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sensors Mode-S transponder

4B4072

ICAO 24-bit transponder address · allocated to Switzerland

Currently assigned to HB-YKO · GLASAIR SH-4 GlaStar

Hex
4B4072
Octal
22640162
Decimal
4,931,698
Country
CH
Tail
HB-YKO
Type
GLST
No current signal · last broadcast 14h ago
Flights observed
37
Distinct callsigns
1
Country
CH
Last broadcast
14h ago

Last known position

Most recent position reported by Mode-S 4B4072.

Country allocation

The ICAO 24-bit address 4B4072 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
HBYKO - 37 2026-05-29

Recent flights last 37

DateFlightRouteTakeoffLandingDuration
2026-05-29 HBYKO - May 29, 17:00 UTCMay 29, 17:30 UTC30m
2026-05-28 HBYKO - May 28, 15:05 UTCMay 28, 15:45 UTC40m
2026-05-28 HBYKO - May 28, 10:25 UTCMay 28, 11:15 UTC50m
2026-05-26 HBYKO - May 26, 17:04 UTCMay 26, 17:50 UTC45m
2026-05-25 HBYKO - May 25, 13:55 UTCMay 25, 14:35 UTC40m
2026-05-25 HBYKO - May 25, 13:00 UTCMay 25, 13:20 UTC20m
2026-05-25 HBYKO - May 25, 12:15 UTCMay 25, 12:25 UTC10m
2026-05-24 HBYKO - May 24, 15:20 UTCMay 24, 15:45 UTC25m
2026-05-24 HBYKO - May 24, 09:15 UTCMay 24, 09:25 UTC10m
2026-05-23 HBYKO - May 23, 15:35 UTCMay 23, 17:10 UTC1h 35m
2026-05-23 HBYKO - May 23, 14:40 UTCMay 23, 15:05 UTC25m
2026-05-23 HBYKO - May 23, 13:35 UTCMay 23, 13:50 UTC15m
2026-05-23 HBYKO - May 23, 07:25 UTCMay 23, 07:35 UTC10m
2026-05-22 HBYKO - May 22, 05:30 UTCMay 22, 05:40 UTC10m
2026-05-21 HBYKO - May 21, 07:10 UTCMay 21, 07:20 UTC10m
2026-05-19 HBYKO - May 19, 13:45 UTCMay 19, 13:55 UTC10m
2026-05-19 HBYKO - May 19, 11:10 UTCMay 19, 11:50 UTC40m
2026-05-19 HBYKO - May 19, 10:05 UTCMay 19, 10:35 UTC30m
2026-05-19 HBYKO - May 19, 09:20 UTCMay 19, 09:35 UTC15m
2026-05-18 HBYKO - May 18, 10:10 UTCMay 18, 11:05 UTC55m
2026-05-17 HBYKO - May 17, 09:35 UTCMay 17, 11:20 UTC1h 45m
2026-05-16 HBYKO - May 16, 06:25 UTCMay 16, 09:51 UTC3h 25m
2026-05-13 HBYKO - May 13, 16:10 UTCMay 13, 16:45 UTC35m
2026-05-13 HBYKO - May 13, 14:51 UTCMay 13, 15:35 UTC45m
2026-05-09 HBYKO - May 9, 06:00 UTCMay 9, 06:10 UTC10m
2026-05-03 HBYKO - May 3, 14:40 UTCMay 3, 14:55 UTC15m
2026-05-01 HBYKO - May 1, 16:55 UTCMay 1, 17:10 UTC15m
2026-04-29 HBYKO - Apr 29, 17:15 UTCApr 29, 17:25 UTC10m
2026-04-25 HBYKO - Apr 25, 15:55 UTCApr 25, 16:35 UTC40m
2026-04-21 HBYKO - Apr 21, 06:05 UTCApr 21, 06:35 UTC30m
2026-04-18 HBYKO - Apr 18, 07:05 UTCApr 18, 07:20 UTC15m
2026-04-17 HBYKO - Apr 17, 10:20 UTCApr 17, 10:45 UTC25m
2026-04-17 HBYKO - Apr 17, 09:20 UTCApr 17, 09:45 UTC25m
2026-04-17 HBYKO - Apr 17, 08:40 UTCApr 17, 09:15 UTC35m
2026-04-15 HBYKO - Apr 15, 11:15 UTCApr 15, 11:40 UTC25m
2026-04-15 HBYKO - Apr 15, 09:45 UTCApr 15, 10:45 UTC1h 1m
2026-04-14 HBYKO - Apr 14, 07:40 UTCApr 14, 08:45 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-YKO page for operator, model, and routing details .

Mode-S 4B4072 frequently asked

What is Mode-S code 4B4072?
4B4072 is an ICAO 24-bit transponder address. Allocated to Switzerland. Assigned to HB-YKO.
Where is Mode-S 4B4072 registered?
Mode-S code 4B4072 is allocated to Switzerland (CH). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 4B4072 broadcasting right now?
No active broadcast right now. Last signal was 14h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 4B4072, octal 22640162, decimal 4,931,698.
What flights does 4B4072 operate?
Mode-S 4B4072 has broadcast 1 distinct callsign, including HBYKO.