Apparatus

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sensors Mode-S transponder

4B1856

ICAO 24-bit transponder address · allocated to Switzerland

Currently assigned to HB-JFQ · DASSAULT Falcon 7X

Hex
4B1856
Octal
22614126
Decimal
4,921,430
Country
CH
Tail
HB-JFQ
Type
FA7X
No current signal · last broadcast 6d ago
Flights observed
60
Distinct callsigns
1
Country
CH
Last broadcast
6d ago

Last known position

Most recent position reported by Mode-S 4B1856.

Country allocation

The ICAO 24-bit address 4B1856 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
HBJFQ - 60 2026-07-25

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-25 HBJFQ - Jul 25, 21:05 UTCJul 26, 04:35 UTC7h 30m
2026-07-25 HBJFQ BED → PIT Jul 25, 00:10 UTCJul 25, 01:30 UTC1h 20m
2026-07-23 HBJFQ LGA → BED Jul 23, 23:10 UTCJul 23, 23:50 UTC40m
2026-07-23 HBJFQ MDW → LGA Jul 23, 13:45 UTCJul 23, 15:15 UTC1h 30m
2026-07-22 HBJFQ LGA → MDW Jul 22, 23:00 UTCJul 23, 00:55 UTC1h 55m
2026-07-22 HBJFQ BED → LGA Jul 22, 21:30 UTCJul 22, 22:10 UTC40m
2026-07-22 HBJFQ - Jul 22, 17:30 UTCJul 22, 19:20 UTC1h 50m
2026-07-22 HBJFQ - Jul 22, 14:35 UTCJul 22, 16:20 UTC1h 45m
2026-07-21 HBJFQ - Jul 21, 15:50 UTCJul 21, 16:40 UTC50m
2026-07-20 HBJFQ - Jul 20, 18:10 UTCJul 20, 18:45 UTC35m
2026-07-19 HBJFQ - Jul 19, 19:00 UTCJul 19, 19:50 UTC50m
2026-07-19 HBJFQ - Jul 19, 16:50 UTCJul 19, 18:15 UTC1h 25m
2026-07-19 HBJFQ - Jul 19, 15:50 UTCJul 19, 16:10 UTC20m
2026-07-17 HBJFQ - Jul 17, 16:04 UTCJul 17, 18:05 UTC2h 0m
2026-07-14 HBJFQ - Jul 14, 19:35 UTCJul 14, 20:25 UTC50m
2026-07-13 HBJFQ BED → MMU Jul 13, 12:10 UTCJul 13, 12:55 UTC45m
2026-07-12 HBJFQ - Jul 12, 19:45 UTCJul 12, 20:25 UTC40m
2026-07-10 HBJFQ CMH → MMU Jul 10, 20:20 UTCJul 10, 21:25 UTC1h 5m
2026-07-10 HBJFQ - Jul 10, 18:55 UTCJul 10, 19:45 UTC50m
2026-07-10 HBJFQ - Jul 10, 10:55 UTCJul 10, 11:45 UTC50m
2026-07-10 HBJFQ - Jul 10, 09:15 UTCJul 10, 10:15 UTC1h 0m
2026-07-09 HBJFQ - Jul 9, 19:10 UTCJul 9, 20:30 UTC1h 20m
2026-07-05 HBJFQ - Jul 5, 20:25 UTCJul 5, 21:05 UTC40m
2026-07-05 HBJFQ - Jul 5, 19:15 UTCJul 5, 19:45 UTC30m
2026-07-05 HBJFQ - Jul 5, 18:10 UTCJul 5, 19:10 UTC1h 0m
2026-07-03 HBJFQ - Jul 3, 20:25 UTCJul 3, 22:00 UTC1h 35m
2026-07-02 HBJFQ - Jul 2, 18:05 UTCJul 2, 23:15 UTC5h 10m
2026-07-02 HBJFQ - Jul 2, 11:05 UTCJul 2, 16:25 UTC5h 20m
2026-07-01 HBJFQ - Jul 1, 20:20 UTCJul 1, 21:25 UTC1h 5m
2026-06-30 HBJFQ - Jun 30, 21:45 UTCJun 30, 22:55 UTC1h 10m
2026-06-30 HBJFQ - Jun 30, 15:45 UTCJun 30, 20:35 UTC4h 50m
2026-06-28 HBJFQ - Jun 28, 16:19 UTCJun 29, 03:39 UTC11h 20m
2026-06-18 HBJFQ - Jun 18, 21:00 UTCJun 19, 04:10 UTC7h 9m
2026-06-17 HBJFQ ZRH → MMU Jun 17, 19:05 UTCJun 18, 03:10 UTC8h 5m
2026-06-17 HBJFQ BCN → ZRH Jun 17, 16:50 UTCJun 17, 18:10 UTC1h 20m
2026-06-15 HBJFQ - Jun 15, 23:15 UTCJun 16, 06:30 UTC7h 15m
2026-06-12 HBJFQ - Jun 12, 01:20 UTCJun 12, 02:00 UTC40m
2026-06-11 HBJFQ - Jun 11, 16:55 UTCJun 12, 00:45 UTC7h 51m
2026-06-07 HBJFQ - Jun 7, 03:05 UTCJun 7, 09:40 UTC6h 35m
2026-05-28 HBJFQ - May 28, 17:05 UTCMay 29, 00:50 UTC7h 45m
2026-05-28 HBJFQ - May 28, 00:05 UTCMay 28, 07:30 UTC7h 25m
2026-05-21 HBJFQ IAD → MMU May 21, 10:10 UTCMay 21, 10:55 UTC45m
2026-05-20 HBJFQ - May 20, 00:10 UTCMay 20, 00:50 UTC40m
2026-05-17 HBJFQ - May 17, 23:05 UTCMay 17, 23:50 UTC45m
2026-05-17 HBJFQ - May 17, 21:05 UTCMay 17, 21:50 UTC45m
2026-05-15 HBJFQ - May 15, 00:15 UTCMay 15, 01:00 UTC45m
2026-05-14 HBJFQ LGA → BED May 14, 23:00 UTCMay 14, 23:40 UTC40m
2026-05-13 HBJFQ - May 13, 19:05 UTCMay 13, 19:55 UTC50m
2026-05-13 HBJFQ - May 13, 17:25 UTCMay 13, 18:00 UTC35m
2026-05-08 HBJFQ - May 8, 20:35 UTCMay 8, 21:20 UTC45m

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

Mode-S 4B1856 frequently asked

What is Mode-S code 4B1856?
4B1856 is an ICAO 24-bit transponder address. Allocated to Switzerland. Assigned to HB-JFQ.
Where is Mode-S 4B1856 registered?
Mode-S code 4B1856 is allocated to Switzerland (CH). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 4B1856 broadcasting right now?
No active broadcast right now. Last signal was 6d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 4B1856, octal 22614126, decimal 4,921,430.
What flights does 4B1856 operate?
Mode-S 4B1856 has broadcast 1 distinct callsign, including HBJFQ.