sensors Mode-S transponder
4CAF0D
ICAO 24-bit transponder address · allocated to Ireland
Currently assigned to EI-HUN · EMBRAER ERJ-190-400
- Hex
- 4CAF0D
- Octal
- 23127415
- Decimal
- 5,025,549
- Country
- IE
- Tail
- EI-HUN
- Type
- E295
- Flights observed
- 24
- Distinct callsigns
- 8
- Country
- IE
- Last broadcast
- 2h ago
Last known position
Country allocation
The ICAO 24-bit address 4CAF0D 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 8 distinct
Recent flights last 24
| Date | Flight | Route | Takeoff | Landing | Duration |
|---|---|---|---|---|---|
| 2026-06-09 | MML812 | - | Jun 9, 20:50 UTC | Jun 9, 21:00 UTC | 10m |
| 2026-06-08 | MML802 | PKX → UBN | Jun 8, 13:35 UTC | Jun 8, 14:00 UTC | 25m |
| 2026-06-08 | MML801 | UBN → PKX | Jun 8, 11:20 UTC | Jun 8, 11:35 UTC | 15m |
| 2026-06-06 | MML818 | - | Jun 6, 21:00 UTC | Jun 6, 21:09 UTC | 10m |
| 2026-06-06 | MML817 | - | Jun 6, 17:54 UTC | Jun 6, 18:04 UTC | 10m |
| 2026-06-02 | MML812 | - | Jun 2, 21:05 UTC | Jun 2, 21:15 UTC | 10m |
| 2026-05-26 | MML812 | - | May 26, 20:50 UTC | May 26, 21:04 UTC | 15m |
| 2026-05-25 | MML802 | PKX → UBN | May 25, 13:35 UTC | May 25, 14:00 UTC | 25m |
| 2026-05-25 | MML801 | UBN → PKX | May 25, 11:20 UTC | May 25, 11:35 UTC | 15m |
| 2026-05-23 | MML818 | - | May 23, 21:05 UTC | May 23, 21:20 UTC | 15m |
| 2026-05-12 | MML812 | - | May 12, 20:50 UTC | May 12, 21:10 UTC | 20m |
| 2026-05-09 | MML802 | PKX → UBN | May 9, 13:30 UTC | May 9, 13:40 UTC | 10m |
| 2026-05-09 | MML801 | UBN → PKX | May 9, 11:15 UTC | May 9, 11:25 UTC | 10m |
| 2026-05-05 | MML812 | - | May 5, 20:55 UTC | May 5, 21:05 UTC | 10m |
| 2026-05-03 | MML802 | PKX → UBN | May 3, 13:20 UTC | May 3, 13:35 UTC | 15m |
| 2026-05-03 | MML801 | UBN → PKX | May 3, 11:10 UTC | May 3, 11:25 UTC | 15m |
| 2026-04-28 | MML812 | - | Apr 28, 20:55 UTC | Apr 28, 21:10 UTC | 15m |
| 2026-04-27 | MML12 | - | Apr 27, 07:20 UTC | Apr 27, 08:00 UTC | 40m |
| 2026-04-26 | MML11 | - | Apr 26, 09:40 UTC | Apr 26, 10:25 UTC | 45m |
| 2026-04-25 | MML12 | - | Apr 25, 07:30 UTC | Apr 25, 08:10 UTC | 40m |
| 2026-04-24 | MML11 | - | Apr 24, 10:10 UTC | Apr 24, 11:15 UTC | 1h 5m |
| 2026-04-21 | MML12 | - | Apr 21, 08:00 UTC | Apr 21, 21:45 UTC | 13h 45m |
| 2026-04-20 | MML11 | - | Apr 20, 10:05 UTC | Apr 20, 11:05 UTC | 1h 0m |
| 2026-04-16 | MML12D | - | Apr 16, 15:50 UTC | Apr 16, 16:35 UTC | 45m |
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-HUN page for operator, model, and routing details .