Apparatus

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sensors Mode-S transponder

4D20D9

ICAO 24-bit transponder address · allocated to Malta

Currently assigned to 9H-VCC · BOMBARDIER BD-100 Challenger 350

Hex
4D20D9
Octal
23220331
Decimal
5,054,681
Country
MT
Tail
9H-VCC
Type
CL35
Broadcasting now · callsign VJT426 · 3,650 ft
Flights observed
173
Distinct callsigns
2
Country
MT
Last broadcast
7d ago

Current position

4D20D9 is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address 4D20D9 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 2 distinct

Callsign Airline Flights Last seen
VJT426 - 170 2026-07-26
VJT920W - 2 2026-05-31

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 VJT426 - Jul 26, 18:05 UTCJul 26, 19:15 UTC1h 10m
2026-07-26 VJT426 - Jul 26, 16:20 UTCJul 26, 17:15 UTC55m
2026-07-26 VJT426 - Jul 26, 12:15 UTCJul 26, 13:00 UTC45m
2026-07-26 VJT426 LIN → FLR Jul 26, 10:20 UTCJul 26, 11:05 UTC45m
2026-07-25 VJT426 FAB → LIN Jul 25, 17:10 UTCJul 25, 18:40 UTC1h 30m
2026-07-25 VJT426 - Jul 25, 11:15 UTCJul 25, 12:50 UTC1h 35m
2026-07-23 VJT426 GVA → MUC Jul 23, 15:15 UTCJul 23, 16:10 UTC55m
2026-07-23 VJT426 MST → GVA Jul 23, 13:05 UTCJul 23, 13:55 UTC50m
2026-07-23 VJT426 - Jul 23, 10:15 UTCJul 23, 11:50 UTC1h 35m
2026-07-23 VJT426 - Jul 23, 07:00 UTCJul 23, 07:20 UTC20m
2026-07-23 VJT426 - Jul 23, 05:10 UTCJul 23, 05:30 UTC20m
2026-07-19 VJT426 - Jul 19, 10:20 UTCJul 19, 10:45 UTC25m
2026-07-17 VJT426 - Jul 17, 15:25 UTCJul 17, 15:40 UTC15m
2026-07-17 VJT426 ZRH → EFL Jul 17, 12:40 UTCJul 17, 14:30 UTC1h 50m
2026-07-16 VJT426 EDI → ZRH Jul 16, 14:05 UTCJul 16, 16:00 UTC1h 55m
2026-07-16 VJT426 - Jul 16, 08:50 UTCJul 16, 10:10 UTC1h 20m
2026-07-16 VJT426 - Jul 16, 06:20 UTCJul 16, 07:35 UTC1h 15m
2026-07-15 VJT426 PEG → BLQ Jul 15, 17:55 UTCJul 15, 18:25 UTC30m
2026-07-15 VJT426 LIN → PEG Jul 15, 15:30 UTCJul 15, 16:15 UTC45m
2026-07-14 VJT426 NCE → LIN Jul 14, 17:20 UTCJul 14, 18:45 UTC1h 25m
2026-07-14 VJT426 - Jul 14, 13:10 UTCJul 14, 14:50 UTC1h 40m
2026-07-14 VJT426 NWI → FAB Jul 14, 09:45 UTCJul 14, 10:20 UTC35m
2026-07-14 VJT426 - Jul 14, 07:30 UTCJul 14, 08:45 UTC1h 15m
2026-07-14 VJT426 - Jul 14, 05:50 UTCJul 14, 07:25 UTC1h 35m
2026-07-14 VJT426 - Jul 14, 01:35 UTCJul 14, 04:00 UTC2h 25m
2026-07-12 VJT426 - Jul 12, 16:01 UTCJul 12, 19:15 UTC3h 15m
2026-07-12 VJT426 ATH → EFL Jul 12, 14:20 UTCJul 12, 15:15 UTC55m
2026-07-12 VJT426 - Jul 12, 09:55 UTCJul 12, 13:01 UTC3h 5m
2026-07-11 VJT426 - Jul 11, 17:30 UTCJul 11, 18:35 UTC1h 5m
2026-07-11 VJT426 AMS → IBZ Jul 11, 14:30 UTCJul 11, 16:40 UTC2h 10m
2026-07-11 VJT426 - Jul 11, 10:00 UTCJul 11, 11:10 UTC1h 10m
2026-07-11 VJT426 - Jul 11, 08:15 UTCJul 11, 09:00 UTC45m
2026-07-10 VJT426 - Jul 10, 18:30 UTCJul 10, 18:45 UTC15m
2026-07-10 VJT426 - Jul 10, 16:05 UTCJul 10, 17:40 UTC1h 35m
2026-07-10 VJT426 - Jul 10, 12:40 UTCJul 10, 13:05 UTC25m
2026-07-09 VJT426 INN → FAB Jul 9, 16:10 UTCJul 9, 17:50 UTC1h 40m
2026-07-09 VJT426 - Jul 9, 13:00 UTCJul 9, 14:25 UTC1h 25m
2026-07-09 VJT426 - Jul 9, 08:50 UTCJul 9, 11:40 UTC2h 50m
2026-07-08 VJT426 VLC → CMN Jul 8, 16:05 UTCJul 8, 17:30 UTC1h 25m
2026-07-07 VJT426 IBZ → VLC Jul 7, 20:40 UTCJul 7, 21:10 UTC30m
2026-07-07 VJT426 - Jul 7, 18:20 UTCJul 7, 19:45 UTC1h 25m
2026-07-07 VJT426 IBZ → OPO Jul 7, 16:10 UTCJul 7, 17:30 UTC1h 20m
2026-07-07 VJT426 DUS → IBZ Jul 7, 10:00 UTCJul 7, 12:00 UTC2h 0m
2026-07-06 VJT426 - Jul 6, 09:15 UTCJul 6, 10:05 UTC50m
2026-07-06 VJT426 MST → NHT Jul 6, 07:15 UTCJul 6, 08:15 UTC1h 0m
2026-07-06 VJT426 - Jul 6, 05:05 UTCJul 6, 06:00 UTC55m
2026-07-05 VJT426 NUE → ACH Jul 5, 14:55 UTCJul 5, 15:35 UTC40m
2026-07-05 VJT426 - Jul 5, 13:00 UTCJul 5, 13:25 UTC25m
2026-07-05 VJT426 - Jul 5, 10:15 UTCJul 5, 11:40 UTC1h 25m
2026-07-05 VJT426 - Jul 5, 07:45 UTCJul 5, 08:45 UTC1h 0m

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

Mode-S 4D20D9 frequently asked

What is Mode-S code 4D20D9?
4D20D9 is an ICAO 24-bit transponder address. Allocated to Malta. Assigned to 9H-VCC.
Where is Mode-S 4D20D9 registered?
Mode-S code 4D20D9 is allocated to Malta (MT). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 4D20D9 broadcasting right now?
Yes. Mode-S 4D20D9 is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 4D20D9, octal 23220331, decimal 5,054,681.
What flights does 4D20D9 operate?
Mode-S 4D20D9 has broadcast 2 distinct callsigns, including VJT426, VJT920W.