Apparatus

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sensors Mode-S transponder

A52F25

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N433KA · operated by NUN-YUH BUSINESS LLC

Hex
A52F25
Octal
51227445
Decimal
10,825,509
Country
US
Tail
N433KA
Type
SR20
No current signal · last broadcast 19h ago
Flights observed
35
Distinct callsigns
1
Country
US
Last broadcast
19h ago

Last known position

Most recent position reported by Mode-S A52F25.

Country allocation

The ICAO 24-bit address A52F25 falls within the block assigned to United States (US) by ICAO Annex 10, Volume III. Every aircraft registered in United States 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
N433KA - 35 2026-07-13

Recent flights last 35

DateFlightRouteTakeoffLandingDuration
2026-07-13 N433KA - Jul 13, 17:25 UTCJul 13, 19:00 UTC1h 35m
2026-07-13 N433KA - Jul 13, 15:50 UTCJul 13, 16:20 UTC30m
2026-07-09 N433KA - Jul 9, 15:50 UTCJul 9, 17:10 UTC1h 20m
2026-07-04 N433KA - Jul 4, 19:45 UTCJul 4, 21:20 UTC1h 35m
2026-07-01 N433KA - Jul 1, 16:50 UTCJul 1, 17:00 UTC10m
2026-07-01 N433KA - Jul 1, 15:50 UTCJul 1, 16:10 UTC20m
2026-06-25 N433KA - Jun 25, 18:10 UTCJun 25, 18:19 UTC10m
2026-06-25 N433KA - Jun 25, 16:14 UTCJun 25, 16:29 UTC15m
2026-06-22 N433KA - Jun 22, 21:00 UTCJun 22, 21:40 UTC40m
2026-06-21 N433KA - Jun 21, 00:10 UTCJun 21, 02:04 UTC1h 55m
2026-06-20 N433KA - Jun 20, 20:29 UTCJun 20, 21:10 UTC40m
2026-06-20 N433KA - Jun 20, 01:05 UTCJun 20, 01:34 UTC30m
2026-06-14 N433KA - Jun 14, 21:50 UTCJun 14, 22:10 UTC20m
2026-06-14 N433KA - Jun 14, 20:45 UTCJun 14, 21:05 UTC20m
2026-06-13 N433KA - Jun 13, 23:35 UTCJun 14, 00:10 UTC35m
2026-06-13 N433KA - Jun 13, 22:30 UTCJun 13, 23:00 UTC30m
2026-06-13 N433KA - Jun 13, 14:30 UTCJun 13, 15:05 UTC35m
2026-06-07 N433KA - Jun 7, 16:45 UTCJun 7, 17:30 UTC45m
2026-06-04 N433KA - Jun 4, 18:00 UTCJun 4, 18:15 UTC15m
2026-06-04 N433KA - Jun 4, 16:45 UTCJun 4, 17:20 UTC35m
2026-05-23 N433KA - May 23, 17:25 UTCMay 23, 17:40 UTC15m
2026-05-23 N433KA - May 23, 16:15 UTCMay 23, 16:40 UTC25m
2026-05-05 N433KA - May 5, 02:20 UTCMay 5, 03:05 UTC45m
2026-05-02 N433KA - May 2, 01:50 UTCMay 2, 02:00 UTC10m
2026-05-01 N433KA - May 1, 21:55 UTCMay 1, 22:30 UTC35m
2026-05-01 N433KA - May 1, 21:00 UTCMay 1, 21:15 UTC15m
2026-04-29 N433KA - Apr 29, 19:35 UTCApr 29, 20:35 UTC1h 0m
2026-04-29 N433KA - Apr 29, 15:35 UTCApr 29, 16:00 UTC25m
2026-04-28 N433KA - Apr 28, 20:00 UTCApr 28, 21:30 UTC1h 30m
2026-04-28 N433KA - Apr 28, 17:55 UTCApr 28, 18:05 UTC10m
2026-04-28 N433KA - Apr 28, 16:00 UTCApr 28, 16:40 UTC40m
2026-04-19 N433KA - Apr 19, 20:45 UTCApr 19, 21:15 UTC30m
2026-04-19 N433KA - Apr 19, 20:00 UTCApr 19, 20:15 UTC15m
2026-04-18 N433KA - Apr 18, 01:25 UTCApr 18, 02:15 UTC50m
2026-04-18 N433KA - Apr 18, 00:45 UTCApr 18, 01:20 UTC35m

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 N433KA page for operator, model, and routing details .

Mode-S A52F25 frequently asked

What is Mode-S code A52F25?
A52F25 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N433KA.
Where is Mode-S A52F25 registered?
Mode-S code A52F25 is allocated to United States (US). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is A52F25 broadcasting right now?
No active broadcast right now. Last signal was 19h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A52F25, octal 51227445, decimal 10,825,509.
What flights does A52F25 operate?
Mode-S A52F25 has broadcast 1 distinct callsign, including N433KA.