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 19d ago
Flights observed
98
Distinct callsigns
3
Country
LU
Last broadcast
19d 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 - 91 2026-07-21
JFA97Y - 6 2026-06-05
JFA85Q - 1 2026-05-30

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-21 JFA97Z IBZ → GVA Jul 21, 15:05 UTCJul 21, 16:40 UTC1h 35m
2026-07-21 JFA97Z OLB → IBZ Jul 21, 12:05 UTCJul 21, 13:20 UTC1h 15m
2026-07-21 JFA97Z BRN → OLB Jul 21, 09:05 UTCJul 21, 10:45 UTC1h 40m
2026-07-20 JFA97Z BRU → BRN Jul 20, 12:00 UTCJul 20, 12:55 UTC55m
2026-07-20 JFA97Z BRN → BRU Jul 20, 06:20 UTCJul 20, 07:15 UTC55m
2026-07-14 JFA97Z RNS → BRN Jul 14, 11:50 UTCJul 14, 13:05 UTC1h 15m
2026-07-14 JFA97Z BRN → RNS Jul 14, 08:20 UTCJul 14, 10:05 UTC1h 45m
2026-07-13 JFA97Z - Jul 13, 15:15 UTCJul 13, 16:40 UTC1h 25m
2026-07-13 JFA97Z - Jul 13, 11:50 UTCJul 13, 13:40 UTC1h 50m
2026-07-13 JFA97Z - Jul 13, 09:35 UTCJul 13, 10:20 UTC45m
2026-07-13 JFA97Z - Jul 13, 08:01 UTCJul 13, 08:45 UTC45m
2026-07-13 JFA97Z - Jul 13, 05:55 UTCJul 13, 06:45 UTC50m
2026-07-12 JFA97Z - Jul 12, 13:15 UTCJul 12, 14:01 UTC45m
2026-07-12 JFA97Z - Jul 12, 10:30 UTCJul 12, 12:10 UTC1h 40m
2026-07-12 JFA97Z GVA → FAB Jul 12, 08:01 UTCJul 12, 09:15 UTC1h 15m
2026-07-11 JFA97Z MXP → GVA Jul 11, 10:50 UTCJul 11, 11:25 UTC35m
2026-07-11 JFA97Z - Jul 11, 07:55 UTCJul 11, 09:30 UTC1h 35m
2026-07-11 JFA97Z - Jul 11, 05:20 UTCJul 11, 06:55 UTC1h 35m
2026-07-09 JFA97Z BRN → GVA Jul 9, 13:30 UTCJul 9, 13:55 UTC25m
2026-07-09 JFA97Z - Jul 9, 11:10 UTCJul 9, 12:35 UTC1h 25m
2026-07-09 JFA97Z ARN → OXF Jul 9, 07:35 UTCJul 9, 09:55 UTC2h 20m
2026-07-08 JFA97Z - Jul 8, 13:10 UTCJul 8, 16:00 UTC2h 50m
2026-07-08 JFA97Z - Jul 8, 10:10 UTCJul 8, 12:10 UTC2h 0m
2026-07-08 JFA97Z BRN → BDS Jul 8, 07:10 UTCJul 8, 08:50 UTC1h 40m
2026-07-07 JFA97Z - Jul 7, 12:10 UTCJul 7, 13:35 UTC1h 25m
2026-07-07 JFA97Z - Jul 7, 09:20 UTCJul 7, 10:35 UTC1h 15m
2026-07-06 JFA97Z - Jul 6, 14:00 UTCJul 6, 14:55 UTC55m
2026-07-06 JFA97Z BRN → PSA Jul 6, 11:55 UTCJul 6, 12:50 UTC55m
2026-07-01 JFA97Z - Jul 1, 14:05 UTCJul 1, 14:55 UTC50m
2026-07-01 JFA97Z BRN → PSA Jul 1, 12:05 UTCJul 1, 13:00 UTC55m
2026-06-26 JFA97Z - Jun 26, 08:30 UTCJun 26, 09:20 UTC50m
2026-06-26 JFA97Z BRN → PSA Jun 26, 06:04 UTCJun 26, 07:05 UTC1h 0m
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

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 19d 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.