Apparatus

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sensors Mode-S transponder

4D23C3

ICAO 24-bit transponder address · allocated to Malta

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

Hex
4D23C3
Octal
23221703
Decimal
5,055,427
Country
MT
Tail
9H-CXG
Type
B738
No current signal · last broadcast 52m ago
Flights observed
316
Distinct callsigns
20
Country
MT
Last broadcast
52m ago

Last known position

Most recent position reported by Mode-S 4D23C3.

Country allocation

The ICAO 24-bit address 4D23C3 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
CXI3K - 19 2026-06-18
CXI6D - 16 2026-06-18
CXI5RU - 10 2026-05-01
CXI9X - 9 2026-07-11
CXI7PV - 9 2026-07-13
CXI48HY - 8 2026-07-08
CXI7F - 7 2026-07-10
CXI17ED Shanxi Airlines 6 2026-06-13
CXI18TY - 5 2026-05-14
CXI9TH - 4 2026-06-18
CXI8L Shanxi Airlines 4 2026-06-16
CXI8DF - 4 2026-07-05
CXI7R Shanxi Airlines 4 2026-06-16
CXI7GD Shanxi Airlines 4 2026-06-05
CXI66HY - 4 2026-06-18
CXI39TX Shanxi Airlines 4 2026-07-11
CXI37FZ - 4 2026-07-11
CXI33RE Shanxi Airlines 4 2026-06-30
CXI2L Shanxi Airlines 4 2026-06-05
CXI1T Shanxi Airlines 4 2026-06-28

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 CXI2217 - Jul 14, 09:40 UTCJul 14, 10:45 UTC1h 5m
2026-07-14 CXI2218 - Jul 14, 05:00 UTCJul 14, 07:20 UTC2h 20m
2026-07-14 CXI7FT - Jul 14, 01:00 UTCJul 14, 03:15 UTC2h 15m
2026-07-13 CXI7PV - Jul 13, 21:05 UTCJul 13, 23:50 UTC2h 45m
2026-07-13 CXI8DE DUS → HER Jul 13, 17:05 UTCJul 13, 19:45 UTC2h 40m
2026-07-13 CXI74KH HER → DUS Jul 13, 12:20 UTCJul 13, 15:30 UTC3h 10m
2026-07-13 CXI9369 - Jul 13, 07:25 UTCJul 13, 09:20 UTC1h 55m
2026-07-13 CXI9370 - Jul 13, 04:15 UTCJul 13, 06:25 UTC2h 10m
2026-07-13 CXI1YQ - Jul 13, 00:30 UTCJul 13, 02:45 UTC2h 15m
2026-07-12 CXI7PV - Jul 12, 20:55 UTCJul 12, 23:35 UTC2h 40m
2026-07-12 CXI6DP GRQ → HER Jul 12, 16:30 UTCJul 12, 19:30 UTC3h 0m
2026-07-12 CXI21DG HER → GRQ Jul 12, 11:55 UTCJul 12, 15:05 UTC3h 10m
2026-07-12 CXI425 - Jul 12, 07:45 UTCJul 12, 10:30 UTC2h 45m
2026-07-12 CXI426 - Jul 12, 02:45 UTCJul 12, 05:40 UTC2h 55m
2026-07-11 CXI25WL VIE → HER Jul 11, 18:50 UTCJul 11, 20:50 UTC2h 0m
2026-07-11 CXI6PR - Jul 11, 14:00 UTCJul 11, 16:10 UTC2h 10m
2026-07-11 CXI39TX WAW → HER Jul 11, 10:05 UTCJul 11, 12:20 UTC2h 15m
2026-07-11 CXI37FZ - Jul 11, 05:05 UTCJul 11, 07:40 UTC2h 35m
2026-07-11 CXI9X - Jul 11, 01:05 UTCJul 11, 03:45 UTC2h 40m
2026-07-10 CXI7F - Jul 10, 21:00 UTCJul 11, 00:00 UTC3h 0m
2026-07-10 CXI81PZ - Jul 10, 17:05 UTCJul 10, 18:50 UTC1h 45m
2026-07-10 CXI7Q - Jul 10, 14:10 UTCJul 10, 16:10 UTC2h 0m
2026-07-10 CXI8T CGN → HER Jul 10, 09:15 UTCJul 10, 11:45 UTC2h 30m
2026-07-10 CXI8E - Jul 10, 04:50 UTCJul 10, 07:45 UTC2h 55m
2026-07-09 CXI9X - Jul 9, 23:00 UTCJul 10, 01:35 UTC2h 35m
2026-07-09 CXI7F - Jul 9, 18:45 UTCJul 9, 21:55 UTC3h 10m
2026-07-09 CXI9C - Jul 9, 11:55 UTCJul 9, 15:15 UTC3h 20m
2026-07-09 CXI8EE - Jul 9, 06:25 UTCJul 9, 10:20 UTC3h 55m
2026-07-09 CXI6FL - Jul 9, 01:00 UTCJul 9, 03:15 UTC2h 15m
2026-07-08 CXI7PV - Jul 8, 21:00 UTCJul 8, 23:45 UTC2h 45m
2026-07-08 CXI7ZR LNZ → HER Jul 8, 17:25 UTCJul 8, 19:20 UTC1h 55m
2026-07-08 CXI48HY - Jul 8, 13:35 UTCJul 8, 15:55 UTC2h 20m
2026-07-08 CXI2TH - Jul 8, 09:45 UTCJul 8, 11:30 UTC1h 45m
2026-07-08 CXI8NX - Jul 8, 06:20 UTCJul 8, 08:35 UTC2h 15m
2026-07-08 CXI7FR - Jul 8, 00:55 UTCJul 8, 03:10 UTC2h 15m
2026-07-07 CXI7PV - Jul 7, 20:40 UTCJul 7, 23:15 UTC2h 35m
2026-07-07 CXI6WW KTW → HER Jul 7, 17:00 UTCJul 7, 19:05 UTC2h 5m
2026-07-07 CXI5VU - Jul 7, 13:10 UTCJul 7, 15:30 UTC2h 20m
2026-07-07 CXI2217 - Jul 7, 08:20 UTCJul 7, 10:10 UTC1h 50m
2026-07-07 CXI2218 - Jul 7, 05:00 UTCJul 7, 07:10 UTC2h 10m
2026-07-07 CXI7FT - Jul 7, 00:55 UTCJul 7, 03:10 UTC2h 15m
2026-07-06 CXI7PV - Jul 6, 21:30 UTCJul 7, 00:00 UTC2h 30m
2026-07-06 CXI8DE DUS → HER Jul 6, 17:25 UTCJul 6, 20:05 UTC2h 40m
2026-07-06 CXI66AG LPA → DUS Jul 6, 10:50 UTCJul 6, 14:50 UTC4h 0m
2026-07-06 CXI5V - Jul 6, 05:15 UTCJul 6, 09:20 UTC4h 5m
2026-07-06 CXI702 - Jul 6, 01:20 UTCJul 6, 04:15 UTC2h 55m
2026-07-05 CXI701 - Jul 5, 19:25 UTCJul 5, 22:00 UTC2h 35m
2026-07-05 CXI8DF - Jul 5, 10:15 UTCJul 5, 13:25 UTC3h 10m
2026-07-05 CXI1KE - Jul 5, 05:45 UTCJul 5, 08:25 UTC2h 40m
2026-07-04 CAI2W DUS → DUS Jul 4, 19:10 UTCJul 5, 04:10 UTC9h 0m

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

Mode-S 4D23C3 frequently asked

What is Mode-S code 4D23C3?
4D23C3 is an ICAO 24-bit transponder address. Allocated to Malta. Assigned to 9H-CXG.
Where is Mode-S 4D23C3 registered?
Mode-S code 4D23C3 is allocated to Malta (MT). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 4D23C3 broadcasting right now?
No active broadcast right now. Last signal was 52m ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 4D23C3, octal 23221703, decimal 5,055,427.
What flights does 4D23C3 operate?
Mode-S 4D23C3 has broadcast 20 distinct callsigns, including CXI3K, CXI6D, CXI5RU, CXI9X, CXI7PV.