sensors Mode-S transponder

4D2304

ICAO 24-bit transponder address · allocated to Malta

Currently assigned to 9H-VUF · BOEING 737 MAX 8

Hex
4D2304
Octal
23221404
Decimal
5,055,236
Country
MT
Tail
9H-VUF
Type
B38M
No current signal · last broadcast 17h ago
Flights observed
13
Distinct callsigns
10
Country
MT
Last broadcast
17h ago

Last known position

Most recent position reported by Mode-S 4D2304.

Country allocation

The ICAO 24-bit address 4D2304 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 10 distinct

Callsign Airline Flights Last seen
RYR6RM - 2 2026-04-13
RYR445T - 2 2026-04-13
RYR20KX - 2 2026-04-14
RYR98LA - 1 2026-04-13
RYR64QE - 1 2026-04-13
RYR35TJ Ryanair 1 2026-04-14
RYR34QP - 1 2026-04-12
RYR2CF Ryanair 1 2026-04-13
RYR299H - 1 2026-04-12
RYR25XC - 1 2026-04-13

Recent flights last 13

DateFlightRouteTakeoffLandingDuration
2026-04-14 RYR20KX - Apr 14, 09:10 UTCApr 14, 10:45 UTC1h 35m
2026-04-14 RYR20KX - Apr 14, 08:30 UTCApr 14, 09:05 UTC35m
2026-04-14 RYR35TJ DUB → LBA Apr 14, 05:25 UTCApr 14, 07:10 UTC1h 45m
2026-04-13 RYR64QE - Apr 13, 19:45 UTCApr 13, 20:10 UTC25m
2026-04-13 RYR98LA BRS → BCN Apr 13, 16:45 UTCApr 13, 18:30 UTC1h 45m
2026-04-13 RYR445T - Apr 13, 15:50 UTCApr 13, 16:00 UTC10m
2026-04-13 RYR445T - Apr 13, 14:15 UTCApr 13, 16:00 UTC1h 45m
2026-04-13 RYR6RM - Apr 13, 12:20 UTCApr 13, 13:20 UTC1h 0m
2026-04-13 RYR6RM - Apr 13, 11:50 UTCApr 13, 12:15 UTC25m
2026-04-13 RYR2CF NRN → GRO Apr 13, 08:25 UTCApr 13, 10:55 UTC2h 30m
2026-04-13 RYR25XC - Apr 13, 05:05 UTCApr 13, 07:10 UTC2h 5m
2026-04-12 RYR34QP BRS → DUB Apr 12, 19:25 UTCApr 12, 20:10 UTC45m
2026-04-12 RYR299H - Apr 12, 17:15 UTCApr 12, 18:35 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-VUF page for operator, model, and routing details .

Mode-S 4D2304 frequently asked

What is Mode-S code 4D2304?
4D2304 is an ICAO 24-bit transponder address. Allocated to Malta. Assigned to 9H-VUF.
Where is Mode-S 4D2304 registered?
Mode-S code 4D2304 is allocated to Malta (MT). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 4D2304 broadcasting right now?
No active broadcast right now. Last signal was 17h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 4D2304, octal 23221404, decimal 5,055,236.
What flights does 4D2304 operate?
Mode-S 4D2304 has broadcast 10 distinct callsigns, including RYR6RM, RYR445T, RYR20KX, RYR98LA, RYR64QE.