sensors Mode-S transponder
4D012C
ICAO 24-bit transponder address · allocated to Luxembourg
Currently assigned to LX-ICL · BOEING 747-400
- Hex
- 4D012C
- Octal
- 23200454
- Decimal
- 5,046,572
- Country
- LU
- Tail
- LX-ICL
- Type
- B744
- Flights observed
- 89
- Distinct callsigns
- 20
- Country
- LU
- Last broadcast
- 2h ago
Last known position
Country allocation
The ICAO 24-bit address 4D012C 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 |
|---|---|---|---|
| CLX1 | - | 12 | 2026-05-22 |
| CLX95U | Cargolux | 7 | 2026-05-23 |
| CLX6 | - | 7 | 2026-05-17 |
| CLX2 | - | 6 | 2026-04-23 |
| CLX74T | Cargolux | 5 | 2026-04-23 |
| CLX72W | Cargolux | 5 | 2026-05-18 |
| CLX17D | - | 5 | 2026-04-14 |
| CLX35K | - | 4 | 2026-04-15 |
| CLX3 | - | 4 | 2026-05-03 |
| CLX17G | Cargolux | 4 | 2026-05-03 |
| CLX97C | Cargolux | 2 | 2026-04-30 |
| CLX9 | - | 2 | 2026-05-29 |
| CLX87C | Cargolux | 2 | 2026-05-24 |
| CLX7 | - | 2 | 2026-04-30 |
| CLX67 | Cargolux | 2 | 2026-05-28 |
| CLX65B | Cargolux | 2 | 2026-04-27 |
| CLX58X | - | 2 | 2026-04-27 |
| CLX5 | - | 2 | 2026-05-25 |
| CLX4 | - | 2 | 2026-05-23 |
| CLX34P | Cargolux | 2 | 2026-05-14 |
Recent flights last 50
| Date | Flight | Route | Takeoff | Landing | Duration |
|---|---|---|---|---|---|
| 2026-05-30 | CLX14W | LAX → LUX | May 30, 06:50 UTC | May 30, 10:05 UTC | 3h 15m |
| 2026-05-29 | CLX9 | - | May 29, 16:45 UTC | May 30, 03:50 UTC | 11h 5m |
| 2026-05-28 | CLX67 | LAX → MXP | May 28, 08:55 UTC | May 28, 09:50 UTC | 55m |
| 2026-05-27 | CLX67 | LAX → MXP | May 27, 10:15 UTC | May 27, 21:10 UTC | 10h 55m |
| 2026-05-25 | CLX5 | - | May 25, 01:55 UTC | May 25, 02:15 UTC | 20m |
| 2026-05-24 | CLX5 | - | May 24, 15:05 UTC | May 24, 23:46 UTC | 8h 41m |
| 2026-05-24 | CLX87C | ATL → LUX | May 24, 02:35 UTC | May 24, 10:30 UTC | 7h 55m |
| 2026-05-23 | CLX4 | LUX → ATL | May 23, 13:40 UTC | May 23, 22:50 UTC | 9h 11m |
| 2026-05-23 | CLX95U | HSV → LUX | May 23, 02:00 UTC | May 23, 09:25 UTC | 7h 25m |
| 2026-05-22 | CLX1 | - | May 22, 22:05 UTC | May 22, 22:45 UTC | 40m |
| 2026-05-22 | CLX1 | - | May 22, 10:45 UTC | May 22, 19:25 UTC | 8h 40m |
| 2026-05-18 | CLX72W | PIK → LUX | May 18, 04:00 UTC | May 18, 11:55 UTC | 7h 55m |
| 2026-05-17 | CLX6 | - | May 17, 23:15 UTC | May 18, 00:45 UTC | 1h 30m |
| 2026-05-17 | CLX6 | - | May 17, 10:35 UTC | May 17, 20:05 UTC | 9h 30m |
| 2026-05-16 | CLX14W | LAX → LUX | May 16, 06:41 UTC | May 16, 16:40 UTC | 10h 0m |
| 2026-05-15 | CLX9 | - | May 15, 16:20 UTC | May 16, 03:35 UTC | 11h 15m |
| 2026-05-14 | CLX34P | ATL → LUX | May 14, 09:20 UTC | May 14, 17:10 UTC | 7h 50m |
| 2026-05-14 | CLX6 | - | May 14, 04:25 UTC | May 14, 05:55 UTC | 1h 30m |
| 2026-05-13 | CLX6 | - | May 13, 16:30 UTC | May 14, 02:05 UTC | 9h 35m |
| 2026-05-10 | CLX93D | LAX → LUX | May 10, 09:40 UTC | May 10, 17:10 UTC | 7h 30m |
| 2026-05-10 | CLX6696 | DFW → LUX | May 10, 03:35 UTC | May 10, 06:35 UTC | 3h 0m |
| 2026-05-09 | CLX6686 | MEX → DFW | May 9, 13:10 UTC | May 10, 00:39 UTC | 11h 30m |
| 2026-05-09 | CLX95U | HSV → LUX | May 9, 02:00 UTC | May 9, 09:40 UTC | 7h 40m |
| 2026-05-08 | CLX1 | - | May 8, 21:25 UTC | May 8, 22:10 UTC | 45m |
| 2026-05-08 | CLX1 | - | May 8, 10:14 UTC | May 8, 18:55 UTC | 8h 40m |
| 2026-05-07 | CLX34P | ATL → LUX | May 7, 08:35 UTC | May 7, 16:25 UTC | 7h 50m |
| 2026-05-07 | CLX6 | - | May 7, 03:35 UTC | May 7, 05:00 UTC | 1h 25m |
| 2026-05-06 | CLX6 | - | May 6, 16:25 UTC | May 7, 01:45 UTC | 9h 19m |
| 2026-05-03 | CLX17G | SEA → PIK | May 3, 19:05 UTC | May 3, 20:30 UTC | 1h 25m |
| 2026-05-03 | CLX17G | SEA → PIK | May 3, 08:25 UTC | May 3, 16:40 UTC | 8h 15m |
| 2026-05-03 | CLX3 | - | May 3, 02:00 UTC | May 3, 04:00 UTC | 1h 59m |
| 2026-05-02 | CLX3 | - | May 2, 12:15 UTC | May 2, 23:25 UTC | 11h 10m |
| 2026-05-02 | CLX95U | HSV → LUX | May 2, 00:55 UTC | May 2, 08:40 UTC | 7h 45m |
| 2026-05-01 | CLX1 | - | May 1, 20:25 UTC | May 1, 21:05 UTC | 40m |
| 2026-05-01 | CLX1 | - | May 1, 10:00 UTC | May 1, 18:30 UTC | 8h 30m |
| 2026-04-30 | CLX97C | IAH → PIK | Apr 30, 16:15 UTC | Apr 30, 17:45 UTC | 1h 30m |
| 2026-04-30 | CLX97C | IAH → PIK | Apr 30, 05:50 UTC | Apr 30, 13:35 UTC | 7h 45m |
| 2026-04-30 | CLX7 | - | Apr 30, 02:35 UTC | Apr 30, 03:15 UTC | 40m |
| 2026-04-29 | CLX7 | LUX → DFW | Apr 29, 13:15 UTC | Apr 29, 23:45 UTC | 10h 29m |
| 2026-04-28 | CLX14D | IAH → LUX | Apr 28, 22:10 UTC | Apr 29, 07:20 UTC | 9h 10m |
| 2026-04-28 | CLX21C | LUX → IAH | Apr 28, 09:25 UTC | Apr 28, 19:45 UTC | 10h 20m |
| 2026-04-27 | CLX65B | ORD → LUX | Apr 27, 20:00 UTC | Apr 28, 05:15 UTC | 9h 15m |
| 2026-04-27 | CLX58X | - | Apr 27, 04:45 UTC | Apr 27, 15:00 UTC | 10h 15m |
| 2026-04-26 | CLX17G | SEA → PIK | Apr 26, 20:35 UTC | Apr 26, 22:00 UTC | 1h 25m |
| 2026-04-26 | CLX17G | SEA → PIK | Apr 26, 10:20 UTC | Apr 26, 18:40 UTC | 8h 20m |
| 2026-04-26 | CLX3 | - | Apr 26, 05:50 UTC | Apr 26, 07:55 UTC | 2h 5m |
| 2026-04-25 | CLX3 | - | Apr 25, 15:40 UTC | Apr 26, 02:40 UTC | 11h 0m |
| 2026-04-25 | CLX23P | MIA → LUX | Apr 25, 02:40 UTC | Apr 25, 11:00 UTC | 8h 20m |
| 2026-04-24 | CLX34A | - | Apr 24, 16:00 UTC | Apr 25, 00:10 UTC | 8h 10m |
| 2026-04-24 | CLX34A | LUX → EMA | Apr 24, 10:50 UTC | Apr 24, 12:00 UTC | 1h 10m |
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-ICL page for operator, model, and routing details .