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 43m ago
Flights observed
134
Distinct callsigns
12
Country
MT
Last broadcast
43m 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 12 distinct

Callsign Airline Flights Last seen
BCS43A - 60 2026-07-13
BCS7DP - 59 2026-07-14
BCS4127 - 3 2026-06-16
BCS4126 European Air Transport 3 2026-06-16
BCS1RF - 2 2026-07-06
BCS717P - 1 2026-05-25
BCS702P European Air Transport 1 2026-07-14
BCS5QC - 1 2026-07-05
BCS3845 European Air Transport 1 2026-06-17
BCS3844 - 1 2026-06-17
BCS2882 European Air Transport 1 2026-05-12
BCS1507 - 1 2026-07-04

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 BCS702P BTS → LEJ Jul 14, 07:55 UTCJul 14, 09:15 UTC1h 20m
2026-07-14 BCS7DP - Jul 14, 02:30 UTCJul 14, 04:20 UTC1h 50m
2026-07-13 BCS43A - Jul 13, 20:15 UTCJul 13, 21:40 UTC1h 25m
2026-07-13 BCS7DP LEJ → NTE Jul 13, 02:25 UTCJul 13, 04:10 UTC1h 45m
2026-07-10 BCS43A - Jul 10, 20:15 UTCJul 10, 21:45 UTC1h 30m
2026-07-10 BCS7DP - Jul 10, 02:40 UTCJul 10, 04:20 UTC1h 40m
2026-07-09 BCS43A - Jul 9, 20:10 UTCJul 9, 21:45 UTC1h 35m
2026-07-09 BCS7DP - Jul 9, 02:45 UTCJul 9, 04:20 UTC1h 35m
2026-07-08 BCS43A - Jul 8, 20:10 UTCJul 8, 21:50 UTC1h 40m
2026-07-08 BCS7DP - Jul 8, 02:35 UTCJul 8, 04:10 UTC1h 35m
2026-07-07 BCS43A - Jul 7, 20:20 UTCJul 7, 21:55 UTC1h 35m
2026-07-07 BCS7DP LEJ → NTE Jul 7, 02:50 UTCJul 7, 04:30 UTC1h 40m
2026-07-06 BCS1RF DUB → LEJ Jul 6, 20:05 UTCJul 6, 21:45 UTC1h 40m
2026-07-05 BCS5QC LEJ → DUB Jul 5, 23:00 UTCJul 6, 00:55 UTC1h 55m
2026-07-04 BCS1507 - Jul 4, 19:30 UTCJul 4, 21:00 UTC1h 30m
2026-07-03 BCS43A - Jul 3, 20:15 UTCJul 3, 21:20 UTC1h 5m
2026-07-03 BCS7DP LEJ → NTE Jul 3, 02:50 UTCJul 3, 04:35 UTC1h 45m
2026-07-02 BCS43A - Jul 2, 20:15 UTCJul 2, 21:45 UTC1h 30m
2026-07-02 BCS7DP LEJ → NTE Jul 2, 02:55 UTCJul 2, 04:30 UTC1h 35m
2026-06-30 BCS43A - Jun 30, 20:15 UTCJun 30, 21:40 UTC1h 25m
2026-06-30 BCS7DP - Jun 30, 02:55 UTCJun 30, 04:45 UTC1h 50m
2026-06-29 BCS43A - Jun 29, 20:15 UTCJun 29, 21:50 UTC1h 35m
2026-06-29 BCS7DP - Jun 29, 03:20 UTCJun 29, 05:00 UTC1h 40m
2026-06-26 BCS43A - Jun 26, 20:15 UTCJun 26, 21:55 UTC1h 40m
2026-06-26 BCS7DP LEJ → NTE Jun 26, 02:44 UTCJun 26, 04:20 UTC1h 35m
2026-06-25 BCS43A - Jun 25, 20:09 UTCJun 25, 21:44 UTC1h 35m
2026-06-25 BCS7DP LEJ → NTE Jun 25, 02:45 UTCJun 25, 04:25 UTC1h 40m
2026-06-24 BCS43A - Jun 24, 20:14 UTCJun 24, 21:50 UTC1h 35m
2026-06-24 BCS7DP LEJ → NTE Jun 24, 02:34 UTCJun 24, 04:10 UTC1h 35m
2026-06-23 BCS43A - Jun 23, 20:10 UTCJun 23, 21:45 UTC1h 35m
2026-06-23 BCS7DP - Jun 23, 02:29 UTCJun 23, 04:14 UTC1h 45m
2026-06-22 BCS43A - Jun 22, 20:14 UTCJun 22, 21:45 UTC1h 30m
2026-06-22 BCS7DP LEJ → NTE Jun 22, 02:50 UTCJun 22, 04:30 UTC1h 40m
2026-06-19 BCS43A - Jun 19, 20:34 UTCJun 19, 22:19 UTC1h 45m
2026-06-19 BCS7DP - Jun 19, 02:35 UTCJun 19, 04:14 UTC1h 40m
2026-06-18 BCS43A - Jun 18, 20:20 UTCJun 18, 21:55 UTC1h 35m
2026-06-18 BCS7DP LEJ → NTE Jun 18, 02:40 UTCJun 18, 04:25 UTC1h 45m
2026-06-17 BCS3845 BLL → LEJ Jun 17, 20:25 UTCJun 17, 21:20 UTC55m
2026-06-17 BCS3844 LEJ → BLL Jun 17, 03:35 UTCJun 17, 04:25 UTC50m
2026-06-16 BCS4127 - Jun 16, 19:55 UTCJun 16, 20:40 UTC45m
2026-06-16 BCS4126 LEJ → LNZ Jun 16, 03:30 UTCJun 16, 04:15 UTC45m
2026-06-15 BCS4127 - Jun 15, 19:50 UTCJun 15, 20:34 UTC45m
2026-06-14 BCS4126 LEJ → LNZ Jun 14, 20:05 UTCJun 14, 20:45 UTC40m
2026-06-12 BCS43A - Jun 12, 20:15 UTCJun 12, 21:55 UTC1h 40m
2026-06-12 BCS7DP LEJ → NTE Jun 12, 02:45 UTCJun 12, 04:20 UTC1h 35m
2026-06-11 BCS43A NTE → LEJ Jun 11, 20:15 UTCJun 11, 21:50 UTC1h 35m
2026-06-11 BCS7DP LEJ → NTE Jun 11, 02:50 UTCJun 11, 04:30 UTC1h 40m
2026-06-10 BCS43A NTE → LEJ Jun 10, 20:10 UTCJun 10, 21:40 UTC1h 30m
2026-06-10 BCS7DP - Jun 10, 02:30 UTCJun 10, 04:20 UTC1h 50m
2026-06-09 BCS43A NTE → LEJ Jun 9, 20:10 UTCJun 9, 21:40 UTC1h 30m

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 43m 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 12 distinct callsigns, including BCS43A, BCS7DP, BCS4127, BCS4126, BCS1RF.