Apparatus

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sensors Mode-S transponder

4B444F

ICAO 24-bit transponder address · allocated to Switzerland

Currently assigned to HB-ZWP · ROBINSON R-22 Mariner

Hex
4B444F
Octal
22642117
Decimal
4,932,687
Country
CH
Tail
HB-ZWP
Type
R22
No current signal · last broadcast Jul 18, 11:10 UTC
Flights observed
24
Distinct callsigns
1
Country
CH
Last broadcast
Jul 18, 11:10 UTC

Last known position

Most recent position reported by Mode-S 4B444F.

Country allocation

The ICAO 24-bit address 4B444F falls within the block assigned to Switzerland (CH) by ICAO Annex 10, Volume III. Every aircraft registered in Switzerland 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 1 distinct

Callsign Airline Flights Last seen
HBZWP - 22 2026-07-18

Recent flights last 24

DateFlightRouteTakeoffLandingDuration
2026-07-18 HBZWP - Jul 18, 09:40 UTCJul 18, 11:10 UTC1h 30m
2026-07-17 HBZWP - Jul 17, 11:00 UTCJul 17, 11:30 UTC30m
2026-07-16 HBZWP - Jul 16, 16:00 UTCJul 16, 16:49 UTC50m
2026-07-16 HBZWP - Jul 16, 14:29 UTCJul 16, 15:10 UTC40m
2026-07-15 HBZWP - Jul 15, 09:50 UTCJul 15, 10:10 UTC20m
2026-07-13 HBZWP - Jul 13, 12:25 UTCJul 13, 13:00 UTC35m
2026-07-11 HBZWP - Jul 11, 11:25 UTCJul 11, 12:20 UTC55m
2026-07-10 HBZWP - Jul 10, 07:15 UTCJul 10, 07:30 UTC15m
2026-07-10 HBZWP - Jul 10, 05:30 UTCJul 10, 06:10 UTC40m
2026-07-09 HBZWP - Jul 9, 11:35 UTCJul 9, 12:05 UTC30m
2026-07-09 - - Jul 9, 09:10 UTCJul 9, 09:20 UTC10m
2026-07-09 HBZWP - Jul 9, 07:15 UTCJul 9, 08:05 UTC50m
2026-07-08 HBZWP - Jul 8, 16:35 UTCJul 8, 17:00 UTC25m
2026-07-08 HBZWP - Jul 8, 15:10 UTCJul 8, 15:55 UTC45m
2026-07-08 HBZWP - Jul 8, 09:15 UTCJul 8, 09:35 UTC20m
2026-07-08 HBZWP - Jul 8, 07:50 UTCJul 8, 08:25 UTC35m
2026-07-07 - - Jul 7, 18:00 UTCJul 7, 18:15 UTC15m
2026-07-07 HBZWP - Jul 7, 13:40 UTCJul 7, 14:20 UTC40m
2026-07-07 HBZWP - Jul 7, 12:20 UTCJul 7, 12:50 UTC30m
2026-07-07 HBZWP - Jul 7, 11:05 UTCJul 7, 11:30 UTC25m
2026-07-07 HBZWP - Jul 7, 08:55 UTCJul 7, 09:55 UTC1h 0m
2026-07-06 HBZWP - Jul 6, 15:05 UTCJul 6, 16:20 UTC1h 15m
2026-07-06 HBZWP - Jul 6, 13:20 UTCJul 6, 13:30 UTC10m
2026-07-06 HBZWP - Jul 6, 11:05 UTCJul 6, 12:25 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 HB-ZWP page for operator, model, and routing details .

Mode-S 4B444F frequently asked

What is Mode-S code 4B444F?
4B444F is an ICAO 24-bit transponder address. Allocated to Switzerland. Assigned to HB-ZWP.
Where is Mode-S 4B444F registered?
Mode-S code 4B444F is allocated to Switzerland (CH). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 4B444F broadcasting right now?
No active broadcast right now. Last signal was Jul 18, 11:10 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 4B444F, octal 22642117, decimal 4,932,687.
What flights does 4B444F operate?
Mode-S 4B444F has broadcast 1 distinct callsign, including HBZWP.