Apparatus

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sensors Mode-S transponder

A5D3C1

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N475AV · operated by WESTWIND SCHOOL OF AERONAUTICS PHOENIX LLC DBA, UNITED AVIATE ACADEMY

Hex
A5D3C1
Octal
51351701
Decimal
10,867,649
Country
US
Tail
N475AV
Type
SR20
No current signal · last broadcast 17h ago
Flights observed
136
Distinct callsigns
1
Country
US
Last broadcast
17h ago

Last known position

Most recent position reported by Mode-S A5D3C1.

Country allocation

The ICAO 24-bit address A5D3C1 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
VAR475 - 136 2026-07-17

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-17 VAR475 - Jul 17, 16:24 UTCJul 17, 17:30 UTC1h 5m
2026-07-17 VAR475 - Jul 17, 14:50 UTCJul 17, 15:35 UTC45m
2026-07-16 VAR475 GYR → GYR Jul 16, 14:40 UTCJul 16, 16:55 UTC2h 15m
2026-06-26 VAR475 - Jun 26, 01:39 UTCJun 26, 03:10 UTC1h 30m
2026-06-25 VAR475 - Jun 25, 23:30 UTCJun 25, 23:49 UTC20m
2026-06-25 VAR475 - Jun 25, 21:10 UTCJun 25, 21:59 UTC50m
2026-06-23 VAR475 - Jun 23, 01:30 UTCJun 23, 03:20 UTC1h 50m
2026-06-22 VAR475 GYR → GYR Jun 22, 22:49 UTCJun 23, 00:39 UTC1h 50m
2026-06-22 VAR475 GYR → GYR Jun 22, 19:14 UTCJun 22, 21:25 UTC2h 10m
2026-06-22 VAR475 GYR → GYR Jun 22, 15:50 UTCJun 22, 16:40 UTC50m
2026-06-20 VAR475 GYR → GYR Jun 20, 16:05 UTCJun 20, 17:54 UTC1h 50m
2026-06-20 VAR475 GYR → GYR Jun 20, 00:39 UTCJun 20, 02:09 UTC1h 30m
2026-06-19 VAR475 GYR → GYR Jun 19, 19:59 UTCJun 19, 21:39 UTC1h 40m
2026-06-19 VAR475 GYR → GYR Jun 19, 16:14 UTCJun 19, 18:30 UTC2h 15m
2026-06-19 VAR475 GYR → GYR Jun 19, 13:54 UTCJun 19, 14:44 UTC50m
2026-06-19 VAR475 GYR → GYR Jun 19, 04:19 UTCJun 19, 05:14 UTC55m
2026-06-19 VAR475 GYR → GYR Jun 19, 00:59 UTCJun 19, 02:24 UTC1h 25m
2026-06-18 VAR475 GYR → GYR Jun 18, 19:30 UTCJun 18, 21:15 UTC1h 45m
2026-06-18 VAR475 GYR → GYR Jun 18, 18:20 UTCJun 18, 18:25 UTC5m
2026-06-18 VAR475 GYR → GYR Jun 18, 01:45 UTCJun 18, 05:15 UTC3h 30m
2026-06-17 VAR475 GYR → GYR Jun 17, 16:10 UTCJun 17, 18:10 UTC2h 0m
2026-06-17 VAR475 - Jun 17, 01:55 UTCJun 17, 03:55 UTC2h 0m
2026-06-16 VAR475 GYR → GYR Jun 16, 22:55 UTCJun 17, 00:45 UTC1h 50m
2026-06-16 VAR475 GYR → GYR Jun 16, 19:50 UTCJun 16, 21:40 UTC1h 50m
2026-06-16 VAR475 - Jun 16, 17:10 UTCJun 16, 18:15 UTC1h 5m
2026-06-16 VAR475 - Jun 16, 15:30 UTCJun 16, 16:30 UTC1h 0m
2026-06-15 VAR475 GYR → GYR Jun 15, 03:10 UTCJun 15, 04:04 UTC55m
2026-06-14 VAR475 GYR → GYR Jun 14, 23:39 UTCJun 15, 01:45 UTC2h 5m
2026-06-14 VAR475 - Jun 14, 20:50 UTCJun 14, 22:20 UTC1h 30m
2026-06-14 VAR475 - Jun 14, 20:15 UTCJun 14, 20:45 UTC30m
2026-06-14 VAR475 - Jun 14, 05:50 UTCJun 14, 06:35 UTC45m
2026-06-14 VAR475 - Jun 14, 04:10 UTCJun 14, 05:00 UTC50m
2026-06-14 VAR475 GYR → GYR Jun 14, 00:20 UTCJun 14, 01:35 UTC1h 15m
2026-06-13 VAR475 - Jun 13, 21:50 UTCJun 13, 23:25 UTC1h 35m
2026-06-13 VAR475 GYR → GYR Jun 13, 18:50 UTCJun 13, 20:55 UTC2h 5m
2026-06-13 VAR475 - Jun 13, 14:25 UTCJun 13, 15:05 UTC40m
2026-06-10 VAR475 - Jun 10, 18:45 UTCJun 10, 19:45 UTC1h 0m
2026-06-10 VAR475 - Jun 10, 15:10 UTCJun 10, 16:10 UTC1h 0m
2026-06-09 VAR475 GYR → GYR Jun 9, 21:20 UTCJun 9, 21:55 UTC35m
2026-06-09 VAR475 GYR → GYR Jun 9, 17:55 UTCJun 9, 20:30 UTC2h 35m
2026-06-09 VAR475 GYR → GYR Jun 9, 13:30 UTCJun 9, 15:10 UTC1h 40m
2026-06-09 VAR475 GYR → GYR Jun 9, 04:55 UTCJun 9, 05:05 UTC10m
2026-06-09 VAR475 GYR → GYR Jun 9, 04:10 UTCJun 9, 04:20 UTC10m
2026-06-09 VAR475 GYR → GYR Jun 9, 03:55 UTCJun 9, 04:00 UTC5m
2026-06-09 VAR475 GYR → GYR Jun 9, 03:30 UTCJun 9, 03:35 UTC5m
2026-06-07 VAR475 - Jun 7, 06:15 UTCJun 7, 07:30 UTC1h 15m
2026-06-07 VAR475 - Jun 7, 04:45 UTCJun 7, 05:25 UTC40m
2026-06-07 VAR475 - Jun 7, 03:15 UTCJun 7, 03:50 UTC35m
2026-06-07 VAR475 - Jun 7, 01:20 UTCJun 7, 02:35 UTC1h 15m
2026-06-05 VAR475 GYR → GYR Jun 5, 00:15 UTCJun 5, 01:35 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 N475AV page for operator, model, and routing details .

Mode-S A5D3C1 frequently asked

What is Mode-S code A5D3C1?
A5D3C1 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N475AV.
Where is Mode-S A5D3C1 registered?
Mode-S code A5D3C1 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 A5D3C1 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 A5D3C1, octal 51351701, decimal 10,867,649.
What flights does A5D3C1 operate?
Mode-S A5D3C1 has broadcast 1 distinct callsign, including VAR475.