Apparatus

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sensors Mode-S transponder

AAC4FD

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N793US · DIAMOND DA-40 Club Star · operated by UTAH VALLEY UNIVERSITY

Hex
AAC4FD
Octal
52542375
Decimal
11,191,549
Country
US
Tail
N793US
Type
DA40
No current signal · last broadcast 50m ago
Flights observed
104
Distinct callsigns
1
Country
US
Last broadcast
50m ago

Last known position

Most recent position reported by Mode-S AAC4FD.

Country allocation

The ICAO 24-bit address AAC4FD 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
N793US - 104 2026-06-02

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-06-02 N793US - Jun 2, 20:35 UTCJun 2, 20:45 UTC10m
2026-06-02 N793US - Jun 2, 19:35 UTCJun 2, 19:45 UTC10m
2026-06-02 N793US PVU → PVU Jun 2, 16:30 UTCJun 2, 17:45 UTC1h 15m
2026-06-02 N793US PVU → PVU Jun 2, 13:20 UTCJun 2, 14:30 UTC1h 10m
2026-06-01 N793US - Jun 1, 23:00 UTCJun 1, 23:10 UTC10m
2026-06-01 N793US - Jun 1, 21:40 UTCJun 1, 22:05 UTC25m
2026-06-01 N793US PVU → PVU Jun 1, 18:55 UTCJun 1, 19:40 UTC45m
2026-06-01 N793US - Jun 1, 17:25 UTCJun 1, 17:40 UTC15m
2026-06-01 N793US - Jun 1, 16:20 UTCJun 1, 16:30 UTC10m
2026-06-01 N793US - Jun 1, 13:15 UTCJun 1, 14:30 UTC1h 15m
2026-05-30 N793US PVU → PVU May 30, 19:20 UTCMay 30, 20:15 UTC55m
2026-05-29 N793US - May 29, 17:00 UTCMay 29, 17:15 UTC15m
2026-05-29 N793US - May 29, 16:05 UTCMay 29, 16:20 UTC15m
2026-05-29 N793US - May 29, 14:35 UTCMay 29, 14:55 UTC20m
2026-05-29 N793US - May 29, 13:40 UTCMay 29, 13:55 UTC15m
2026-05-28 N793US PVU → PVU May 28, 18:15 UTCMay 28, 19:10 UTC55m
2026-05-28 N793US PVU → PVU May 28, 16:20 UTCMay 28, 17:15 UTC55m
2026-05-28 N793US - May 28, 14:30 UTCMay 28, 14:50 UTC20m
2026-05-28 N793US - May 28, 13:20 UTCMay 28, 13:35 UTC15m
2026-05-28 N793US PVU → PVU May 28, 02:25 UTCMay 28, 03:15 UTC50m
2026-05-23 N793US PVU → PVU May 23, 20:40 UTCMay 23, 21:05 UTC25m
2026-05-23 N793US PVU → PVU May 23, 18:45 UTCMay 23, 19:25 UTC40m
2026-05-23 N793US - May 23, 15:30 UTCMay 23, 15:40 UTC10m
2026-05-23 N793US - May 23, 13:15 UTCMay 23, 13:40 UTC25m
2026-05-23 N793US - May 23, 01:40 UTCMay 23, 02:40 UTC59m
2026-05-22 N793US - May 22, 22:35 UTCMay 22, 23:00 UTC25m
2026-05-22 N793US - May 22, 21:40 UTCMay 22, 21:55 UTC15m
2026-05-22 N793US - May 22, 19:10 UTCMay 22, 19:50 UTC40m
2026-05-22 N793US - May 22, 17:40 UTCMay 22, 17:50 UTC10m
2026-05-22 N793US PVU → PVU May 22, 13:40 UTCMay 22, 15:10 UTC1h 30m
2026-05-21 N793US - May 21, 18:45 UTCMay 21, 19:35 UTC50m
2026-05-21 N793US - May 21, 15:50 UTCMay 21, 17:10 UTC1h 20m
2026-05-21 N793US - May 21, 14:10 UTCMay 21, 14:55 UTC45m
2026-05-21 N793US PVU → PVU May 21, 03:35 UTCMay 21, 06:00 UTC2h 25m
2026-05-21 N793US PVU → PVU May 21, 00:40 UTCMay 21, 01:20 UTC40m
2026-05-20 N793US - May 20, 22:40 UTCMay 20, 23:20 UTC40m
2026-05-15 N793US - May 15, 17:55 UTCMay 15, 18:15 UTC20m
2026-05-15 N793US - May 15, 17:05 UTCMay 15, 17:20 UTC15m
2026-05-15 N793US PVU → PVU May 15, 00:45 UTCMay 15, 01:45 UTC1h 0m
2026-05-14 N793US - May 14, 21:10 UTCMay 14, 21:55 UTC45m
2026-05-14 N793US PVU → PVU May 14, 19:25 UTCMay 14, 20:10 UTC45m
2026-05-14 N793US - May 14, 16:05 UTCMay 14, 17:00 UTC55m
2026-05-14 N793US - May 14, 13:50 UTCMay 14, 14:45 UTC55m
2026-05-13 N793US PVU → PVU May 13, 17:15 UTCMay 13, 17:30 UTC15m
2026-05-13 N793US - May 13, 14:30 UTCMay 13, 15:15 UTC45m
2026-05-12 N793US - May 12, 18:05 UTCMay 12, 18:25 UTC20m
2026-05-12 N793US - May 12, 16:10 UTCMay 12, 16:35 UTC25m
2026-05-12 N793US PVU → PVU May 12, 13:55 UTCMay 12, 14:50 UTC55m
2026-05-11 N793US - May 11, 19:20 UTCMay 11, 19:35 UTC15m
2026-05-11 N793US PVU → PVU May 11, 17:05 UTCMay 11, 18:05 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 N793US page for operator, model, and routing details .

Mode-S AAC4FD frequently asked

What is Mode-S code AAC4FD?
AAC4FD is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N793US.
Where is Mode-S AAC4FD registered?
Mode-S code AAC4FD 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 AAC4FD broadcasting right now?
No active broadcast right now. Last signal was 50m ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex AAC4FD, octal 52542375, decimal 11,191,549.
What flights does AAC4FD operate?
Mode-S AAC4FD has broadcast 1 distinct callsign, including N793US.