sensors Mode-S transponder
4D012E
ICAO 24-bit transponder address · allocated to Luxembourg
Currently assigned to LX-LCL · BOEING 747-400
- Hex
- 4D012E
- Octal
- 23200456
- Decimal
- 5,046,574
- Country
- LU
- Tail
- LX-LCL
- Type
- B744
- Flights observed
- 211
- Distinct callsigns
- 20
- Country
- LU
- Last broadcast
- Jul 26, 18:30 UTC
Last known position
Country allocation
The ICAO 24-bit address 4D012E falls within the block assigned to Luxembourg (LU) by ICAO Annex 10, Volume III. Every aircraft registered in Luxembourg 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 |
|---|---|---|---|
| CLX6822 | - | 13 | 2026-07-15 |
| CLX86N | - | 11 | 2026-07-16 |
| CLX56 | - | 10 | 2026-06-28 |
| CLX32 | - | 10 | 2026-07-25 |
| CLX17 | - | 10 | 2026-07-25 |
| CLX43 | - | 9 | 2026-07-23 |
| CLX6823 | - | 7 | 2026-07-15 |
| CLX6232 | Cargolux | 7 | 2026-06-16 |
| CLX6221 | Cargolux | 7 | 2026-06-15 |
| CLX79 | - | 6 | 2026-07-11 |
| CLX48 | - | 6 | 2026-06-07 |
| CLX6 | - | 5 | 2026-07-12 |
| CLX9726 | - | 4 | 2026-06-27 |
| CLX91W | Cargolux | 4 | 2026-06-02 |
| CLX7334 | Cargolux | 4 | 2026-06-20 |
| CLX9872 | Cargolux | 3 | 2026-05-20 |
| CLX9725 | - | 3 | 2026-07-10 |
| CLX93D | - | 3 | 2026-07-19 |
| CLX92 | - | 3 | 2026-06-22 |
| CLX7623 | Cargolux | 3 | 2026-06-04 |
Recent flights last 50
| Date | Flight | Route | Takeoff | Landing | Duration |
|---|---|---|---|---|---|
| 2026-07-25 | CLX32 | - | Jul 25, 21:35 UTC | Jul 26, 18:30 UTC | 20h 56m |
| 2026-07-25 | CLX32 | - | Jul 25, 21:05 UTC | Jul 26, 18:30 UTC | 21h 26m |
| 2026-07-25 | CLX17 | - | Jul 25, 05:30 UTC | Jul 25, 18:45 UTC | 13h 15m |
| 2026-07-24 | CLX17 | - | Jul 24, 22:00 UTC | Jul 25, 18:45 UTC | 20h 45m |
| 2026-07-23 | CLX43 | - | Jul 23, 20:50 UTC | Jul 23, 23:15 UTC | 2h 25m |
| 2026-07-23 | CLX42 | - | Jul 23, 05:15 UTC | Jul 23, 09:50 UTC | 4h 35m |
| 2026-07-22 | CLX42 | - | Jul 22, 10:20 UTC | Jul 23, 09:30 UTC | 23h 10m |
| 2026-07-19 | CLX93D | - | Jul 19, 10:50 UTC | Jul 19, 18:35 UTC | 7h 45m |
| 2026-07-19 | CLX6696 | - | Jul 19, 03:05 UTC | Jul 19, 06:25 UTC | 3h 20m |
| 2026-07-18 | CLX6686 | - | Jul 18, 13:20 UTC | Jul 19, 00:15 UTC | 10h 55m |
| 2026-07-17 | CLX17 | - | Jul 17, 18:25 UTC | Jul 18, 07:35 UTC | 13h 11m |
| 2026-07-17 | CLX17 | - | Jul 17, 11:00 UTC | Jul 18, 07:35 UTC | 20h 36m |
| 2026-07-16 | CLX43 | - | Jul 16, 23:35 UTC | Jul 17, 18:50 UTC | 19h 15m |
| 2026-07-16 | CLX43 | - | Jul 16, 21:45 UTC | Jul 17, 18:50 UTC | 21h 5m |
| 2026-07-16 | CLX86N | AMS → LUX | Jul 16, 13:45 UTC | Jul 16, 14:25 UTC | 40m |
| 2026-07-16 | CLX86N | - | Jul 16, 03:05 UTC | Jul 16, 11:10 UTC | 8h 5m |
| 2026-07-15 | CLX6823 | - | Jul 15, 14:00 UTC | Jul 16, 00:20 UTC | 10h 20m |
| 2026-07-15 | CLX6822 | - | Jul 15, 10:15 UTC | Jul 15, 10:50 UTC | 35m |
| 2026-07-14 | CLX6822 | - | Jul 14, 20:15 UTC | Jul 15, 07:35 UTC | 11h 19m |
| 2026-07-13 | CLX72W | - | Jul 13, 14:30 UTC | Jul 13, 15:25 UTC | 55m |
| 2026-07-13 | CLX72W | ATL → STN | Jul 13, 04:55 UTC | Jul 13, 12:50 UTC | 7h 55m |
| 2026-07-12 | CLX6 | - | Jul 12, 15:45 UTC | Jul 13, 00:25 UTC | 8h 40m |
| 2026-07-12 | CLX98V | DFW → LUX | Jul 12, 03:55 UTC | Jul 12, 13:01 UTC | 9h 5m |
| 2026-07-11 | CLX78Y | ORD → DFW | Jul 11, 23:20 UTC | Jul 12, 01:05 UTC | 1h 45m |
| 2026-07-11 | CLX78Y | - | Jul 11, 12:05 UTC | Jul 11, 20:25 UTC | 8h 20m |
| 2026-07-11 | CLX79 | - | Jul 11, 03:50 UTC | Jul 11, 08:25 UTC | 4h 35m |
| 2026-07-10 | CLX79 | - | Jul 10, 07:35 UTC | Jul 11, 07:30 UTC | 23h 55m |
| 2026-07-10 | CLX9725 | - | Jul 10, 05:35 UTC | Jul 11, 05:15 UTC | 23h 40m |
| 2026-07-09 | CLX34P | ATL → LUX | Jul 9, 12:35 UTC | Jul 9, 20:35 UTC | 8h 0m |
| 2026-07-09 | CLX6 | MIA → ATL | Jul 9, 07:30 UTC | Jul 9, 08:55 UTC | 1h 25m |
| 2026-07-08 | CLX6 | - | Jul 8, 20:50 UTC | Jul 9, 06:00 UTC | 9h 10m |
| 2026-07-08 | CLX6083 | - | Jul 8, 07:55 UTC | Jul 8, 18:15 UTC | 10h 20m |
| 2026-07-07 | CLX6082 | - | Jul 7, 23:35 UTC | Jul 8, 05:15 UTC | 5h 40m |
| 2026-07-07 | CLX44D | - | Jul 7, 09:50 UTC | Jul 7, 21:10 UTC | 11h 20m |
| 2026-07-03 | CLX17 | - | Jul 3, 20:55 UTC | Jul 4, 10:40 UTC | 13h 45m |
| 2026-07-03 | CLX17 | - | Jul 3, 13:45 UTC | Jul 4, 10:40 UTC | 20h 55m |
| 2026-07-02 | CLX43 | - | Jul 2, 23:35 UTC | Jul 3, 21:20 UTC | 21h 45m |
| 2026-07-02 | CLX43 | - | Jul 2, 21:35 UTC | Jul 3, 21:20 UTC | 23h 45m |
| 2026-07-02 | CLX43 | - | Jul 2, 21:15 UTC | Jul 3, 14:15 UTC | 17h 0m |
| 2026-07-02 | CLX63A | SEA → LUX | Jul 2, 06:30 UTC | Jul 2, 15:25 UTC | 8h 55m |
| 2026-07-02 | CLX3 | - | Jul 2, 01:45 UTC | Jul 2, 03:55 UTC | 2h 10m |
| 2026-07-01 | CLX3 | - | Jul 1, 11:30 UTC | Jul 1, 22:30 UTC | 11h 0m |
| 2026-06-29 | CLX6697 | - | Jun 29, 01:29 UTC | Jun 29, 14:54 UTC | 13h 25m |
| 2026-06-28 | CLX6687 | - | Jun 28, 11:14 UTC | Jun 28, 22:10 UTC | 10h 55m |
| 2026-06-28 | CLX56 | - | Jun 28, 04:05 UTC | Jun 28, 08:14 UTC | 4h 10m |
| 2026-06-27 | CLX56 | - | Jun 27, 09:34 UTC | Jun 28, 08:14 UTC | 22h 40m |
| 2026-06-27 | CLX56 | - | Jun 27, 07:34 UTC | Jun 28, 07:29 UTC | 23h 55m |
| 2026-06-27 | CLX9726 | - | Jun 27, 05:59 UTC | Jun 28, 05:24 UTC | 23h 25m |
| 2026-06-26 | CLX23K | IAH → LUX | Jun 26, 13:34 UTC | Jun 26, 21:59 UTC | 8h 25m |
| 2026-06-26 | CLX6694 | - | Jun 26, 06:39 UTC | Jun 26, 11:05 UTC | 4h 25m |
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 LX-LCL page for operator, model, and routing details .