Apparatus

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sensors Mode-S transponder

4B3F28

ICAO 24-bit transponder address · allocated to Switzerland

Currently assigned to HB-XXW

Hex
4B3F28
Octal
22637450
Decimal
4,931,368
Country
CH
Tail
HB-XXW
Type
AS50
No current signal · last broadcast Jul 24, 17:15 UTC
Flights observed
230
Distinct callsigns
1
Country
CH
Last broadcast
Jul 24, 17:15 UTC

Last known position

Most recent position reported by Mode-S 4B3F28.

Country allocation

The ICAO 24-bit address 4B3F28 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
HBXXW - 230 2026-07-24

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-24 HBXXW - Jul 24, 16:55 UTCJul 24, 17:15 UTC20m
2026-07-24 HBXXW - Jul 24, 15:00 UTCJul 24, 15:10 UTC10m
2026-07-24 HBXXW - Jul 24, 11:35 UTCJul 24, 12:40 UTC1h 5m
2026-07-24 HBXXW - Jul 24, 08:55 UTCJul 24, 09:35 UTC40m
2026-07-24 HBXXW - Jul 24, 06:10 UTCJul 24, 07:00 UTC50m
2026-07-23 HBXXW - Jul 23, 13:00 UTCJul 23, 13:20 UTC20m
2026-07-23 HBXXW - Jul 23, 08:15 UTCJul 23, 09:00 UTC45m
2026-07-23 HBXXW - Jul 23, 06:10 UTCJul 23, 07:35 UTC1h 25m
2026-07-22 HBXXW - Jul 22, 15:00 UTCJul 22, 15:10 UTC10m
2026-07-22 HBXXW - Jul 22, 11:55 UTCJul 22, 12:10 UTC15m
2026-07-21 HBXXW - Jul 21, 13:50 UTCJul 21, 14:55 UTC1h 5m
2026-07-21 HBXXW - Jul 21, 11:35 UTCJul 21, 12:05 UTC30m
2026-07-21 HBXXW - Jul 21, 07:25 UTCJul 21, 10:00 UTC2h 35m
2026-07-21 HBXXW - Jul 21, 06:05 UTCJul 21, 06:20 UTC15m
2026-07-20 HBXXW - Jul 20, 14:40 UTCJul 20, 15:00 UTC20m
2026-07-20 HBXXW - Jul 20, 12:35 UTCJul 20, 12:50 UTC15m
2026-07-20 HBXXW - Jul 20, 08:40 UTCJul 20, 09:20 UTC40m
2026-07-20 HBXXW - Jul 20, 06:10 UTCJul 20, 07:00 UTC50m
2026-07-17 HBXXW - Jul 17, 14:35 UTCJul 17, 15:05 UTC30m
2026-07-17 HBXXW - Jul 17, 11:55 UTCJul 17, 12:25 UTC30m
2026-07-17 HBXXW - Jul 17, 08:54 UTCJul 17, 09:40 UTC45m
2026-07-17 HBXXW - Jul 17, 05:35 UTCJul 17, 06:29 UTC55m
2026-07-16 HBXXW - Jul 16, 15:14 UTCJul 16, 16:00 UTC45m
2026-07-16 HBXXW - Jul 16, 09:25 UTCJul 16, 09:30 UTC5m
2026-07-16 HBXXW - Jul 16, 06:20 UTCJul 16, 07:00 UTC40m
2026-07-16 HBXXW - Jul 16, 05:40 UTCJul 16, 05:55 UTC15m
2026-07-15 HBXXW - Jul 15, 15:15 UTCJul 15, 16:00 UTC45m
2026-07-15 HBXXW - Jul 15, 12:40 UTCJul 15, 13:55 UTC1h 15m
2026-07-15 HBXXW - Jul 15, 11:05 UTCJul 15, 11:55 UTC50m
2026-07-15 HBXXW - Jul 15, 08:20 UTCJul 15, 08:40 UTC20m
2026-07-15 HBXXW - Jul 15, 07:30 UTCJul 15, 07:40 UTC10m
2026-07-15 HBXXW - Jul 15, 05:40 UTCJul 15, 06:05 UTC25m
2026-07-14 HBXXW - Jul 14, 18:25 UTCJul 14, 20:05 UTC1h 40m
2026-07-14 HBXXW - Jul 14, 15:05 UTCJul 14, 15:20 UTC15m
2026-07-14 HBXXW - Jul 14, 13:25 UTCJul 14, 14:05 UTC40m
2026-07-14 HBXXW - Jul 14, 09:45 UTCJul 14, 10:05 UTC20m
2026-07-14 HBXXW - Jul 14, 06:45 UTCJul 14, 08:05 UTC1h 20m
2026-07-13 HBXXW - Jul 13, 11:15 UTCJul 13, 11:55 UTC40m
2026-07-13 HBXXW - Jul 13, 07:50 UTCJul 13, 09:55 UTC2h 5m
2026-07-12 HBXXW - Jul 12, 15:05 UTCJul 12, 15:20 UTC15m
2026-07-10 HBXXW - Jul 10, 15:35 UTCJul 10, 16:35 UTC1h 0m
2026-07-10 HBXXW - Jul 10, 12:15 UTCJul 10, 12:25 UTC10m
2026-07-10 HBXXW - Jul 10, 08:35 UTCJul 10, 08:50 UTC15m
2026-07-10 HBXXW - Jul 10, 07:25 UTCJul 10, 08:00 UTC35m
2026-07-09 HBXXW - Jul 9, 15:30 UTCJul 9, 15:45 UTC15m
2026-07-09 HBXXW - Jul 9, 12:00 UTCJul 9, 12:40 UTC40m
2026-07-09 HBXXW - Jul 9, 08:10 UTCJul 9, 09:10 UTC1h 0m
2026-07-09 HBXXW - Jul 9, 07:00 UTCJul 9, 07:40 UTC40m
2026-07-08 HBXXW - Jul 8, 14:20 UTCJul 8, 15:50 UTC1h 30m
2026-07-08 HBXXW - Jul 8, 06:50 UTCJul 8, 09:50 UTC3h 0m

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

Mode-S 4B3F28 frequently asked

What is Mode-S code 4B3F28?
4B3F28 is an ICAO 24-bit transponder address. Allocated to Switzerland. Assigned to HB-XXW.
Where is Mode-S 4B3F28 registered?
Mode-S code 4B3F28 is allocated to Switzerland (CH). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 4B3F28 broadcasting right now?
No active broadcast right now. Last signal was Jul 24, 17:15 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 4B3F28, octal 22637450, decimal 4,931,368.
What flights does 4B3F28 operate?
Mode-S 4B3F28 has broadcast 1 distinct callsign, including HBXXW.