Apparatus

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sensors Mode-S transponder

A0D81F

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N1533K · LUSCOMBE 8 · operated by HANCHECK PAUL C

Hex
A0D81F
Octal
50154037
Decimal
10,541,087
Country
US
Tail
N1533K
Type
L8
No current signal · last broadcast Jul 12, 17:15 UTC
Flights observed
23
Distinct callsigns
1
Country
US
Last broadcast
Jul 12, 17:15 UTC

Last known position

Most recent position reported by Mode-S A0D81F.

Country allocation

The ICAO 24-bit address A0D81F 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
N1533K - 23 2026-07-12

Recent flights last 23

DateFlightRouteTakeoffLandingDuration
2026-07-12 N1533K - Jul 12, 17:01 UTCJul 12, 17:15 UTC15m
2026-07-12 N1533K - Jul 12, 15:55 UTCJul 12, 16:25 UTC30m
2026-07-12 N1533K - Jul 12, 13:30 UTCJul 12, 15:20 UTC1h 50m
2026-07-12 N1533K - Jul 12, 11:40 UTCJul 12, 11:55 UTC15m
2026-07-11 N1533K - Jul 11, 19:40 UTCJul 11, 19:55 UTC15m
2026-07-11 N1533K - Jul 11, 10:45 UTCJul 11, 11:05 UTC20m
2026-07-01 N1533K - Jul 1, 00:55 UTCJul 1, 01:20 UTC25m
2026-06-20 N1533K - Jun 20, 15:34 UTCJun 20, 16:59 UTC1h 25m
2026-06-20 N1533K - Jun 20, 13:04 UTCJun 20, 13:14 UTC10m
2026-06-20 N1533K - Jun 20, 11:09 UTCJun 20, 11:30 UTC20m
2026-06-13 N1533K - Jun 13, 19:30 UTCJun 13, 20:55 UTC1h 25m
2026-06-13 N1533K - Jun 13, 11:40 UTCJun 13, 13:00 UTC1h 20m
2026-06-07 N1533K - Jun 7, 23:30 UTCJun 8, 00:15 UTC45m
2026-05-31 N1533K - May 31, 17:45 UTCMay 31, 18:35 UTC50m
2026-05-31 N1533K - May 31, 14:55 UTCMay 31, 15:30 UTC35m
2026-05-30 N1533K - May 30, 14:35 UTCMay 30, 14:50 UTC15m
2026-05-30 N1533K - May 30, 12:00 UTCMay 30, 12:15 UTC15m
2026-05-26 N1533K - May 26, 21:00 UTCMay 26, 21:29 UTC30m
2026-05-17 N1533K - May 17, 14:25 UTCMay 17, 15:05 UTC40m
2026-05-10 N1533K - May 10, 11:35 UTCMay 10, 12:25 UTC50m
2026-05-03 N1533K - May 3, 14:55 UTCMay 3, 15:25 UTC30m
2026-05-03 N1533K - May 3, 11:55 UTCMay 3, 12:25 UTC30m
2026-04-26 N1533K - Apr 26, 22:25 UTCApr 26, 23:40 UTC1h 15m

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 N1533K page for operator, model, and routing details .

Mode-S A0D81F frequently asked

What is Mode-S code A0D81F?
A0D81F is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N1533K.
Where is Mode-S A0D81F registered?
Mode-S code A0D81F 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 A0D81F broadcasting right now?
No active broadcast right now. Last signal was Jul 12, 17:15 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A0D81F, octal 50154037, decimal 10,541,087.
What flights does A0D81F operate?
Mode-S A0D81F has broadcast 1 distinct callsign, including N1533K.