Apparatus

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sensors Mode-S transponder

A4057A

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N3584S · CESSNA 172 Skyhawk · operated by PAUL AVIATION LLC

Hex
A4057A
Octal
51002572
Decimal
10,749,306
Country
US
Tail
N3584S
Type
C172
No current signal · last broadcast 17h ago
Flights observed
199
Distinct callsigns
1
Country
US
Last broadcast
17h ago

Last known position

Most recent position reported by Mode-S A4057A.

Country allocation

The ICAO 24-bit address A4057A 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
N3584S - 199 2026-07-17

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-17 N3584S - Jul 17, 17:50 UTCJul 17, 19:05 UTC1h 15m
2026-07-16 N3584S MIT → MIT Jul 16, 15:25 UTCJul 16, 16:15 UTC50m
2026-07-16 N3584S - Jul 16, 13:40 UTCJul 16, 14:29 UTC50m
2026-07-15 N3584S - Jul 15, 14:40 UTCJul 15, 15:25 UTC45m
2026-07-13 N3584S - Jul 13, 16:40 UTCJul 13, 16:50 UTC10m
2026-07-10 N3584S - Jul 10, 14:45 UTCJul 10, 15:35 UTC50m
2026-07-08 N3584S MIT → MIT Jul 8, 16:35 UTCJul 8, 17:35 UTC1h 0m
2026-07-08 N3584S - Jul 8, 14:45 UTCJul 8, 15:35 UTC50m
2026-07-06 N3584S - Jul 6, 01:40 UTCJul 6, 02:25 UTC45m
2026-07-05 N3584S - Jul 5, 15:10 UTCJul 5, 16:00 UTC50m
2026-07-04 N3584S MIT → MIT Jul 4, 14:40 UTCJul 4, 16:00 UTC1h 20m
2026-06-30 N3584S - Jun 30, 15:45 UTCJun 30, 16:55 UTC1h 10m
2026-06-30 N3584S MIT → MIT Jun 30, 13:30 UTCJun 30, 14:20 UTC50m
2026-06-29 N3584S - Jun 29, 21:34 UTCJun 29, 22:30 UTC55m
2026-06-29 N3584S - Jun 29, 15:00 UTCJun 29, 15:49 UTC50m
2026-06-28 N3584S - Jun 28, 16:29 UTCJun 28, 17:39 UTC1h 10m
2026-06-28 N3584S MIT → MIT Jun 28, 13:14 UTCJun 28, 14:30 UTC1h 15m
2026-06-27 N3584S - Jun 27, 23:25 UTCJun 27, 23:55 UTC30m
2026-06-27 N3584S MIT → MIT Jun 27, 19:09 UTCJun 27, 20:24 UTC1h 15m
2026-06-27 N3584S - Jun 27, 16:14 UTCJun 27, 17:20 UTC1h 5m
2026-06-26 N3584S - Jun 26, 17:15 UTCJun 26, 18:04 UTC50m
2026-06-26 N3584S MIT → MIT Jun 26, 14:39 UTCJun 26, 15:39 UTC1h 0m
2026-06-25 N3584S - Jun 25, 13:50 UTCJun 25, 14:34 UTC45m
2026-06-24 N3584S - Jun 24, 15:44 UTCJun 24, 16:34 UTC50m
2026-06-23 N3584S - Jun 23, 13:50 UTCJun 23, 14:35 UTC45m
2026-06-21 N3584S - Jun 21, 22:00 UTCJun 21, 22:24 UTC25m
2026-06-21 N3584S - Jun 21, 17:15 UTCJun 21, 18:20 UTC1h 5m
2026-06-19 N3584S - Jun 19, 14:09 UTCJun 19, 15:14 UTC1h 5m
2026-06-19 N3584S - Jun 19, 01:24 UTCJun 19, 02:24 UTC1h 0m
2026-06-18 N3584S - Jun 18, 14:10 UTCJun 18, 14:40 UTC30m
2026-06-17 N3584S - Jun 17, 21:35 UTCJun 17, 23:55 UTC2h 20m
2026-06-17 N3584S - Jun 17, 19:30 UTCJun 17, 20:00 UTC30m
2026-06-17 N3584S MIT → MIT Jun 17, 14:35 UTCJun 17, 15:25 UTC50m
2026-06-16 N3584S - Jun 16, 20:25 UTCJun 16, 21:15 UTC50m
2026-06-16 N3584S - Jun 16, 17:49 UTCJun 16, 18:39 UTC50m
2026-06-16 N3584S MIT → MIT Jun 16, 15:40 UTCJun 16, 16:30 UTC50m
2026-06-16 N3584S - Jun 16, 14:20 UTCJun 16, 14:50 UTC30m
2026-06-14 N3584S - Jun 14, 20:25 UTCJun 14, 20:50 UTC25m
2026-06-14 N3584S - Jun 14, 17:35 UTCJun 14, 18:45 UTC1h 10m
2026-06-14 N3584S - Jun 14, 15:35 UTCJun 14, 16:45 UTC1h 10m
2026-06-13 N3584S MIT → MIT Jun 13, 14:00 UTCJun 13, 15:30 UTC1h 30m
2026-06-12 N3584S - Jun 12, 18:50 UTCJun 12, 19:10 UTC20m
2026-06-12 N3584S - Jun 12, 16:45 UTCJun 12, 17:25 UTC40m
2026-06-12 N3584S MIT → MIT Jun 12, 14:40 UTCJun 12, 15:30 UTC50m
2026-06-11 N3584S - Jun 11, 17:50 UTCJun 11, 18:25 UTC35m
2026-06-11 N3584S - Jun 11, 15:45 UTCJun 11, 16:25 UTC40m
2026-06-11 N3584S - Jun 11, 13:55 UTCJun 11, 14:50 UTC55m
2026-06-10 N3584S - Jun 10, 17:10 UTCJun 10, 18:05 UTC55m
2026-06-10 N3584S - Jun 10, 16:10 UTCJun 10, 16:35 UTC25m
2026-06-10 N3584S - Jun 10, 14:40 UTCJun 10, 15:20 UTC40m

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 N3584S page for operator, model, and routing details .

Mode-S A4057A frequently asked

What is Mode-S code A4057A?
A4057A is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N3584S.
Where is Mode-S A4057A registered?
Mode-S code A4057A 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 A4057A broadcasting right now?
No active broadcast right now. Last signal was 17h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A4057A, octal 51002572, decimal 10,749,306.
What flights does A4057A operate?
Mode-S A4057A has broadcast 1 distinct callsign, including N3584S.