Apparatus

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sensors Mode-S transponder

A4DF59

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N413AV · operated by WESTWIND SCHOOL OF AERONAUTICS PHOENIX LLC DBA, UNITED AVIATE ACADEMY

Hex
A4DF59
Octal
51157531
Decimal
10,805,081
Country
US
Tail
N413AV
Type
SR20
No current signal · last broadcast 15h ago
Flights observed
204
Distinct callsigns
1
Country
US
Last broadcast
15h ago

Last known position

Most recent position reported by Mode-S A4DF59.

Country allocation

The ICAO 24-bit address A4DF59 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
VAR413 - 204 2026-07-13

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-13 VAR413 GYR → GYR Jul 13, 18:20 UTCJul 13, 19:45 UTC1h 25m
2026-07-11 VAR413 GYR → GYR Jul 11, 15:35 UTCJul 11, 16:10 UTC35m
2026-07-11 VAR413 - Jul 11, 00:00 UTCJul 11, 00:35 UTC35m
2026-07-10 VAR413 - Jul 10, 22:25 UTCJul 10, 23:25 UTC1h 0m
2026-07-09 VAR413 - Jul 9, 19:20 UTCJul 9, 20:25 UTC1h 5m
2026-07-02 VAR413 - Jul 2, 16:35 UTCJul 2, 17:30 UTC55m
2026-07-02 VAR413 - Jul 2, 14:40 UTCJul 2, 16:00 UTC1h 20m
2026-07-02 VAR413 - Jul 2, 02:20 UTCJul 2, 02:35 UTC15m
2026-07-02 VAR413 - Jul 2, 00:50 UTCJul 2, 01:10 UTC20m
2026-07-01 VAR413 - Jul 1, 22:00 UTCJul 1, 23:30 UTC1h 30m
2026-07-01 VAR413 GYR → GYR Jul 1, 19:05 UTCJul 1, 20:35 UTC1h 30m
2026-07-01 VAR413 BXK → GYR Jul 1, 02:15 UTCJul 1, 02:30 UTC15m
2026-06-29 VAR413 GYR → BXK Jun 29, 22:10 UTCJun 29, 23:19 UTC1h 10m
2026-06-29 VAR413 GYR → GYR Jun 29, 15:34 UTCJun 29, 17:24 UTC1h 50m
2026-06-28 VAR413 GYR → GYR Jun 28, 17:19 UTCJun 28, 18:44 UTC1h 25m
2026-06-28 VAR413 GYR → GYR Jun 28, 13:49 UTCJun 28, 15:09 UTC1h 20m
2026-06-28 VAR413 - Jun 28, 02:34 UTCJun 28, 03:09 UTC35m
2026-06-27 VAR413 - Jun 27, 23:34 UTCJun 28, 00:30 UTC55m
2026-06-27 VAR413 - Jun 27, 16:10 UTCJun 27, 17:44 UTC1h 35m
2026-06-27 VAR413 - Jun 27, 14:54 UTCJun 27, 15:10 UTC15m
2026-06-27 VAR413 - Jun 27, 13:35 UTCJun 27, 14:45 UTC1h 10m
2026-06-26 VAR413 GYR → GYR Jun 26, 20:59 UTCJun 26, 21:55 UTC55m
2026-06-26 VAR413 - Jun 26, 18:20 UTCJun 26, 19:24 UTC1h 5m
2026-06-26 VAR413 - Jun 26, 15:20 UTCJun 26, 16:44 UTC1h 25m
2026-06-25 VAR413 GYR → GYR Jun 25, 20:34 UTCJun 25, 20:59 UTC25m
2026-06-25 VAR413 GYR → GYR Jun 25, 17:39 UTCJun 25, 18:10 UTC30m
2026-06-25 VAR413 GYR → GYR Jun 25, 14:44 UTCJun 25, 15:54 UTC1h 10m
2026-06-25 VAR413 - Jun 25, 04:45 UTCJun 25, 05:25 UTC40m
2026-06-25 VAR413 GYR → GYR Jun 25, 04:04 UTCJun 25, 04:40 UTC35m
2026-06-24 VAR413 GYR → GYR Jun 24, 18:39 UTCJun 24, 19:55 UTC1h 15m
2026-06-24 VAR413 GYR → GYR Jun 24, 14:15 UTCJun 24, 15:14 UTC1h 0m
2026-06-23 VAR413 GYR → GYR Jun 23, 13:55 UTCJun 23, 15:30 UTC1h 35m
2026-06-23 VAR413 GYR → GYR Jun 23, 01:54 UTCJun 23, 02:29 UTC35m
2026-06-22 VAR413 GYR → GYR Jun 22, 23:05 UTCJun 22, 23:45 UTC40m
2026-06-22 VAR413 GYR → GYR Jun 22, 19:40 UTCJun 22, 21:19 UTC1h 40m
2026-06-22 VAR413 GYR → GYR Jun 22, 16:54 UTCJun 22, 18:44 UTC1h 50m
2026-06-20 VAR413 GYR → GYR Jun 20, 20:14 UTCJun 20, 21:14 UTC1h 0m
2026-06-20 VAR413 GYR → GYR Jun 20, 17:24 UTCJun 20, 18:45 UTC1h 20m
2026-06-20 VAR413 - Jun 20, 15:34 UTCJun 20, 15:49 UTC15m
2026-06-20 VAR413 - Jun 20, 14:05 UTCJun 20, 14:59 UTC55m
2026-06-20 VAR413 GYR → GYR Jun 20, 00:54 UTCJun 20, 02:09 UTC1h 15m
2026-06-19 VAR413 GYR → GYR Jun 19, 18:20 UTCJun 19, 19:04 UTC45m
2026-06-19 VAR413 GYR → GYR Jun 19, 15:29 UTCJun 19, 16:19 UTC50m
2026-06-14 VAR413 GYR → GYR Jun 14, 01:15 UTCJun 14, 01:55 UTC40m
2026-06-13 VAR413 GYR → GYR Jun 13, 18:55 UTCJun 13, 19:00 UTC5m
2026-06-13 VAR413 GYR → GYR Jun 13, 17:25 UTCJun 13, 18:50 UTC1h 25m
2026-06-13 VAR413 - Jun 13, 15:25 UTCJun 13, 15:35 UTC10m
2026-06-13 VAR413 GYR → GYR Jun 13, 15:00 UTCJun 13, 15:20 UTC20m
2026-06-13 VAR413 GYR → GYR Jun 13, 03:45 UTCJun 13, 05:15 UTC1h 29m
2026-06-12 VAR413 GYR → GYR Jun 12, 22:10 UTCJun 12, 23:30 UTC1h 20m

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 N413AV page for operator, model, and routing details .

Mode-S A4DF59 frequently asked

What is Mode-S code A4DF59?
A4DF59 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N413AV.
Where is Mode-S A4DF59 registered?
Mode-S code A4DF59 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 A4DF59 broadcasting right now?
No active broadcast right now. Last signal was 15h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A4DF59, octal 51157531, decimal 10,805,081.
What flights does A4DF59 operate?
Mode-S A4DF59 has broadcast 1 distinct callsign, including VAR413.