Apparatus

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sensors Mode-S transponder

4D239C

ICAO 24-bit transponder address · allocated to Malta

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

Hex
4D239C
Octal
23221634
Decimal
5,055,388
Country
MT
Tail
9H-CXF
Type
B738
Broadcasting now · callsign CXI7Q · 36,000 ft
Flights observed
428
Distinct callsigns
20
Country
MT
Last broadcast
Jul 26, 22:00 UTC

Current position

4D239C is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address 4D239C 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
SEJ681 Spicejet 32 2026-05-27
SEJ630 Spicejet 27 2026-05-27
CXI5RU - 26 2026-07-25
SEJ682 Spicejet 25 2026-05-27
SEJ631 Spicejet 23 2026-05-27
SEJ199 Spicejet 23 2026-05-07
SEJ151 Spicejet 15 2026-05-29
SEJ683 Spicejet 14 2026-05-26
SEJ200 Spicejet 13 2026-05-07
CXI6LE Shanxi Airlines 13 2026-07-24
SEJ674 Spicejet 12 2026-04-22
SEJ684 Spicejet 10 2026-05-26
SEJ903 Spicejet 9 2026-05-07
CXI7U Shanxi Airlines 9 2026-07-20
CXI6B Shanxi Airlines 9 2026-07-20
CXI3H Shanxi Airlines 9 2026-07-19
SEJ672 Spicejet 8 2026-04-22
SEJ152 Spicejet 8 2026-05-29
SEJ902 Spicejet 7 2026-05-07
CAI9F Corendon Airlines 7 2026-07-25

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 CXI701 DUS → NDR Jul 26, 19:25 UTCJul 26, 22:00 UTC2h 35m
2026-07-26 CXI67FR DUS → DUS Jul 26, 08:10 UTCJul 26, 17:30 UTC9h 20m
2026-07-26 CAI51AE ADB → DUS Jul 26, 03:25 UTCJul 26, 06:25 UTC3h 0m
2026-07-25 CAI7KJ CGN → ADB Jul 25, 23:30 UTCJul 26, 01:55 UTC2h 25m
2026-07-25 CAI3SD AYT → CGN Jul 25, 18:45 UTCJul 25, 22:05 UTC3h 20m
2026-07-25 CAI113 - Jul 25, 16:35 UTCJul 25, 17:05 UTC30m
2026-07-25 CAI9F AYT → ZRH Jul 25, 11:10 UTCJul 25, 14:35 UTC3h 25m
2026-07-25 CXI5RU - Jul 25, 06:10 UTCJul 25, 09:25 UTC3h 15m
2026-07-25 CXI9GQ - Jul 25, 01:45 UTCJul 25, 04:15 UTC2h 30m
2026-07-24 CXI41BE HER → CGN Jul 24, 20:10 UTCJul 24, 23:25 UTC3h 15m
2026-07-24 CXI6LE CGN → HER Jul 24, 15:45 UTCJul 24, 18:15 UTC2h 30m
2026-07-24 CXI2FA CGN → LPA Jul 24, 05:00 UTCJul 24, 14:30 UTC9h 30m
2026-07-23 CXI21PG - Jul 23, 15:10 UTCJul 23, 18:20 UTC3h 10m
2026-07-23 CXI6LE CGN → HER Jul 23, 10:45 UTCJul 23, 13:20 UTC2h 35m
2026-07-22 CAI6KC ASR → CGN Jul 22, 22:20 UTCJul 23, 06:15 UTC7h 55m
2026-07-22 CXI3A - Jul 22, 16:30 UTCJul 22, 20:05 UTC3h 35m
2026-07-22 CXI19GZ CGN → FUE Jul 22, 11:30 UTCJul 22, 14:50 UTC3h 20m
2026-07-22 CXI5RU - Jul 22, 10:20 UTCJul 22, 11:20 UTC1h 0m
2026-07-22 CXI93GA CGN → HER Jul 22, 02:00 UTCJul 22, 04:35 UTC2h 35m
2026-07-21 CXI3CN HER → CGN Jul 21, 16:40 UTCJul 21, 19:40 UTC3h 0m
2026-07-21 CXI6LE CGN → HER Jul 21, 12:30 UTCJul 21, 15:10 UTC2h 40m
2026-07-21 CXI19GZ CGN → FUE Jul 21, 01:55 UTCJul 21, 11:20 UTC9h 25m
2026-07-20 CXI58QA - Jul 20, 20:15 UTCJul 20, 23:55 UTC3h 40m
2026-07-20 CXI2FA CGN → LPA Jul 20, 14:15 UTCJul 20, 18:20 UTC4h 5m
2026-07-20 CXI6B RHO → CGN Jul 20, 09:40 UTCJul 20, 12:55 UTC3h 15m
2026-07-20 CXI7U CGN → RHO Jul 20, 05:20 UTCJul 20, 08:15 UTC2h 55m
2026-07-19 CAI5UB CGN → CGN Jul 19, 18:50 UTCJul 20, 03:05 UTC8h 15m
2026-07-19 CXI3H CGN → HRG Jul 19, 06:45 UTCJul 19, 17:10 UTC10h 25m
2026-07-18 CAI12FE CGN → ASR Jul 18, 21:10 UTCJul 19, 05:20 UTC8h 10m
2026-07-18 CAI3SD - Jul 18, 15:40 UTCJul 18, 19:10 UTC3h 30m
2026-07-18 CAI9F CGN → AYT Jul 18, 10:55 UTCJul 18, 14:05 UTC3h 10m
2026-07-18 CXI5RU - Jul 18, 06:25 UTCJul 18, 09:25 UTC3h 0m
2026-07-18 CXI9GQ - Jul 18, 01:54 UTCJul 18, 04:35 UTC2h 41m
2026-07-17 CXI41BE HER → CGN Jul 17, 20:10 UTCJul 17, 23:35 UTC3h 25m
2026-07-17 CXI6LE CGN → HER Jul 17, 15:35 UTCJul 17, 18:05 UTC2h 30m
2026-07-17 CXI5CX - Jul 17, 10:15 UTCJul 17, 13:45 UTC3h 30m
2026-07-17 CXI2FA CGN → LPA Jul 17, 04:14 UTCJul 17, 08:25 UTC4h 10m
2026-07-16 CXI4KJ CGN → CGN Jul 16, 13:00 UTCJul 16, 23:35 UTC10h 35m
2026-07-16 CAI3SD - Jul 16, 07:50 UTCJul 16, 11:20 UTC3h 30m
2026-07-16 CAI9F - Jul 16, 03:05 UTCJul 16, 06:05 UTC3h 0m
2026-07-15 CXI3A - Jul 15, 17:40 UTCJul 15, 21:20 UTC3h 40m
2026-07-15 CXI19GZ - Jul 15, 12:10 UTCJul 15, 16:15 UTC4h 5m
2026-07-15 CXI5RU - Jul 15, 06:35 UTCJul 15, 09:45 UTC3h 10m
2026-07-15 CXI93GA - Jul 15, 02:00 UTCJul 15, 04:30 UTC2h 30m
2026-07-14 CXI3CN HER → CGN Jul 14, 17:10 UTCJul 14, 20:20 UTC3h 10m
2026-07-14 CXI6LE CGN → HER Jul 14, 12:35 UTCJul 14, 15:10 UTC2h 35m
2026-07-14 CXI3A - Jul 14, 07:30 UTCJul 14, 10:50 UTC3h 20m
2026-07-14 CXI19GZ - Jul 14, 01:35 UTCJul 14, 05:45 UTC4h 10m
2026-07-13 CXI58QA - Jul 13, 19:40 UTCJul 13, 23:25 UTC3h 45m
2026-07-13 CXI2FA - Jul 13, 13:15 UTCJul 13, 17:35 UTC4h 20m

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

Mode-S 4D239C frequently asked

What is Mode-S code 4D239C?
4D239C is an ICAO 24-bit transponder address. Allocated to Malta. Assigned to 9H-CXF.
Where is Mode-S 4D239C registered?
Mode-S code 4D239C is allocated to Malta (MT). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 4D239C broadcasting right now?
Yes. Mode-S 4D239C is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 4D239C, octal 23221634, decimal 5,055,388.
What flights does 4D239C operate?
Mode-S 4D239C has broadcast 20 distinct callsigns, including SEJ681, SEJ630, CXI5RU, SEJ682, SEJ631.