sensors Mode-S transponder

4D201D

ICAO 24-bit transponder address · allocated to Malta

Currently assigned to 9H-AEG · AIRBUS A-319

Hex
4D201D
Octal
23220035
Decimal
5,054,493
Country
MT
Tail
9H-AEG
Type
A319
Broadcasting now · callsign WMT7UV · 38,000 ft
Flights observed
15
Distinct callsigns
11
Country
MT
Last broadcast
19h ago

Current position

4D201D is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address 4D201D 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 11 distinct

Callsign Airline Flights Last seen
WZZ664 - 2 2026-04-13
WZZ65 - 2 2026-04-13
WZZ403 - 2 2026-04-13
WMT546 - 2 2026-04-14
WZZ9BY - 1 2026-04-12
WZZ6ZB - 1 2026-04-13
WZZ522 - 1 2026-04-13
WZZ4295 - 1 2026-04-13
WZZ404 - 1 2026-04-13
WZZ2050 - 1 2026-04-13
WZZ194 - 1 2026-04-14

Recent flights last 15

DateFlightRouteTakeoffLandingDuration
2026-04-14 WMT546 - Apr 14, 09:10 UTCApr 14, 10:10 UTC1h 0m
2026-04-14 WMT546 - Apr 14, 07:30 UTCApr 14, 09:05 UTC1h 35m
2026-04-14 WZZ194 - Apr 14, 05:15 UTCApr 14, 06:00 UTC45m
2026-04-13 WZZ664 - Apr 13, 19:50 UTCApr 13, 20:45 UTC55m
2026-04-13 WZZ664 - Apr 13, 19:20 UTCApr 13, 20:10 UTC50m
2026-04-13 WZZ4295 KRK → MXP Apr 13, 16:50 UTCApr 13, 18:15 UTC1h 25m
2026-04-13 WZZ522 - Apr 13, 14:25 UTCApr 13, 15:50 UTC1h 25m
2026-04-13 WZZ65 - Apr 13, 12:20 UTCApr 13, 13:35 UTC1h 15m
2026-04-13 WZZ65 - Apr 13, 12:10 UTCApr 13, 12:15 UTC5m
2026-04-13 WZZ404 - Apr 13, 10:35 UTCApr 13, 11:25 UTC50m
2026-04-13 WZZ2050 - Apr 13, 08:20 UTCApr 13, 09:55 UTC1h 35m
2026-04-13 WZZ6ZB - Apr 13, 05:15 UTCApr 13, 07:10 UTC1h 55m
2026-04-13 WZZ403 - Apr 13, 03:55 UTCApr 13, 04:25 UTC30m
2026-04-13 WZZ403 - Apr 13, 03:35 UTCApr 13, 04:15 UTC40m
2026-04-12 WZZ9BY - Apr 12, 18:40 UTCApr 12, 20:15 UTC1h 35m

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

Mode-S 4D201D frequently asked

What is Mode-S code 4D201D?
4D201D is an ICAO 24-bit transponder address. Allocated to Malta. Assigned to 9H-AEG.
Where is Mode-S 4D201D registered?
Mode-S code 4D201D is allocated to Malta (MT). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 4D201D broadcasting right now?
Yes. Mode-S 4D201D is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 4D201D, octal 23220035, decimal 5,054,493.
What flights does 4D201D operate?
Mode-S 4D201D has broadcast 11 distinct callsigns, including WZZ664, WZZ65, WZZ403, WMT546, WZZ9BY.