sensors Mode-S transponder
4D0128
ICAO 24-bit transponder address · allocated to Luxembourg
Currently assigned to LX-SCV · BOEING 747-400
- Hex
- 4D0128
- Octal
- 23200450
- Decimal
- 5,046,568
- Country
- LU
- Tail
- LX-SCV
- Type
- B744
- Flights observed
- 93
- Distinct callsigns
- 20
- Country
- LU
- Last broadcast
- 3h ago
Last known position
Country allocation
The ICAO 24-bit address 4D0128 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 |
|---|---|---|---|
| CLX8 | - | 12 | 2026-05-29 |
| CLX65 | - | 7 | 2026-05-28 |
| CLX7603 | Cargolux | 5 | 2026-05-27 |
| CLX9935 | Cargolux | 4 | 2026-05-16 |
| CLX9872 | Cargolux | 4 | 2026-04-15 |
| CLX41U | Cargolux | 4 | 2026-04-18 |
| CLX32 | - | 4 | 2026-04-16 |
| CLX309 | - | 4 | 2026-05-16 |
| CLX3 | - | 4 | 2026-05-21 |
| CLX9726 | Cargolux | 3 | 2026-05-30 |
| CLX92 | - | 3 | 2026-04-27 |
| CLX9 | - | 3 | 2026-04-28 |
| CLX75V | Cargolux | 3 | 2026-05-29 |
| CLX56 | - | 3 | 2026-05-31 |
| CLX515 | - | 3 | 2026-05-13 |
| CLX12G | - | 3 | 2026-04-17 |
| CLX9932 | Cargolux | 2 | 2026-05-12 |
| CLX9727 | Cargolux | 2 | 2026-04-26 |
| CLX7 | - | 2 | 2026-05-31 |
| CLX69B | Cargolux | 2 | 2026-06-01 |
Recent flights last 50
| Date | Flight | Route | Takeoff | Landing | Duration |
|---|---|---|---|---|---|
| 2026-06-02 | CLX46C | LCK → LUX | Jun 2, 07:50 UTC | Jun 2, 17:05 UTC | 9h 15m |
| 2026-06-02 | CLX46C | LCK → LUX | Jun 2, 04:00 UTC | Jun 2, 05:20 UTC | 1h 20m |
| 2026-06-01 | CLX1 | - | Jun 1, 16:55 UTC | Jun 2, 01:45 UTC | 8h 50m |
| 2026-06-01 | CLX69B | ORD → LUX | Jun 1, 03:45 UTC | Jun 1, 11:20 UTC | 7h 35m |
| 2026-05-31 | CLX7 | - | May 31, 16:20 UTC | Jun 1, 00:35 UTC | 8h 15m |
| 2026-05-31 | CLX56 | - | May 31, 08:55 UTC | May 31, 10:15 UTC | 1h 20m |
| 2026-05-30 | CLX9726 | LUX → CGO | May 30, 04:10 UTC | May 30, 08:00 UTC | 3h 50m |
| 2026-05-29 | CLX75V | SJU → LUX | May 29, 09:00 UTC | May 29, 17:05 UTC | 8h 5m |
| 2026-05-29 | CLX8 | - | May 29, 04:45 UTC | May 29, 06:15 UTC | 1h 30m |
| 2026-05-29 | CLX8 | - | May 29, 03:10 UTC | May 29, 03:20 UTC | 10m |
| 2026-05-29 | CLX8 | - | May 29, 00:35 UTC | May 29, 01:00 UTC | 25m |
| 2026-05-28 | CLX8 | - | May 28, 15:55 UTC | May 28, 17:40 UTC | 1h 45m |
| 2026-05-28 | CLX65 | - | May 28, 06:30 UTC | May 28, 11:05 UTC | 4h 35m |
| 2026-05-27 | CLX65 | - | May 27, 10:45 UTC | May 28, 10:00 UTC | 23h 15m |
| 2026-05-27 | CLX65 | - | May 27, 08:05 UTC | May 28, 08:00 UTC | 23h 55m |
| 2026-05-27 | CLX7603 | LUX → CGO | May 27, 06:49 UTC | May 27, 10:50 UTC | 4h 1m |
| 2026-05-25 | CLX57R | IAH → PIK | May 25, 11:20 UTC | May 25, 12:50 UTC | 1h 30m |
| 2026-05-25 | CLX57R | IAH → PIK | May 25, 01:55 UTC | May 25, 09:10 UTC | 7h 15m |
| 2026-05-24 | CLX8 | - | May 24, 11:55 UTC | May 24, 21:45 UTC | 9h 50m |
| 2026-05-24 | CLX56 | - | May 24, 03:30 UTC | May 24, 07:40 UTC | 4h 10m |
| 2026-05-23 | CLX56 | - | May 23, 08:05 UTC | May 24, 07:40 UTC | 23h 36m |
| 2026-05-23 | CLX9726 | LUX → CGO | May 23, 06:05 UTC | May 24, 06:00 UTC | 23h 56m |
| 2026-05-23 | CLX9726 | LUX → CGO | May 23, 04:40 UTC | May 24, 04:00 UTC | 23h 21m |
| 2026-05-21 | CLX63A | SEA → LUX | May 21, 07:15 UTC | May 21, 16:40 UTC | 9h 25m |
| 2026-05-21 | CLX3 | - | May 21, 01:40 UTC | May 21, 03:55 UTC | 2h 15m |
| 2026-05-20 | CLX3 | - | May 20, 11:45 UTC | May 20, 22:55 UTC | 11h 10m |
| 2026-05-16 | CLX309 | - | May 16, 23:55 UTC | May 17, 04:10 UTC | 4h 15m |
| 2026-05-16 | CLX309 | - | May 16, 11:11 UTC | May 16, 11:25 UTC | 15m |
| 2026-05-16 | CLX9935 | DMM → HKG | May 16, 07:55 UTC | May 16, 08:16 UTC | 20m |
| 2026-05-15 | CLX9935 | DMM → HKG | May 15, 20:50 UTC | May 16, 00:55 UTC | 4h 5m |
| 2026-05-15 | CLX96Z | IAH → LUX | May 15, 02:45 UTC | May 15, 11:40 UTC | 8h 55m |
| 2026-05-14 | CLX5 | - | May 14, 21:45 UTC | May 14, 23:40 UTC | 1h 55m |
| 2026-05-14 | CLX5 | - | May 14, 11:01 UTC | May 14, 19:15 UTC | 8h 15m |
| 2026-05-13 | CLX515 | BUD → LUX | May 13, 19:00 UTC | May 13, 20:35 UTC | 1h 35m |
| 2026-05-13 | CLX515 | - | May 13, 13:31 UTC | May 13, 14:51 UTC | 1h 20m |
| 2026-05-13 | CLX515 | - | May 13, 03:25 UTC | May 13, 03:40 UTC | 15m |
| 2026-05-12 | CLX9932 | DWC → LUX | May 12, 23:45 UTC | May 13, 00:20 UTC | 35m |
| 2026-05-12 | CLX9932 | DWC → LUX | May 12, 12:55 UTC | May 12, 16:45 UTC | 3h 50m |
| 2026-05-11 | CLX69B | ORD → LUX | May 11, 04:50 UTC | May 11, 12:10 UTC | 7h 20m |
| 2026-05-10 | CLX7 | - | May 10, 17:05 UTC | May 11, 01:34 UTC | 8h 30m |
| 2026-05-10 | CLX87C | ATL → LUX | May 10, 01:55 UTC | May 10, 10:00 UTC | 8h 5m |
| 2026-05-09 | CLX4 | - | May 9, 21:30 UTC | May 9, 23:00 UTC | 1h 30m |
| 2026-05-09 | CLX4 | - | May 9, 09:40 UTC | May 9, 18:10 UTC | 8h 30m |
| 2026-05-02 | CLX309 | - | May 2, 23:45 UTC | May 3, 04:05 UTC | 4h 19m |
| 2026-05-02 | CLX309 | - | May 2, 11:30 UTC | May 2, 11:45 UTC | 15m |
| 2026-05-02 | CLX9935 | DMM → HKG | May 2, 08:15 UTC | May 2, 08:40 UTC | 25m |
| 2026-05-01 | CLX9935 | DMM → HKG | May 1, 21:00 UTC | May 2, 01:05 UTC | 4h 5m |
| 2026-05-01 | CLX75V | SJU → LUX | May 1, 09:50 UTC | May 1, 17:55 UTC | 8h 5m |
| 2026-05-01 | CLX8 | - | May 1, 05:40 UTC | May 1, 07:05 UTC | 1h 25m |
| 2026-05-01 | CLX8 | - | May 1, 03:45 UTC | May 1, 04:00 UTC | 15m |
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-SCV page for operator, model, and routing details .