known position
Country allocation
The ICAO 24-bit address 4CAF1B 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 |
|---|---|---|---|
| AYN7111 | - | 7 | 2026-06-27 |
| AYN7476 | - | 5 | 2026-07-02 |
| AYN7475 | - | 5 | 2026-07-02 |
| AYN7112 | - | 4 | 2026-06-27 |
| AYN7951 | - | 3 | 2026-05-25 |
| AYN7819 | - | 3 | 2026-07-01 |
| AYN7818 | - | 3 | 2026-07-06 |
| AYN7817 | - | 3 | 2026-07-06 |
| AYN7952 | - | 2 | 2026-05-25 |
| AYN7820 | - | 2 | 2026-07-01 |
| AYN7078 | - | 2 | 2026-06-22 |
| AYN7077 | - | 2 | 2026-06-22 |
| AYN7993 | - | 1 | 2026-06-02 |
| AYN7906 | - | 1 | 2026-05-23 |
| AYN7905 | - | 1 | 2026-05-23 |
| AYN7676 | - | 1 | 2026-06-07 |
| AYN7606 | - | 1 | 2026-05-27 |
| AYN7605 | - | 1 | 2026-05-27 |
| AYN7342 | - | 1 | 2026-05-22 |
| AYN7176 | - | 1 | 2026-06-22 |
Recent flights last 50
| Date | Flight | Route | Takeoff | Landing | Duration |
|---|---|---|---|---|---|
| 2026-07-06 | AYN7818 | - | Jul 6, 09:20 UTC | Jul 6, 11:10 UTC | 1h 50m |
| 2026-07-06 | AYN7817 | - | Jul 6, 05:40 UTC | Jul 6, 08:05 UTC | 2h 25m |
| 2026-07-02 | AYN7476 | - | Jul 2, 10:35 UTC | Jul 2, 12:25 UTC | 1h 50m |
| 2026-07-02 | AYN7475 | - | Jul 2, 06:55 UTC | Jul 2, 09:25 UTC | 2h 30m |
| 2026-07-01 | AYN7475 | - | Jul 1, 10:50 UTC | Jul 2, 09:25 UTC | 22h 35m |
| 2026-07-01 | AYN7820 | - | Jul 1, 09:20 UTC | Jul 2, 08:20 UTC | 23h 0m |
| 2026-07-01 | AYN7819 | - | Jul 1, 05:35 UTC | Jul 1, 08:00 UTC | 2h 25m |
| 2026-06-27 | AYN7112 | - | Jun 27, 12:09 UTC | Jun 27, 13:55 UTC | 1h 45m |
| 2026-06-27 | AYN7111 | - | Jun 27, 10:25 UTC | Jun 27, 10:50 UTC | 25m |
| 2026-06-27 | AYN7111 | - | Jun 27, 08:20 UTC | Jun 27, 09:44 UTC | 1h 25m |
| 2026-06-22 | AYN7176 | - | Jun 22, 19:24 UTC | Jun 22, 19:34 UTC | 10m |
| 2026-06-22 | AYN7078 | - | Jun 22, 10:00 UTC | Jun 22, 10:40 UTC | 40m |
| 2026-06-22 | AYN7077 | - | Jun 22, 08:15 UTC | Jun 22, 09:04 UTC | 50m |
| 2026-06-21 | AYN7174 | - | Jun 21, 08:15 UTC | Jun 21, 08:40 UTC | 25m |
| 2026-06-21 | AYN7173 | - | Jun 21, 06:55 UTC | Jun 21, 07:14 UTC | 20m |
| 2026-06-17 | AYN7112 | - | Jun 17, 12:05 UTC | Jun 17, 13:45 UTC | 1h 40m |
| 2026-06-17 | AYN7111 | - | Jun 17, 10:10 UTC | Jun 17, 10:25 UTC | 15m |
| 2026-06-17 | AYN7111 | - | Jun 17, 08:10 UTC | Jun 17, 09:35 UTC | 1h 25m |
| 2026-06-16 | AYN7111 | - | Jun 16, 08:49 UTC | Jun 17, 08:45 UTC | 23h 56m |
| 2026-06-16 | AYN7152 | - | Jun 16, 08:35 UTC | Jun 16, 09:00 UTC | 25m |
| 2026-06-16 | AYN7151 | - | Jun 16, 07:25 UTC | Jun 16, 07:50 UTC | 25m |
| 2026-06-13 | AYN7112 | - | Jun 13, 12:00 UTC | Jun 13, 13:45 UTC | 1h 45m |
| 2026-06-13 | AYN7111 | - | Jun 13, 08:20 UTC | Jun 13, 10:30 UTC | 2h 10m |
| 2026-06-08 | AYN7818 | - | Jun 8, 09:20 UTC | Jun 8, 12:10 UTC | 2h 50m |
| 2026-06-07 | AYN7817 | - | Jun 7, 13:50 UTC | Jun 8, 08:00 UTC | 18h 10m |
| 2026-06-07 | AYN7676 | - | Jun 7, 09:15 UTC | Jun 7, 11:20 UTC | 2h 5m |
| 2026-06-06 | AYN7476 | - | Jun 6, 12:49 UTC | Jun 7, 07:55 UTC | 19h 5m |
| 2026-06-06 | AYN7476 | - | Jun 6, 12:20 UTC | Jun 7, 07:55 UTC | 19h 35m |
| 2026-06-06 | AYN7476 | - | Jun 6, 08:50 UTC | Jun 7, 07:55 UTC | 23h 5m |
| 2026-06-06 | AYN7475 | - | Jun 6, 07:40 UTC | Jun 6, 13:30 UTC | 5h 50m |
| 2026-06-04 | AYN7476 | - | Jun 4, 10:35 UTC | Jun 4, 12:40 UTC | 2h 5m |
| 2026-06-03 | AYN7475 | - | Jun 3, 16:25 UTC | Jun 4, 09:20 UTC | 16h 55m |
| 2026-06-03 | AYN7475 | - | Jun 3, 12:50 UTC | Jun 4, 09:20 UTC | 20h 30m |
| 2026-06-03 | AYN7820 | - | Jun 3, 10:50 UTC | Jun 4, 09:20 UTC | 22h 30m |
| 2026-06-03 | AYN7819 | - | Jun 3, 07:30 UTC | Jun 3, 09:35 UTC | 2h 5m |
| 2026-06-02 | AYN7819 | - | Jun 2, 13:40 UTC | Jun 3, 09:35 UTC | 19h 55m |
| 2026-06-02 | AYN7993 | - | Jun 2, 12:35 UTC | Jun 2, 12:55 UTC | 20m |
| 2026-06-01 | AYN7818 | - | Jun 1, 09:30 UTC | Jun 1, 11:30 UTC | 2h 0m |
| 2026-06-01 | AYN7817 | - | Jun 1, 06:05 UTC | Jun 1, 08:20 UTC | 2h 15m |
| 2026-05-30 | AYN7112 | - | May 30, 12:00 UTC | May 30, 13:45 UTC | 1h 45m |
| 2026-05-30 | AYN7111 | - | May 30, 08:20 UTC | May 30, 10:30 UTC | 2h 10m |
| 2026-05-28 | AYN7078 | - | May 28, 06:45 UTC | May 28, 07:25 UTC | 40m |
| 2026-05-28 | AYN7077 | - | May 28, 05:25 UTC | May 28, 05:40 UTC | 15m |
| 2026-05-27 | AYN7606 | - | May 27, 09:35 UTC | May 27, 10:15 UTC | 40m |
| 2026-05-27 | AYN7605 | - | May 27, 08:20 UTC | May 27, 08:35 UTC | 15m |
| 2026-05-25 | AYN7952 | - | May 25, 08:45 UTC | May 25, 10:40 UTC | 1h 55m |
| 2026-05-25 | AYN7951 | - | May 25, 07:25 UTC | May 25, 07:40 UTC | 15m |
| 2026-05-25 | AYN7951 | - | May 25, 05:30 UTC | May 25, 06:50 UTC | 1h 20m |
| 2026-05-23 | AYN7906 | - | May 23, 10:00 UTC | May 23, 10:40 UTC | 40m |
| 2026-05-23 | AYN7905 | - | May 23, 06:30 UTC | May 23, 06:50 UTC | 20m |
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-KFI page for operator, model, and routing details .