Apparatus

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sensors Mode-S transponder

A54D8A

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N4404J · PIPER PA-28-140/150/160/180 · operated by FLY LIKE A GIRL LLC

Hex
A54D8A
Octal
51246612
Decimal
10,833,290
Country
US
Tail
N4404J
Type
P28A
No current signal · last broadcast 14h ago
Flights observed
35
Distinct callsigns
1
Country
US
Last broadcast
14h ago

Last known position

Most recent position reported by Mode-S A54D8A.

Country allocation

The ICAO 24-bit address A54D8A 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
N4404J - 35 2026-07-13

Recent flights last 35

DateFlightRouteTakeoffLandingDuration
2026-07-13 N4404J - Jul 13, 21:20 UTCJul 13, 21:35 UTC15m
2026-07-13 N4404J FBS → MVW Jul 13, 19:10 UTCJul 13, 19:25 UTC15m
2026-07-11 N4404J BFI → FBS Jul 11, 22:55 UTCJul 11, 23:35 UTC40m
2026-07-08 N4404J - Jul 8, 01:45 UTCJul 8, 02:20 UTC35m
2026-07-07 N4404J OTS → FBS Jul 7, 20:25 UTCJul 7, 21:30 UTC1h 5m
2026-07-03 N4404J - Jul 3, 23:35 UTCJul 3, 23:50 UTC15m
2026-07-02 N4404J - Jul 2, 15:30 UTCJul 2, 15:45 UTC15m
2026-07-02 N4404J - Jul 2, 14:45 UTCJul 2, 15:00 UTC15m
2026-06-30 N4404J - Jun 30, 22:40 UTCJun 30, 23:25 UTC45m
2026-06-30 N4404J BFI → FRD Jun 30, 01:50 UTCJun 30, 02:30 UTC40m
2026-06-30 N4404J - Jun 30, 00:35 UTCJun 30, 01:30 UTC56m
2026-06-24 N4404J - Jun 24, 21:34 UTCJun 24, 22:19 UTC45m
2026-06-24 N4404J - Jun 24, 17:34 UTCJun 24, 19:10 UTC1h 35m
2026-06-21 N4404J - Jun 21, 22:24 UTCJun 21, 23:59 UTC1h 35m
2026-06-20 N4404J - Jun 20, 19:40 UTCJun 20, 20:45 UTC1h 5m
2026-06-20 N4404J FRD → BLI Jun 20, 18:40 UTCJun 20, 18:54 UTC15m
2026-06-19 N4404J - Jun 19, 23:49 UTCJun 20, 00:54 UTC1h 5m
2026-06-19 N4404J FRD → FRD Jun 19, 16:44 UTCJun 19, 18:25 UTC1h 40m
2026-06-19 N4404J - Jun 19, 15:29 UTCJun 19, 15:54 UTC25m
2026-06-18 N4404J BFI → FRD Jun 18, 16:20 UTCJun 18, 17:05 UTC45m
2026-06-18 N4404J - Jun 18, 15:15 UTCJun 18, 15:45 UTC30m
2026-06-17 N4404J - Jun 17, 23:35 UTCJun 18, 00:10 UTC35m
2026-06-17 N4404J FRD → FBS Jun 17, 20:35 UTCJun 17, 21:25 UTC50m
2026-06-14 N4404J - Jun 14, 23:00 UTCJun 14, 23:15 UTC15m
2026-06-14 N4404J DTR → MVW Jun 14, 22:20 UTCJun 14, 22:30 UTC10m
2026-06-14 N4404J - Jun 14, 20:45 UTCJun 14, 21:25 UTC40m
2026-06-13 N4404J - Jun 13, 20:55 UTCJun 13, 21:35 UTC40m
2026-06-11 N4404J - Jun 11, 18:10 UTCJun 11, 18:25 UTC15m
2026-06-11 N4404J - Jun 11, 16:15 UTCJun 11, 16:30 UTC15m
2026-06-11 N4404J - Jun 11, 03:10 UTCJun 11, 03:35 UTC25m
2026-06-07 N4404J PAE → FBS Jun 7, 22:20 UTCJun 7, 22:50 UTC30m
2026-06-07 N4404J - Jun 7, 19:40 UTCJun 7, 21:50 UTC2h 10m
2026-06-07 N4404J - Jun 7, 17:50 UTCJun 7, 18:50 UTC1h 0m
2026-06-07 N4404J - Jun 7, 16:35 UTCJun 7, 17:20 UTC45m
2026-06-07 N4404J - Jun 7, 00:25 UTCJun 7, 02:04 UTC1h 40m

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 N4404J page for operator, model, and routing details .

Mode-S A54D8A frequently asked

What is Mode-S code A54D8A?
A54D8A is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N4404J.
Where is Mode-S A54D8A registered?
Mode-S code A54D8A 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 A54D8A broadcasting right now?
No active broadcast right now. Last signal was 14h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A54D8A, octal 51246612, decimal 10,833,290.
What flights does A54D8A operate?
Mode-S A54D8A has broadcast 1 distinct callsign, including N4404J.