Apparatus

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sensors Mode-S transponder

A9953F

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N7164D · PIPER PA-31-300/310/325/350/425 · operated by AIR ARCTIC INC

Hex
A9953F
Octal
52312477
Decimal
11,113,791
Country
US
Tail
N7164D
Type
PA31
Transponder active on ground
Flights observed
103
Distinct callsigns
1
Country
US
Last broadcast
13h ago

Last known position

Most recent position reported by Mode-S A9953F.

Country allocation

The ICAO 24-bit address A9953F 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
N7164D - 103 2026-07-18

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-18 N7164D - Jul 18, 04:10 UTCJul 18, 04:25 UTC15m
2026-07-18 N7164D - Jul 18, 02:55 UTCJul 18, 03:05 UTC10m
2026-07-17 N7164D - Jul 17, 23:14 UTCJul 17, 23:30 UTC15m
2026-07-17 N7164D - Jul 17, 22:05 UTCJul 17, 22:20 UTC15m
2026-07-16 N7164D FAI → FAI Jul 16, 17:40 UTCJul 16, 18:15 UTC35m
2026-07-16 N7164D - Jul 16, 07:20 UTCJul 16, 07:40 UTC20m
2026-07-16 N7164D - Jul 16, 03:00 UTCJul 16, 03:30 UTC30m
2026-07-16 N7164D - Jul 16, 00:05 UTCJul 16, 00:25 UTC20m
2026-07-15 N7164D - Jul 15, 21:55 UTCJul 15, 22:25 UTC30m
2026-07-14 N7164D FAI → FAI Jul 14, 20:00 UTCJul 14, 21:35 UTC1h 35m
2026-07-11 N7164D FAI → FAI Jul 11, 20:10 UTCJul 11, 20:20 UTC10m
2026-07-11 N7164D - Jul 11, 00:50 UTCJul 11, 01:20 UTC30m
2026-07-10 N7164D - Jul 10, 22:20 UTCJul 10, 22:55 UTC35m
2026-07-10 N7164D - Jul 10, 05:50 UTCJul 10, 06:15 UTC25m
2026-07-10 N7164D - Jul 10, 03:05 UTCJul 10, 03:25 UTC20m
2026-07-10 N7164D - Jul 10, 00:40 UTCJul 10, 01:00 UTC20m
2026-07-09 N7164D - Jul 9, 22:50 UTCJul 9, 23:20 UTC30m
2026-07-07 N7164D - Jul 7, 23:00 UTCJul 7, 23:15 UTC15m
2026-07-07 N7164D - Jul 7, 21:10 UTCJul 7, 21:30 UTC20m
2026-07-05 N7164D - Jul 5, 20:00 UTCJul 5, 21:00 UTC1h 0m
2026-07-05 N7164D FAI → FAI Jul 5, 19:50 UTCJul 5, 19:55 UTC5m
2026-07-05 N7164D - Jul 5, 00:05 UTCJul 5, 00:20 UTC15m
2026-07-04 N7164D - Jul 4, 21:50 UTCJul 4, 22:05 UTC15m
2026-07-04 N7164D - Jul 4, 21:00 UTCJul 4, 21:15 UTC15m
2026-07-04 N7164D - Jul 4, 18:45 UTCJul 4, 19:05 UTC20m
2026-07-03 N7164D - Jul 3, 03:15 UTCJul 3, 03:35 UTC20m
2026-07-03 N7164D - Jul 3, 00:10 UTCJul 3, 00:30 UTC20m
2026-07-01 N7164D - Jul 1, 23:50 UTCJul 2, 00:15 UTC25m
2026-07-01 N7164D - Jul 1, 22:00 UTCJul 1, 22:25 UTC25m
2026-07-01 N7164D - Jul 1, 07:10 UTCJul 1, 07:30 UTC20m
2026-07-01 N7164D - Jul 1, 03:00 UTCJul 1, 03:20 UTC20m
2026-07-01 N7164D - Jul 1, 01:50 UTCJul 1, 02:05 UTC15m
2026-06-30 N7164D - Jun 30, 21:00 UTCJun 30, 21:10 UTC10m
2026-06-30 N7164D - Jun 30, 19:45 UTCJun 30, 20:00 UTC15m
2026-06-30 N7164D - Jun 30, 15:00 UTCJun 30, 15:10 UTC10m
2026-06-30 N7164D - Jun 30, 01:50 UTCJun 30, 02:00 UTC10m
2026-06-29 N7164D - Jun 29, 20:59 UTCJun 29, 21:09 UTC10m
2026-06-28 N7164D - Jun 28, 00:25 UTCJun 28, 00:39 UTC15m
2026-06-27 N7164D - Jun 27, 20:55 UTCJun 27, 21:10 UTC15m
2026-06-27 N7164D - Jun 27, 19:34 UTCJun 27, 19:55 UTC20m
2026-06-27 N7164D - Jun 27, 05:55 UTCJun 27, 06:09 UTC15m
2026-06-27 N7164D - Jun 27, 03:09 UTCJun 27, 03:25 UTC15m
2026-06-26 N7164D - Jun 26, 23:15 UTCJun 26, 23:30 UTC15m
2026-06-26 N7164D - Jun 26, 20:55 UTCJun 26, 21:15 UTC20m
2026-06-22 N7164D FAI → FAI Jun 22, 20:49 UTCJun 22, 22:19 UTC1h 30m
2026-06-22 N7164D FAI → FAI Jun 22, 00:04 UTCJun 22, 01:40 UTC1h 35m
2026-06-21 N7164D FAI → FAI Jun 21, 18:00 UTCJun 21, 19:24 UTC1h 25m
2026-06-19 N7164D FAI → FAI Jun 19, 00:10 UTCJun 19, 01:34 UTC1h 25m
2026-06-18 N7164D FAI → FAI Jun 18, 17:55 UTCJun 18, 19:20 UTC1h 25m
2026-06-17 N7164D FAI → FAI Jun 17, 23:45 UTCJun 18, 01:30 UTC1h 45m

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 N7164D page for operator, model, and routing details .

Mode-S A9953F frequently asked

What is Mode-S code A9953F?
A9953F is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N7164D.
Where is Mode-S A9953F registered?
Mode-S code A9953F 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 A9953F broadcasting right now?
Mode-S A9953F is currently broadcasting from the ground.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A9953F, octal 52312477, decimal 11,113,791.
What flights does A9953F operate?
Mode-S A9953F has broadcast 1 distinct callsign, including N7164D.