Apparatus

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sensors Mode-S transponder

A57D05

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N4528L · AIR TRACTOR AT-302/402 · operated by SKYWORKS AVIATION LLC

Hex
A57D05
Octal
51276405
Decimal
10,845,445
Country
US
Tail
N4528L
Type
AT3T
No current signal · last broadcast 1d ago
Flights observed
91
Distinct callsigns
1
Country
US
Last broadcast
1d ago

Last known position

Most recent position reported by Mode-S A57D05.

Country allocation

The ICAO 24-bit address A57D05 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
N4528L - 89 2026-07-12

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-12 N4528L - Jul 12, 11:25 UTCJul 12, 13:55 UTC2h 30m
2026-07-11 N4528L - Jul 11, 10:35 UTCJul 11, 14:00 UTC3h 25m
2026-07-10 N4528L - Jul 10, 11:30 UTCJul 10, 12:10 UTC40m
2026-07-03 N4528L - Jul 3, 12:00 UTCJul 3, 20:40 UTC8h 40m
2026-06-30 - - Jun 30, 14:15 UTCJun 30, 14:25 UTC10m
2026-06-30 N4528L - Jun 30, 11:45 UTCJun 30, 13:00 UTC1h 15m
2026-06-29 N4528L - Jun 29, 17:49 UTCJun 29, 17:59 UTC10m
2026-06-28 N4528L - Jun 28, 11:29 UTCJun 28, 11:50 UTC20m
2026-06-27 N4528L - Jun 27, 21:15 UTCJun 27, 23:14 UTC2h 0m
2026-06-27 N4528L - Jun 27, 13:24 UTCJun 27, 16:55 UTC3h 30m
2026-06-26 N4528L - Jun 26, 13:49 UTCJun 26, 18:15 UTC4h 25m
2026-06-25 N4528L - Jun 25, 20:45 UTCJun 25, 22:39 UTC1h 55m
2026-06-25 N4528L - Jun 25, 17:34 UTCJun 25, 18:15 UTC40m
2026-06-25 N4528L - Jun 25, 12:15 UTCJun 25, 12:50 UTC35m
2026-06-24 N4528L - Jun 24, 19:44 UTCJun 24, 23:45 UTC4h 0m
2026-06-24 N4528L - Jun 24, 16:29 UTCJun 24, 17:29 UTC1h 0m
2026-06-24 N4528L - Jun 24, 11:34 UTCJun 24, 12:50 UTC1h 15m
2026-06-21 N4528L - Jun 21, 13:09 UTCJun 21, 13:20 UTC10m
2026-06-21 N4528L - Jun 21, 12:10 UTCJun 21, 12:24 UTC15m
2026-06-20 N4528L - Jun 20, 12:14 UTCJun 20, 22:39 UTC10h 25m
2026-06-19 N4528L - Jun 19, 21:49 UTCJun 19, 21:59 UTC10m
2026-06-19 N4528L - Jun 19, 20:44 UTCJun 19, 20:55 UTC10m
2026-06-18 N4528L - Jun 18, 14:10 UTCJun 18, 14:20 UTC10m
2026-06-18 N4528L - Jun 18, 12:40 UTCJun 18, 12:50 UTC10m
2026-06-15 N4528L - Jun 15, 22:54 UTCJun 15, 23:35 UTC40m
2026-06-15 N4528L - Jun 15, 11:45 UTCJun 15, 12:39 UTC55m
2026-06-14 N4528L - Jun 14, 17:40 UTCJun 14, 17:50 UTC10m
2026-06-14 N4528L - Jun 14, 16:00 UTCJun 14, 16:35 UTC35m
2026-06-14 N4528L - Jun 14, 14:35 UTCJun 14, 15:05 UTC30m
2026-06-14 N4528L - Jun 14, 11:45 UTCJun 14, 13:40 UTC1h 55m
2026-06-13 N4528L - Jun 13, 20:20 UTCJun 13, 21:35 UTC1h 15m
2026-06-13 N4528L - Jun 13, 12:10 UTCJun 13, 12:55 UTC45m
2026-06-13 N4528L - Jun 13, 10:45 UTCJun 13, 11:20 UTC35m
2026-06-12 N4528L - Jun 12, 21:00 UTCJun 12, 21:15 UTC15m
2026-06-12 N4528L - Jun 12, 15:15 UTCJun 12, 15:40 UTC25m
2026-06-12 N4528L - Jun 12, 13:40 UTCJun 12, 14:05 UTC25m
2026-06-12 N4528L - Jun 12, 12:35 UTCJun 12, 12:45 UTC10m
2026-06-11 N4528L - Jun 11, 17:30 UTCJun 11, 22:50 UTC5h 20m
2026-06-11 N4528L - Jun 11, 13:10 UTCJun 11, 17:00 UTC3h 50m
2026-06-10 - - Jun 10, 22:40 UTCJun 10, 22:50 UTC10m
2026-06-09 N4528L - Jun 9, 12:45 UTCJun 9, 13:40 UTC55m
2026-06-08 N4528L - Jun 8, 22:40 UTCJun 8, 23:50 UTC1h 10m
2026-06-08 N4528L - Jun 8, 18:10 UTCJun 8, 18:45 UTC35m
2026-06-08 N4528L - Jun 8, 14:25 UTCJun 8, 17:20 UTC2h 55m
2026-06-07 N4528L - Jun 7, 21:10 UTCJun 7, 22:10 UTC1h 0m
2026-06-06 N4528L - Jun 6, 23:00 UTCJun 6, 23:39 UTC40m
2026-06-06 N4528L - Jun 6, 12:40 UTCJun 6, 14:34 UTC1h 55m
2026-06-05 N4528L - Jun 5, 14:10 UTCJun 5, 15:20 UTC1h 10m
2026-06-05 N4528L - Jun 5, 12:20 UTCJun 5, 13:15 UTC55m
2026-06-04 N4528L - Jun 4, 23:10 UTCJun 4, 23:30 UTC20m

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 N4528L page for operator, model, and routing details .

Mode-S A57D05 frequently asked

What is Mode-S code A57D05?
A57D05 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N4528L.
Where is Mode-S A57D05 registered?
Mode-S code A57D05 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 A57D05 broadcasting right now?
No active broadcast right now. Last signal was 1d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A57D05, octal 51276405, decimal 10,845,445.
What flights does A57D05 operate?
Mode-S A57D05 has broadcast 1 distinct callsign, including N4528L.