Apparatus

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sensors Mode-S transponder

4B1B1D

ICAO 24-bit transponder address · allocated to Switzerland

Currently assigned to HB-KGZ · BRM AERO Bristell B23

Hex
4B1B1D
Octal
22615435
Decimal
4,922,141
Country
CH
Tail
HB-KGZ
Type
BR23
No current signal · last broadcast 6d ago
Flights observed
97
Distinct callsigns
1
Country
CH
Last broadcast
6d ago

Last known position

Most recent position reported by Mode-S 4B1B1D.

Country allocation

The ICAO 24-bit address 4B1B1D 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
HBKGZ - 97 2026-07-11

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-11 HBKGZ - Jul 11, 09:40 UTCJul 11, 11:00 UTC1h 20m
2026-07-11 HBKGZ - Jul 11, 08:40 UTCJul 11, 08:55 UTC15m
2026-07-04 HBKGZ - Jul 4, 09:05 UTCJul 4, 09:25 UTC20m
2026-07-02 HBKGZ - Jul 2, 17:30 UTCJul 2, 18:05 UTC35m
2026-07-02 HBKGZ - Jul 2, 16:00 UTCJul 2, 16:40 UTC40m
2026-07-02 HBKGZ - Jul 2, 13:50 UTCJul 2, 14:00 UTC10m
2026-07-02 HBKGZ - Jul 2, 09:30 UTCJul 2, 13:05 UTC3h 35m
2026-06-30 HBKGZ - Jun 30, 13:00 UTCJun 30, 13:10 UTC10m
2026-06-30 HBKGZ - Jun 30, 11:30 UTCJun 30, 11:45 UTC15m
2026-06-30 HBKGZ - Jun 30, 09:20 UTCJun 30, 09:35 UTC15m
2026-06-29 HBKGZ - Jun 29, 13:54 UTCJun 29, 14:14 UTC20m
2026-06-29 HBKGZ - Jun 29, 12:49 UTCJun 29, 13:14 UTC25m
2026-06-29 HBKGZ - Jun 29, 11:25 UTCJun 29, 11:39 UTC15m
2026-06-28 HBKGZ - Jun 28, 11:29 UTCJun 28, 12:39 UTC1h 10m
2026-06-28 HBKGZ - Jun 28, 10:35 UTCJun 28, 10:50 UTC15m
2026-06-28 HBKGZ - Jun 28, 08:50 UTCJun 28, 09:10 UTC20m
2026-06-27 HBKGZ - Jun 27, 13:40 UTCJun 27, 14:00 UTC20m
2026-06-27 HBKGZ - Jun 27, 11:00 UTCJun 27, 12:45 UTC1h 45m
2026-06-27 HBKGZ - Jun 27, 07:55 UTCJun 27, 09:34 UTC1h 40m
2026-06-26 HBKGZ - Jun 26, 10:55 UTCJun 26, 11:20 UTC25m
2026-06-26 HBKGZ - Jun 26, 08:20 UTCJun 26, 10:20 UTC2h 0m
2026-06-25 HBKGZ - Jun 25, 09:14 UTCJun 25, 11:15 UTC2h 0m
2026-06-24 HBKGZ - Jun 24, 08:45 UTCJun 24, 10:39 UTC1h 55m
2026-06-23 HBKGZ - Jun 23, 08:30 UTCJun 23, 10:19 UTC1h 50m
2026-06-22 HBKGZ - Jun 22, 09:40 UTCJun 22, 10:25 UTC45m
2026-06-22 HBKGZ - Jun 22, 08:04 UTCJun 22, 08:54 UTC50m
2026-06-21 HBKGZ - Jun 21, 15:54 UTCJun 21, 16:14 UTC20m
2026-06-21 HBKGZ - Jun 21, 14:15 UTCJun 21, 14:34 UTC20m
2026-06-21 HBKGZ - Jun 21, 12:14 UTCJun 21, 12:35 UTC20m
2026-06-21 HBKGZ - Jun 21, 08:20 UTCJun 21, 11:40 UTC3h 20m
2026-06-20 HBKGZ - Jun 20, 16:59 UTCJun 20, 17:10 UTC10m
2026-06-20 HBKGZ - Jun 20, 14:19 UTCJun 20, 14:35 UTC15m
2026-06-20 HBKGZ - Jun 20, 07:44 UTCJun 20, 11:20 UTC3h 35m
2026-06-18 HBKGZ - Jun 18, 09:10 UTCJun 18, 10:20 UTC1h 10m
2026-06-11 HBKGZ - Jun 11, 14:05 UTCJun 11, 14:35 UTC30m
2026-06-11 HBKGZ - Jun 11, 11:05 UTCJun 11, 12:15 UTC1h 10m
2026-06-08 HBKGZ - Jun 8, 09:00 UTCJun 8, 10:30 UTC1h 30m
2026-06-07 HBKGZ - Jun 7, 10:35 UTCJun 7, 11:15 UTC40m
2026-06-06 HBKGZ - Jun 6, 12:20 UTCJun 6, 13:09 UTC50m
2026-06-06 HBKGZ - Jun 6, 08:15 UTCJun 6, 09:09 UTC55m
2026-06-05 HBKGZ - Jun 5, 11:35 UTCJun 5, 12:20 UTC45m
2026-06-04 HBKGZ - Jun 4, 07:20 UTCJun 4, 07:30 UTC10m
2026-05-31 HBKGZ - May 31, 11:10 UTCMay 31, 11:25 UTC15m
2026-05-29 HBKGZ - May 29, 11:40 UTCMay 29, 13:20 UTC1h 40m
2026-05-29 HBKGZ - May 29, 10:15 UTCMay 29, 11:05 UTC50m
2026-05-29 HBKGZ - May 29, 09:15 UTCMay 29, 09:45 UTC30m
2026-05-28 HBKGZ - May 28, 08:55 UTCMay 28, 10:05 UTC1h 10m
2026-05-26 HBKGZ - May 26, 13:19 UTCMay 26, 13:29 UTC10m
2026-05-26 HBKGZ - May 26, 08:30 UTCMay 26, 11:44 UTC3h 15m
2026-05-25 HBKGZ - May 25, 18:35 UTCMay 25, 18:55 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-KGZ page for operator, model, and routing details .

Mode-S 4B1B1D frequently asked

What is Mode-S code 4B1B1D?
4B1B1D is an ICAO 24-bit transponder address. Allocated to Switzerland. Assigned to HB-KGZ.
Where is Mode-S 4B1B1D registered?
Mode-S code 4B1B1D is allocated to Switzerland (CH). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 4B1B1D broadcasting right now?
No active broadcast right now. Last signal was 6d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 4B1B1D, octal 22615435, decimal 4,922,141.
What flights does 4B1B1D operate?
Mode-S 4B1B1D has broadcast 1 distinct callsign, including HBKGZ.