Apparatus

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sensors Mode-S transponder

A8A9A3

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N6574D · CESSNA 172 Skyhawk · operated by FLY CAROLINA LLC

Hex
A8A9A3
Octal
52124643
Decimal
11,053,475
Country
US
Tail
N6574D
Type
C172
No current signal · last broadcast 4d ago
Flights observed
78
Distinct callsigns
1
Country
US
Last broadcast
4d ago

Last known position

Most recent position reported by Mode-S A8A9A3.

Country allocation

The ICAO 24-bit address A8A9A3 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
N6574D - 78 2026-07-09

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-09 N6574D - Jul 9, 19:05 UTCJul 9, 20:20 UTC1h 15m
2026-07-06 N6574D - Jul 6, 15:45 UTCJul 6, 15:55 UTC10m
2026-07-06 N6574D - Jul 6, 14:55 UTCJul 6, 15:15 UTC20m
2026-07-05 N6574D - Jul 5, 00:50 UTCJul 5, 01:25 UTC35m
2026-07-04 N6574D - Jul 4, 20:00 UTCJul 4, 21:20 UTC1h 20m
2026-07-01 N6574D - Jul 1, 11:55 UTCJul 1, 13:20 UTC1h 25m
2026-06-28 N6574D - Jun 28, 22:59 UTCJun 28, 23:39 UTC40m
2026-06-21 N6574D - Jun 21, 23:24 UTCJun 21, 23:55 UTC30m
2026-06-21 N6574D - Jun 21, 21:49 UTCJun 21, 22:44 UTC55m
2026-06-21 N6574D - Jun 21, 13:20 UTCJun 21, 13:34 UTC15m
2026-06-21 N6574D - Jun 21, 12:35 UTCJun 21, 12:49 UTC15m
2026-06-20 N6574D - Jun 20, 15:34 UTCJun 20, 15:54 UTC20m
2026-06-20 N6574D - Jun 20, 13:29 UTCJun 20, 14:59 UTC1h 30m
2026-06-20 N6574D - Jun 20, 12:34 UTCJun 20, 12:50 UTC15m
2026-06-19 N6574D - Jun 19, 14:15 UTCJun 19, 16:29 UTC2h 15m
2026-06-16 N6574D - Jun 16, 22:35 UTCJun 16, 23:40 UTC1h 5m
2026-06-16 N6574D - Jun 16, 19:45 UTCJun 16, 20:40 UTC56m
2026-06-14 N6574D - Jun 14, 14:00 UTCJun 14, 14:15 UTC15m
2026-06-14 N6574D - Jun 14, 11:20 UTCJun 14, 13:20 UTC2h 0m
2026-06-13 N6574D - Jun 13, 23:25 UTCJun 14, 01:00 UTC1h 35m
2026-06-12 N6574D - Jun 12, 21:30 UTCJun 12, 21:55 UTC25m
2026-06-12 N6574D - Jun 12, 16:00 UTCJun 12, 16:20 UTC20m
2026-06-06 N6574D - Jun 6, 15:19 UTCJun 6, 15:39 UTC20m
2026-06-06 N6574D - Jun 6, 13:44 UTCJun 6, 14:09 UTC25m
2026-06-04 N6574D - Jun 4, 21:35 UTCJun 4, 21:50 UTC15m
2026-06-04 N6574D - Jun 4, 14:40 UTCJun 4, 16:00 UTC1h 20m
2026-06-03 N6574D - Jun 3, 22:45 UTCJun 3, 23:50 UTC1h 5m
2026-06-03 N6574D - Jun 3, 19:55 UTCJun 3, 21:15 UTC1h 20m
2026-06-02 N6574D - Jun 2, 23:55 UTCJun 3, 00:20 UTC25m
2026-06-02 N6574D - Jun 2, 15:55 UTCJun 2, 16:05 UTC10m
2026-06-02 N6574D - Jun 2, 14:30 UTCJun 2, 14:45 UTC15m
2026-05-31 N6574D - May 31, 22:10 UTCMay 31, 23:05 UTC55m
2026-05-31 N6574D - May 31, 17:45 UTCMay 31, 18:30 UTC45m
2026-05-28 N6574D - May 28, 22:55 UTCMay 28, 23:40 UTC45m
2026-05-21 N6574D - May 21, 22:20 UTCMay 21, 23:10 UTC50m
2026-05-21 N6574D - May 21, 18:15 UTCMay 21, 19:05 UTC50m
2026-05-21 N6574D - May 21, 15:30 UTCMay 21, 15:50 UTC20m
2026-05-21 N6574D - May 21, 14:35 UTCMay 21, 14:45 UTC10m
2026-05-19 N6574D - May 19, 23:00 UTCMay 20, 00:25 UTC1h 25m
2026-05-19 N6574D - May 19, 21:15 UTCMay 19, 21:45 UTC30m
2026-05-17 N6574D - May 17, 20:45 UTCMay 17, 21:55 UTC1h 10m
2026-05-16 N6574D - May 16, 21:40 UTCMay 16, 23:00 UTC1h 20m
2026-05-10 N6574D - May 10, 22:25 UTCMay 10, 23:50 UTC1h 25m
2026-05-10 N6574D - May 10, 00:55 UTCMay 10, 01:45 UTC50m
2026-05-09 N6574D - May 9, 23:30 UTCMay 10, 00:05 UTC35m
2026-05-09 N6574D - May 9, 16:25 UTCMay 9, 17:35 UTC1h 10m
2026-05-08 N6574D - May 8, 19:10 UTCMay 8, 20:50 UTC1h 40m
2026-05-05 N6574D - May 5, 21:05 UTCMay 5, 22:50 UTC1h 45m
2026-05-04 N6574D - May 4, 20:35 UTCMay 4, 22:40 UTC2h 5m
2026-05-04 N6574D - May 4, 15:55 UTCMay 4, 16:05 UTC10m

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 N6574D page for operator, model, and routing details .

Mode-S A8A9A3 frequently asked

What is Mode-S code A8A9A3?
A8A9A3 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N6574D.
Where is Mode-S A8A9A3 registered?
Mode-S code A8A9A3 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 A8A9A3 broadcasting right now?
No active broadcast right now. Last signal was 4d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A8A9A3, octal 52124643, decimal 11,053,475.
What flights does A8A9A3 operate?
Mode-S A8A9A3 has broadcast 1 distinct callsign, including N6574D.