sensors Mode-S transponder

4D204B

ICAO 24-bit transponder address · allocated to Malta

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

Hex
4D204B
Octal
23220113
Decimal
5,054,539
Country
MT
Tail
9H-WNX
Type
A21N
Broadcasting now · callsign WZZ8PV · 31,275 ft
Flights observed
16
Distinct callsigns
10
Country
MT
Last broadcast
18h ago

Current position

4D204B is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address 4D204B 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
WZZ99WA - 2 2026-04-13
WMT8064 - 2 2026-04-13
WMT7DL - 2 2026-04-13
WMT796 - 2 2026-04-13
WMT3YZ - 2 2026-04-13
WMT3066 - 2 2026-04-14
WZZ55KB - 1 2026-04-12
WZZ3357 - 1 2026-04-12
WMT7237 - 1 2026-04-13
WMT1280 - 1 2026-04-14

Recent flights last 16

DateFlightRouteTakeoffLandingDuration
2026-04-14 WMT3066 - Apr 14, 09:10 UTCApr 14, 09:45 UTC35m
2026-04-14 WMT3066 - Apr 14, 08:05 UTCApr 14, 09:05 UTC1h 0m
2026-04-14 WMT1280 - Apr 14, 05:15 UTCApr 14, 06:55 UTC1h 40m
2026-04-13 WMT3YZ - Apr 13, 19:50 UTCApr 13, 21:00 UTC1h 10m
2026-04-13 WMT3YZ - Apr 13, 19:40 UTCApr 13, 20:10 UTC30m
2026-04-13 WMT7DL - Apr 13, 17:20 UTCApr 13, 18:30 UTC1h 10m
2026-04-13 WMT7DL MXP → MXP Apr 13, 17:05 UTCApr 13, 17:10 UTC5m
2026-04-13 WMT8064 - Apr 13, 15:50 UTCApr 13, 16:05 UTC15m
2026-04-13 WMT8064 - Apr 13, 14:30 UTCApr 13, 16:05 UTC1h 35m
2026-04-13 WMT796 - Apr 13, 12:20 UTCApr 13, 13:15 UTC55m
2026-04-13 WMT796 - Apr 13, 11:45 UTCApr 13, 12:15 UTC30m
2026-04-13 WMT7237 - Apr 13, 08:45 UTCApr 13, 10:25 UTC1h 40m
2026-04-13 WZZ99WA - Apr 13, 04:20 UTCApr 13, 07:05 UTC2h 45m
2026-04-13 WZZ99WA - Apr 13, 03:55 UTCApr 13, 04:15 UTC20m
2026-04-12 WZZ3357 - Apr 12, 19:50 UTCApr 12, 20:15 UTC25m
2026-04-12 WZZ55KB - Apr 12, 17:15 UTCApr 12, 18:25 UTC1h 10m

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

Mode-S 4D204B frequently asked

What is Mode-S code 4D204B?
4D204B is an ICAO 24-bit transponder address. Allocated to Malta. Assigned to 9H-WNX.
Where is Mode-S 4D204B registered?
Mode-S code 4D204B is allocated to Malta (MT). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 4D204B broadcasting right now?
Yes. Mode-S 4D204B is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 4D204B, octal 23220113, decimal 5,054,539.
What flights does 4D204B operate?
Mode-S 4D204B has broadcast 10 distinct callsigns, including WZZ99WA, WMT8064, WMT7DL, WMT796, WMT3YZ.