Apparatus

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sensors Mode-S transponder

4D23DB

ICAO 24-bit transponder address · allocated to Malta

Currently assigned to 9H-VIL · BOMBARDIER BD-700 Global 7000/7500

Hex
4D23DB
Octal
23221733
Decimal
5,055,451
Country
MT
Tail
9H-VIL
Type
GL7T
No current signal · last broadcast 13h ago
Flights observed
9
Distinct callsigns
2
Country
MT
Last broadcast
13h ago

Last known position

Most recent position reported by Mode-S 4D23DB.

Country allocation

The ICAO 24-bit address 4D23DB 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
VJT231 - 6 2026-04-14
VJT735 - 3 2026-04-13

Recent flights last 9

DateFlightRouteTakeoffLandingDuration
2026-04-14 VJT231 - Apr 14, 09:10 UTCApr 14, 09:25 UTC15m
2026-04-14 VJT231 - Apr 14, 07:10 UTCApr 14, 09:05 UTC1h 55m
2026-04-14 VJT231 - Apr 14, 06:00 UTCApr 14, 07:10 UTC1h 10m
2026-04-13 VJT231 - Apr 13, 14:25 UTCApr 13, 15:40 UTC1h 15m
2026-04-13 VJT231 - Apr 13, 08:20 UTCApr 13, 11:30 UTC3h 10m
2026-04-13 VJT231 - Apr 13, 08:10 UTCApr 13, 11:30 UTC3h 20m
2026-04-13 VJT735 - Apr 13, 04:20 UTCApr 13, 05:35 UTC1h 15m
2026-04-13 VJT735 - Apr 13, 03:55 UTCApr 13, 05:35 UTC1h 40m
2026-04-13 VJT735 - Apr 13, 02:50 UTCApr 13, 04:15 UTC1h 25m

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

Mode-S 4D23DB frequently asked

What is Mode-S code 4D23DB?
4D23DB is an ICAO 24-bit transponder address. Allocated to Malta. Assigned to 9H-VIL.
Where is Mode-S 4D23DB registered?
Mode-S code 4D23DB is allocated to Malta (MT). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 4D23DB broadcasting right now?
No active broadcast right now. Last signal was 13h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 4D23DB, octal 23221733, decimal 5,055,451.
What flights does 4D23DB operate?
Mode-S 4D23DB has broadcast 2 distinct callsigns, including VJT231, VJT735.