Apparatus

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sensors Mode-S transponder

4D029D

ICAO 24-bit transponder address · allocated to Luxembourg

Currently assigned to LX-SEH

Hex
4D029D
Octal
23201235
Decimal
5,046,941
Country
LU
Tail
LX-SEH
Type
C56X
No current signal · last broadcast 1d ago
Flights observed
66
Distinct callsigns
3
Country
LU
Last broadcast
1d ago

Last known position

Most recent position reported by Mode-S 4D029D.

Country allocation

The ICAO 24-bit address 4D029D 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 3 distinct

Callsign Airline Flights Last seen
JFA97Z - 59 2026-06-24
JFA97Y - 6 2026-06-05
JFA85Q - 1 2026-05-30

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-06-24 JFA97Z - Jun 24, 12:40 UTCJun 24, 13:50 UTC1h 10m
2026-06-24 JFA97Z - Jun 24, 08:45 UTCJun 24, 10:55 UTC2h 10m
2026-06-24 JFA97Z GVA → BQH Jun 24, 06:04 UTCJun 24, 07:20 UTC1h 15m
2026-06-22 JFA97Z - Jun 22, 16:05 UTCJun 22, 16:29 UTC25m
2026-06-22 JFA97Z - Jun 22, 14:14 UTCJun 22, 15:05 UTC50m
2026-06-22 JFA97Z NCE → CEQ Jun 22, 12:34 UTCJun 22, 12:44 UTC10m
2026-06-20 JFA97Z - Jun 20, 16:49 UTCJun 20, 18:10 UTC1h 20m
2026-06-20 JFA97Z - Jun 20, 12:30 UTCJun 20, 13:24 UTC55m
2026-06-19 JFA97Z VIP → FAB Jun 19, 14:15 UTCJun 19, 15:39 UTC1h 25m
2026-06-18 JFA97Z - Jun 18, 11:35 UTCJun 18, 14:05 UTC2h 30m
2026-06-18 JFA97Z - Jun 18, 08:25 UTCJun 18, 10:35 UTC2h 10m
2026-06-17 JFA97Z ZRH → NCE Jun 17, 13:50 UTCJun 17, 14:40 UTC50m
2026-06-17 JFA97Z - Jun 17, 11:35 UTCJun 17, 12:35 UTC1h 0m
2026-06-17 JFA97Z - Jun 17, 09:45 UTCJun 17, 10:00 UTC15m
2026-06-17 JFA97Z VIP → CEQ Jun 17, 07:55 UTCJun 17, 08:50 UTC55m
2026-06-16 JFA97Z - Jun 16, 16:05 UTCJun 16, 17:24 UTC1h 20m
2026-06-16 JFA97Z NCE → NHT Jun 16, 13:15 UTCJun 16, 15:09 UTC1h 55m
2026-06-15 JFA97Z - Jun 15, 11:10 UTCJun 15, 12:49 UTC1h 40m
2026-06-15 JFA97Z - Jun 15, 07:55 UTCJun 15, 09:05 UTC1h 10m
2026-06-15 JFA97Z - Jun 15, 06:10 UTCJun 15, 06:40 UTC30m
2026-06-14 JFA97Z - Jun 14, 16:10 UTCJun 14, 16:50 UTC40m
2026-06-14 JFA97Z MXP → FAB Jun 14, 11:25 UTCJun 14, 13:05 UTC1h 40m
2026-06-13 JFA97Z - Jun 13, 15:00 UTCJun 13, 16:50 UTC1h 50m
2026-06-13 JFA97Z - Jun 13, 12:05 UTCJun 13, 13:35 UTC1h 30m
2026-06-13 JFA97Z ZRH → NCE Jun 13, 10:15 UTCJun 13, 11:10 UTC55m
2026-06-13 JFA97Z NCE → ZRH Jun 13, 07:35 UTCJun 13, 08:35 UTC1h 0m
2026-06-12 JFA97Z BCN → NCE Jun 12, 17:25 UTCJun 12, 18:25 UTC1h 0m
2026-06-12 JFA97Z - Jun 12, 14:55 UTCJun 12, 15:45 UTC50m
2026-06-12 JFA97Z NCE → CEQ Jun 12, 13:15 UTCJun 12, 13:25 UTC10m
2026-06-12 JFA97Z - Jun 12, 08:40 UTCJun 12, 09:50 UTC1h 10m
2026-06-11 JFA97Z - Jun 11, 13:15 UTCJun 11, 14:05 UTC50m
2026-06-11 JFA97Z - Jun 11, 10:15 UTCJun 11, 12:25 UTC2h 10m
2026-06-10 JFA97Z LBG → NCE Jun 10, 17:10 UTCJun 10, 18:25 UTC1h 15m
2026-06-10 JFA97Z BER → LBG Jun 10, 14:35 UTCJun 10, 16:05 UTC1h 30m
2026-06-10 JFA97Z VIP → BER Jun 10, 10:55 UTCJun 10, 12:05 UTC1h 10m
2026-06-09 JFA97Z - Jun 9, 12:50 UTCJun 9, 15:15 UTC2h 25m
2026-06-08 JFA97Z - Jun 8, 19:50 UTCJun 8, 20:35 UTC45m
2026-06-08 JFA97Z - Jun 8, 16:15 UTCJun 8, 18:55 UTC2h 40m
2026-06-07 JFA97Z LCY → CEQ Jun 7, 12:50 UTCJun 7, 14:45 UTC1h 55m
2026-06-07 JFA97Z - Jun 7, 11:10 UTCJun 7, 11:45 UTC35m
2026-06-05 JFA97Y - Jun 5, 16:20 UTCJun 5, 17:10 UTC50m
2026-06-05 JFA97Y VIP → BRU Jun 5, 13:30 UTCJun 5, 14:25 UTC55m
2026-06-05 JFA97Y NCE → VIP Jun 5, 09:20 UTCJun 5, 10:05 UTC45m
2026-06-05 JFA97Y ZRH → NCE Jun 5, 07:20 UTCJun 5, 08:20 UTC1h 0m
2026-06-04 JFA97Y VIP → ZRH Jun 4, 15:15 UTCJun 4, 15:50 UTC35m
2026-06-03 JFA97Y BXO → VIP Jun 3, 12:35 UTCJun 3, 12:55 UTC20m
2026-05-30 JFA85Q VIP → BXO May 30, 07:30 UTCMay 30, 07:50 UTC20m
2026-05-28 JFA97Z - May 28, 08:35 UTCMay 28, 09:30 UTC55m
2026-05-28 JFA97Z BXO → PSA May 28, 06:25 UTCMay 28, 07:05 UTC40m
2026-05-22 JFA97Z - May 22, 11:05 UTCMay 22, 13:15 UTC2h 10m

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

Mode-S 4D029D frequently asked

What is Mode-S code 4D029D?
4D029D is an ICAO 24-bit transponder address. Allocated to Luxembourg. Assigned to LX-SEH.
Where is Mode-S 4D029D registered?
Mode-S code 4D029D is allocated to Luxembourg (LU). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 4D029D 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 4D029D, octal 23201235, decimal 5,046,941.
What flights does 4D029D operate?
Mode-S 4D029D has broadcast 3 distinct callsigns, including JFA97Z, JFA97Y, JFA85Q.