Apparatus

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sensors Mode-S transponder

4B1A93

ICAO 24-bit transponder address · allocated to Switzerland

Currently assigned to HB-KBR · BRM AERO Bristell B23

Hex
4B1A93
Octal
22615223
Decimal
4,922,003
Country
CH
Tail
HB-KBR
Type
BR23
No current signal · last broadcast 1d ago
Flights observed
48
Distinct callsigns
1
Country
CH
Last broadcast
1d ago

Last known position

Most recent position reported by Mode-S 4B1A93.

Country allocation

The ICAO 24-bit address 4B1A93 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
HBKBR - 48 2026-06-01

Recent flights last 48

DateFlightRouteTakeoffLandingDuration
2026-06-01 HBKBR - Jun 1, 11:10 UTCJun 1, 12:35 UTC1h 25m
2026-05-31 HBKBR - May 31, 08:35 UTCMay 31, 09:30 UTC55m
2026-05-30 HBKBR - May 30, 15:00 UTCMay 30, 15:25 UTC25m
2026-05-30 HBKBR - May 30, 10:20 UTCMay 30, 12:45 UTC2h 25m
2026-05-30 HBKBR - May 30, 08:45 UTCMay 30, 09:25 UTC40m
2026-05-27 HBKBR - May 27, 10:40 UTCMay 27, 10:55 UTC15m
2026-05-25 HBKBR - May 25, 17:25 UTCMay 25, 17:35 UTC10m
2026-05-25 HBKBR - May 25, 17:00 UTCMay 25, 17:20 UTC20m
2026-05-25 HBKBR - May 25, 13:15 UTCMay 25, 13:25 UTC10m
2026-05-25 HBKBR - May 25, 10:35 UTCMay 25, 12:30 UTC1h 55m
2026-05-25 HBKBR - May 25, 09:05 UTCMay 25, 09:35 UTC30m
2026-05-24 HBKBR - May 24, 10:45 UTCMay 24, 11:35 UTC50m
2026-05-23 HBKBR - May 23, 16:30 UTCMay 23, 16:40 UTC10m
2026-05-23 HBKBR - May 23, 12:10 UTCMay 23, 13:25 UTC1h 15m
2026-05-23 HBKBR - May 23, 09:40 UTCMay 23, 10:55 UTC1h 15m
2026-05-17 HBKBR - May 17, 14:01 UTCMay 17, 14:10 UTC10m
2026-05-17 HBKBR - May 17, 12:55 UTCMay 17, 13:05 UTC10m
2026-05-17 HBKBR - May 17, 11:10 UTCMay 17, 11:30 UTC20m
2026-05-17 HBKBR - May 17, 10:00 UTCMay 17, 10:10 UTC10m
2026-05-09 HBKBR - May 9, 09:15 UTCMay 9, 10:35 UTC1h 20m
2026-05-08 HBKBR - May 8, 11:34 UTCMay 8, 11:44 UTC10m
2026-05-08 HBKBR - May 8, 09:09 UTCMay 8, 09:59 UTC50m
2026-05-07 HBKBR - May 7, 13:25 UTCMay 7, 13:45 UTC20m
2026-05-07 HBKBR - May 7, 12:35 UTCMay 7, 12:55 UTC20m
2026-05-07 HBKBR - May 7, 10:35 UTCMay 7, 11:10 UTC35m
2026-05-03 HBKBR - May 3, 11:35 UTCMay 3, 11:45 UTC10m
2026-05-03 HBKBR - May 3, 10:05 UTCMay 3, 10:20 UTC15m
2026-05-02 HBKBR - May 2, 16:20 UTCMay 2, 16:30 UTC10m
2026-05-02 HBKBR - May 2, 12:45 UTCMay 2, 13:25 UTC40m
2026-05-02 HBKBR - May 2, 10:35 UTCMay 2, 12:05 UTC1h 30m
2026-05-01 HBKBR - May 1, 12:10 UTCMay 1, 12:20 UTC10m
2026-05-01 HBKBR - May 1, 09:10 UTCMay 1, 10:25 UTC1h 15m
2026-04-26 HBKBR - Apr 26, 15:55 UTCApr 26, 16:30 UTC35m
2026-04-26 HBKBR - Apr 26, 14:10 UTCApr 26, 14:35 UTC25m
2026-04-26 HBKBR - Apr 26, 11:00 UTCApr 26, 12:50 UTC1h 50m
2026-04-25 HBKBR - Apr 25, 11:55 UTCApr 25, 13:05 UTC1h 10m
2026-04-25 HBKBR - Apr 25, 09:45 UTCApr 25, 11:15 UTC1h 30m
2026-04-25 HBKBR - Apr 25, 08:15 UTCApr 25, 09:05 UTC50m
2026-04-20 HBKBR - Apr 20, 10:35 UTCApr 20, 11:05 UTC30m
2026-04-19 HBKBR - Apr 19, 14:35 UTCApr 19, 14:45 UTC10m
2026-04-19 HBKBR - Apr 19, 12:15 UTCApr 19, 12:25 UTC10m
2026-04-19 HBKBR - Apr 19, 10:50 UTCApr 19, 11:05 UTC15m
2026-04-18 HBKBR - Apr 18, 12:10 UTCApr 18, 12:40 UTC30m
2026-04-18 HBKBR - Apr 18, 09:00 UTCApr 18, 10:45 UTC1h 45m
2026-04-17 HBKBR - Apr 17, 10:35 UTCApr 17, 11:15 UTC40m
2026-04-16 HBKBR - Apr 16, 11:29 UTCApr 16, 12:09 UTC40m
2026-04-16 HBKBR - Apr 16, 09:10 UTCApr 16, 09:59 UTC50m
2026-04-16 HBKBR - Apr 16, 08:15 UTCApr 16, 08:24 UTC10m

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

Mode-S 4B1A93 frequently asked

What is Mode-S code 4B1A93?
4B1A93 is an ICAO 24-bit transponder address. Allocated to Switzerland. Assigned to HB-KBR.
Where is Mode-S 4B1A93 registered?
Mode-S code 4B1A93 is allocated to Switzerland (CH). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 4B1A93 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 4B1A93, octal 22615223, decimal 4,922,003.
What flights does 4B1A93 operate?
Mode-S 4B1A93 has broadcast 1 distinct callsign, including HBKBR.