Apparatus

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sensors Mode-S transponder

4B1BC7

ICAO 24-bit transponder address · allocated to Switzerland

Currently assigned to HB-KNN · TECNAM P-2008

Hex
4B1BC7
Octal
22615707
Decimal
4,922,311
Country
CH
Tail
HB-KNN
Type
P208
No current signal · last broadcast Jul 21, 14:40 UTC
Flights observed
281
Distinct callsigns
1
Country
CH
Last broadcast
Jul 21, 14:40 UTC

Last known position

Most recent position reported by Mode-S 4B1BC7.

Country allocation

The ICAO 24-bit address 4B1BC7 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
HBKNN - 281 2026-07-21

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-21 HBKNN - Jul 21, 13:35 UTCJul 21, 14:35 UTC1h 0m
2026-07-21 HBKNN - Jul 21, 12:15 UTCJul 21, 12:45 UTC30m
2026-07-21 HBKNN - Jul 21, 08:35 UTCJul 21, 08:55 UTC20m
2026-07-21 HBKNN - Jul 21, 07:50 UTCJul 21, 08:20 UTC30m
2026-07-20 HBKNN - Jul 20, 15:10 UTCJul 20, 15:45 UTC35m
2026-07-20 HBKNN - Jul 20, 12:50 UTCJul 20, 13:40 UTC50m
2026-07-20 HBKNN - Jul 20, 07:40 UTCJul 20, 08:10 UTC30m
2026-07-19 HBKNN - Jul 19, 14:55 UTCJul 19, 17:45 UTC2h 50m
2026-07-19 HBKNN - Jul 19, 12:15 UTCJul 19, 12:30 UTC15m
2026-07-19 HBKNN - Jul 19, 10:15 UTCJul 19, 10:45 UTC30m
2026-07-19 HBKNN - Jul 19, 07:25 UTCJul 19, 09:30 UTC2h 5m
2026-07-18 HBKNN - Jul 18, 14:50 UTCJul 18, 15:55 UTC1h 5m
2026-07-18 HBKNN - Jul 18, 13:10 UTCJul 18, 13:35 UTC25m
2026-07-18 HBKNN - Jul 18, 12:35 UTCJul 18, 13:05 UTC30m
2026-07-18 HBKNN - Jul 18, 07:35 UTCJul 18, 10:45 UTC3h 10m
2026-07-17 HBKNN - Jul 17, 12:40 UTCJul 17, 13:15 UTC35m
2026-07-17 HBKNN - Jul 17, 09:15 UTCJul 17, 09:25 UTC10m
2026-07-17 HBKNN - Jul 17, 08:10 UTCJul 17, 08:20 UTC10m
2026-07-16 HBKNN - Jul 16, 11:40 UTCJul 16, 12:25 UTC45m
2026-07-16 HBKNN - Jul 16, 09:20 UTCJul 16, 09:55 UTC35m
2026-07-16 HBKNN - Jul 16, 08:10 UTCJul 16, 08:50 UTC40m
2026-07-16 HBKNN - Jul 16, 06:55 UTCJul 16, 08:00 UTC1h 5m
2026-07-15 HBKNN - Jul 15, 15:15 UTCJul 15, 15:30 UTC15m
2026-07-15 HBKNN - Jul 15, 12:00 UTCJul 15, 12:25 UTC25m
2026-07-15 HBKNN - Jul 15, 09:25 UTCJul 15, 10:00 UTC35m
2026-07-15 HBKNN - Jul 15, 08:00 UTCJul 15, 08:25 UTC25m
2026-07-15 HBKNN - Jul 15, 06:35 UTCJul 15, 07:10 UTC35m
2026-07-13 HBKNN - Jul 13, 08:20 UTCJul 13, 09:10 UTC50m
2026-07-13 HBKNN - Jul 13, 07:05 UTCJul 13, 07:50 UTC45m
2026-07-12 HBKNN - Jul 12, 15:30 UTCJul 12, 16:30 UTC1h 0m
2026-07-12 HBKNN - Jul 12, 13:50 UTCJul 12, 15:01 UTC1h 10m
2026-07-12 HBKNN - Jul 12, 09:45 UTCJul 12, 12:35 UTC2h 50m
2026-07-12 HBKNN - Jul 12, 07:55 UTCJul 12, 08:35 UTC40m
2026-07-11 HBKNN - Jul 11, 12:05 UTCJul 11, 14:35 UTC2h 30m
2026-07-11 HBKNN - Jul 11, 09:45 UTCJul 11, 11:05 UTC1h 20m
2026-07-11 HBKNN - Jul 11, 07:25 UTCJul 11, 09:00 UTC1h 35m
2026-07-10 HBKNN - Jul 10, 13:35 UTCJul 10, 14:35 UTC1h 0m
2026-07-10 HBKNN - Jul 10, 11:55 UTCJul 10, 12:30 UTC35m
2026-07-10 HBKNN - Jul 10, 07:05 UTCJul 10, 07:25 UTC20m
2026-07-09 HBKNN - Jul 9, 16:50 UTCJul 9, 17:15 UTC25m
2026-07-09 HBKNN - Jul 9, 14:25 UTCJul 9, 14:55 UTC30m
2026-07-09 HBKNN - Jul 9, 11:20 UTCJul 9, 11:35 UTC15m
2026-07-09 HBKNN - Jul 9, 08:05 UTCJul 9, 09:05 UTC1h 0m
2026-07-08 HBKNN - Jul 8, 12:50 UTCJul 8, 14:45 UTC1h 55m
2026-07-04 HBKNN - Jul 4, 16:25 UTCJul 4, 16:55 UTC30m
2026-07-04 HBKNN - Jul 4, 15:25 UTCJul 4, 16:15 UTC50m
2026-07-04 HBKNN - Jul 4, 13:25 UTCJul 4, 14:50 UTC1h 25m
2026-07-04 HBKNN - Jul 4, 12:15 UTCJul 4, 12:50 UTC35m
2026-07-04 HBKNN - Jul 4, 10:10 UTCJul 4, 11:35 UTC1h 25m
2026-07-04 HBKNN - Jul 4, 09:10 UTCJul 4, 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-KNN page for operator, model, and routing details .

Mode-S 4B1BC7 frequently asked

What is Mode-S code 4B1BC7?
4B1BC7 is an ICAO 24-bit transponder address. Allocated to Switzerland. Assigned to HB-KNN.
Where is Mode-S 4B1BC7 registered?
Mode-S code 4B1BC7 is allocated to Switzerland (CH). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 4B1BC7 broadcasting right now?
No active broadcast right now. Last signal was Jul 21, 14:40 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 4B1BC7, octal 22615707, decimal 4,922,311.
What flights does 4B1BC7 operate?
Mode-S 4B1BC7 has broadcast 1 distinct callsign, including HBKNN.