Apparatus

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sensors Mode-S transponder

4D20FB

ICAO 24-bit transponder address · allocated to Malta

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

Hex
4D20FB
Octal
23220373
Decimal
5,054,715
Country
MT
Tail
9H-WMP
Type
A21N
Broadcasting now · callsign WMT4WZ · 35,000 ft
Flights observed
575
Distinct callsigns
20
Country
MT
Last broadcast
Jul 26, 20:40 UTC

Current position

4D20FB is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address 4D20FB 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 20 distinct

Callsign Airline Flights Last seen
WZZ4742 Wizz Air 12 2026-04-27
WMT9KP - 11 2026-05-28
WMT7LN - 11 2026-05-26
WMT63CN - 11 2026-05-28
WMT434 - 11 2026-05-28
WZZ67JR Wizz Air 8 2026-04-27
WZZ58WN Wizz Air 8 2026-04-27
WZZ4QS Wizz Air 8 2026-04-27
WZZ30DY Wizz Air 8 2026-04-27
WMT935 Wizz Air Malta 8 2026-05-26
WMT57WN - 8 2026-05-26
WZZ94EJ Wizz Air 7 2026-04-27
WZZ1TU Wizz Air 7 2026-04-28
WZZ1070 - 7 2026-04-28
WMT2WY Wizz Air Malta 7 2026-05-23
WZZ91VH Wizz Air 6 2026-04-28
WZZ9073 - 4 2026-06-04
WZZ8046 - 4 2026-05-15
WZZ2775 - 4 2026-05-29
WMT956 - 4 2026-07-13

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 WZZ3DK DTM → TGD Jul 26, 19:15 UTCJul 26, 20:40 UTC1h 25m
2026-07-26 WZZ4NM - Jul 26, 16:15 UTCJul 26, 18:00 UTC1h 45m
2026-07-26 WZZ948 VIE → VLC Jul 26, 13:45 UTCJul 26, 14:50 UTC1h 5m
2026-07-26 WZZ5LT BVA → TGD Jul 26, 07:55 UTCJul 26, 12:40 UTC4h 45m
2026-07-26 WZZ4450 - Jul 26, 04:40 UTCJul 26, 06:45 UTC2h 6m
2026-07-25 WZZ8809 - Jul 25, 21:20 UTCJul 25, 22:55 UTC1h 35m
2026-07-25 WZZ239 - Jul 25, 18:15 UTCJul 25, 19:55 UTC1h 40m
2026-07-25 WZZ2QY - Jul 25, 16:10 UTCJul 25, 16:50 UTC40m
2026-07-25 WZZ8WB - Jul 25, 14:35 UTCJul 25, 15:15 UTC40m
2026-07-25 WZZ188 VIE → BCN Jul 25, 12:20 UTCJul 25, 13:10 UTC50m
2026-07-25 WZZ5061 - Jul 25, 09:40 UTCJul 25, 10:40 UTC1h 0m
2026-07-25 WZZ3074 - Jul 25, 06:50 UTCJul 25, 08:10 UTC1h 20m
2026-07-25 WZZ1738 AGP → CLJ Jul 25, 04:25 UTCJul 25, 06:00 UTC1h 35m
2026-07-24 WZZ1802 LTN → WRO Jul 24, 20:45 UTCJul 24, 22:20 UTC1h 35m
2026-07-24 WZZ2QN TGD → MMX Jul 24, 17:30 UTCJul 24, 19:40 UTC2h 10m
2026-07-24 WZZ5LT BVA → TGD Jul 24, 14:20 UTCJul 24, 16:05 UTC1h 45m
2026-07-24 WZZ4450 - Jul 24, 11:05 UTCJul 24, 13:15 UTC2h 10m
2026-07-24 WZZ3DK DTM → TGD Jul 24, 07:40 UTCJul 24, 09:10 UTC1h 30m
2026-07-24 WZZ4NM - Jul 24, 04:15 UTCJul 24, 06:10 UTC1h 55m
2026-07-23 WZZ5189 - Jul 23, 19:50 UTCJul 23, 21:25 UTC1h 35m
2026-07-23 WZZ8KG - Jul 23, 16:55 UTCJul 23, 18:50 UTC1h 55m
2026-07-23 WZZ948 VIE → VLC Jul 23, 14:30 UTCJul 23, 15:35 UTC1h 5m
2026-07-23 WZZ533 CRL → OTP Jul 23, 12:05 UTCJul 23, 13:30 UTC1h 25m
2026-07-23 WZZ9369 - Jul 23, 08:35 UTCJul 23, 10:15 UTC1h 40m
2026-07-23 WZZ8113 - Jul 23, 05:20 UTCJul 23, 07:20 UTC2h 0m
2026-07-23 WZZ401 AMM → TIA Jul 23, 03:20 UTCJul 23, 04:05 UTC45m
2026-07-22 WMT1488 IBZ → FCO Jul 22, 21:55 UTCJul 22, 23:15 UTC1h 20m
2026-07-22 WMT8077 - Jul 22, 19:15 UTCJul 22, 20:50 UTC1h 35m
2026-07-22 WMT5682 LMP → FCO Jul 22, 16:45 UTCJul 22, 17:55 UTC1h 10m
2026-07-22 WMT499 DTM → OTP Jul 22, 14:45 UTCJul 22, 15:50 UTC1h 5m
2026-07-22 WMT5EY - Jul 22, 04:45 UTCJul 22, 13:10 UTC8h 25m
2026-07-21 WMT878 FMM → OHD Jul 21, 21:35 UTCJul 21, 23:35 UTC2h 0m
2026-07-21 WMT4SG - Jul 21, 19:00 UTCJul 21, 20:35 UTC1h 35m
2026-07-21 WMT2283 - Jul 21, 16:00 UTCJul 21, 17:30 UTC1h 30m
2026-07-21 WMT271 MXP → ALC Jul 21, 12:40 UTCJul 21, 14:35 UTC1h 55m
2026-07-21 WMT132 OLB → MXP Jul 21, 09:55 UTCJul 21, 10:50 UTC55m
2026-07-21 WMT1097 - Jul 21, 08:15 UTCJul 21, 08:50 UTC35m
2026-07-21 WMT642 OLB → CIA Jul 21, 06:45 UTCJul 21, 07:15 UTC30m
2026-07-21 WMT2328 - Jul 21, 04:35 UTCJul 21, 05:25 UTC50m
2026-07-20 WMT3YZ - Jul 20, 20:35 UTCJul 20, 22:00 UTC1h 25m
2026-07-20 WMT7DL - Jul 20, 18:10 UTCJul 20, 19:20 UTC1h 10m
2026-07-20 WMT1RB - Jul 20, 14:25 UTCJul 20, 16:50 UTC2h 25m
2026-07-20 WMT8HM - Jul 20, 10:50 UTCJul 20, 12:55 UTC2h 5m
2026-07-20 WMT1717 - Jul 20, 07:25 UTCJul 20, 09:10 UTC1h 45m
2026-07-20 WMT6JU - Jul 20, 03:25 UTCJul 20, 05:10 UTC1h 45m
2026-07-19 WMT7359 - Jul 19, 21:25 UTCJul 19, 23:00 UTC1h 35m
2026-07-19 WMT958 - Jul 19, 19:05 UTCJul 19, 20:00 UTC55m
2026-07-19 WMT958 - Jul 19, 18:05 UTCJul 19, 19:00 UTC55m
2026-07-19 WMT4HK - Jul 19, 15:10 UTCJul 19, 16:45 UTC1h 35m
2026-07-19 WMT3ZD - Jul 19, 12:35 UTCJul 19, 13:50 UTC1h 15m

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

Mode-S 4D20FB frequently asked

What is Mode-S code 4D20FB?
4D20FB is an ICAO 24-bit transponder address. Allocated to Malta. Assigned to 9H-WMP.
Where is Mode-S 4D20FB registered?
Mode-S code 4D20FB is allocated to Malta (MT). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 4D20FB broadcasting right now?
Yes. Mode-S 4D20FB is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 4D20FB, octal 23220373, decimal 5,054,715.
What flights does 4D20FB operate?
Mode-S 4D20FB has broadcast 20 distinct callsigns, including WZZ4742, WMT9KP, WMT7LN, WMT63CN, WMT434.