Apparatus

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sensors Mode-S transponder

4B4400

ICAO 24-bit transponder address · allocated to Switzerland

Currently assigned to HB-ZTO · AEROSPATIALE AS-350 Ecureuil

Hex
4B4400
Octal
22642000
Decimal
4,932,608
Country
CH
Tail
HB-ZTO
Type
AS50
No current signal · last broadcast Jul 26, 11:25 UTC
Flights observed
200
Distinct callsigns
1
Country
CH
Last broadcast
Jul 26, 11:25 UTC

Last known position

Most recent position reported by Mode-S 4B4400.

Country allocation

The ICAO 24-bit address 4B4400 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
HBZTO - 200 2026-07-26

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 HBZTO - Jul 26, 10:45 UTCJul 26, 11:25 UTC40m
2026-07-26 HBZTO - Jul 26, 09:05 UTCJul 26, 09:15 UTC10m
2026-07-26 HBZTO - Jul 26, 07:45 UTCJul 26, 07:55 UTC10m
2026-07-25 HBZTO - Jul 25, 11:05 UTCJul 25, 14:15 UTC3h 10m
2026-07-25 HBZTO - Jul 25, 08:05 UTCJul 25, 09:40 UTC1h 35m
2026-07-24 HBZTO - Jul 24, 13:55 UTCJul 24, 14:55 UTC1h 0m
2026-07-24 HBZTO - Jul 24, 12:05 UTCJul 24, 12:40 UTC35m
2026-07-24 HBZTO - Jul 24, 07:00 UTCJul 24, 07:55 UTC55m
2026-07-24 HBZTO - Jul 24, 05:10 UTCJul 24, 05:25 UTC15m
2026-07-23 HBZTO - Jul 23, 13:55 UTCJul 23, 15:25 UTC1h 30m
2026-07-23 HBZTO - Jul 23, 11:05 UTCJul 23, 13:15 UTC2h 10m
2026-07-23 HBZTO - Jul 23, 06:00 UTCJul 23, 07:00 UTC1h 0m
2026-07-22 HBZTO - Jul 22, 15:15 UTCJul 22, 15:40 UTC25m
2026-07-22 HBZTO - Jul 22, 14:00 UTCJul 22, 14:45 UTC45m
2026-07-22 HBZTO - Jul 22, 11:15 UTCJul 22, 13:00 UTC1h 45m
2026-07-21 HBZTO - Jul 21, 11:00 UTCJul 21, 11:50 UTC50m
2026-07-21 HBZTO - Jul 21, 08:35 UTCJul 21, 08:45 UTC10m
2026-07-21 HBZTO - Jul 21, 07:25 UTCJul 21, 08:00 UTC35m
2026-07-21 HBZTO - Jul 21, 05:15 UTCJul 21, 05:30 UTC15m
2026-07-20 HBZTO - Jul 20, 11:35 UTCJul 20, 11:50 UTC15m
2026-07-20 HBZTO - Jul 20, 07:45 UTCJul 20, 09:25 UTC1h 40m
2026-07-20 HBZTO - Jul 20, 07:05 UTCJul 20, 07:20 UTC15m
2026-07-20 HBZTO - Jul 20, 05:10 UTCJul 20, 05:30 UTC20m
2026-07-19 HBZTO - Jul 19, 13:25 UTCJul 19, 13:50 UTC25m
2026-07-19 HBZTO - Jul 19, 12:00 UTCJul 19, 12:10 UTC10m
2026-07-19 HBZTO - Jul 19, 11:10 UTCJul 19, 11:25 UTC15m
2026-07-19 HBZTO - Jul 19, 09:00 UTCJul 19, 10:00 UTC1h 0m
2026-07-19 HBZTO - Jul 19, 08:20 UTCJul 19, 08:30 UTC10m
2026-07-18 HBZTO - Jul 18, 11:05 UTCJul 18, 11:40 UTC35m
2026-07-17 HBZTO - Jul 17, 13:50 UTCJul 17, 14:04 UTC15m
2026-07-10 HBZTO - Jul 10, 07:40 UTCJul 10, 08:35 UTC55m
2026-07-10 HBZTO - Jul 10, 06:40 UTCJul 10, 07:00 UTC20m
2026-07-08 HBZTO - Jul 8, 14:00 UTCJul 8, 14:20 UTC20m
2026-07-08 HBZTO - Jul 8, 13:20 UTCJul 8, 13:30 UTC10m
2026-07-07 HBZTO - Jul 7, 12:25 UTCJul 7, 13:15 UTC50m
2026-07-07 HBZTO - Jul 7, 11:10 UTCJul 7, 11:30 UTC20m
2026-07-07 HBZTO - Jul 7, 08:45 UTCJul 7, 09:20 UTC35m
2026-07-06 HBZTO - Jul 6, 11:55 UTCJul 6, 12:20 UTC25m
2026-07-06 HBZTO - Jul 6, 07:20 UTCJul 6, 07:40 UTC20m
2026-07-06 HBZTO - Jul 6, 05:00 UTCJul 6, 06:00 UTC1h 0m
2026-07-03 HBZTO - Jul 3, 11:30 UTCJul 3, 12:25 UTC55m
2026-07-03 HBZTO - Jul 3, 11:00 UTCJul 3, 11:10 UTC10m
2026-07-02 HBZTO - Jul 2, 13:05 UTCJul 2, 13:45 UTC40m
2026-07-02 HBZTO - Jul 2, 11:00 UTCJul 2, 12:15 UTC1h 15m
2026-07-02 HBZTO - Jul 2, 08:30 UTCJul 2, 09:30 UTC1h 0m
2026-07-02 HBZTO - Jul 2, 05:05 UTCJul 2, 07:20 UTC2h 15m
2026-06-30 HBZTO - Jun 30, 13:20 UTCJun 30, 13:55 UTC35m
2026-06-30 HBZTO - Jun 30, 11:15 UTCJun 30, 12:35 UTC1h 20m
2026-06-30 HBZTO - Jun 30, 07:10 UTCJun 30, 09:55 UTC2h 45m
2026-06-29 HBZTO - Jun 29, 13:30 UTCJun 29, 14:14 UTC45m

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

Mode-S 4B4400 frequently asked

What is Mode-S code 4B4400?
4B4400 is an ICAO 24-bit transponder address. Allocated to Switzerland. Assigned to HB-ZTO.
Where is Mode-S 4B4400 registered?
Mode-S code 4B4400 is allocated to Switzerland (CH). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 4B4400 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 11:25 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 4B4400, octal 22642000, decimal 4,932,608.
What flights does 4B4400 operate?
Mode-S 4B4400 has broadcast 1 distinct callsign, including HBZTO.