Apparatus

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sensors Mode-S transponder

4D0109

ICAO 24-bit transponder address · allocated to Luxembourg

Currently assigned to LX-TCV · BOEING 747-400

Hex
4D0109
Octal
23200411
Decimal
5,046,537
Country
LU
Tail
LX-TCV
Type
B744
Broadcasting now · callsign CLX58 · 33,000 ft
Flights observed
165
Distinct callsigns
20
Country
LU
Last broadcast
12m ago

Current position

4D0109 is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address 4D0109 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 - 15 2026-06-07
CLX58 - 8 2026-07-17
CLX9723 Cargolux 6 2026-05-13
CLX75V Cargolux 6 2026-06-05
CLX57R Cargolux 6 2026-06-08
CLX57 - 6 2026-07-12
CLX2 - 6 2026-07-09
CLX42 - 5 2026-05-15
CLX9872 Cargolux 4 2026-06-03
CLX9725 - 4 2026-07-03
CLX79 - 4 2026-07-04
CLX78Y Cargolux 4 2026-06-20
CLX7 - 4 2026-07-06
CLX6694 Cargolux 4 2026-07-16
CLX6684 - 4 2026-07-16
CLX48 - 4 2026-04-13
CLX32 - 4 2026-06-03
CLX7941 - 3 2026-06-15
CLX74T - 3 2026-07-09
CLX56 - 3 2026-05-17

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-17 CLX58 - Jul 17, 21:25 UTCJul 17, 22:15 UTC50m
2026-07-17 CLX23K - Jul 17, 05:55 UTCJul 17, 15:05 UTC9h 10m
2026-07-16 CLX6694 GDL → LUX Jul 16, 22:05 UTCJul 17, 03:34 UTC5h 30m
2026-07-16 CLX6684 - Jul 16, 09:30 UTCJul 16, 19:45 UTC10h 15m
2026-07-16 CLX6684 - Jul 16, 08:55 UTCJul 16, 09:25 UTC30m
2026-07-16 CLX515 BUD → LUX Jul 16, 02:40 UTCJul 16, 04:15 UTC1h 35m
2026-07-15 CLX515 - Jul 15, 21:15 UTCJul 15, 22:30 UTC1h 15m
2026-07-15 CLX515 - Jul 15, 07:10 UTCJul 15, 07:25 UTC15m
2026-07-14 CLX9932 LUX → HKG Jul 14, 13:00 UTCJul 15, 00:25 UTC11h 24m
2026-07-12 CLX57 - Jul 12, 17:55 UTCJul 13, 07:01 UTC13h 5m
2026-07-12 CLX57 - Jul 12, 11:10 UTCJul 13, 07:01 UTC19h 50m
2026-07-11 CLX58 - Jul 11, 07:25 UTCJul 11, 11:10 UTC3h 45m
2026-07-10 CLX23K - Jul 10, 19:20 UTCJul 11, 04:15 UTC8h 55m
2026-07-10 CLX6694 - Jul 10, 11:30 UTCJul 10, 16:35 UTC5h 5m
2026-07-09 CLX6684 - Jul 9, 21:20 UTCJul 10, 08:35 UTC11h 15m
2026-07-09 CLX74T - Jul 9, 07:25 UTCJul 9, 15:00 UTC7h 35m
2026-07-09 CLX2 ORD → IND Jul 9, 04:25 UTCJul 9, 05:00 UTC35m
2026-07-08 CLX2 - Jul 8, 17:05 UTCJul 9, 01:40 UTC8h 35m
2026-07-07 CLX69B - Jul 7, 02:10 UTCJul 7, 09:50 UTC7h 40m
2026-07-06 CLX7 - Jul 6, 14:30 UTCJul 6, 23:10 UTC8h 40m
2026-07-06 CLX93D ORD → LUX Jul 6, 04:10 UTCJul 6, 11:35 UTC7h 25m
2026-07-05 CLX6696 - Jul 5, 06:30 UTCJul 5, 09:50 UTC3h 20m
2026-07-04 CLX6686 - Jul 4, 12:50 UTCJul 5, 00:10 UTC11h 20m
2026-07-04 CLX79 - Jul 4, 03:20 UTCJul 4, 04:40 UTC1h 20m
2026-07-03 CLX79 - Jul 3, 08:20 UTCJul 4, 04:40 UTC20h 20m
2026-07-03 CLX9725 - Jul 3, 06:20 UTCJul 4, 04:40 UTC22h 20m
2026-07-03 CLX9725 - Jul 3, 04:50 UTCJul 4, 04:15 UTC23h 25m
2026-07-02 CLX74T - Jul 2, 06:15 UTCJul 2, 13:25 UTC7h 10m
2026-07-02 CLX2 - Jul 2, 02:40 UTCJul 2, 03:15 UTC35m
2026-07-01 CLX2 - Jul 1, 14:30 UTCJul 1, 23:25 UTC8h 55m
2026-06-30 CLX7172 - Jun 30, 03:25 UTCJun 30, 17:35 UTC14h 10m
2026-06-29 CLX7191 - Jun 29, 13:24 UTCJun 29, 16:10 UTC2h 45m
2026-06-28 CLX93D ORD → LUX Jun 28, 20:34 UTCJun 29, 04:09 UTC7h 35m
2026-06-28 CLX6696 - Jun 28, 06:10 UTCJun 28, 09:15 UTC3h 5m
2026-06-27 CLX6686 - Jun 27, 16:00 UTCJun 28, 02:54 UTC10h 55m
2026-06-27 CLX79 - Jun 27, 06:59 UTCJun 27, 11:20 UTC4h 20m
2026-06-26 CLX79 - Jun 26, 12:19 UTCJun 27, 11:20 UTC23h 0m
2026-06-26 CLX9725 - Jun 26, 10:20 UTCJun 27, 10:14 UTC23h 55m
2026-06-26 CLX9725 - Jun 26, 10:05 UTCJun 27, 08:14 UTC22h 10m
2026-06-25 CLX74T - Jun 25, 08:30 UTCJun 25, 15:44 UTC7h 15m
2026-06-25 CLX2 ORD → IND Jun 25, 04:10 UTCJun 25, 04:45 UTC35m
2026-06-24 CLX2 - Jun 24, 15:44 UTCJun 25, 00:44 UTC9h 0m
2026-06-22 CLX69B ORD → LUX Jun 22, 08:00 UTCJun 22, 15:24 UTC7h 25m
2026-06-21 CLX7 - Jun 21, 17:54 UTCJun 22, 02:45 UTC8h 50m
2026-06-21 CLX98V DFW → LUX Jun 21, 00:25 UTCJun 21, 09:10 UTC8h 45m
2026-06-20 CLX78Y LUX → ORD Jun 20, 20:00 UTCJun 20, 21:55 UTC1h 55m
2026-06-20 CLX78Y LUX → ORD Jun 20, 09:09 UTCJun 20, 17:29 UTC8h 20m
2026-06-19 CLX37 - Jun 19, 12:59 UTCJun 19, 17:24 UTC4h 25m
2026-06-18 CLX39 - Jun 18, 08:05 UTCJun 18, 12:00 UTC3h 55m
2026-06-15 CLX7941 BUD → LUX Jun 15, 17:45 UTCJun 15, 19:14 UTC1h 30m

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

Mode-S 4D0109 frequently asked

What is Mode-S code 4D0109?
4D0109 is an ICAO 24-bit transponder address. Allocated to Luxembourg. Assigned to LX-TCV.
Where is Mode-S 4D0109 registered?
Mode-S code 4D0109 is allocated to Luxembourg (LU). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 4D0109 broadcasting right now?
Yes. Mode-S 4D0109 is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 4D0109, octal 23200411, decimal 5,046,537.
What flights does 4D0109 operate?
Mode-S 4D0109 has broadcast 20 distinct callsigns, including CLX8, CLX58, CLX9723, CLX75V, CLX57R.