Apparatus

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sensors Mode-S transponder

4D20BC

ICAO 24-bit transponder address · allocated to Malta

Currently assigned to 9H-WMH · AIRBUS A-321neo

Hex
4D20BC
Octal
23220274
Decimal
5,054,652
Country
MT
Tail
9H-WMH
Type
A21N
Broadcasting now · callsign WMT2322 · 33,975 ft
Flights observed
607
Distinct callsigns
20
Country
MT
Last broadcast
Jul 26, 15:30 UTC

Current position

4D20BC is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address 4D20BC 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
WMT8151 - 7 2026-07-15
WMT3358 - 7 2026-07-26
WMT8064 - 6 2026-06-05
WMT6JU - 6 2026-07-15
WMT454 - 6 2026-07-17
WMT3MA - 6 2026-07-17
WMT3630 - 6 2026-07-26
WZZ9UF - 5 2026-06-24
WZZ513 - 5 2026-06-24
WZZ4BK Wizz Air 5 2026-04-18
WMT9SX - 5 2026-07-15
WMT7GM Wizz Air Malta 5 2026-06-07
WMT5PL - 5 2026-05-26
WMT1334 - 5 2026-06-07
WZZ6QU Wizz Air 4 2026-06-25
WZZ1EB - 4 2026-06-25
WMT8LM - 4 2026-07-23
WMT892 - 4 2026-06-06
WMT7PC - 4 2026-05-09
WMT7DL - 4 2026-07-10

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 WMT3358 LMP → MXP Jul 26, 13:45 UTCJul 26, 15:25 UTC1h 40m
2026-07-26 WMT3630 MXP → LMP Jul 26, 11:05 UTCJul 26, 12:55 UTC1h 50m
2026-07-26 WMT3066 WAW → MXP Jul 26, 08:00 UTCJul 26, 09:45 UTC1h 45m
2026-07-26 WMT1280 MXP → WAW Jul 26, 04:55 UTCJul 26, 06:30 UTC1h 35m
2026-07-25 WMT42LP - Jul 25, 22:25 UTCJul 26, 00:00 UTC1h 35m
2026-07-25 WMT10TA - Jul 25, 19:55 UTCJul 25, 21:15 UTC1h 20m
2026-07-25 WMT1SU AGP → MXP Jul 25, 16:45 UTCJul 25, 18:35 UTC1h 50m
2026-07-25 WMT5EF - Jul 25, 12:50 UTCJul 25, 15:20 UTC2h 30m
2026-07-25 WMT132 - Jul 25, 09:55 UTCJul 25, 10:50 UTC55m
2026-07-25 WMT1097 - Jul 25, 08:15 UTCJul 25, 08:45 UTC30m
2026-07-25 WMT642 IAS → LPL Jul 25, 06:35 UTCJul 25, 07:05 UTC30m
2026-07-25 WMT2328 - Jul 25, 04:35 UTCJul 25, 05:30 UTC55m
2026-07-24 WMT4JM - Jul 24, 21:50 UTCJul 24, 23:10 UTC1h 20m
2026-07-24 WMT8598 - Jul 24, 18:55 UTCJul 24, 20:05 UTC1h 10m
2026-07-24 WMT3PH - Jul 24, 16:10 UTCJul 24, 17:25 UTC1h 15m
2026-07-24 WMT9602 - Jul 24, 12:45 UTCJul 24, 14:35 UTC1h 50m
2026-07-24 WMT68LU - Jul 24, 08:40 UTCJul 24, 10:45 UTC2h 5m
2026-07-24 WMT1BH - Jul 24, 05:10 UTCJul 24, 07:30 UTC2h 20m
2026-07-23 WMT303 SVQ → FCO Jul 23, 20:05 UTCJul 23, 22:10 UTC2h 5m
2026-07-23 WMT8LM - Jul 23, 16:40 UTCJul 23, 19:05 UTC2h 25m
2026-07-23 WMT387 - Jul 23, 13:15 UTCJul 23, 15:15 UTC2h 0m
2026-07-23 WMT5JY - Jul 23, 10:20 UTCJul 23, 12:05 UTC1h 45m
2026-07-23 WMT9089 - Jul 23, 06:15 UTCJul 23, 07:40 UTC1h 25m
2026-07-23 WMT8812 - Jul 23, 03:40 UTCJul 23, 05:10 UTC1h 30m
2026-07-22 WMT797 - Jul 22, 19:45 UTCJul 22, 22:35 UTC2h 50m
2026-07-22 WMT2WZ - Jul 22, 18:30 UTCJul 22, 18:35 UTC5m
2026-07-22 WMT2WZ - Jul 22, 15:45 UTCJul 22, 17:30 UTC1h 45m
2026-07-22 WMT4180 - Jul 22, 12:35 UTCJul 22, 14:05 UTC1h 30m
2026-07-22 WMT6191 - Jul 22, 11:10 UTCJul 22, 11:35 UTC25m
2026-07-22 WMT1AC TLV → FCO Jul 22, 04:20 UTCJul 22, 05:25 UTC1h 5m
2026-07-21 WMT1488 IBZ → FCO Jul 21, 21:15 UTCJul 21, 22:35 UTC1h 20m
2026-07-21 WMT8077 - Jul 21, 18:40 UTCJul 21, 20:15 UTC1h 35m
2026-07-21 WMT6CS - Jul 21, 15:45 UTCJul 21, 16:50 UTC1h 5m
2026-07-21 WMT7VK - Jul 21, 13:00 UTCJul 21, 13:55 UTC55m
2026-07-21 WMT4GH - Jul 21, 08:20 UTCJul 21, 11:30 UTC3h 10m
2026-07-21 WMT7705 - Jul 21, 04:00 UTCJul 21, 06:55 UTC2h 55m
2026-07-20 WMT2257 MAD → FCO Jul 20, 20:00 UTCJul 20, 21:45 UTC1h 45m
2026-07-20 WMT1ZY - Jul 20, 16:25 UTCJul 20, 18:35 UTC2h 10m
2026-07-20 WMT463 ORY → FCO Jul 20, 13:25 UTCJul 20, 14:55 UTC1h 30m
2026-07-20 WMT4DW - Jul 20, 10:30 UTCJul 20, 12:15 UTC1h 45m
2026-07-20 WMT1RV CHQ → FCO Jul 20, 06:55 UTCJul 20, 09:00 UTC2h 5m
2026-07-20 WMT4078 - Jul 20, 04:15 UTCJul 20, 06:00 UTC1h 45m
2026-07-19 WMT715 - Jul 19, 19:55 UTCJul 19, 21:55 UTC2h 0m
2026-07-19 WMT2NS - Jul 19, 17:00 UTCJul 19, 19:00 UTC2h 0m
2026-07-19 WMT8RE - Jul 19, 13:00 UTCJul 19, 14:35 UTC1h 35m
2026-07-19 WMT8636 DTM → OMR Jul 19, 10:30 UTCJul 19, 12:10 UTC1h 40m
2026-07-19 WMT5310 - Jul 19, 07:10 UTCJul 19, 08:55 UTC1h 45m
2026-07-19 WMT4401 - Jul 19, 04:50 UTCJul 19, 06:25 UTC1h 35m
2026-07-18 WMT9CX - Jul 18, 20:45 UTCJul 18, 22:35 UTC1h 50m
2026-07-18 WMT6UP - Jul 18, 18:15 UTCJul 18, 20:00 UTC1h 45m

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

Mode-S 4D20BC frequently asked

What is Mode-S code 4D20BC?
4D20BC is an ICAO 24-bit transponder address. Allocated to Malta. Assigned to 9H-WMH.
Where is Mode-S 4D20BC registered?
Mode-S code 4D20BC is allocated to Malta (MT). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 4D20BC broadcasting right now?
Yes. Mode-S 4D20BC is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 4D20BC, octal 23220274, decimal 5,054,652.
What flights does 4D20BC operate?
Mode-S 4D20BC has broadcast 20 distinct callsigns, including WMT8151, WMT3358, WMT8064, WMT6JU, WMT454.