Apparatus

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sensors Mode-S transponder

4B1A02

ICAO 24-bit transponder address · allocated to Switzerland

Currently assigned to HB-JWC · BOMBARDIER CL-600 Challenger

Hex
4B1A02
Octal
22615002
Decimal
4,921,858
Country
CH
Tail
HB-JWC
Type
CL60
No current signal · last broadcast 2d ago
Flights observed
237
Distinct callsigns
12
Country
CH
Last broadcast
2d ago

Last known position

Most recent position reported by Mode-S 4B1A02.

Country allocation

The ICAO 24-bit address 4B1A02 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 12 distinct

Callsign Airline Flights Last seen
SAZ71 - 63 2026-07-13
SAZ72 - 55 2026-07-12
SAZ73 - 43 2026-07-12
SAZ74 - 34 2026-07-15
SAZ75 - 19 2026-07-15
SAZ76 - 9 2026-07-12
SAZ77 - 3 2026-07-01
SAZ52 - 3 2026-06-21
SAZ51 - 3 2026-06-21
SAZ54 - 2 2026-06-07
SAZ53 - 2 2026-06-07
SAZ55 - 1 2026-06-06

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-15 SAZ75 - Jul 15, 18:35 UTCJul 15, 20:45 UTC2h 10m
2026-07-15 SAZ74 - Jul 15, 17:45 UTCJul 15, 17:55 UTC10m
2026-07-15 SAZ74 - Jul 15, 02:35 UTCJul 15, 16:40 UTC14h 5m
2026-07-13 SAZ71 - Jul 13, 07:01 UTCJul 13, 22:10 UTC15h 10m
2026-07-12 SAZ76 - Jul 12, 23:10 UTCJul 13, 01:01 UTC1h 50m
2026-07-12 SAZ75 - Jul 12, 19:40 UTCJul 12, 21:00 UTC1h 20m
2026-07-12 SAZ74 BRS → ZRH Jul 12, 13:35 UTCJul 12, 15:01 UTC1h 25m
2026-07-12 SAZ73 GVA → BRS Jul 12, 10:50 UTCJul 12, 12:20 UTC1h 30m
2026-07-12 SAZ72 - Jul 12, 08:50 UTCJul 12, 09:40 UTC50m
2026-07-12 SAZ71 ZRH → CEQ Jul 12, 07:05 UTCJul 12, 08:05 UTC1h 0m
2026-07-11 SAZ74 BRN → ZRH Jul 11, 15:40 UTCJul 11, 16:00 UTC20m
2026-07-11 SAZ73 - Jul 11, 13:45 UTCJul 11, 14:55 UTC1h 10m
2026-07-11 SAZ72 - Jul 11, 11:25 UTCJul 11, 12:55 UTC1h 30m
2026-07-11 SAZ71 - Jul 11, 05:20 UTCJul 11, 07:40 UTC2h 20m
2026-07-10 SAZ76 - Jul 10, 19:30 UTCJul 10, 20:50 UTC1h 20m
2026-07-10 SAZ75 - Jul 10, 17:45 UTCJul 10, 18:50 UTC1h 5m
2026-07-10 SAZ74 OBF → ZRH Jul 10, 15:55 UTCJul 10, 16:30 UTC35m
2026-07-10 SAZ73 LUG → OBF Jul 10, 11:50 UTCJul 10, 12:25 UTC35m
2026-07-10 SAZ72 - Jul 10, 09:00 UTCJul 10, 09:45 UTC45m
2026-07-10 SAZ71 ZRH → CEQ Jul 10, 05:35 UTCJul 10, 06:30 UTC55m
2026-07-09 SAZ73 BRN → ZRH Jul 9, 16:10 UTCJul 9, 16:30 UTC20m
2026-07-09 SAZ72 OSL → BRN Jul 9, 13:10 UTCJul 9, 15:10 UTC2h 0m
2026-07-09 SAZ71 ZRH → OSL Jul 9, 07:05 UTCJul 9, 09:15 UTC2h 10m
2026-07-08 SAZ74 - Jul 8, 19:55 UTCJul 8, 20:30 UTC35m
2026-07-08 SAZ73 - Jul 8, 16:35 UTCJul 8, 17:05 UTC30m
2026-07-08 SAZ72 ZRH → ZRH Jul 8, 05:35 UTCJul 8, 15:30 UTC9h 55m
2026-07-07 SAZ72 - Jul 7, 08:50 UTCJul 7, 10:15 UTC1h 25m
2026-07-07 SAZ71 - Jul 7, 06:55 UTCJul 7, 08:05 UTC1h 10m
2026-07-06 SAZ74 - Jul 6, 16:20 UTCJul 6, 16:30 UTC10m
2026-07-06 SAZ74 - Jul 6, 15:45 UTCJul 6, 16:15 UTC30m
2026-07-06 SAZ73 - Jul 6, 12:15 UTCJul 6, 13:05 UTC50m
2026-07-06 SAZ72 - Jul 6, 10:20 UTCJul 6, 11:20 UTC1h 0m
2026-07-06 SAZ71 ZRH → ALC Jul 6, 05:55 UTCJul 6, 07:50 UTC1h 55m
2026-07-05 SAZ74 - Jul 5, 18:15 UTCJul 5, 20:30 UTC2h 15m
2026-07-05 SAZ73 - Jul 5, 14:00 UTCJul 5, 16:10 UTC2h 10m
2026-07-05 SAZ72 - Jul 5, 09:55 UTCJul 5, 12:15 UTC2h 20m
2026-07-05 SAZ71 - Jul 5, 06:00 UTCJul 5, 08:10 UTC2h 10m
2026-07-04 SAZ76 ZRH → ZRH Jul 4, 13:45 UTCJul 4, 17:20 UTC3h 35m
2026-07-04 SAZ74 GVA → ZRH Jul 4, 11:25 UTCJul 4, 12:05 UTC40m
2026-07-04 SAZ73 - Jul 4, 09:10 UTCJul 4, 10:50 UTC1h 40m
2026-07-04 SAZ72 - Jul 4, 07:55 UTCJul 4, 08:30 UTC35m
2026-07-04 SAZ71 - Jul 4, 05:20 UTCJul 4, 06:55 UTC1h 35m
2026-07-03 SAZ75 - Jul 3, 18:50 UTCJul 3, 19:45 UTC55m
2026-07-03 SAZ74 - Jul 3, 16:30 UTCJul 3, 17:20 UTC50m
2026-07-03 SAZ73 - Jul 3, 15:30 UTCJul 3, 15:45 UTC15m
2026-07-03 SAZ72 NCE → BSL Jul 3, 14:05 UTCJul 3, 14:50 UTC45m
2026-07-03 SAZ71 ZRH → NCE Jul 3, 07:50 UTCJul 3, 08:35 UTC45m
2026-07-02 SAZ73 BRN → ZRH Jul 2, 12:55 UTCJul 2, 13:15 UTC20m
2026-07-02 SAZ72 - Jul 2, 09:40 UTCJul 2, 12:20 UTC2h 40m
2026-07-02 SAZ71 - Jul 2, 06:35 UTCJul 2, 08:55 UTC2h 20m

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

Mode-S 4B1A02 frequently asked

What is Mode-S code 4B1A02?
4B1A02 is an ICAO 24-bit transponder address. Allocated to Switzerland. Assigned to HB-JWC.
Where is Mode-S 4B1A02 registered?
Mode-S code 4B1A02 is allocated to Switzerland (CH). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 4B1A02 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 4B1A02, octal 22615002, decimal 4,921,858.
What flights does 4B1A02 operate?
Mode-S 4B1A02 has broadcast 12 distinct callsigns, including SAZ71, SAZ72, SAZ73, SAZ74, SAZ75.