Apparatus

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sensors Mode-S transponder

4B441D

ICAO 24-bit transponder address · allocated to Switzerland

Currently assigned to HB-ZUR · ROBINSON R-66

Hex
4B441D
Octal
22642035
Decimal
4,932,637
Country
CH
Tail
HB-ZUR
Type
R66
No current signal · last broadcast 1d ago
Flights observed
167
Distinct callsigns
1
Country
CH
Last broadcast
1d ago

Last known position

Most recent position reported by Mode-S 4B441D.

Country allocation

The ICAO 24-bit address 4B441D 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
HBZUR - 167 2026-07-16

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-16 HBZUR - Jul 16, 11:20 UTCJul 16, 12:40 UTC1h 20m
2026-07-15 HBZUR - Jul 15, 11:20 UTCJul 15, 12:30 UTC1h 10m
2026-07-15 HBZUR - Jul 15, 08:40 UTCJul 15, 09:40 UTC1h 0m
2026-07-15 HBZUR - Jul 15, 07:00 UTCJul 15, 08:00 UTC1h 0m
2026-07-13 HBZUR - Jul 13, 14:30 UTCJul 13, 15:35 UTC1h 5m
2026-07-10 HBZUR - Jul 10, 11:55 UTCJul 10, 13:05 UTC1h 10m
2026-07-10 HBZUR - Jul 10, 08:45 UTCJul 10, 10:30 UTC1h 45m
2026-07-10 HBZUR - Jul 10, 05:35 UTCJul 10, 06:00 UTC25m
2026-07-09 HBZUR - Jul 9, 16:15 UTCJul 9, 17:00 UTC45m
2026-07-09 HBZUR - Jul 9, 14:10 UTCJul 9, 15:10 UTC1h 0m
2026-07-09 HBZUR - Jul 9, 11:20 UTCJul 9, 11:55 UTC35m
2026-07-09 HBZUR - Jul 9, 08:45 UTCJul 9, 09:10 UTC25m
2026-07-07 HBZUR - Jul 7, 09:25 UTCJul 7, 09:35 UTC10m
2026-07-07 HBZUR - Jul 7, 08:45 UTCJul 7, 09:00 UTC15m
2026-07-06 HBZUR - Jul 6, 15:15 UTCJul 6, 15:55 UTC40m
2026-07-06 HBZUR - Jul 6, 12:00 UTCJul 6, 12:50 UTC50m
2026-07-04 HBZUR - Jul 4, 15:55 UTCJul 4, 16:05 UTC10m
2026-07-04 HBZUR - Jul 4, 11:40 UTCJul 4, 12:45 UTC1h 5m
2026-07-04 HBZUR - Jul 4, 09:00 UTCJul 4, 09:15 UTC15m
2026-07-04 HBZUR - Jul 4, 07:10 UTCJul 4, 08:10 UTC1h 0m
2026-07-03 HBZUR - Jul 3, 13:15 UTCJul 3, 14:05 UTC50m
2026-07-02 HBZUR - Jul 2, 13:00 UTCJul 2, 13:25 UTC25m
2026-07-02 HBZUR - Jul 2, 06:20 UTCJul 2, 07:15 UTC55m
2026-07-01 HBZUR - Jul 1, 16:00 UTCJul 1, 17:10 UTC1h 10m
2026-07-01 HBZUR - Jul 1, 14:10 UTCJul 1, 15:00 UTC50m
2026-06-30 HBZUR - Jun 30, 14:50 UTCJun 30, 15:10 UTC20m
2026-06-30 HBZUR - Jun 30, 08:30 UTCJun 30, 09:25 UTC55m
2026-06-29 HBZUR - Jun 29, 15:19 UTCJun 29, 15:39 UTC20m
2026-06-29 HBZUR - Jun 29, 13:44 UTCJun 29, 14:29 UTC45m
2026-06-29 HBZUR - Jun 29, 12:34 UTCJun 29, 13:00 UTC25m
2026-06-29 HBZUR - Jun 29, 08:04 UTCJun 29, 09:34 UTC1h 30m
2026-06-27 HBZUR - Jun 27, 14:29 UTCJun 27, 14:39 UTC10m
2026-06-27 HBZUR - Jun 27, 11:55 UTCJun 27, 13:24 UTC1h 30m
2026-06-27 HBZUR - Jun 27, 09:44 UTCJun 27, 09:55 UTC10m
2026-06-27 HBZUR - Jun 27, 07:34 UTCJun 27, 08:39 UTC1h 5m
2026-06-26 HBZUR - Jun 26, 16:20 UTCJun 26, 17:04 UTC45m
2026-06-26 HBZUR - Jun 26, 11:24 UTCJun 26, 12:50 UTC1h 25m
2026-06-26 HBZUR - Jun 26, 07:05 UTCJun 26, 08:10 UTC1h 5m
2026-06-25 HBZUR - Jun 25, 17:20 UTCJun 25, 17:54 UTC35m
2026-06-25 HBZUR - Jun 25, 15:40 UTCJun 25, 16:39 UTC1h 0m
2026-06-25 HBZUR - Jun 25, 13:29 UTCJun 25, 13:59 UTC30m
2026-06-25 HBZUR - Jun 25, 11:25 UTCJun 25, 11:59 UTC35m
2026-06-25 HBZUR - Jun 25, 09:14 UTCJun 25, 10:15 UTC1h 0m
2026-06-24 HBZUR - Jun 24, 11:54 UTCJun 24, 12:44 UTC50m
2026-06-24 HBZUR - Jun 24, 07:05 UTCJun 24, 08:04 UTC1h 0m
2026-06-23 HBZUR - Jun 23, 11:40 UTCJun 23, 12:49 UTC1h 10m
2026-06-23 HBZUR - Jun 23, 09:24 UTCJun 23, 09:49 UTC25m
2026-06-22 HBZUR - Jun 22, 16:24 UTCJun 22, 17:25 UTC1h 0m
2026-06-22 HBZUR - Jun 22, 08:50 UTCJun 22, 09:54 UTC1h 5m
2026-06-22 HBZUR - Jun 22, 07:19 UTCJun 22, 07:40 UTC20m

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

Mode-S 4B441D frequently asked

What is Mode-S code 4B441D?
4B441D is an ICAO 24-bit transponder address. Allocated to Switzerland. Assigned to HB-ZUR.
Where is Mode-S 4B441D registered?
Mode-S code 4B441D is allocated to Switzerland (CH). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 4B441D broadcasting right now?
No active broadcast right now. Last signal was 1d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 4B441D, octal 22642035, decimal 4,932,637.
What flights does 4B441D operate?
Mode-S 4B441D has broadcast 1 distinct callsign, including HBZUR.