sensors Mode-S transponder

A5AFF9

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N466AV · operated by WESTWIND SCHOOL OF AERONAUTICS PHOENIX LLC DBA, UNITED AVIATE ACADEMY

Hex
A5AFF9
Octal
51327771
Decimal
10,858,489
Country
US
Tail
N466AV
Type
SR20
Broadcasting now · callsign VAR466 · 9,000 ft
Flights observed
5
Distinct callsigns
1
Country
US
Last broadcast
23h ago

Current position

A5AFF9 is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address A5AFF9 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
VAR466 - 5 2026-04-13

Recent flights last 5

DateFlightRouteTakeoffLandingDuration
2026-04-13 VAR466 - Apr 13, 22:45 UTCApr 13, 23:40 UTC55m
2026-04-13 VAR466 GYR → GYR Apr 13, 05:35 UTCApr 13, 05:40 UTC5m
2026-04-13 VAR466 GYR → GYR Apr 13, 05:10 UTCApr 13, 05:20 UTC10m
2026-04-13 VAR466 - Apr 13, 04:35 UTCApr 13, 04:40 UTC5m
2026-04-13 VAR466 - Apr 13, 04:20 UTCApr 13, 04:25 UTC5m

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 N466AV page for operator, model, and routing details .

Mode-S A5AFF9 frequently asked

What is Mode-S code A5AFF9?
A5AFF9 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N466AV.
Where is Mode-S A5AFF9 registered?
Mode-S code A5AFF9 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 A5AFF9 broadcasting right now?
Yes. Mode-S A5AFF9 is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A5AFF9, octal 51327771, decimal 10,858,489.
What flights does A5AFF9 operate?
Mode-S A5AFF9 has broadcast 1 distinct callsign, including VAR466.