Apparatus

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sensors Mode-S transponder

A55FD7

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N4452J · PIPER PA-28-140/150/160/180 · operated by FLY AROUND ALASKA LLC

Hex
A55FD7
Octal
51257727
Decimal
10,837,975
Country
US
Tail
N4452J
Type
P28A
No current signal · last broadcast 22h ago
Flights observed
85
Distinct callsigns
1
Country
US
Last broadcast
22h ago

Last known position

Most recent position reported by Mode-S A55FD7.

Country allocation

The ICAO 24-bit address A55FD7 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
N4452J - 85 2026-07-13

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-13 N4452J - Jul 13, 20:50 UTCJul 13, 22:05 UTC1h 15m
2026-07-13 N4452J PAQ → PAQ Jul 13, 17:55 UTCJul 13, 19:05 UTC1h 10m
2026-07-12 N4452J - Jul 12, 17:40 UTCJul 12, 18:15 UTC35m
2026-07-11 N4452J PAQ → PAQ Jul 11, 19:10 UTCJul 11, 19:35 UTC25m
2026-07-11 N4452J - Jul 11, 15:30 UTCJul 11, 17:25 UTC1h 55m
2026-07-11 N4452J PAQ → PAQ Jul 11, 01:20 UTCJul 11, 01:55 UTC35m
2026-07-10 N4452J - Jul 10, 22:05 UTCJul 10, 23:15 UTC1h 10m
2026-07-10 N4452J - Jul 10, 18:50 UTCJul 10, 20:10 UTC1h 20m
2026-07-10 N4452J - Jul 10, 04:30 UTCJul 10, 05:40 UTC1h 10m
2026-07-10 N4452J - Jul 10, 01:45 UTCJul 10, 03:05 UTC1h 20m
2026-07-03 N4452J - Jul 3, 21:20 UTCJul 3, 21:50 UTC30m
2026-07-01 N4452J - Jul 1, 20:10 UTCJul 1, 20:35 UTC25m
2026-07-01 N4452J - Jul 1, 19:40 UTCJul 1, 19:55 UTC15m
2026-07-01 N4452J - Jul 1, 18:50 UTCJul 1, 19:35 UTC45m
2026-07-01 N4452J PAQ → PAQ Jul 1, 03:00 UTCJul 1, 03:35 UTC35m
2026-07-01 N4452J PAQ → PAQ Jul 1, 00:55 UTCJul 1, 02:15 UTC1h 20m
2026-06-28 N4452J PAQ → PAQ Jun 28, 17:44 UTCJun 28, 18:59 UTC1h 15m
2026-06-27 N4452J PAQ → PAQ Jun 27, 19:05 UTCJun 27, 20:29 UTC1h 25m
2026-06-26 N4452J - Jun 26, 20:15 UTCJun 26, 20:44 UTC30m
2026-06-26 N4452J - Jun 26, 19:50 UTCJun 26, 20:04 UTC15m
2026-06-26 N4452J PAQ → MRI Jun 26, 19:09 UTCJun 26, 19:39 UTC30m
2026-06-26 N4452J - Jun 26, 16:49 UTCJun 26, 17:59 UTC1h 10m
2026-06-26 N4452J PAQ → TKA Jun 26, 15:10 UTCJun 26, 16:44 UTC1h 35m
2026-06-26 N4452J PAQ → PAQ Jun 26, 00:55 UTCJun 26, 02:05 UTC1h 10m
2026-06-25 N4452J - Jun 25, 20:19 UTCJun 25, 20:30 UTC10m
2026-06-25 N4452J - Jun 25, 16:14 UTCJun 25, 16:55 UTC40m
2026-06-25 N4452J - Jun 25, 15:50 UTCJun 25, 16:09 UTC20m
2026-06-25 N4452J - Jun 25, 15:15 UTCJun 25, 15:44 UTC30m
2026-06-24 N4452J PAQ → PAQ Jun 24, 21:00 UTCJun 24, 22:04 UTC1h 5m
2026-06-24 N4452J PAQ → PAQ Jun 24, 18:55 UTCJun 24, 20:09 UTC1h 15m
2026-06-22 N4452J - Jun 22, 18:00 UTCJun 22, 19:40 UTC1h 40m
2026-06-22 N4452J - Jun 22, 16:34 UTCJun 22, 17:00 UTC25m
2026-06-22 N4452J - Jun 22, 15:54 UTCJun 22, 16:29 UTC35m
2026-06-22 N4452J - Jun 22, 15:24 UTCJun 22, 15:50 UTC25m
2026-06-21 N4452J - Jun 21, 22:00 UTCJun 21, 22:15 UTC15m
2026-06-21 N4452J - Jun 21, 20:50 UTCJun 21, 21:19 UTC30m
2026-06-21 N4452J - Jun 21, 19:50 UTCJun 21, 20:00 UTC10m
2026-06-21 N4452J - Jun 21, 18:39 UTCJun 21, 19:14 UTC35m
2026-06-20 N4452J PAQ → PAQ Jun 20, 22:05 UTCJun 20, 22:39 UTC35m
2026-06-20 N4452J PAQ → PAQ Jun 20, 18:29 UTCJun 20, 20:29 UTC2h 0m
2026-06-20 N4452J - Jun 20, 15:14 UTCJun 20, 16:00 UTC45m
2026-06-19 N4452J - Jun 19, 17:34 UTCJun 19, 18:54 UTC1h 20m
2026-06-19 N4452J PAQ → PAQ Jun 19, 15:19 UTCJun 19, 15:59 UTC40m
2026-06-18 N4452J - Jun 18, 22:00 UTCJun 18, 23:35 UTC1h 35m
2026-06-18 N4452J PAQ → PAQ Jun 18, 19:10 UTCJun 18, 20:05 UTC55m
2026-06-18 N4452J PAQ → PAQ Jun 18, 15:15 UTCJun 18, 17:10 UTC1h 55m
2026-06-17 N4452J PAQ → PAQ Jun 17, 19:45 UTCJun 17, 21:00 UTC1h 15m
2026-06-17 N4452J PAQ → PAQ Jun 17, 15:25 UTCJun 17, 16:45 UTC1h 20m
2026-06-16 N4452J - Jun 16, 18:35 UTCJun 16, 19:35 UTC1h 0m
2026-06-16 N4452J PAQ → PAQ Jun 16, 15:40 UTCJun 16, 16:35 UTC55m

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 N4452J page for operator, model, and routing details .

Mode-S A55FD7 frequently asked

What is Mode-S code A55FD7?
A55FD7 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N4452J.
Where is Mode-S A55FD7 registered?
Mode-S code A55FD7 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 A55FD7 broadcasting right now?
No active broadcast right now. Last signal was 22h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A55FD7, octal 51257727, decimal 10,837,975.
What flights does A55FD7 operate?
Mode-S A55FD7 has broadcast 1 distinct callsign, including N4452J.