sensors Mode-S transponder

4D204A

ICAO 24-bit transponder address · allocated to Malta

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

Hex
4D204A
Octal
23220112
Decimal
5,054,538
Country
MT
Tail
9H-WNW
Type
A21N
No current signal · last broadcast 17h ago
Flights observed
16
Distinct callsigns
9
Country
MT
Last broadcast
17h ago

Last known position

Most recent position reported by Mode-S 4D204A.

Country allocation

The ICAO 24-bit address 4D204A 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 9 distinct

Callsign Airline Flights Last seen
WZZ55 Wizz Air 5 2026-04-14
WZZ85 - 2 2026-04-13
WZZ40 - 2 2026-04-14
WZZ3CK - 2 2026-04-13
WZZ65 - 1 2026-04-12
WZZ522 - 1 2026-04-12
WZZ3WK - 1 2026-04-14
WZZ3NZ - 1 2026-04-13
WZZ3384 - 1 2026-04-13

Recent flights last 16

DateFlightRouteTakeoffLandingDuration
2026-04-14 WZZ3WK - Apr 14, 10:45 UTCApr 14, 11:05 UTC20m
2026-04-14 WZZ55 SVG → KRK Apr 14, 09:10 UTCApr 14, 09:45 UTC35m
2026-04-14 WZZ55 SVG → KRK Apr 14, 07:45 UTCApr 14, 09:05 UTC1h 20m
2026-04-14 WZZ40 - Apr 14, 05:15 UTCApr 14, 06:25 UTC1h 10m
2026-04-13 WZZ85 - Apr 13, 19:50 UTCApr 13, 21:05 UTC1h 15m
2026-04-13 WZZ85 - Apr 13, 19:25 UTCApr 13, 20:10 UTC45m
2026-04-13 WZZ3384 KRK → NCE Apr 13, 16:30 UTCApr 13, 18:25 UTC1h 55m
2026-04-13 WZZ3NZ - Apr 13, 14:00 UTCApr 13, 15:10 UTC1h 10m
2026-04-13 WZZ3CK - Apr 13, 11:55 UTCApr 13, 12:20 UTC25m
2026-04-13 WZZ3CK - Apr 13, 11:05 UTCApr 13, 12:15 UTC1h 10m
2026-04-13 WZZ55 SVG → KRK Apr 13, 08:20 UTCApr 13, 09:35 UTC1h 15m
2026-04-13 WZZ55 SVG → KRK Apr 13, 07:55 UTCApr 13, 09:35 UTC1h 40m
2026-04-13 WZZ55 SVG → KRK Apr 13, 07:35 UTCApr 13, 08:15 UTC40m
2026-04-13 WZZ40 - Apr 13, 04:20 UTCApr 13, 06:30 UTC2h 10m
2026-04-12 WZZ522 - Apr 12, 18:55 UTCApr 12, 20:15 UTC1h 20m
2026-04-12 WZZ65 - Apr 12, 17:15 UTCApr 12, 18:05 UTC50m

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

Mode-S 4D204A frequently asked

What is Mode-S code 4D204A?
4D204A is an ICAO 24-bit transponder address. Allocated to Malta. Assigned to 9H-WNW.
Where is Mode-S 4D204A registered?
Mode-S code 4D204A is allocated to Malta (MT). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 4D204A 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 4D204A, octal 23220112, decimal 5,054,538.
What flights does 4D204A operate?
Mode-S 4D204A has broadcast 9 distinct callsigns, including WZZ55, WZZ85, WZZ40, WZZ3CK, WZZ65.