Apparatus

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sensors Mode-S transponder

4B303C

ICAO 24-bit transponder address · allocated to Switzerland

Currently assigned to HB-SGY

Hex
4B303C
Octal
22630074
Decimal
4,927,548
Country
CH
Tail
HB-SGY
Type
DA40
No current signal · last broadcast 10h ago
Flights observed
66
Distinct callsigns
1
Country
CH
Last broadcast
10h ago

Last known position

Most recent position reported by Mode-S 4B303C.

Country allocation

The ICAO 24-bit address 4B303C 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
HBSGY - 66 2026-06-02

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-06-02 HBSGY - Jun 2, 10:00 UTCJun 2, 10:35 UTC35m
2026-06-02 HBSGY - Jun 2, 06:30 UTCJun 2, 08:20 UTC1h 50m
2026-06-01 HBSGY BRN → ZRH Jun 1, 13:00 UTCJun 1, 13:30 UTC30m
2026-06-01 HBSGY - Jun 1, 11:10 UTCJun 1, 12:20 UTC1h 10m
2026-06-01 HBSGY - Jun 1, 09:30 UTCJun 1, 09:55 UTC25m
2026-05-30 HBSGY - May 30, 16:45 UTCMay 30, 17:40 UTC55m
2026-05-30 HBSGY - May 30, 14:35 UTCMay 30, 15:40 UTC1h 5m
2026-05-29 HBSGY ZRH → ZRH May 29, 14:30 UTCMay 29, 15:40 UTC1h 10m
2026-05-28 HBSGY - May 28, 08:45 UTCMay 28, 09:10 UTC25m
2026-05-28 HBSGY - May 28, 07:00 UTCMay 28, 08:00 UTC1h 0m
2026-05-26 HBSGY - May 26, 08:45 UTCMay 26, 09:35 UTC50m
2026-05-26 HBSGY - May 26, 07:45 UTCMay 26, 08:10 UTC25m
2026-05-26 HBSGY ZRH → BRN May 26, 06:25 UTCMay 26, 07:05 UTC40m
2026-05-25 HBSGY - May 25, 16:50 UTCMay 25, 17:40 UTC50m
2026-05-25 HBSGY - May 25, 15:40 UTCMay 25, 16:10 UTC30m
2026-05-25 HBSGY ZRH → ACH May 25, 12:35 UTCMay 25, 14:00 UTC1h 25m
2026-05-24 HBSGY LYN → ZRH May 24, 14:15 UTCMay 24, 15:45 UTC1h 30m
2026-05-23 HBSGY - May 23, 16:30 UTCMay 23, 18:00 UTC1h 30m
2026-05-22 HBSGY LYN → LTT May 22, 17:00 UTCMay 22, 18:20 UTC1h 20m
2026-05-22 HBSGY - May 22, 14:35 UTCMay 22, 15:45 UTC1h 10m
2026-05-22 HBSGY - May 22, 11:20 UTCMay 22, 12:25 UTC1h 6m
2026-05-21 HBSGY - May 21, 16:30 UTCMay 21, 17:30 UTC1h 0m
2026-05-21 HBSGY - May 21, 14:10 UTCMay 21, 15:00 UTC50m
2026-05-21 HBSGY FDH → ZRH May 21, 11:00 UTCMay 21, 11:35 UTC35m
2026-05-21 HBSGY FDH → FDH May 21, 09:40 UTCMay 21, 10:20 UTC40m
2026-05-21 HBSGY ZRH → FDH May 21, 08:55 UTCMay 21, 09:30 UTC35m
2026-05-17 HBSGY - May 17, 12:55 UTCMay 17, 14:20 UTC1h 25m
2026-05-17 HBSGY - May 17, 09:05 UTCMay 17, 09:35 UTC30m
2026-05-17 HBSGY - May 17, 08:00 UTCMay 17, 08:30 UTC30m
2026-05-16 HBSGY - May 16, 11:51 UTCMay 16, 12:45 UTC55m
2026-05-16 HBSGY - May 16, 08:26 UTCMay 16, 09:45 UTC1h 20m
2026-05-15 HBSGY - May 15, 14:50 UTCMay 15, 15:10 UTC20m
2026-05-15 HBSGY - May 15, 11:15 UTCMay 15, 11:40 UTC25m
2026-05-15 HBSGY - May 15, 09:20 UTCMay 15, 09:45 UTC25m
2026-05-15 HBSGY - May 15, 07:55 UTCMay 15, 08:25 UTC30m
2026-05-14 HBSGY - May 14, 11:05 UTCMay 14, 11:55 UTC50m
2026-05-14 HBSGY - May 14, 07:20 UTCMay 14, 07:35 UTC15m
2026-05-13 HBSGY - May 13, 14:00 UTCMay 13, 15:35 UTC1h 35m
2026-05-07 HBSGY ZRH → ZRH May 7, 16:50 UTCMay 7, 18:10 UTC1h 20m
2026-05-06 HBSGY - May 6, 08:35 UTCMay 6, 09:05 UTC30m
2026-05-06 HBSGY - May 6, 06:50 UTCMay 6, 07:55 UTC1h 5m
2026-05-03 HBSGY - May 3, 12:35 UTCMay 3, 12:45 UTC10m
2026-05-03 HBSGY - May 3, 10:45 UTCMay 3, 11:20 UTC35m
2026-05-03 HBSGY - May 3, 08:45 UTCMay 3, 09:20 UTC35m
2026-05-02 HBSGY - May 2, 12:50 UTCMay 2, 13:40 UTC50m
2026-05-02 HBSGY - May 2, 10:45 UTCMay 2, 11:05 UTC20m
2026-05-02 HBSGY - May 2, 08:50 UTCMay 2, 09:30 UTC40m
2026-05-01 HBSGY FDH → ZRH May 1, 15:35 UTCMay 1, 16:05 UTC30m
2026-05-01 HBSGY ZRH → FDH May 1, 12:50 UTCMay 1, 14:25 UTC1h 35m
2026-04-27 HBSGY - Apr 27, 06:05 UTCApr 27, 06:20 UTC15m

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

Mode-S 4B303C frequently asked

What is Mode-S code 4B303C?
4B303C is an ICAO 24-bit transponder address. Allocated to Switzerland. Assigned to HB-SGY.
Where is Mode-S 4B303C registered?
Mode-S code 4B303C is allocated to Switzerland (CH). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 4B303C broadcasting right now?
No active broadcast right now. Last signal was 10h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 4B303C, octal 22630074, decimal 4,927,548.
What flights does 4B303C operate?
Mode-S 4B303C has broadcast 1 distinct callsign, including HBSGY.