Apparatus

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sensors Mode-S transponder

4D239B

ICAO 24-bit transponder address · allocated to Malta

Currently assigned to 9H-CXE · BOEING 737-800

Hex
4D239B
Octal
23221633
Decimal
5,055,387
Country
MT
Tail
9H-CXE
Type
B738
No current signal · last broadcast 1d ago
Flights observed
190
Distinct callsigns
20
Country
MT
Last broadcast
1d ago

Last known position

Most recent position reported by Mode-S 4D239B.

Country allocation

The ICAO 24-bit address 4D239B falls within the block assigned to Malta (MT) by ICAO Annex 10, Volume III. Every aircraft registered in Malta 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
CXI5RU - 24 2026-06-07
CXI7U Shanxi Airlines 9 2026-06-05
CXI6B Shanxi Airlines 9 2026-06-05
CXI9C Shanxi Airlines 8 2026-05-11
CXI19GZ Shanxi Airlines 8 2026-06-07
CXI7PV Shanxi Airlines 6 2026-05-08
CXI9MA Shanxi Airlines 4 2026-05-08
CXI9GQ - 4 2026-06-06
CXI6EY - 4 2026-06-04
CXI3A Shanxi Airlines 4 2026-06-07
CXI2D - 4 2026-06-05
CXI99NH - 3 2026-04-24
CXI97AG Shanxi Airlines 3 2026-05-11
CXI93GA Shanxi Airlines 3 2026-06-03
CXI8MM - 3 2026-04-13
CXI8EE Shanxi Airlines 3 2026-05-07
CXI7Z Shanxi Airlines 3 2026-04-23
CXI7W Shanxi Airlines 3 2026-06-01
CXI74KH Shanxi Airlines 3 2026-05-08
CXI4KJ Shanxi Airlines 3 2026-05-30

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-06-11 CXI7J FUE → NUE Jun 11, 15:55 UTCJun 11, 18:30 UTC2h 35m
2026-06-11 CXI26LQ NUE → KGS Jun 11, 12:00 UTCJun 11, 14:40 UTC2h 40m
2026-06-11 CXI558 - Jun 11, 08:40 UTCJun 11, 10:45 UTC2h 5m
2026-06-11 CXI557 NUE → PMI Jun 11, 05:15 UTCJun 11, 07:00 UTC1h 45m
2026-06-09 CXI7QC LPA → NUE Jun 9, 21:00 UTCJun 9, 22:10 UTC1h 10m
2026-06-09 CXI84MY NUE → LPA Jun 9, 12:45 UTCJun 9, 19:40 UTC6h 55m
2026-06-08 CXI81UN RHO → NUE Jun 8, 17:25 UTCJun 8, 20:10 UTC2h 45m
2026-06-08 CXI1P NUE → RHO Jun 8, 13:30 UTCJun 8, 16:00 UTC2h 30m
2026-06-08 CXI6MY KGS → NUE Jun 8, 09:45 UTCJun 8, 12:25 UTC2h 40m
2026-06-08 CXI3Z CGN → ACE Jun 8, 05:15 UTCJun 8, 07:40 UTC2h 25m
2026-06-08 CXI025P DUS → ISL Jun 8, 03:20 UTCJun 8, 03:50 UTC30m
2026-06-07 CXI3A FUE → CGN Jun 7, 18:10 UTCJun 7, 22:05 UTC3h 55m
2026-06-07 CXI19GZ CGN → FUE Jun 7, 12:55 UTCJun 7, 16:50 UTC3h 55m
2026-06-07 CXI5RU - Jun 7, 08:10 UTCJun 7, 11:10 UTC3h 0m
2026-06-07 CXI54DN - Jun 7, 03:35 UTCJun 7, 06:10 UTC2h 35m
2026-06-06 CXI3H CGN → HRG Jun 6, 12:54 UTCJun 6, 23:35 UTC10h 40m
2026-06-06 CXI5RU - Jun 6, 07:40 UTCJun 6, 10:50 UTC3h 10m
2026-06-06 CXI9GQ - Jun 6, 03:15 UTCJun 6, 05:55 UTC2h 40m
2026-06-05 CXI5RU - Jun 5, 16:55 UTCJun 5, 19:55 UTC3h 0m
2026-06-05 CXI2D - Jun 5, 12:50 UTCJun 5, 15:25 UTC2h 35m
2026-06-05 CXI6B RHO → CGN Jun 5, 08:15 UTCJun 5, 11:30 UTC3h 15m
2026-06-05 CXI7U CGN → RHO Jun 5, 03:35 UTCJun 5, 06:30 UTC2h 55m
2026-06-04 CXI19GZ CGN → FUE Jun 4, 14:35 UTCJun 4, 23:35 UTC9h 0m
2026-06-04 CXI5RU - Jun 4, 10:10 UTCJun 4, 13:25 UTC3h 15m
2026-06-04 CXI6EY - Jun 4, 06:00 UTCJun 4, 08:35 UTC2h 35m
2026-06-04 CXI6EY CGN → CGN Jun 4, 03:20 UTCJun 4, 04:25 UTC1h 5m
2026-06-03 CXI6B RHO → CGN Jun 3, 18:30 UTCJun 3, 21:45 UTC3h 15m
2026-06-03 CXI7U CGN → RHO Jun 3, 14:25 UTCJun 3, 17:30 UTC3h 5m
2026-06-03 CXI5RU - Jun 3, 08:30 UTCJun 3, 11:25 UTC2h 55m
2026-06-03 CXI93GA CGN → HER Jun 3, 03:55 UTCJun 3, 06:45 UTC2h 50m
2026-06-02 CXI3CN HER → CGN Jun 2, 16:50 UTCJun 2, 19:55 UTC3h 5m
2026-06-02 CXI6LE CGN → HER Jun 2, 12:30 UTCJun 2, 15:15 UTC2h 45m
2026-06-02 CXI5RU - Jun 2, 07:35 UTCJun 2, 10:45 UTC3h 10m
2026-06-02 CXI3PV CGN → HER Jun 2, 03:00 UTCJun 2, 05:55 UTC2h 55m
2026-06-01 CXI5RU - Jun 1, 18:20 UTCJun 1, 21:35 UTC3h 15m
2026-06-01 CXI7W HRG → CGN Jun 1, 14:20 UTCJun 1, 17:00 UTC2h 40m
2026-06-01 CXI6B RHO → CGN Jun 1, 08:15 UTCJun 1, 11:30 UTC3h 15m
2026-06-01 CXI7U CGN → RHO Jun 1, 03:40 UTCJun 1, 06:45 UTC3h 5m
2026-05-31 CXI3A FUE → CGN May 31, 18:05 UTCMay 31, 21:55 UTC3h 50m
2026-05-31 CXI19GZ CGN → FUE May 31, 12:50 UTCMay 31, 16:35 UTC3h 45m
2026-05-31 CXI5RU - May 31, 08:25 UTCMay 31, 08:55 UTC30m
2026-05-30 CXI4KJ HRG → CGN May 30, 13:05 UTCMay 31, 00:15 UTC11h 10m
2026-05-30 CXI5RU - May 30, 05:50 UTCMay 30, 08:55 UTC3h 5m
2026-05-30 CXI9GQ - May 30, 01:35 UTCMay 30, 04:10 UTC2h 35m
2026-05-29 CXI5RU - May 29, 17:20 UTCMay 29, 20:40 UTC3h 20m
2026-05-29 CXI2D - May 29, 13:00 UTCMay 29, 15:40 UTC2h 40m
2026-05-29 CXI6B RHO → CGN May 29, 07:55 UTCMay 29, 11:15 UTC3h 20m
2026-05-29 CXI7U CGN → RHO May 29, 03:45 UTCMay 29, 06:45 UTC3h 0m
2026-05-28 CXI3A FUE → CGN May 28, 18:30 UTCMay 28, 22:35 UTC4h 5m
2026-05-28 CXI19GZ CGN → FUE May 28, 13:00 UTCMay 28, 16:40 UTC3h 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 9H-CXE page for operator, model, and routing details .

Mode-S 4D239B frequently asked

What is Mode-S code 4D239B?
4D239B is an ICAO 24-bit transponder address. Allocated to Malta. Assigned to 9H-CXE.
Where is Mode-S 4D239B registered?
Mode-S code 4D239B is allocated to Malta (MT). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 4D239B 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 4D239B, octal 23221633, decimal 5,055,387.
What flights does 4D239B operate?
Mode-S 4D239B has broadcast 20 distinct callsigns, including CXI5RU, CXI7U, CXI6B, CXI9C, CXI19GZ.