Apparatus

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sensors Mode-S transponder

4B42EF

ICAO 24-bit transponder address · allocated to Switzerland

Currently assigned to HB-ZJB · AIRBUS HELICOPTERS EC-120

Hex
4B42EF
Octal
22641357
Decimal
4,932,335
Country
CH
Tail
HB-ZJB
Type
EC20
No current signal · last broadcast 2d ago
Flights observed
49
Distinct callsigns
1
Country
CH
Last broadcast
2d ago

Last known position

Most recent position reported by Mode-S 4B42EF.

Country allocation

The ICAO 24-bit address 4B42EF 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
HBZJB - 49 2026-07-21

Recent flights last 49

DateFlightRouteTakeoffLandingDuration
2026-07-21 HBZJB - Jul 21, 11:45 UTCJul 21, 12:40 UTC55m
2026-07-21 HBZJB - Jul 21, 10:50 UTCJul 21, 11:10 UTC20m
2026-07-21 HBZJB - Jul 21, 07:55 UTCJul 21, 08:50 UTC55m
2026-07-16 HBZJB - Jul 16, 07:05 UTCJul 16, 07:35 UTC30m
2026-07-14 HBZJB - Jul 14, 11:35 UTCJul 14, 11:45 UTC10m
2026-07-12 HBZJB - Jul 12, 13:50 UTCJul 12, 14:01 UTC10m
2026-07-11 HBZJB - Jul 11, 13:00 UTCJul 11, 13:15 UTC15m
2026-07-11 HBZJB - Jul 11, 09:30 UTCJul 11, 09:50 UTC20m
2026-07-08 HBZJB - Jul 8, 08:00 UTCJul 8, 08:10 UTC10m
2026-07-08 HBZJB - Jul 8, 06:30 UTCJul 8, 06:55 UTC25m
2026-06-26 HBZJB - Jun 26, 07:20 UTCJun 26, 07:35 UTC15m
2026-06-26 HBZJB - Jun 26, 06:54 UTCJun 26, 07:14 UTC20m
2026-06-19 HBZJB - Jun 19, 11:14 UTCJun 19, 11:45 UTC30m
2026-06-19 HBZJB - Jun 19, 09:34 UTCJun 19, 09:49 UTC15m
2026-06-16 HBZJB - Jun 16, 11:35 UTCJun 16, 12:55 UTC1h 20m
2026-06-16 HBZJB - Jun 16, 05:30 UTCJun 16, 07:30 UTC2h 0m
2026-06-13 HBZJB - Jun 13, 11:25 UTCJun 13, 11:45 UTC20m
2026-06-13 HBZJB - Jun 13, 09:20 UTCJun 13, 09:35 UTC15m
2026-06-11 HBZJB - Jun 11, 14:50 UTCJun 11, 15:00 UTC10m
2026-06-11 HBZJB - Jun 11, 12:30 UTCJun 11, 12:45 UTC15m
2026-06-11 HBZJB - Jun 11, 07:20 UTCJun 11, 09:00 UTC1h 40m
2026-06-10 HBZJB - Jun 10, 12:00 UTCJun 10, 12:25 UTC25m
2026-06-10 HBZJB - Jun 10, 10:05 UTCJun 10, 10:35 UTC30m
2026-06-08 HBZJB - Jun 8, 08:35 UTCJun 8, 09:00 UTC25m
2026-06-08 HBZJB - Jun 8, 05:50 UTCJun 8, 08:30 UTC2h 40m
2026-05-28 HBZJB - May 28, 17:15 UTCMay 28, 19:10 UTC1h 55m
2026-05-28 HBZJB - May 28, 13:00 UTCMay 28, 13:25 UTC25m
2026-05-27 HBZJB - May 27, 09:50 UTCMay 27, 10:00 UTC10m
2026-05-21 HBZJB - May 21, 14:30 UTCMay 21, 14:40 UTC10m
2026-05-21 HBZJB - May 21, 13:20 UTCMay 21, 13:25 UTC5m
2026-05-21 HBZJB - May 21, 11:40 UTCMay 21, 12:40 UTC1h 0m
2026-05-21 HBZJB - May 21, 08:15 UTCMay 21, 09:45 UTC1h 30m
2026-05-21 HBZJB - May 21, 07:50 UTCMay 21, 08:00 UTC10m
2026-05-10 HBZJB - May 10, 07:45 UTCMay 10, 08:00 UTC15m
2026-05-09 HBZJB - May 9, 11:35 UTCMay 9, 12:05 UTC30m
2026-05-09 HBZJB - May 9, 10:00 UTCMay 9, 10:10 UTC10m
2026-05-07 HBZJB - May 7, 08:00 UTCMay 7, 08:25 UTC25m
2026-05-05 HBZJB - May 5, 09:05 UTCMay 5, 10:00 UTC55m
2026-05-01 HBZJB - May 1, 12:05 UTCMay 1, 12:25 UTC20m
2026-05-01 HBZJB - May 1, 11:40 UTCMay 1, 12:00 UTC20m
2026-05-01 HBZJB - May 1, 09:05 UTCMay 1, 10:00 UTC55m
2026-04-26 HBZJB - Apr 26, 11:25 UTCApr 26, 12:10 UTC45m
2026-04-25 HBZJB - Apr 25, 14:35 UTCApr 25, 14:45 UTC10m
2026-04-25 HBZJB - Apr 25, 12:35 UTCApr 25, 13:00 UTC25m
2026-04-24 HBZJB - Apr 24, 08:30 UTCApr 24, 08:55 UTC25m
2026-04-24 HBZJB - Apr 24, 07:35 UTCApr 24, 07:50 UTC15m
2026-04-22 HBZJB - Apr 22, 08:20 UTCApr 22, 09:10 UTC50m
2026-04-18 HBZJB - Apr 18, 11:50 UTCApr 18, 12:00 UTC10m
2026-04-18 HBZJB - Apr 18, 09:10 UTCApr 18, 09:40 UTC30m

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

Mode-S 4B42EF frequently asked

What is Mode-S code 4B42EF?
4B42EF is an ICAO 24-bit transponder address. Allocated to Switzerland. Assigned to HB-ZJB.
Where is Mode-S 4B42EF registered?
Mode-S code 4B42EF is allocated to Switzerland (CH). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 4B42EF broadcasting right now?
No active broadcast right now. Last signal was 2d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 4B42EF, octal 22641357, decimal 4,932,335.
What flights does 4B42EF operate?
Mode-S 4B42EF has broadcast 1 distinct callsign, including HBZJB.