Apparatus

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sensors Mode-S transponder

AAC5A9

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N7931D · BEECH 90 King Air · operated by JET AIR INC

Hex
AAC5A9
Octal
52542651
Decimal
11,191,721
Country
US
Tail
N7931D
Type
BE9L
No current signal · last broadcast 11d ago
Flights observed
131
Distinct callsigns
1
Country
US
Last broadcast
11d ago

Last known position

Most recent position reported by Mode-S AAC5A9.

Country allocation

The ICAO 24-bit address AAC5A9 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
N7931D - 131 2026-07-26

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 N7931D - Jul 26, 18:25 UTCJul 26, 20:20 UTC1h 55m
2026-07-26 N7931D - Jul 26, 15:55 UTCJul 26, 17:20 UTC1h 25m
2026-07-24 N7931D - Jul 24, 19:25 UTCJul 24, 20:15 UTC50m
2026-07-24 N7931D - Jul 24, 18:00 UTCJul 24, 18:50 UTC50m
2026-07-24 N7931D - Jul 24, 17:20 UTCJul 24, 17:30 UTC10m
2026-07-24 N7931D - Jul 24, 15:30 UTCJul 24, 15:50 UTC20m
2026-07-23 N7931D - Jul 23, 20:10 UTCJul 23, 21:05 UTC55m
2026-07-23 N7931D - Jul 23, 12:50 UTCJul 23, 13:15 UTC25m
2026-07-23 N7931D - Jul 23, 11:40 UTCJul 23, 12:10 UTC30m
2026-07-22 N7931D - Jul 22, 00:50 UTCJul 22, 01:05 UTC15m
2026-07-21 N7931D - Jul 21, 22:50 UTCJul 21, 23:25 UTC35m
2026-07-21 N7931D - Jul 21, 11:55 UTCJul 21, 13:10 UTC1h 15m
2026-07-20 N7931D - Jul 20, 21:00 UTCJul 20, 23:50 UTC2h 50m
2026-07-20 N7931D - Jul 20, 19:35 UTCJul 20, 20:25 UTC50m
2026-07-17 N7931D - Jul 17, 23:00 UTCJul 18, 01:45 UTC2h 45m
2026-07-17 N7931D - Jul 17, 20:55 UTCJul 17, 21:44 UTC50m
2026-07-17 N7931D - Jul 17, 18:05 UTCJul 17, 19:45 UTC1h 40m
2026-07-17 N7931D - Jul 17, 17:05 UTCJul 17, 17:35 UTC30m
2026-07-16 N7931D - Jul 16, 21:30 UTCJul 16, 22:05 UTC35m
2026-07-16 N7931D - Jul 16, 19:50 UTCJul 16, 20:39 UTC50m
2026-07-16 N7931D - Jul 16, 12:05 UTCJul 16, 13:54 UTC1h 50m
2026-07-14 N7931D - Jul 14, 14:10 UTCJul 14, 14:55 UTC45m
2026-07-14 N7931D - Jul 14, 10:25 UTCJul 14, 13:30 UTC3h 5m
2026-07-14 N7931D - Jul 14, 01:40 UTCJul 14, 02:35 UTC55m
2026-07-14 N7931D - Jul 14, 00:20 UTCJul 14, 01:05 UTC45m
2026-07-13 N7931D - Jul 13, 13:30 UTCJul 13, 14:20 UTC50m
2026-07-13 N7931D - Jul 13, 10:45 UTCJul 13, 11:30 UTC45m
2026-07-10 N7931D - Jul 10, 19:55 UTCJul 10, 21:20 UTC1h 25m
2026-07-10 N7931D - Jul 10, 18:05 UTCJul 10, 19:05 UTC1h 0m
2026-07-10 N7931D - Jul 10, 16:45 UTCJul 10, 17:00 UTC15m
2026-07-09 N7931D - Jul 9, 21:35 UTCJul 9, 22:45 UTC1h 10m
2026-07-09 N7931D - Jul 9, 16:55 UTCJul 9, 17:20 UTC25m
2026-07-09 N7931D - Jul 9, 15:25 UTCJul 9, 15:50 UTC25m
2026-07-03 N7931D - Jul 3, 20:05 UTCJul 3, 20:15 UTC10m
2026-07-03 N7931D - Jul 3, 18:30 UTCJul 3, 19:25 UTC55m
2026-07-03 N7931D - Jul 3, 14:45 UTCJul 3, 15:45 UTC1h 0m
2026-07-03 N7931D IOW → MUT Jul 3, 13:10 UTCJul 3, 13:20 UTC10m
2026-07-01 N7931D - Jul 1, 17:10 UTCJul 1, 17:25 UTC15m
2026-06-29 N7931D - Jun 29, 19:09 UTCJun 29, 19:24 UTC15m
2026-06-23 N7931D - Jun 23, 17:04 UTCJun 23, 18:29 UTC1h 25m
2026-06-23 N7931D - Jun 23, 15:24 UTCJun 23, 15:59 UTC35m
2026-06-23 N7931D - Jun 23, 13:39 UTCJun 23, 14:55 UTC1h 15m
2026-06-22 N7931D - Jun 22, 23:35 UTCJun 23, 00:45 UTC1h 10m
2026-06-22 N7931D - Jun 22, 13:19 UTCJun 22, 13:44 UTC25m
2026-06-22 N7931D - Jun 22, 11:44 UTCJun 22, 12:15 UTC30m
2026-06-21 N7931D - Jun 21, 19:00 UTCJun 21, 19:09 UTC10m
2026-06-21 N7931D - Jun 21, 17:10 UTCJun 21, 18:29 UTC1h 20m
2026-06-21 N7931D - Jun 21, 14:54 UTCJun 21, 16:04 UTC1h 10m
2026-06-19 N7931D - Jun 19, 21:34 UTCJun 19, 21:54 UTC20m
2026-06-18 N7931D - Jun 18, 21:40 UTCJun 18, 22:45 UTC1h 5m

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 N7931D page for operator, model, and routing details .

Mode-S AAC5A9 frequently asked

What is Mode-S code AAC5A9?
AAC5A9 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N7931D.
Where is Mode-S AAC5A9 registered?
Mode-S code AAC5A9 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 AAC5A9 broadcasting right now?
No active broadcast right now. Last signal was 11d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex AAC5A9, octal 52542651, decimal 11,191,721.
What flights does AAC5A9 operate?
Mode-S AAC5A9 has broadcast 1 distinct callsign, including N7931D.