Apparatus

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sensors Mode-S transponder

4D0290

ICAO 24-bit transponder address · allocated to Luxembourg

Currently assigned to LX-RSQ · LEARJET 45

Hex
4D0290
Octal
23201220
Decimal
5,046,928
Country
LU
Tail
LX-RSQ
Type
LJ45
No current signal · last broadcast 27d ago
Flights observed
70
Distinct callsigns
20
Country
LU
Last broadcast
27d ago

Last known position

Most recent position reported by Mode-S 4D0290.

Country allocation

The ICAO 24-bit address 4D0290 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
LRQ310K - 4 2026-07-20
LRQ303C - 4 2026-07-15
LRQ275E - 4 2026-06-30
LRQ261A - 4 2026-06-21
LRQ253C - 4 2026-06-17
LRQ235E - 4 2026-06-08
LRQ226F - 4 2026-06-01
LRQ295E - 3 2026-07-09
LRQ292B - 3 2026-07-10
LRQ273C - 3 2026-06-29
LRQ268H - 3 2026-06-26
LRQ265E - 3 2026-06-25
LRQ256F - 3 2026-06-19
LRQ254D - 3 2026-06-18
LRQ216F - 3 2026-05-23
LRQ212B - 3 2026-05-30
LRQ321A - 2 2026-07-24
LRQ313C - 2 2026-07-19
LRQ311A - 2 2026-07-18
LRQ289J - 2 2026-07-08

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-25 LRQ323C BOD → LUX Jul 25, 08:00 UTCJul 25, 09:10 UTC1h 10m
2026-07-24 LRQ321A - Jul 24, 04:10 UTCJul 24, 05:10 UTC1h 0m
2026-07-24 LRQ321A LUX → BOD Jul 24, 02:30 UTCJul 24, 03:45 UTC1h 15m
2026-07-23 LRQ318H EMA → LUX Jul 23, 19:45 UTCJul 23, 20:45 UTC1h 0m
2026-07-20 LRQ310K - Jul 20, 13:15 UTCJul 20, 15:05 UTC1h 50m
2026-07-20 LRQ310K - Jul 20, 10:30 UTCJul 20, 12:35 UTC2h 5m
2026-07-19 LRQ310K - Jul 19, 17:00 UTCJul 19, 18:55 UTC1h 55m
2026-07-19 LRQ310K - Jul 19, 13:55 UTCJul 19, 16:25 UTC2h 30m
2026-07-19 LRQ313C - Jul 19, 11:20 UTCJul 19, 12:15 UTC55m
2026-07-19 LRQ313C ZRH → FNI Jul 19, 09:55 UTCJul 19, 10:50 UTC55m
2026-07-18 LRQ311A - Jul 18, 17:50 UTCJul 18, 19:30 UTC1h 40m
2026-07-18 LRQ311A - Jul 18, 11:20 UTCJul 18, 13:00 UTC1h 40m
2026-07-15 LRQ303C BOH → LUX Jul 15, 13:35 UTCJul 15, 14:30 UTC55m
2026-07-15 LRQ303C - Jul 15, 08:05 UTCJul 15, 11:20 UTC3h 15m
2026-07-14 LRQ303C - Jul 14, 12:50 UTCJul 14, 14:20 UTC1h 30m
2026-07-14 LRQ303C LUX → SVQ Jul 14, 09:20 UTCJul 14, 12:05 UTC2h 45m
2026-07-10 LRQ292B - Jul 10, 18:00 UTCJul 10, 18:55 UTC55m
2026-07-10 LRQ292B - Jul 10, 12:00 UTCJul 10, 15:10 UTC3h 10m
2026-07-10 LRQ292B - Jul 10, 06:10 UTCJul 10, 08:00 UTC1h 50m
2026-07-09 LRQ295E - Jul 9, 12:30 UTCJul 9, 12:55 UTC25m
2026-07-09 LRQ295E - Jul 9, 06:05 UTCJul 9, 06:40 UTC35m
2026-07-09 LRQ295E - Jul 9, 05:10 UTCJul 9, 05:30 UTC20m
2026-07-08 LRQ289J GCI → CFE Jul 8, 13:00 UTCJul 8, 14:00 UTC1h 0m
2026-07-08 LRQ289J - Jul 8, 10:10 UTCJul 8, 11:05 UTC55m
2026-06-30 LRQ275E TLS → LUX Jun 30, 11:45 UTCJun 30, 12:55 UTC1h 10m
2026-06-30 LRQ275E - Jun 30, 10:20 UTCJun 30, 11:20 UTC1h 0m
2026-06-30 LRQ275E - Jun 30, 06:15 UTCJun 30, 07:20 UTC1h 5m
2026-06-30 LRQ275E - Jun 30, 04:00 UTCJun 30, 05:15 UTC1h 15m
2026-06-29 LRQ273C LPL → LUX Jun 29, 17:19 UTCJun 29, 18:25 UTC1h 5m
2026-06-29 LRQ273C MLA → LPL Jun 29, 11:39 UTCJun 29, 14:54 UTC3h 15m
2026-06-29 LRQ273C - Jun 29, 06:14 UTCJun 29, 08:35 UTC2h 20m
2026-06-26 LRQ268H CGN → LUX Jun 26, 16:54 UTCJun 26, 17:19 UTC25m
2026-06-26 LRQ268H KUN → CGN Jun 26, 14:44 UTCJun 26, 16:30 UTC1h 45m
2026-06-26 LRQ268H - Jun 26, 12:19 UTCJun 26, 14:05 UTC1h 45m
2026-06-25 LRQ265E - Jun 25, 19:34 UTCJun 25, 21:50 UTC2h 15m
2026-06-25 LRQ265E SVQ → SVQ Jun 25, 11:10 UTCJun 25, 18:50 UTC7h 40m
2026-06-24 LRQ265E - Jun 24, 17:14 UTCJun 24, 18:55 UTC1h 40m
2026-06-24 LRQ263C - Jun 24, 12:09 UTCJun 24, 14:15 UTC2h 5m
2026-06-24 LRQ263C - Jun 24, 06:10 UTCJun 24, 08:14 UTC2h 5m
2026-06-21 LRQ261A - Jun 21, 13:54 UTCJun 21, 14:24 UTC30m
2026-06-21 LRQ261A - Jun 21, 12:35 UTCJun 21, 13:15 UTC40m
2026-06-21 LRQ261A - Jun 21, 07:29 UTCJun 21, 08:15 UTC45m
2026-06-21 LRQ261A - Jun 21, 05:49 UTCJun 21, 06:24 UTC35m
2026-06-19 LRQ256F - Jun 19, 18:25 UTCJun 19, 18:54 UTC30m
2026-06-19 LRQ256F - Jun 19, 11:34 UTCJun 19, 13:24 UTC1h 50m
2026-06-19 LRQ256F - Jun 19, 06:24 UTCJun 19, 08:14 UTC1h 50m
2026-06-18 LRQ254D MAN → LUX Jun 18, 17:21 UTCJun 18, 18:25 UTC1h 4m
2026-06-18 LRQ254D - Jun 18, 11:40 UTCJun 18, 14:01 UTC2h 20m
2026-06-18 LRQ254D - Jun 18, 06:05 UTCJun 18, 08:00 UTC1h 55m
2026-06-17 LRQ253C - Jun 17, 13:35 UTCJun 17, 14:20 UTC45m

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

Mode-S 4D0290 frequently asked

What is Mode-S code 4D0290?
4D0290 is an ICAO 24-bit transponder address. Allocated to Luxembourg. Assigned to LX-RSQ.
Where is Mode-S 4D0290 registered?
Mode-S code 4D0290 is allocated to Luxembourg (LU). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 4D0290 broadcasting right now?
No active broadcast right now. Last signal was 27d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 4D0290, octal 23201220, decimal 5,046,928.
What flights does 4D0290 operate?
Mode-S 4D0290 has broadcast 20 distinct callsigns, including LRQ310K, LRQ303C, LRQ275E, LRQ261A, LRQ253C.