Apparatus

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sensors Mode-S transponder

4B204D

ICAO 24-bit transponder address · allocated to Switzerland

Hex
4B204D
Octal
22620115
Decimal
4,923,469
Country
CH
No current signal · last broadcast 16d ago
Flights observed
116
Distinct callsigns
1
Country
CH
Last broadcast
16d ago

Last known position

Most recent position reported by Mode-S 4B204D.

Country allocation

The ICAO 24-bit address 4B204D 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
HBMGB - 114 2026-07-02

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-02 HBMGB ACH → ACH Jul 2, 07:40 UTCJul 2, 08:05 UTC25m
2026-06-30 HBMGB ACH → ACH Jun 30, 08:30 UTCJun 30, 08:55 UTC25m
2026-06-30 HBMGB - Jun 30, 07:35 UTCJun 30, 07:50 UTC15m
2026-06-29 HBMGB ACH → ACH Jun 29, 11:39 UTCJun 29, 12:05 UTC25m
2026-06-27 HBMGB ACH → ACH Jun 27, 07:59 UTCJun 27, 08:25 UTC25m
2026-06-27 HBMGB - Jun 27, 06:44 UTCJun 27, 07:15 UTC30m
2026-06-26 HBMGB - Jun 26, 15:25 UTCJun 26, 15:45 UTC20m
2026-06-26 HBMGB ACH → ACH Jun 26, 06:19 UTCJun 26, 06:39 UTC20m
2026-06-24 HBMGB - Jun 24, 06:45 UTCJun 24, 06:59 UTC15m
2026-06-23 HBMGB - Jun 23, 07:49 UTCJun 23, 08:30 UTC40m
2026-06-20 HBMGB ACH → ACH Jun 20, 06:39 UTCJun 20, 07:00 UTC20m
2026-06-18 HBMGB - Jun 18, 12:25 UTCJun 18, 12:55 UTC30m
2026-06-17 HBMGB ACH → ACH Jun 17, 07:00 UTCJun 17, 07:25 UTC25m
2026-06-15 HBMGB ACH → ACH Jun 15, 15:45 UTCJun 15, 16:09 UTC25m
2026-06-15 HBMGB ACH → ACH Jun 15, 14:24 UTCJun 15, 14:45 UTC20m
2026-06-15 HBMGB ACH → ACH Jun 15, 11:54 UTCJun 15, 12:25 UTC30m
2026-06-15 HBMGB - Jun 15, 07:50 UTCJun 15, 08:10 UTC20m
2026-06-13 HBMGB - Jun 13, 11:55 UTCJun 13, 12:10 UTC15m
2026-06-13 HBMGB ACH → ACH Jun 13, 08:10 UTCJun 13, 08:35 UTC25m
2026-06-13 HBMGB - Jun 13, 06:40 UTCJun 13, 07:00 UTC20m
2026-06-12 HBMGB - Jun 12, 14:30 UTCJun 12, 15:00 UTC30m
2026-06-11 HBMGB - Jun 11, 16:00 UTCJun 11, 16:20 UTC20m
2026-06-08 HBMGB - Jun 8, 14:40 UTCJun 8, 15:30 UTC50m
2026-06-08 HBMGB - Jun 8, 08:50 UTCJun 8, 09:10 UTC20m
2026-06-08 HBMGB - Jun 8, 06:40 UTCJun 8, 07:10 UTC30m
2026-06-07 HBMGB - Jun 7, 13:45 UTCJun 7, 14:45 UTC1h 0m
2026-06-06 HBMGB - Jun 6, 09:30 UTCJun 6, 09:39 UTC10m
2026-06-06 HBMGB - Jun 6, 07:25 UTCJun 6, 07:40 UTC15m
2026-06-05 HBMGB - Jun 5, 17:25 UTCJun 5, 18:15 UTC50m
2026-06-05 HBMGB - Jun 5, 12:15 UTCJun 5, 13:40 UTC1h 25m
2026-06-05 HBMGB - Jun 5, 08:25 UTCJun 5, 08:40 UTC15m
2026-06-05 HBMGB - Jun 5, 07:25 UTCJun 5, 07:45 UTC20m
2026-06-04 HBMGB - Jun 4, 13:10 UTCJun 4, 13:30 UTC20m
2026-06-04 HBMGB - Jun 4, 08:45 UTCJun 4, 09:10 UTC25m
2026-06-04 HBMGB - Jun 4, 07:45 UTCJun 4, 08:05 UTC20m
2026-06-03 HBMGB - Jun 3, 14:50 UTCJun 3, 15:10 UTC20m
2026-06-03 HBMGB - Jun 3, 13:40 UTCJun 3, 14:00 UTC20m
2026-06-03 HBMGB - Jun 3, 09:15 UTCJun 3, 09:35 UTC20m
2026-06-03 HBMGB - Jun 3, 08:25 UTCJun 3, 08:45 UTC20m
2026-06-02 HBMGB - Jun 2, 14:00 UTCJun 2, 14:20 UTC20m
2026-06-02 HBMGB - Jun 2, 13:05 UTCJun 2, 13:30 UTC25m
2026-06-02 HBMGB - Jun 2, 09:10 UTCJun 2, 09:30 UTC20m
2026-06-02 HBMGB - Jun 2, 08:20 UTCJun 2, 09:05 UTC45m
2026-06-01 HBMGB - Jun 1, 13:55 UTCJun 1, 14:15 UTC20m
2026-06-01 HBMGB - Jun 1, 13:05 UTCJun 1, 13:20 UTC15m
2026-06-01 HBMGB - Jun 1, 07:00 UTCJun 1, 08:30 UTC1h 30m
2026-05-29 HBMGB - May 29, 14:35 UTCMay 29, 15:05 UTC30m
2026-05-29 HBMGB - May 29, 08:25 UTCMay 29, 08:50 UTC25m
2026-05-28 HBMGB - May 28, 14:10 UTCMay 28, 14:55 UTC45m
2026-05-28 HBMGB EPL → EPL May 28, 12:00 UTCMay 28, 12:15 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.

Mode-S 4B204D frequently asked

What is Mode-S code 4B204D?
4B204D is an ICAO 24-bit transponder address. Allocated to Switzerland.
Where is Mode-S 4B204D registered?
Mode-S code 4B204D is allocated to Switzerland (CH). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 4B204D broadcasting right now?
No active broadcast right now. Last signal was 16d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 4B204D, octal 22620115, decimal 4,923,469.
What flights does 4B204D operate?
Mode-S 4B204D has broadcast 1 distinct callsign, including HBMGB.