Apparatus

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sensors Mode-S transponder

A9B3DF

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N724R · PIPER PA-28-140/150/160/180 · operated by STARDUST AVIATION LLC

Hex
A9B3DF
Octal
52331737
Decimal
11,121,631
Country
US
Tail
N724R
Type
P28A
No current signal · last broadcast 8h ago
Flights observed
180
Distinct callsigns
1
Country
US
Last broadcast
8h ago

Last known position

Most recent position reported by Mode-S A9B3DF.

Country allocation

The ICAO 24-bit address A9B3DF 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
N724R - 180 2026-07-14

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 N724R - Jul 14, 01:30 UTCJul 14, 01:55 UTC25m
2026-07-13 N724R FRG → FRG Jul 13, 22:25 UTCJul 13, 23:45 UTC1h 20m
2026-07-13 N724R - Jul 13, 19:50 UTCJul 13, 20:55 UTC1h 5m
2026-07-13 N724R - Jul 13, 17:00 UTCJul 13, 18:15 UTC1h 15m
2026-07-13 N724R FRG → FRG Jul 13, 14:45 UTCJul 13, 15:45 UTC1h 0m
2026-07-13 N724R - Jul 13, 12:00 UTCJul 13, 13:55 UTC1h 55m
2026-07-12 N724R - Jul 12, 14:30 UTCJul 12, 16:25 UTC1h 55m
2026-07-12 N724R FRG → FRG Jul 12, 12:35 UTCJul 12, 13:55 UTC1h 20m
2026-07-11 N724R FRG → FRG Jul 11, 19:10 UTCJul 11, 20:20 UTC1h 10m
2026-07-11 N724R - Jul 11, 14:35 UTCJul 11, 15:05 UTC30m
2026-07-11 N724R - Jul 11, 13:00 UTCJul 11, 13:50 UTC50m
2026-07-11 N724R - Jul 11, 02:55 UTCJul 11, 03:35 UTC40m
2026-07-10 N724R - Jul 10, 22:45 UTCJul 10, 23:35 UTC50m
2026-07-10 N724R - Jul 10, 17:45 UTCJul 10, 19:45 UTC2h 0m
2026-07-10 N724R - Jul 10, 15:50 UTCJul 10, 16:55 UTC1h 5m
2026-07-03 N724R - Jul 3, 13:45 UTCJul 3, 15:40 UTC1h 55m
2026-07-02 N724R - Jul 2, 17:05 UTCJul 2, 18:00 UTC55m
2026-07-02 N724R - Jul 2, 15:15 UTCJul 2, 16:05 UTC50m
2026-07-02 N724R FRG → GON Jul 2, 13:50 UTCJul 2, 14:40 UTC50m
2026-07-01 N724R - Jul 1, 21:55 UTCJul 1, 23:00 UTC1h 5m
2026-07-01 N724R FRG → FRG Jul 1, 19:00 UTCJul 1, 20:15 UTC1h 15m
2026-07-01 N724R - Jul 1, 17:20 UTCJul 1, 18:05 UTC45m
2026-06-30 N724R - Jun 30, 20:10 UTCJun 30, 21:15 UTC1h 5m
2026-06-30 N724R - Jun 30, 18:00 UTCJun 30, 19:05 UTC1h 5m
2026-06-30 N724R - Jun 30, 15:55 UTCJun 30, 16:50 UTC55m
2026-06-30 N724R - Jun 30, 14:35 UTCJun 30, 15:20 UTC45m
2026-06-30 N724R FRG → FRG Jun 30, 12:30 UTCJun 30, 13:50 UTC1h 20m
2026-06-29 N724R - Jun 29, 21:05 UTCJun 29, 22:10 UTC1h 5m
2026-06-29 N724R - Jun 29, 19:39 UTCJun 29, 20:24 UTC45m
2026-06-29 N724R - Jun 29, 18:14 UTCJun 29, 19:00 UTC45m
2026-06-29 N724R - Jun 29, 17:05 UTCJun 29, 17:30 UTC25m
2026-06-29 N724R FRG → FRG Jun 29, 16:04 UTCJun 29, 16:29 UTC25m
2026-06-28 N724R - Jun 28, 20:59 UTCJun 28, 22:10 UTC1h 10m
2026-06-28 N724R - Jun 28, 16:45 UTCJun 28, 17:10 UTC25m
2026-06-28 N724R FRG → FRG Jun 28, 14:34 UTCJun 28, 15:44 UTC1h 10m
2026-06-28 N724R - Jun 28, 12:39 UTCJun 28, 13:49 UTC1h 10m
2026-06-27 N724R FRG → FRG Jun 27, 14:29 UTCJun 27, 15:49 UTC1h 20m
2026-06-26 N724R - Jun 26, 19:20 UTCJun 26, 20:10 UTC50m
2026-06-25 N724R - Jun 25, 19:20 UTCJun 25, 20:30 UTC1h 10m
2026-06-25 N724R FRG → FRG Jun 25, 16:59 UTCJun 25, 18:19 UTC1h 20m
2026-06-25 N724R - Jun 25, 15:04 UTCJun 25, 15:59 UTC55m
2026-06-25 N724R FRG → FRG Jun 25, 12:30 UTCJun 25, 13:50 UTC1h 20m
2026-06-25 N724R - Jun 25, 01:59 UTCJun 25, 02:30 UTC30m
2026-06-24 N724R - Jun 24, 23:59 UTCJun 25, 00:29 UTC30m
2026-06-24 N724R FRG → FRG Jun 24, 21:19 UTCJun 24, 22:14 UTC55m
2026-06-24 N724R FRG → FRG Jun 24, 19:15 UTCJun 24, 20:24 UTC1h 10m
2026-06-24 N724R - Jun 24, 17:10 UTCJun 24, 18:25 UTC1h 15m
2026-06-24 N724R - Jun 24, 15:49 UTCJun 24, 16:24 UTC35m
2026-06-24 N724R FRG → FRG Jun 24, 14:50 UTCJun 24, 15:14 UTC25m
2026-06-24 N724R FRG → FRG Jun 24, 13:10 UTCJun 24, 13:54 UTC45m

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 N724R page for operator, model, and routing details .

Mode-S A9B3DF frequently asked

What is Mode-S code A9B3DF?
A9B3DF is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N724R.
Where is Mode-S A9B3DF registered?
Mode-S code A9B3DF 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 A9B3DF broadcasting right now?
No active broadcast right now. Last signal was 8h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A9B3DF, octal 52331737, decimal 11,121,631.
What flights does A9B3DF operate?
Mode-S A9B3DF has broadcast 1 distinct callsign, including N724R.