Apparatus

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sensors Mode-S transponder

32B405

ICAO 24-bit transponder address · allocated to Italy

Hex
32B405
Octal
14532005
Decimal
3,322,885
Country
IT
Broadcasting now · callsign KAYI0005 · 16,000 ft
Flights observed
4
Distinct callsigns
2
Country
IT
Last broadcast
10d ago

Current position

32B405 is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address 32B405 falls within the block assigned to Italy (IT) by ICAO Annex 10, Volume III. Every aircraft registered in Italy 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 2 distinct

Callsign Airline Flights Last seen
KAYI0003 - 3 2026-04-17
KAYI0002 - 1 2026-05-05

Recent flights last 4

DateFlightRouteTakeoffLandingDuration
2026-05-05 KAYI0002 - May 5, 11:40 UTCMay 5, 15:05 UTC3h 25m
2026-04-17 KAYI0003 - Apr 17, 15:20 UTCApr 17, 16:40 UTC1h 20m
2026-04-17 KAYI0003 - Apr 17, 13:20 UTCApr 17, 15:15 UTC1h 54m
2026-04-17 KAYI0003 - Apr 17, 11:25 UTCApr 17, 13:15 UTC1h 50m

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.

Mode-S 32B405 frequently asked

What is Mode-S code 32B405?
32B405 is an ICAO 24-bit transponder address. Allocated to Italy.
Where is Mode-S 32B405 registered?
Mode-S code 32B405 is allocated to Italy (IT). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 32B405 broadcasting right now?
Yes. Mode-S 32B405 is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 32B405, octal 14532005, decimal 3,322,885.
What flights does 32B405 operate?
Mode-S 32B405 has broadcast 2 distinct callsigns, including KAYI0003, KAYI0002.