Apparatus

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sensors Mode-S transponder

4D239D

ICAO 24-bit transponder address · allocated to Malta

Currently assigned to 9H-ZTC · AIRBUS A-321

Hex
4D239D
Octal
23221635
Decimal
5,055,389
Country
MT
Tail
9H-ZTC
Type
A321
No current signal · last broadcast 8h ago
Flights observed
71
Distinct callsigns
7
Country
MT
Last broadcast
8h ago

Last known position

Most recent position reported by Mode-S 4D239D.

Country allocation

The ICAO 24-bit address 4D239D 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 7 distinct

Callsign Airline Flights Last seen
BCS43A European Air Transport 34 2026-05-29
BCS7DP - 32 2026-05-29
BCS717P - 1 2026-05-25
BCS4127 European Air Transport 1 2026-05-08
BCS4126 European Air Transport 1 2026-05-08
BCS2882 European Air Transport 1 2026-05-12
BCS1RF - 1 2026-05-12

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-05-29 BCS43A NTE → LEJ May 29, 20:25 UTCMay 29, 22:10 UTC1h 45m
2026-05-29 BCS7DP LEJ → NTE May 29, 03:05 UTCMay 29, 04:45 UTC1h 40m
2026-05-28 BCS43A NTE → LEJ May 28, 20:15 UTCMay 28, 21:50 UTC1h 35m
2026-05-28 BCS7DP LEJ → NTE May 28, 03:10 UTCMay 28, 04:50 UTC1h 40m
2026-05-27 BCS43A NTE → LEJ May 27, 20:15 UTCMay 27, 21:50 UTC1h 35m
2026-05-27 BCS7DP LEJ → NTE May 27, 02:49 UTCMay 27, 04:30 UTC1h 40m
2026-05-26 BCS43A NTE → LEJ May 26, 20:20 UTCMay 26, 21:55 UTC1h 35m
2026-05-26 BCS7DP LEJ → NTE May 26, 02:29 UTCMay 26, 04:10 UTC1h 40m
2026-05-25 BCS717P NTE → LEJ May 25, 07:05 UTCMay 25, 08:45 UTC1h 40m
2026-05-25 BCS7DP LEJ → NTE May 25, 02:35 UTCMay 25, 04:15 UTC1h 40m
2026-05-22 BCS43A NTE → LEJ May 22, 20:10 UTCMay 22, 21:45 UTC1h 35m
2026-05-22 BCS7DP - May 22, 02:35 UTCMay 22, 04:20 UTC1h 45m
2026-05-21 BCS43A NTE → LEJ May 21, 20:20 UTCMay 21, 21:50 UTC1h 30m
2026-05-21 BCS7DP - May 21, 02:30 UTCMay 21, 04:10 UTC1h 40m
2026-05-20 BCS43A NTE → LEJ May 20, 20:15 UTCMay 20, 21:45 UTC1h 30m
2026-05-20 BCS7DP LEJ → NTE May 20, 02:40 UTCMay 20, 04:20 UTC1h 40m
2026-05-19 BCS43A NTE → LEJ May 19, 20:40 UTCMay 19, 22:10 UTC1h 30m
2026-05-19 BCS7DP LEJ → NTE May 19, 02:35 UTCMay 19, 04:15 UTC1h 40m
2026-05-18 BCS43A NTE → LEJ May 18, 20:25 UTCMay 18, 22:00 UTC1h 35m
2026-05-18 BCS7DP - May 18, 02:20 UTCMay 18, 04:05 UTC1h 45m
2026-05-15 BCS43A NTE → LEJ May 15, 20:10 UTCMay 15, 21:50 UTC1h 40m
2026-05-15 BCS7DP - May 15, 02:35 UTCMay 15, 04:10 UTC1h 35m
2026-05-13 BCS43A NTE → LEJ May 13, 20:15 UTCMay 13, 21:45 UTC1h 30m
2026-05-13 BCS7DP - May 13, 02:40 UTCMay 13, 04:25 UTC1h 45m
2026-05-12 BCS1RF DUB → LEJ May 12, 20:01 UTCMay 12, 21:40 UTC1h 40m
2026-05-12 BCS2882 LEJ → DUB May 12, 02:45 UTCMay 12, 04:30 UTC1h 45m
2026-05-11 BCS43A NTE → LEJ May 11, 20:15 UTCMay 11, 21:50 UTC1h 35m
2026-05-11 BCS7DP - May 11, 02:45 UTCMay 11, 04:25 UTC1h 40m
2026-05-08 BCS4127 LNZ → LEJ May 8, 19:40 UTCMay 8, 20:20 UTC40m
2026-05-08 BCS4126 LEJ → LNZ May 8, 03:49 UTCMay 8, 04:34 UTC45m
2026-05-07 BCS43A NTE → LEJ May 7, 20:10 UTCMay 7, 21:45 UTC1h 35m
2026-05-07 BCS7DP - May 7, 03:10 UTCMay 7, 04:50 UTC1h 40m
2026-05-06 BCS43A NTE → LEJ May 6, 20:10 UTCMay 6, 21:40 UTC1h 30m
2026-05-06 BCS7DP - May 6, 03:05 UTCMay 6, 04:45 UTC1h 40m
2026-05-05 BCS43A NTE → LEJ May 5, 20:25 UTCMay 5, 22:01 UTC1h 35m
2026-05-05 BCS7DP - May 5, 02:45 UTCMay 5, 04:30 UTC1h 45m
2026-05-04 BCS43A NTE → LEJ May 4, 20:15 UTCMay 4, 21:50 UTC1h 35m
2026-05-04 BCS7DP LEJ → NTE May 4, 02:39 UTCMay 4, 04:29 UTC1h 50m
2026-04-30 BCS43A NTE → LEJ Apr 30, 20:05 UTCApr 30, 21:45 UTC1h 40m
2026-04-30 BCS7DP - Apr 30, 02:50 UTCApr 30, 04:25 UTC1h 35m
2026-04-29 BCS43A NTE → LEJ Apr 29, 20:10 UTCApr 29, 22:00 UTC1h 50m
2026-04-29 BCS7DP - Apr 29, 02:35 UTCApr 29, 04:15 UTC1h 40m
2026-04-28 BCS43A NTE → LEJ Apr 28, 20:10 UTCApr 28, 21:45 UTC1h 35m
2026-04-28 BCS7DP - Apr 28, 02:50 UTCApr 28, 04:35 UTC1h 45m
2026-04-27 BCS43A NTE → LEJ Apr 27, 20:10 UTCApr 27, 21:40 UTC1h 30m
2026-04-27 BCS7DP - Apr 27, 02:30 UTCApr 27, 04:15 UTC1h 45m
2026-04-24 BCS43A NTE → LEJ Apr 24, 20:10 UTCApr 24, 21:50 UTC1h 40m
2026-04-24 BCS7DP LEJ → NTE Apr 24, 02:35 UTCApr 24, 04:15 UTC1h 40m
2026-04-23 BCS43A NTE → LEJ Apr 23, 20:10 UTCApr 23, 21:50 UTC1h 40m
2026-04-23 BCS7DP LEJ → NTE Apr 23, 03:05 UTCApr 23, 04:40 UTC1h 35m

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

Mode-S 4D239D frequently asked

What is Mode-S code 4D239D?
4D239D is an ICAO 24-bit transponder address. Allocated to Malta. Assigned to 9H-ZTC.
Where is Mode-S 4D239D registered?
Mode-S code 4D239D is allocated to Malta (MT). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 4D239D broadcasting right now?
No active broadcast right now. Last signal was 8h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 4D239D, octal 23221635, decimal 5,055,389.
What flights does 4D239D operate?
Mode-S 4D239D has broadcast 7 distinct callsigns, including BCS43A, BCS7DP, BCS717P, BCS4127, BCS4126.