Apparatus

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sensors Mode-S transponder

A6ABF1

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N529SD · CESSNA T206 Turbo Stationair · operated by REAL PROPERTY STRATEGIES LLC, BLACKPOOL HOLDINGS LLC, MACSOWN INC, WEST COAST PROPERTY LLC

Hex
A6ABF1
Octal
51525761
Decimal
10,922,993
Country
US
Tail
N529SD
Type
T206
No current signal · last broadcast Jul 25, 22:40 UTC
Flights observed
41
Distinct callsigns
1
Country
US
Last broadcast
Jul 25, 22:40 UTC

Last known position

Most recent position reported by Mode-S A6ABF1.

Country allocation

The ICAO 24-bit address A6ABF1 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
N529SD - 41 2026-07-25

Recent flights last 41

DateFlightRouteTakeoffLandingDuration
2026-07-25 N529SD - Jul 25, 22:10 UTCJul 25, 22:35 UTC25m
2026-07-25 N529SD - Jul 25, 20:00 UTCJul 25, 20:15 UTC15m
2026-07-12 N529SD PAO → SJC Jul 12, 21:05 UTCJul 12, 21:15 UTC10m
2026-07-12 N529SD - Jul 12, 18:50 UTCJul 12, 19:55 UTC1h 5m
2026-07-12 N529SD - Jul 12, 18:15 UTCJul 12, 18:40 UTC25m
2026-07-10 N529SD - Jul 10, 19:00 UTCJul 10, 20:05 UTC1h 5m
2026-07-10 N529SD - Jul 10, 18:25 UTCJul 10, 18:50 UTC25m
2026-07-09 N529SD - Jul 9, 23:15 UTCJul 9, 23:50 UTC35m
2026-07-09 N529SD - Jul 9, 21:35 UTCJul 9, 22:35 UTC1h 0m
2026-07-09 N529SD - Jul 9, 01:45 UTCJul 9, 02:20 UTC35m
2026-07-09 N529SD - Jul 9, 00:05 UTCJul 9, 01:10 UTC1h 5m
2026-07-06 N529SD - Jul 6, 23:05 UTCJul 6, 23:15 UTC10m
2026-07-06 N529SD - Jul 6, 21:55 UTCJul 6, 22:35 UTC40m
2026-07-06 N529SD SJC → PAO Jul 6, 21:15 UTCJul 6, 21:20 UTC5m
2026-07-05 N529SD - Jul 5, 19:15 UTCJul 5, 20:05 UTC50m
2026-07-05 N529SD - Jul 5, 17:50 UTCJul 5, 18:40 UTC50m
2026-07-02 N529SD - Jul 2, 18:55 UTCJul 2, 19:35 UTC40m
2026-07-02 N529SD - Jul 2, 17:55 UTCJul 2, 18:10 UTC15m
2026-07-02 N529SD - Jul 2, 17:20 UTCJul 2, 17:50 UTC30m
2026-06-29 N529SD PAO → SJC Jun 29, 20:44 UTCJun 29, 20:59 UTC15m
2026-06-29 N529SD - Jun 29, 17:49 UTCJun 29, 19:09 UTC1h 20m
2026-06-29 N529SD - Jun 29, 17:05 UTCJun 29, 17:34 UTC30m
2026-06-23 N529SD - Jun 23, 22:40 UTCJun 23, 23:00 UTC20m
2026-06-23 N529SD - Jun 23, 21:10 UTCJun 23, 22:10 UTC1h 0m
2026-06-23 N529SD - Jun 23, 20:29 UTCJun 23, 20:59 UTC30m
2026-06-16 N529SD - Jun 16, 23:35 UTCJun 17, 00:00 UTC25m
2026-06-16 N529SD - Jun 16, 22:25 UTCJun 16, 23:05 UTC40m
2026-06-16 N529SD - Jun 16, 21:45 UTCJun 16, 22:20 UTC35m
2026-06-07 N529SD - Jun 7, 18:25 UTCJun 7, 19:35 UTC1h 10m
2026-06-05 N529SD SJC → SBP Jun 5, 22:20 UTCJun 5, 23:30 UTC1h 10m
2026-06-04 N529SD - Jun 4, 19:00 UTCJun 4, 19:25 UTC25m
2026-06-04 N529SD - Jun 4, 17:45 UTCJun 4, 18:20 UTC35m
2026-06-02 N529SD SJC → SJC Jun 2, 18:20 UTCJun 2, 19:20 UTC1h 0m
2026-06-01 N529SD - Jun 1, 18:05 UTCJun 1, 18:25 UTC20m
2026-06-01 N529SD - Jun 1, 17:25 UTCJun 1, 17:35 UTC10m
2026-06-01 N529SD - Jun 1, 16:45 UTCJun 1, 17:10 UTC25m
2026-05-29 N529SD - May 29, 22:05 UTCMay 29, 22:45 UTC40m
2026-05-29 N529SD - May 29, 20:45 UTCMay 29, 21:25 UTC40m
2026-04-17 N529SD - Apr 17, 19:25 UTCApr 17, 19:35 UTC10m
2026-04-17 N529SD - Apr 17, 19:00 UTCApr 17, 19:20 UTC20m
2026-04-17 N529SD - Apr 17, 17:30 UTCApr 17, 18:30 UTC1h 0m

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 N529SD page for operator, model, and routing details .

Mode-S A6ABF1 frequently asked

What is Mode-S code A6ABF1?
A6ABF1 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N529SD.
Where is Mode-S A6ABF1 registered?
Mode-S code A6ABF1 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 A6ABF1 broadcasting right now?
No active broadcast right now. Last signal was Jul 25, 22:40 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A6ABF1, octal 51525761, decimal 10,922,993.
What flights does A6ABF1 operate?
Mode-S A6ABF1 has broadcast 1 distinct callsign, including N529SD.