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 9h ago
Flights observed
124
Distinct callsigns
20
Country
LU
Last broadcast
9h 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 Cargolux 7 2026-04-18
CLX5933 Cargolux 4 2026-04-16
CLX5932 - 4 2026-04-15
CLX27J - 4 2026-05-07
CLX261 Cargolux 4 2026-05-28
CLX237 - 4 2026-04-15
CLX7355 Cargolux 3 2026-05-02
CLX7337 Cargolux 3 2026-05-04
CLX7334 Cargolux 3 2026-04-24
CLX6694 Cargolux 3 2026-05-15
CLX5485 Cargolux 3 2026-04-17
CLX5483 Cargolux 3 2026-04-22
CLX4484 - 3 2026-04-16
CLX352 Cargolux 3 2026-04-25
CLX962 - 2 2026-05-05
CLX915 - 2 2026-05-25
CLX9016 Cargolux 2 2026-04-19
CLX9005 Cargolux 2 2026-05-29
CLX7625 Cargolux 2 2026-05-23

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-05-29 CLX9015 TPE → GYD May 29, 19:35 UTCMay 29, 19:55 UTC20m
2026-05-29 CLX9005 ICN → TPE May 29, 15:35 UTCMay 29, 15:55 UTC20m
2026-05-29 CLX9005 ICN → TPE May 29, 05:10 UTCMay 29, 14:55 UTC9h 45m
2026-05-28 CLX261 HKG → ANC May 28, 11:05 UTCMay 28, 17:45 UTC6h 40m
2026-05-28 CLX261 HKG → ANC May 28, 05:50 UTCMay 28, 08:00 UTC2h 10m
2026-05-27 CLX261 HKG → ANC May 27, 20:35 UTCMay 28, 03:45 UTC7h 10m
2026-05-27 CLX261 HKG → ANC May 27, 07:25 UTCMay 27, 16:50 UTC9h 25m
2026-05-27 CLX4802 DOH → LUX May 27, 02:34 UTCMay 27, 03:09 UTC35m
2026-05-26 CLX4802 DOH → LUX May 26, 15:29 UTCMay 26, 17:55 UTC2h 25m
2026-05-26 CLX6232 SCL → MIA May 26, 02:04 UTCMay 26, 12:30 UTC10h 25m
2026-05-25 CLX6221 LUX → VCP May 25, 12:10 UTCMay 25, 23:24 UTC11h 14m
2026-05-25 CLX915 - May 25, 04:30 UTCMay 25, 08:35 UTC4h 5m
2026-05-24 CLX915 - May 24, 18:55 UTCMay 24, 19:20 UTC25m
2026-05-24 CLX7956 HAN → HKG May 24, 16:05 UTCMay 24, 16:35 UTC30m
2026-05-23 CLX8S - May 23, 20:25 UTCMay 24, 09:15 UTC12h 50m
2026-05-23 CLX292 - May 23, 12:50 UTCMay 23, 17:00 UTC4h 10m
2026-05-23 CLX292 - May 23, 02:55 UTCMay 23, 03:10 UTC15m
2026-05-23 CLX7625 LUX → AMM May 23, 00:05 UTCMay 23, 00:40 UTC35m
2026-05-22 CLX7625 LUX → AMM May 22, 09:05 UTCMay 22, 19:10 UTC10h 5m
2026-05-21 CLX56R LAX → LUX May 21, 18:15 UTCMay 22, 04:05 UTC9h 50m
2026-05-21 CLX5164 LAX → LUX May 21, 08:20 UTCMay 21, 14:00 UTC5h 40m
2026-05-20 CLX5163 MEX → GDL May 20, 22:15 UTCMay 21, 04:10 UTC5h 55m
2026-05-20 CLX245 HKG → ANC May 20, 12:30 UTCMay 20, 20:50 UTC8h 20m
2026-05-20 CLX245 HKG → ANC May 20, 11:40 UTCMay 20, 11:55 UTC15m
2026-05-19 CLX4162 SAW → LUX May 19, 21:55 UTCMay 20, 09:20 UTC11h 26m
2026-05-19 CLX753 HKG → LUX May 19, 14:40 UTCMay 19, 18:50 UTC4h 10m
2026-05-19 CLX753 HKG → LUX May 19, 05:00 UTCMay 19, 05:20 UTC20m
2026-05-18 CLX9937 LUX → HKG May 18, 13:40 UTCMay 19, 01:10 UTC11h 29m
2026-05-16 CLX23K IAH → LUX May 16, 02:40 UTCMay 16, 11:35 UTC8h 56m
2026-05-15 CLX6694 GDL → LUX May 15, 23:15 UTCMay 16, 00:25 UTC1h 10m
2026-05-15 CLX6694 GDL → LUX May 15, 19:30 UTCMay 15, 19:40 UTC10m
2026-05-14 CLX6694 GDL → LUX May 14, 23:20 UTCMay 14, 23:30 UTC10m
2026-05-14 CLX6684 MEX → GDL May 14, 09:20 UTCMay 14, 20:25 UTC11h 5m
2026-05-14 CLX671 - May 14, 01:00 UTCMay 14, 05:35 UTC4h 35m
2026-05-13 CLX6353 - May 13, 15:10 UTCMay 13, 15:20 UTC10m
2026-05-13 CLX6353 - May 13, 10:25 UTCMay 13, 12:15 UTC1h 50m
2026-05-12 CLX9422 LUX → NRT May 12, 18:25 UTCMay 13, 07:25 UTC13h 0m
2026-05-10 CLX17G SEA → PIK May 10, 19:35 UTCMay 10, 21:04 UTC1h 30m
2026-05-10 CLX17G SEA → PIK May 10, 09:24 UTCMay 10, 17:25 UTC8h 0m
2026-05-10 CLX3 - May 10, 04:29 UTCMay 10, 06:35 UTC2h 5m
2026-05-09 CLX3 - May 9, 14:40 UTCMay 10, 01:34 UTC10h 55m
2026-05-08 CLX77 GYD → LUX May 8, 18:45 UTCMay 9, 09:45 UTC15h 0m
2026-05-08 CLX9364 GYD → LUX May 8, 04:19 UTCMay 8, 16:15 UTC11h 55m
2026-05-07 CLX27J ORD → LUX May 7, 00:00 UTCMay 7, 07:30 UTC7h 30m
2026-05-06 CLX27J - May 6, 15:15 UTCMay 6, 20:25 UTC5h 9m
2026-05-06 CLX5723 - May 6, 00:05 UTCMay 6, 13:40 UTC13h 35m
2026-05-05 CLX4722 - May 5, 10:35 UTCMay 5, 21:10 UTC10h 35m
2026-05-05 CLX962 - May 5, 03:25 UTCMay 5, 07:40 UTC4h 15m
2026-05-04 CLX962 - May 4, 17:15 UTCMay 4, 17:35 UTC20m
2026-05-04 CLX7337 CGK → HKG May 4, 14:40 UTCMay 4, 15:00 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 9h 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, CLX5933, CLX5932, CLX27J.