Apparatus

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sensors Mode-S transponder

4B447D

ICAO 24-bit transponder address · allocated to Switzerland

Currently assigned to HB-ZYJ · BELL 505 JetRanger X

Hex
4B447D
Octal
22642175
Decimal
4,932,733
Country
CH
Tail
HB-ZYJ
Type
B505
No current signal · last broadcast Jul 25, 11:15 UTC
Flights observed
107
Distinct callsigns
1
Country
CH
Last broadcast
Jul 25, 11:15 UTC

Last known position

Most recent position reported by Mode-S 4B447D.

Country allocation

The ICAO 24-bit address 4B447D 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
HBZYJ - 107 2026-07-25

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-25 HBZYJ - Jul 25, 10:45 UTCJul 25, 11:15 UTC30m
2026-07-24 HBZYJ - Jul 24, 16:05 UTCJul 24, 16:30 UTC25m
2026-07-23 HBZYJ - Jul 23, 19:00 UTCJul 23, 19:15 UTC15m
2026-07-23 HBZYJ - Jul 23, 12:30 UTCJul 23, 12:40 UTC10m
2026-07-23 HBZYJ - Jul 23, 07:15 UTCJul 23, 08:40 UTC1h 25m
2026-07-22 HBZYJ - Jul 22, 11:20 UTCJul 22, 11:45 UTC25m
2026-07-21 HBZYJ - Jul 21, 08:50 UTCJul 21, 09:45 UTC55m
2026-07-20 HBZYJ - Jul 20, 09:40 UTCJul 20, 10:30 UTC50m
2026-07-20 HBZYJ - Jul 20, 08:15 UTCJul 20, 08:40 UTC25m
2026-07-18 HBZYJ - Jul 18, 14:50 UTCJul 18, 15:40 UTC50m
2026-07-16 HBZYJ - Jul 16, 10:00 UTCJul 16, 10:25 UTC25m
2026-07-16 HBZYJ - Jul 16, 07:50 UTCJul 16, 08:55 UTC1h 5m
2026-07-15 HBZYJ - Jul 15, 07:50 UTCJul 15, 11:25 UTC3h 35m
2026-07-08 HBZYJ - Jul 8, 08:05 UTCJul 8, 08:45 UTC40m
2026-07-05 HBZYJ - Jul 5, 19:00 UTCJul 5, 19:20 UTC20m
2026-07-04 HBZYJ - Jul 4, 15:10 UTCJul 4, 16:00 UTC50m
2026-07-01 HBZYJ - Jul 1, 09:15 UTCJul 1, 09:35 UTC20m
2026-06-30 HBZYJ - Jun 30, 07:20 UTCJun 30, 08:25 UTC1h 5m
2026-06-29 HBZYJ - Jun 29, 11:55 UTCJun 29, 13:09 UTC1h 15m
2026-06-29 HBZYJ - Jun 29, 07:44 UTCJun 29, 08:39 UTC55m
2026-06-28 HBZYJ - Jun 28, 10:24 UTCJun 28, 10:35 UTC10m
2026-06-28 HBZYJ - Jun 28, 07:34 UTCJun 28, 08:34 UTC1h 0m
2026-06-27 HBZYJ - Jun 27, 09:34 UTCJun 27, 10:29 UTC55m
2026-06-27 HBZYJ - Jun 27, 07:45 UTCJun 27, 08:25 UTC40m
2026-06-27 HBZYJ - Jun 27, 06:35 UTCJun 27, 06:59 UTC25m
2026-06-24 HBZYJ - Jun 24, 18:25 UTCJun 24, 18:34 UTC10m
2026-06-24 HBZYJ - Jun 24, 07:54 UTCJun 24, 08:20 UTC25m
2026-06-23 HBZYJ - Jun 23, 15:15 UTCJun 23, 15:44 UTC30m
2026-06-20 HBZYJ - Jun 20, 12:54 UTCJun 20, 13:24 UTC30m
2026-06-20 HBZYJ - Jun 20, 09:34 UTCJun 20, 09:54 UTC20m
2026-06-19 HBZYJ - Jun 19, 06:54 UTCJun 19, 07:45 UTC50m
2026-06-19 HBZYJ - Jun 19, 05:30 UTCJun 19, 05:45 UTC15m
2026-06-18 HBZYJ - Jun 18, 08:25 UTCJun 18, 08:55 UTC30m
2026-06-07 HBZYJ - Jun 7, 13:35 UTCJun 7, 14:25 UTC50m
2026-06-07 HBZYJ - Jun 7, 09:15 UTCJun 7, 09:45 UTC30m
2026-06-03 HBZYJ - Jun 3, 17:20 UTCJun 3, 18:05 UTC45m
2026-06-01 HBZYJ - Jun 1, 08:25 UTCJun 1, 08:45 UTC20m
2026-05-31 HBZYJ - May 31, 10:10 UTCMay 31, 10:25 UTC15m
2026-05-31 HBZYJ - May 31, 08:55 UTCMay 31, 09:25 UTC30m
2026-05-30 HBZYJ - May 30, 15:15 UTCMay 30, 15:45 UTC30m
2026-05-30 HBZYJ - May 30, 12:05 UTCMay 30, 13:10 UTC1h 5m
2026-05-30 HBZYJ - May 30, 08:30 UTCMay 30, 10:25 UTC1h 55m
2026-05-27 HBZYJ - May 27, 15:25 UTCMay 27, 16:20 UTC55m
2026-05-27 HBZYJ - May 27, 14:25 UTCMay 27, 14:35 UTC10m
2026-05-27 HBZYJ - May 27, 13:55 UTCMay 27, 14:20 UTC25m
2026-05-26 HBZYJ - May 26, 12:14 UTCMay 26, 12:30 UTC15m
2026-05-26 HBZYJ - May 26, 06:39 UTCMay 26, 07:45 UTC1h 5m
2026-05-25 HBZYJ - May 25, 14:20 UTCMay 25, 14:45 UTC25m
2026-05-25 HBZYJ - May 25, 13:05 UTCMay 25, 13:25 UTC20m
2026-05-24 HBZYJ - May 24, 15:35 UTCMay 24, 16:35 UTC1h 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-ZYJ page for operator, model, and routing details .

Mode-S 4B447D frequently asked

What is Mode-S code 4B447D?
4B447D is an ICAO 24-bit transponder address. Allocated to Switzerland. Assigned to HB-ZYJ.
Where is Mode-S 4B447D registered?
Mode-S code 4B447D is allocated to Switzerland (CH). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 4B447D broadcasting right now?
No active broadcast right now. Last signal was Jul 25, 11:15 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 4B447D, octal 22642175, decimal 4,932,733.
What flights does 4B447D operate?
Mode-S 4B447D has broadcast 1 distinct callsign, including HBZYJ.