sensors Mode-S transponder
4D0104
ICAO 24-bit transponder address · allocated to Luxembourg
Currently assigned to LX-VCD · BOEING 747-8
- Hex
- 4D0104
- Octal
- 23200404
- Decimal
- 5,046,532
- Country
- LU
- Tail
- LX-VCD
- Type
- B748
- Flights observed
- 240
- Distinct callsigns
- 20
- Country
- LU
- Last broadcast
- Jul 26, 12:05 UTC
Last known position
Country allocation
The ICAO 24-bit address 4D0104 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 |
|---|---|---|---|
| CLX287 | Cargolux | 13 | 2026-06-19 |
| CLX9521 | Cargolux | 8 | 2026-07-21 |
| CLX9005 | Cargolux | 7 | 2026-07-17 |
| CLX278 | Cargolux | 7 | 2026-06-23 |
| CLX9016 | - | 6 | 2026-07-19 |
| CLX7623 | Cargolux | 6 | 2026-07-23 |
| CLX9425 | - | 5 | 2026-06-26 |
| CLX7355 | Cargolux | 5 | 2026-06-13 |
| CLX4793 | Cargolux | 5 | 2026-06-18 |
| CLX37 | - | 5 | 2026-05-28 |
| CLX226 | Cargolux | 5 | 2026-05-25 |
| CLX976 | Cargolux | 4 | 2026-07-23 |
| CLX9015 | Cargolux | 4 | 2026-07-17 |
| CLX7337 | - | 4 | 2026-06-29 |
| CLX7216 | - | 4 | 2026-07-04 |
| CLX597 | - | 4 | 2026-06-14 |
| CLX519 | - | 4 | 2026-07-22 |
| CLX46C | Cargolux | 4 | 2026-04-16 |
| CLX4327 | - | 4 | 2026-06-22 |
| CLX39 | - | 4 | 2026-05-28 |
Recent flights last 50
| Date | Flight | Route | Takeoff | Landing | Duration |
|---|---|---|---|---|---|
| 2026-07-26 | CLX9727 | LUX → CGO | Jul 26, 08:20 UTC | Jul 26, 12:05 UTC | 3h 45m |
| 2026-07-25 | CLX73M | IAH → LUX | Jul 25, 19:30 UTC | Jul 26, 04:25 UTC | 8h 55m |
| 2026-07-25 | CLX5166 | GDL → LUX | Jul 25, 11:30 UTC | Jul 25, 17:15 UTC | 5h 45m |
| 2026-07-25 | CLX5165 | MEX → GDL | Jul 25, 01:45 UTC | Jul 25, 07:55 UTC | 6h 10m |
| 2026-07-24 | CLX293 | HKG → ANC | Jul 24, 14:00 UTC | Jul 24, 23:15 UTC | 9h 15m |
| 2026-07-24 | CLX4164 | LUX → HKG | Jul 24, 08:30 UTC | Jul 24, 09:05 UTC | 35m |
| 2026-07-23 | CLX4164 | LUX → HKG | Jul 23, 22:00 UTC | Jul 24, 01:45 UTC | 3h 45m |
| 2026-07-23 | CLX976 | GYD → LUX | Jul 23, 14:20 UTC | Jul 23, 18:45 UTC | 4h 25m |
| 2026-07-23 | CLX976 | GYD → LUX | Jul 23, 04:15 UTC | Jul 23, 04:30 UTC | 15m |
| 2026-07-23 | CLX7623 | HAN → HKG | Jul 23, 01:45 UTC | Jul 23, 02:10 UTC | 25m |
| 2026-07-23 | CLX7623 | HAN → HKG | Jul 23, 00:50 UTC | Jul 23, 01:00 UTC | 10m |
| 2026-07-22 | CLX7623 | HAN → HKG | Jul 22, 11:35 UTC | Jul 22, 21:40 UTC | 10h 5m |
| 2026-07-22 | CLX519 | - | Jul 22, 04:00 UTC | Jul 22, 05:10 UTC | 1h 10m |
| 2026-07-21 | CLX519 | - | Jul 21, 18:30 UTC | Jul 21, 18:45 UTC | 15m |
| 2026-07-21 | CLX9521 | KUL → HKG | Jul 21, 15:05 UTC | Jul 21, 15:30 UTC | 25m |
| 2026-07-21 | CLX9521 | KUL → HKG | Jul 21, 12:05 UTC | Jul 21, 12:35 UTC | 30m |
| 2026-07-21 | CLX9521 | KUL → HKG | Jul 21, 09:00 UTC | Jul 21, 09:20 UTC | 20m |
| 2026-07-20 | CLX9521 | KUL → HKG | Jul 20, 21:40 UTC | Jul 21, 08:10 UTC | 10h 29m |
| 2026-07-19 | CLX9016 | - | Jul 19, 15:20 UTC | Jul 20, 04:15 UTC | 12h 55m |
| 2026-07-19 | CLX9016 | - | Jul 19, 11:40 UTC | Jul 19, 11:55 UTC | 15m |
| 2026-07-19 | CLX9016 | - | Jul 19, 08:55 UTC | Jul 19, 09:45 UTC | 50m |
| 2026-07-18 | CLX9006 | - | Jul 18, 15:25 UTC | Jul 19, 05:55 UTC | 14h 30m |
| 2026-07-17 | CLX9015 | TPE → GYD | Jul 17, 20:29 UTC | Jul 18, 12:10 UTC | 15h 41m |
| 2026-07-17 | CLX9005 | ICN → TPE | Jul 17, 06:40 UTC | Jul 17, 17:20 UTC | 10h 40m |
| 2026-07-16 | CLX976 | - | Jul 16, 15:40 UTC | Jul 16, 20:05 UTC | 4h 25m |
| 2026-07-16 | CLX976 | - | Jul 16, 04:30 UTC | Jul 16, 04:45 UTC | 15m |
| 2026-07-16 | CLX7623 | - | Jul 16, 00:35 UTC | Jul 16, 01:05 UTC | 30m |
| 2026-07-15 | CLX7623 | - | Jul 15, 23:40 UTC | Jul 15, 23:50 UTC | 10m |
| 2026-07-15 | CLX7623 | - | Jul 15, 10:10 UTC | Jul 15, 20:15 UTC | 10h 5m |
| 2026-07-14 | CLX12V | - | Jul 14, 21:00 UTC | Jul 15, 04:35 UTC | 7h 34m |
| 2026-07-14 | CLX12V | ANC → ORD | Jul 14, 12:30 UTC | Jul 14, 17:50 UTC | 5h 20m |
| 2026-07-13 | CLX5482 | - | Jul 13, 15:45 UTC | Jul 14, 10:40 UTC | 18h 55m |
| 2026-07-13 | CLX5482 | - | Jul 13, 13:05 UTC | Jul 14, 10:40 UTC | 21h 35m |
| 2026-07-13 | CLX5482 | - | Jul 13, 12:30 UTC | Jul 14, 10:40 UTC | 22h 10m |
| 2026-07-13 | CLX942 | - | Jul 13, 03:40 UTC | Jul 13, 08:05 UTC | 4h 25m |
| 2026-07-12 | CLX942 | - | Jul 12, 14:35 UTC | Jul 12, 14:50 UTC | 15m |
| 2026-07-12 | CLX7417 | - | Jul 12, 09:30 UTC | Jul 12, 09:50 UTC | 20m |
| 2026-07-12 | CLX7417 | - | Jul 12, 06:20 UTC | Jul 12, 06:55 UTC | 35m |
| 2026-07-11 | CLX7306 | - | Jul 11, 15:40 UTC | Jul 12, 03:35 UTC | 11h 55m |
| 2026-07-10 | CLX9015 | ICN → LUX | Jul 10, 18:55 UTC | Jul 11, 09:45 UTC | 14h 51m |
| 2026-07-10 | CLX9005 | - | Jul 10, 15:35 UTC | Jul 10, 15:55 UTC | 20m |
| 2026-07-10 | CLX9005 | - | Jul 10, 05:25 UTC | Jul 10, 14:55 UTC | 9h 30m |
| 2026-07-09 | CLX63A | SEA → LUX | Jul 9, 10:25 UTC | Jul 9, 19:35 UTC | 9h 10m |
| 2026-07-09 | CLX3 | - | Jul 9, 04:25 UTC | Jul 9, 06:40 UTC | 2h 15m |
| 2026-07-08 | CLX3 | - | Jul 8, 14:30 UTC | Jul 9, 01:30 UTC | 11h 0m |
| 2026-07-05 | CLX86 | - | Jul 5, 06:40 UTC | Jul 5, 19:40 UTC | 13h 0m |
| 2026-07-04 | CLX7216 | - | Jul 4, 16:30 UTC | Jul 4, 16:50 UTC | 20m |
| 2026-07-04 | CLX7216 | - | Jul 4, 07:05 UTC | Jul 4, 10:50 UTC | 3h 45m |
| 2026-07-03 | CLX7955 | HKG → HKG | Jul 3, 16:40 UTC | Jul 4, 04:10 UTC | 11h 30m |
| 2026-07-03 | CLX7955 | HKG → HKG | Jul 3, 11:50 UTC | Jul 3, 12:05 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-VCD page for operator, model, and routing details .