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sensors Mode-S transponder

4D2129

ICAO 24-bit transponder address · allocated to Malta

Currently assigned to 9H-MSB · AIRBUS A-320

Hex
4D2129
Octal
23220451
Decimal
5,054,761
Country
MT
Tail
9H-MSB
Type
A320
No current signal · last broadcast Jul 20, 06:55 UTC
Flights observed
281
Distinct callsigns
20
Country
MT
Last broadcast
Jul 20, 06:55 UTC

Last known position

Most recent position reported by Mode-S 4D2129.

Country allocation

The ICAO 24-bit address 4D2129 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
MNS503 - 38 2026-07-11
MNS502 - 37 2026-07-11
MNS523 - 29 2026-07-13
MNS522 - 28 2026-07-13
MNS570 - 16 2026-07-17
MNS527 - 16 2026-07-19
MNS571 Ministic Air 15 2026-07-17
MNS526 - 15 2026-07-19
MNS310 - 13 2026-07-19
MNS311 - 12 2026-07-19
MNS400 - 11 2026-07-18
MNS561 Ministic Air 9 2026-06-14
MNS560 Ministic Air 9 2026-06-14
MNS401 - 9 2026-07-18
NMS310 - 2 2026-05-28
MNS505 - 2 2026-07-13
MNS504 - 2 2026-07-12
MNS406 - 2 2026-07-15
MNS313 - 2 2026-06-15
MNS312 - 2 2026-06-15

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-20 MNS524P - Jul 20, 05:45 UTCJul 20, 06:55 UTC1h 10m
2026-07-19 MNS527 MXP → MJI Jul 19, 14:10 UTCJul 19, 16:05 UTC1h 55m
2026-07-19 MNS526 - Jul 19, 10:15 UTCJul 19, 12:10 UTC1h 55m
2026-07-19 MNS310 - Jul 19, 07:45 UTCJul 19, 08:20 UTC35m
2026-07-19 MNS311 MJI → MLA Jul 19, 05:35 UTCJul 19, 06:20 UTC45m
2026-07-18 MNS401 - Jul 18, 11:15 UTCJul 18, 11:45 UTC30m
2026-07-18 MNS400 - Jul 18, 08:35 UTCJul 18, 09:05 UTC30m
2026-07-17 MNS571 MAD → MJI Jul 17, 23:45 UTCJul 18, 01:54 UTC2h 10m
2026-07-17 MNS570 - Jul 17, 19:30 UTCJul 17, 22:20 UTC2h 50m
2026-07-17 MNS509 AYT → MJI Jul 17, 01:35 UTCJul 17, 03:59 UTC2h 25m
2026-07-16 MNS508 MJI → AYT Jul 16, 22:10 UTCJul 17, 00:30 UTC2h 20m
2026-07-16 MNS310 MLA → MJI Jul 16, 17:14 UTCJul 16, 17:54 UTC40m
2026-07-16 MNS311 MJI → MLA Jul 16, 15:14 UTCJul 16, 15:55 UTC40m
2026-07-15 MNS407 - Jul 15, 21:05 UTCJul 15, 21:50 UTC45m
2026-07-15 MNS406 - Jul 15, 17:05 UTCJul 15, 17:40 UTC35m
2026-07-14 MNS310 - Jul 14, 17:20 UTCJul 14, 17:55 UTC35m
2026-07-14 MNS311 - Jul 14, 15:45 UTCJul 14, 16:20 UTC35m
2026-07-14 MNS401 - Jul 14, 13:20 UTCJul 14, 13:40 UTC20m
2026-07-14 MNS400 - Jul 14, 10:55 UTCJul 14, 11:55 UTC1h 0m
2026-07-13 MNS523 - Jul 13, 17:30 UTCJul 13, 19:00 UTC1h 30m
2026-07-13 MNS522 MJI → FCO Jul 13, 14:20 UTCJul 13, 15:50 UTC1h 30m
2026-07-13 MNS401 - Jul 13, 12:10 UTCJul 13, 12:55 UTC45m
2026-07-13 MNS400 - Jul 13, 09:50 UTCJul 13, 10:20 UTC30m
2026-07-13 MNS505 - Jul 13, 01:25 UTCJul 13, 03:40 UTC2h 15m
2026-07-12 MNS504 - Jul 12, 21:40 UTCJul 12, 23:55 UTC2h 15m
2026-07-12 MNS401 - Jul 12, 17:55 UTCJul 12, 18:40 UTC45m
2026-07-12 MNS416 - Jul 12, 15:30 UTCJul 12, 16:20 UTC50m
2026-07-12 MNS417 - Jul 12, 13:10 UTCJul 12, 14:20 UTC1h 10m
2026-07-12 MNS400 - Jul 12, 10:50 UTCJul 12, 11:45 UTC55m
2026-07-11 MNS503 - Jul 11, 20:20 UTCJul 11, 22:45 UTC2h 25m
2026-07-11 MNS502 - Jul 11, 14:15 UTCJul 11, 16:25 UTC2h 10m
2026-07-10 MNS571 MAD → MJI Jul 10, 18:00 UTCJul 10, 20:10 UTC2h 10m
2026-07-10 MNS570 MJI → MAD Jul 10, 13:25 UTCJul 10, 16:05 UTC2h 40m
2026-07-09 MNS310 MLA → MJI Jul 9, 17:10 UTCJul 9, 17:50 UTC40m
2026-07-09 MNS311 MJI → MLA Jul 9, 15:15 UTCJul 9, 15:50 UTC35m
2026-07-08 MNS503 - Jul 8, 18:15 UTCJul 8, 20:30 UTC2h 15m
2026-07-08 MNS502 - Jul 8, 14:15 UTCJul 8, 16:40 UTC2h 25m
2026-07-07 MNS503 - Jul 7, 18:10 UTCJul 7, 20:25 UTC2h 15m
2026-07-07 MNS502 - Jul 7, 14:30 UTCJul 7, 16:35 UTC2h 5m
2026-07-06 MNS503 - Jul 6, 18:20 UTCJul 6, 20:25 UTC2h 5m
2026-07-06 MNS502 - Jul 6, 14:30 UTCJul 6, 16:40 UTC2h 10m
2026-07-05 MNS527 - Jul 5, 19:15 UTCJul 5, 20:55 UTC1h 40m
2026-07-05 MNS526 - Jul 5, 10:10 UTCJul 5, 12:10 UTC2h 0m
2026-07-04 MNS123 BEN → MJI Jul 4, 19:00 UTCJul 4, 19:40 UTC40m
2026-07-04 MNS122 - Jul 4, 17:00 UTCJul 4, 17:40 UTC40m
2026-07-03 MNS571 MAD → MJI Jul 3, 18:00 UTCJul 3, 19:50 UTC1h 50m
2026-07-03 MNS570 - Jul 3, 13:50 UTCJul 3, 16:00 UTC2h 10m
2026-07-02 MNS310 - Jul 2, 17:20 UTCJul 2, 17:50 UTC30m
2026-07-02 MNS311 - Jul 2, 15:20 UTCJul 2, 15:50 UTC30m
2026-06-17 MNS523 FCO → MJI Jun 17, 10:25 UTCJun 17, 11:45 UTC1h 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-MSB page for operator, model, and routing details .

Mode-S 4D2129 frequently asked

What is Mode-S code 4D2129?
4D2129 is an ICAO 24-bit transponder address. Allocated to Malta. Assigned to 9H-MSB.
Where is Mode-S 4D2129 registered?
Mode-S code 4D2129 is allocated to Malta (MT). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 4D2129 broadcasting right now?
No active broadcast right now. Last signal was Jul 20, 06:55 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 4D2129, octal 23220451, decimal 5,054,761.
What flights does 4D2129 operate?
Mode-S 4D2129 has broadcast 20 distinct callsigns, including MNS503, MNS502, MNS523, MNS522, MNS570.