Apparatus

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sensors Mode-S transponder

A61F08

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N494AV · operated by WESTWIND SCHOOL OF AERONAUTICS PHOENIX LLC DBA, UNITED AVIATE ACADEMY

Hex
A61F08
Octal
51417410
Decimal
10,886,920
Country
US
Tail
N494AV
Type
SR20
No current signal · last broadcast 1d ago
Flights observed
10
Distinct callsigns
1
Country
US
Last broadcast
1d ago

Last known position

Most recent position reported by Mode-S A61F08.

Country allocation

The ICAO 24-bit address A61F08 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
VAR494 - 10 2026-04-13

Recent flights last 10

DateFlightRouteTakeoffLandingDuration
2026-04-13 VAR494 GYR → BXK Apr 13, 22:15 UTCApr 13, 23:15 UTC1h 0m
2026-04-13 VAR494 - Apr 13, 19:50 UTCApr 13, 20:10 UTC20m
2026-04-13 VAR494 - Apr 13, 18:55 UTCApr 13, 20:10 UTC1h 15m
2026-04-13 VAR494 - Apr 13, 16:15 UTCApr 13, 16:35 UTC20m
2026-04-13 VAR494 - Apr 13, 15:50 UTCApr 13, 16:35 UTC45m
2026-04-13 VAR494 - Apr 13, 15:05 UTCApr 13, 16:15 UTC1h 10m
2026-04-13 VAR494 - Apr 13, 04:20 UTCApr 13, 04:50 UTC30m
2026-04-13 VAR494 - Apr 13, 03:55 UTCApr 13, 04:50 UTC55m
2026-04-13 VAR494 - Apr 13, 03:10 UTCApr 13, 04:15 UTC1h 5m
2026-04-12 VAR494 - Apr 12, 17:25 UTCApr 12, 18:25 UTC1h 0m

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 N494AV page for operator, model, and routing details .

Mode-S A61F08 frequently asked

What is Mode-S code A61F08?
A61F08 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N494AV.
Where is Mode-S A61F08 registered?
Mode-S code A61F08 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 A61F08 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 A61F08, octal 51417410, decimal 10,886,920.
What flights does A61F08 operate?
Mode-S A61F08 has broadcast 1 distinct callsign, including VAR494.