Apparatus

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sensors Mode-S transponder

4D0103

ICAO 24-bit transponder address · allocated to Luxembourg

Currently assigned to LX-VCA · BOEING 747-8

Hex
4D0103
Octal
23200403
Decimal
5,046,531
Country
LU
Tail
LX-VCA
Type
B748
No current signal · last broadcast 1d ago
Flights observed
222
Distinct callsigns
20
Country
LU
Last broadcast
1d ago

Last known position

Most recent position reported by Mode-S 4D0103.

Country allocation

The ICAO 24-bit address 4D0103 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
CLX226 Cargolux 10 2026-04-27
CLX83E - 9 2026-07-04
CLX4326 - 7 2026-07-12
CLX7601 Cargolux 6 2026-06-22
CLX52 - 6 2026-06-23
CLX27J - 6 2026-06-25
CLX209 - 6 2026-07-13
CLX9016 Cargolux 5 2026-06-14
CLX64 - 4 2026-06-04
CLX5933 Cargolux 4 2026-04-16
CLX5932 - 4 2026-04-15
CLX5723 - 4 2026-06-24
CLX5485 - 4 2026-07-03
CLX4722 - 4 2026-06-24
CLX4484 Cargolux 4 2026-07-02
CLX261 Cargolux 4 2026-05-28
CLX237 - 4 2026-04-15
CLX9363 - 3 2026-07-08
CLX9362 - 3 2026-07-07
CLX9005 Cargolux 3 2026-06-12

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-13 CLX209 - Jul 13, 01:55 UTCJul 13, 09:40 UTC7h 45m
2026-07-12 CLX209 ANC → ORD Jul 12, 17:45 UTCJul 12, 23:00 UTC5h 15m
2026-07-12 CLX209 HKG → ANC Jul 12, 07:01 UTCJul 12, 16:25 UTC9h 25m
2026-07-12 CLX4326 - Jul 12, 03:45 UTCJul 12, 04:10 UTC25m
2026-07-12 CLX4326 - Jul 12, 00:50 UTCJul 12, 01:15 UTC25m
2026-07-11 CLX4326 - Jul 11, 21:45 UTCJul 11, 22:05 UTC20m
2026-07-11 CLX4326 - Jul 11, 10:35 UTCJul 11, 20:35 UTC10h 0m
2026-07-11 CLX272 - Jul 11, 00:05 UTCJul 11, 07:35 UTC7h 30m
2026-07-10 CLX272 ANC → ORD Jul 10, 15:15 UTCJul 10, 20:45 UTC5h 30m
2026-07-10 CLX272 - Jul 10, 04:10 UTCJul 10, 13:50 UTC9h 40m
2026-07-09 CLX4324 - Jul 9, 14:45 UTCJul 10, 01:40 UTC10h 55m
2026-07-08 CLX9363 TPE → LUX Jul 8, 18:15 UTCJul 9, 10:05 UTC15h 50m
2026-07-07 CLX9362 - Jul 7, 21:35 UTCJul 8, 15:45 UTC18h 10m
2026-07-07 CLX6232 - Jul 7, 07:20 UTCJul 7, 18:10 UTC10h 50m
2026-07-06 CLX6221 - Jul 6, 18:05 UTCJul 7, 05:00 UTC10h 55m
2026-07-06 CLX209 ORD → LUX Jul 6, 06:50 UTCJul 6, 14:35 UTC7h 45m
2026-07-05 CLX209 - Jul 5, 23:00 UTCJul 6, 04:05 UTC5h 5m
2026-07-05 CLX209 HKG → ANC Jul 5, 11:55 UTCJul 5, 21:25 UTC9h 30m
2026-07-05 CLX4326 - Jul 5, 08:30 UTCJul 5, 08:50 UTC20m
2026-07-05 CLX4326 - Jul 5, 05:20 UTCJul 5, 05:50 UTC30m
2026-07-04 CLX4326 - Jul 4, 15:00 UTCJul 5, 02:55 UTC11h 55m
2026-07-04 CLX83E - Jul 4, 04:30 UTCJul 4, 11:40 UTC7h 10m
2026-07-03 CLX83E ANC → ORD Jul 3, 18:20 UTCJul 4, 00:00 UTC5h 40m
2026-07-03 CLX5485 - Jul 3, 10:25 UTCJul 3, 17:00 UTC6h 35m
2026-07-02 CLX4484 LUX → CGO Jul 2, 16:20 UTCJul 3, 08:20 UTC16h 0m
2026-07-01 CLX9363 TPE → LUX Jul 1, 15:50 UTCJul 2, 10:05 UTC18h 15m
2026-06-30 CLX9362 LUX → TPE Jun 30, 21:05 UTCJul 1, 12:55 UTC15h 50m
2026-06-30 CLX5162 - Jun 30, 06:05 UTCJun 30, 16:00 UTC9h 55m
2026-06-29 CLX5161 - Jun 29, 17:05 UTCJun 29, 22:10 UTC5h 5m
2026-06-29 CLX283 HKG → ANC Jun 29, 06:29 UTCJun 29, 15:49 UTC9h 20m
2026-06-28 CLX4167 - Jun 28, 10:44 UTCJun 29, 03:10 UTC16h 25m
2026-06-27 CLX73M - Jun 27, 19:45 UTCJun 28, 04:29 UTC8h 45m
2026-06-27 CLX5166 GDL → LUX Jun 27, 15:45 UTCJun 27, 16:59 UTC1h 15m
2026-06-27 CLX5165 - Jun 27, 01:35 UTCJun 27, 06:19 UTC4h 45m
2026-06-26 CLX293 - Jun 26, 17:19 UTCJun 27, 00:20 UTC7h 0m
2026-06-26 CLX293 HKG → ANC Jun 26, 15:05 UTCJun 26, 15:25 UTC20m
2026-06-26 CLX4164 - Jun 26, 07:45 UTCJun 26, 08:24 UTC40m
2026-06-25 CLX4164 - Jun 25, 21:15 UTCJun 26, 01:05 UTC3h 50m
2026-06-25 CLX27J - Jun 25, 11:15 UTCJun 25, 18:29 UTC7h 15m
2026-06-25 CLX27J ANC → ORD Jun 25, 02:59 UTCJun 25, 08:20 UTC5h 20m
2026-06-24 CLX5723 - Jun 24, 18:25 UTCJun 25, 01:44 UTC7h 20m
2026-06-24 CLX5723 - Jun 24, 15:35 UTCJun 24, 15:49 UTC15m
2026-06-24 CLX4722 - Jun 24, 11:45 UTCJun 24, 13:14 UTC1h 30m
2026-06-23 CLX4722 - Jun 23, 16:05 UTCJun 24, 02:40 UTC10h 35m
2026-06-23 CLX52 - Jun 23, 06:44 UTCJun 23, 11:04 UTC4h 20m
2026-06-22 CLX52 - Jun 22, 10:49 UTCJun 23, 10:44 UTC23h 55m
2026-06-22 CLX7601 LUX → VCP Jun 22, 08:50 UTCJun 23, 08:00 UTC23h 10m
2026-06-22 CLX7601 LUX → VCP Jun 22, 07:25 UTCJun 23, 06:44 UTC23h 20m
2026-06-21 CLX942 - Jun 21, 23:44 UTCJun 22, 04:04 UTC4h 20m
2026-06-21 CLX942 - Jun 21, 13:44 UTCJun 21, 14:05 UTC20m

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-VCA page for operator, model, and routing details .

Mode-S 4D0103 frequently asked

What is Mode-S code 4D0103?
4D0103 is an ICAO 24-bit transponder address. Allocated to Luxembourg. Assigned to LX-VCA.
Where is Mode-S 4D0103 registered?
Mode-S code 4D0103 is allocated to Luxembourg (LU). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 4D0103 broadcasting right now?
No active broadcast right now. Last signal was 1d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 4D0103, octal 23200403, decimal 5,046,531.
What flights does 4D0103 operate?
Mode-S 4D0103 has broadcast 20 distinct callsigns, including CLX226, CLX83E, CLX4326, CLX7601, CLX52.