Apparatus

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sensors Mode-S transponder

4B0B24

ICAO 24-bit transponder address · allocated to Switzerland

Currently assigned to HB-EFS · CENTRE EST Dauphin

Hex
4B0B24
Octal
22605444
Decimal
4,918,052
Country
CH
Tail
HB-EFS
Type
DR22
No current signal · last broadcast 17h ago
Flights observed
50
Distinct callsigns
1
Country
CH
Last broadcast
17h ago

Last known position

Most recent position reported by Mode-S 4B0B24.

Country allocation

The ICAO 24-bit address 4B0B24 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
HBEFS - 50 2026-07-17

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-17 HBEFS - Jul 17, 08:49 UTCJul 17, 08:59 UTC10m
2026-07-14 HBEFS - Jul 14, 15:25 UTCJul 14, 15:35 UTC10m
2026-07-12 HBEFS - Jul 12, 08:35 UTCJul 12, 08:45 UTC10m
2026-07-10 HBEFS - Jul 10, 12:55 UTCJul 10, 13:10 UTC15m
2026-07-10 HBEFS - Jul 10, 09:35 UTCJul 10, 10:40 UTC1h 5m
2026-07-08 HBEFS - Jul 8, 15:35 UTCJul 8, 16:35 UTC1h 0m
2026-07-07 HBEFS - Jul 7, 17:55 UTCJul 7, 19:00 UTC1h 5m
2026-07-07 HBEFS - Jul 7, 15:15 UTCJul 7, 16:05 UTC50m
2026-07-06 HBEFS - Jul 6, 15:15 UTCJul 6, 15:30 UTC15m
2026-07-06 HBEFS - Jul 6, 12:55 UTCJul 6, 13:10 UTC15m
2026-07-04 HBEFS - Jul 4, 15:15 UTCJul 4, 15:55 UTC40m
2026-06-29 HBEFS - Jun 29, 15:24 UTCJun 29, 15:39 UTC15m
2026-06-28 HBEFS - Jun 28, 13:55 UTCJun 28, 14:19 UTC25m
2026-06-28 HBEFS - Jun 28, 12:25 UTCJun 28, 12:39 UTC15m
2026-06-27 HBEFS - Jun 27, 09:29 UTCJun 27, 10:00 UTC30m
2026-06-27 HBEFS - Jun 27, 07:55 UTCJun 27, 08:10 UTC15m
2026-06-27 HBEFS - Jun 27, 06:19 UTCJun 27, 06:35 UTC15m
2026-06-26 HBEFS - Jun 26, 17:19 UTCJun 26, 17:40 UTC20m
2026-06-25 HBEFS - Jun 25, 16:14 UTCJun 25, 16:29 UTC15m
2026-06-23 HBEFS - Jun 23, 05:59 UTCJun 23, 06:39 UTC40m
2026-06-21 HBEFS - Jun 21, 16:44 UTCJun 21, 16:59 UTC15m
2026-06-21 HBEFS - Jun 21, 12:24 UTCJun 21, 12:49 UTC25m
2026-05-30 HBEFS - May 30, 16:25 UTCMay 30, 16:35 UTC10m
2026-05-30 HBEFS - May 30, 15:30 UTCMay 30, 15:50 UTC20m
2026-05-29 HBEFS - May 29, 15:05 UTCMay 29, 15:20 UTC15m
2026-05-27 HBEFS - May 27, 15:55 UTCMay 27, 16:10 UTC15m
2026-05-27 HBEFS - May 27, 11:20 UTCMay 27, 11:45 UTC25m
2026-05-27 HBEFS - May 27, 07:45 UTCMay 27, 08:15 UTC30m
2026-05-26 HBEFS - May 26, 12:24 UTCMay 26, 12:35 UTC10m
2026-05-25 HBEFS - May 25, 15:55 UTCMay 25, 16:10 UTC15m
2026-05-25 HBEFS - May 25, 15:05 UTCMay 25, 15:15 UTC10m
2026-05-24 HBEFS - May 24, 15:15 UTCMay 24, 15:35 UTC20m
2026-05-24 HBEFS - May 24, 13:35 UTCMay 24, 14:25 UTC50m
2026-05-24 HBEFS - May 24, 11:55 UTCMay 24, 12:25 UTC30m
2026-05-02 HBEFS - May 2, 06:50 UTCMay 2, 07:10 UTC20m
2026-05-01 HBEFS - May 1, 16:35 UTCMay 1, 16:55 UTC20m
2026-05-01 HBEFS - May 1, 16:00 UTCMay 1, 16:30 UTC30m
2026-05-01 HBEFS - May 1, 11:55 UTCMay 1, 12:10 UTC15m
2026-04-26 HBEFS - Apr 26, 15:45 UTCApr 26, 15:55 UTC10m
2026-04-26 HBEFS - Apr 26, 10:20 UTCApr 26, 10:45 UTC25m
2026-04-26 HBEFS - Apr 26, 08:50 UTCApr 26, 09:25 UTC35m
2026-04-26 HBEFS - Apr 26, 07:30 UTCApr 26, 08:05 UTC35m
2026-04-25 HBEFS - Apr 25, 07:45 UTCApr 25, 08:05 UTC20m
2026-04-18 HBEFS - Apr 18, 14:55 UTCApr 18, 15:10 UTC15m
2026-04-18 HBEFS - Apr 18, 08:15 UTCApr 18, 08:25 UTC10m
2026-04-18 HBEFS - Apr 18, 07:50 UTCApr 18, 08:05 UTC15m
2026-04-17 HBEFS - Apr 17, 06:55 UTCApr 17, 07:15 UTC20m
2026-04-17 HBEFS - Apr 17, 06:00 UTCApr 17, 06:20 UTC20m
2026-04-16 HBEFS - Apr 16, 13:50 UTCApr 16, 15:00 UTC1h 10m
2026-04-16 HBEFS - Apr 16, 11:09 UTCApr 16, 12:14 UTC1h 5m

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

Mode-S 4B0B24 frequently asked

What is Mode-S code 4B0B24?
4B0B24 is an ICAO 24-bit transponder address. Allocated to Switzerland. Assigned to HB-EFS.
Where is Mode-S 4B0B24 registered?
Mode-S code 4B0B24 is allocated to Switzerland (CH). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 4B0B24 broadcasting right now?
No active broadcast right now. Last signal was 17h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 4B0B24, octal 22605444, decimal 4,918,052.
What flights does 4B0B24 operate?
Mode-S 4B0B24 has broadcast 1 distinct callsign, including HBEFS.