Apparatus

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sensors Mode-S transponder

A9A1D2

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N72GJ · operated by SKYDIVE GREENE COUNTY INC

Hex
A9A1D2
Octal
52320722
Decimal
11,117,010
Country
US
Tail
N72GJ
Type
C182
No current signal · last broadcast Jul 25, 22:45 UTC
Flights observed
69
Distinct callsigns
1
Country
US
Last broadcast
Jul 25, 22:45 UTC

Last known position

Most recent position reported by Mode-S A9A1D2.

Country allocation

The ICAO 24-bit address A9A1D2 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
N72GJ - 69 2026-07-25

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-25 N72GJ - Jul 25, 22:15 UTCJul 25, 22:45 UTC30m
2026-07-25 N72GJ - Jul 25, 18:55 UTCJul 25, 19:55 UTC1h 0m
2026-07-25 N72GJ - Jul 25, 17:50 UTCJul 25, 18:20 UTC30m
2026-07-25 N72GJ - Jul 25, 13:50 UTCJul 25, 17:10 UTC3h 20m
2026-07-24 N72GJ - Jul 24, 22:00 UTCJul 24, 23:35 UTC1h 35m
2026-07-24 N72GJ - Jul 24, 20:30 UTCJul 24, 21:30 UTC1h 0m
2026-07-24 N72GJ - Jul 24, 18:25 UTCJul 24, 19:55 UTC1h 30m
2026-07-24 N72GJ - Jul 24, 17:05 UTCJul 24, 17:40 UTC35m
2026-07-24 N72GJ - Jul 24, 15:30 UTCJul 24, 16:20 UTC50m
2026-07-22 N72GJ - Jul 22, 19:35 UTCJul 22, 23:10 UTC3h 35m
2026-07-19 N72GJ - Jul 19, 19:15 UTCJul 19, 19:35 UTC20m
2026-07-19 N72GJ - Jul 19, 17:00 UTCJul 19, 18:20 UTC1h 20m
2026-07-19 N72GJ - Jul 19, 15:35 UTCJul 19, 16:00 UTC25m
2026-07-19 N72GJ - Jul 19, 13:30 UTCJul 19, 13:55 UTC25m
2026-07-18 N72GJ - Jul 18, 16:10 UTCJul 18, 16:30 UTC20m
2026-07-18 N72GJ - Jul 18, 13:45 UTCJul 18, 15:30 UTC1h 45m
2026-07-08 N72GJ - Jul 8, 19:25 UTCJul 8, 19:50 UTC25m
2026-07-05 N72GJ - Jul 5, 17:00 UTCJul 5, 20:45 UTC3h 45m
2026-07-04 N72GJ - Jul 4, 22:30 UTCJul 4, 23:20 UTC50m
2026-07-04 N72GJ - Jul 4, 19:45 UTCJul 4, 21:15 UTC1h 30m
2026-07-04 N72GJ - Jul 4, 18:40 UTCJul 4, 19:10 UTC30m
2026-07-04 N72GJ - Jul 4, 17:40 UTCJul 4, 17:55 UTC15m
2026-07-04 N72GJ - Jul 4, 13:55 UTCJul 4, 16:35 UTC2h 40m
2026-07-03 N72GJ - Jul 3, 21:50 UTCJul 3, 22:45 UTC55m
2026-07-03 N72GJ - Jul 3, 20:50 UTCJul 3, 21:20 UTC30m
2026-07-03 N72GJ - Jul 3, 19:30 UTCJul 3, 20:00 UTC30m
2026-07-01 N72GJ - Jul 1, 21:55 UTCJul 1, 23:35 UTC1h 40m
2026-07-01 N72GJ - Jul 1, 17:35 UTCJul 1, 17:55 UTC20m
2026-06-21 N72GJ - Jun 21, 19:55 UTCJun 21, 20:54 UTC1h 0m
2026-06-21 N72GJ - Jun 21, 17:15 UTCJun 21, 18:25 UTC1h 10m
2026-06-21 N72GJ - Jun 21, 14:54 UTCJun 21, 16:14 UTC1h 20m
2026-06-20 N72GJ - Jun 20, 19:49 UTCJun 20, 22:35 UTC2h 45m
2026-06-20 N72GJ - Jun 20, 18:19 UTCJun 20, 18:45 UTC25m
2026-06-20 N72GJ - Jun 20, 17:10 UTCJun 20, 17:44 UTC35m
2026-06-20 N72GJ - Jun 20, 15:09 UTCJun 20, 15:24 UTC15m
2026-06-19 N72GJ - Jun 19, 21:44 UTCJun 19, 22:09 UTC25m
2026-06-19 N72GJ - Jun 19, 19:59 UTCJun 19, 20:55 UTC55m
2026-06-13 N72GJ - Jun 13, 15:50 UTCJun 13, 22:15 UTC6h 25m
2026-06-13 N72GJ - Jun 13, 13:50 UTCJun 13, 14:50 UTC1h 0m
2026-06-12 N72GJ - Jun 12, 21:55 UTCJun 12, 22:45 UTC50m
2026-06-12 N72GJ - Jun 12, 20:30 UTCJun 12, 21:25 UTC55m
2026-06-12 N72GJ - Jun 12, 19:35 UTCJun 12, 19:55 UTC20m
2026-06-07 N72GJ - Jun 7, 19:35 UTCJun 7, 20:00 UTC25m
2026-06-07 N72GJ - Jun 7, 14:50 UTCJun 7, 16:10 UTC1h 20m
2026-06-07 N72GJ - Jun 7, 13:50 UTCJun 7, 14:15 UTC25m
2026-06-06 N72GJ - Jun 6, 20:25 UTCJun 6, 21:30 UTC1h 5m
2026-06-06 N72GJ - Jun 6, 16:30 UTCJun 6, 19:54 UTC3h 25m
2026-06-06 N72GJ - Jun 6, 14:54 UTCJun 6, 15:19 UTC25m
2026-06-06 N72GJ - Jun 6, 13:44 UTCJun 6, 14:14 UTC30m
2026-06-03 N72GJ - Jun 3, 19:35 UTCJun 3, 22:30 UTC2h 55m

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 N72GJ page for operator, model, and routing details .

Mode-S A9A1D2 frequently asked

What is Mode-S code A9A1D2?
A9A1D2 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N72GJ.
Where is Mode-S A9A1D2 registered?
Mode-S code A9A1D2 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 A9A1D2 broadcasting right now?
No active broadcast right now. Last signal was Jul 25, 22:45 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A9A1D2, octal 52320722, decimal 11,117,010.
What flights does A9A1D2 operate?
Mode-S A9A1D2 has broadcast 1 distinct callsign, including N72GJ.