Apparatus

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sensors Mode-S transponder

A4BF48

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N405AV · operated by WESTWIND SCHOOL OF AERONAUTICS PHOENIX LLC, UNITED AVIATE ACADEMY

Hex
A4BF48
Octal
51137510
Decimal
10,796,872
Country
US
Tail
N405AV
Type
SR20
No current signal · last broadcast Jul 26, 18:40 UTC
Flights observed
203
Distinct callsigns
1
Country
US
Last broadcast
Jul 26, 18:40 UTC

Last known position

Most recent position reported by Mode-S A4BF48.

Country allocation

The ICAO 24-bit address A4BF48 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
VAR405 - 203 2026-07-26

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 VAR405 GYR → GYR Jul 26, 17:10 UTCJul 26, 18:30 UTC1h 20m
2026-07-26 VAR405 GYR → GYR Jul 26, 14:30 UTCJul 26, 15:45 UTC1h 15m
2026-07-25 VAR405 GYR → GYR Jul 25, 20:30 UTCJul 25, 22:00 UTC1h 30m
2026-07-25 VAR405 GYR → GYR Jul 25, 17:50 UTCJul 25, 18:50 UTC1h 0m
2026-07-25 VAR405 - Jul 25, 15:50 UTCJul 25, 16:15 UTC25m
2026-07-25 VAR405 - Jul 25, 15:00 UTCJul 25, 15:45 UTC45m
2026-07-25 VAR405 GYR → GYR Jul 25, 03:55 UTCJul 25, 04:20 UTC25m
2026-07-02 VAR405 GYR → GYR Jul 2, 18:30 UTCJul 2, 20:35 UTC2h 5m
2026-07-01 VAR405 GYR → GYR Jul 1, 19:45 UTCJul 1, 20:50 UTC1h 5m
2026-07-01 VAR405 GYR → GYR Jul 1, 16:10 UTCJul 1, 17:55 UTC1h 45m
2026-07-01 VAR405 GYR → GYR Jul 1, 13:10 UTCJul 1, 14:55 UTC1h 45m
2026-07-01 VAR405 GYR → GYR Jul 1, 01:40 UTCJul 1, 03:05 UTC1h 25m
2026-06-30 VAR405 - Jun 30, 22:40 UTCJul 1, 00:00 UTC1h 20m
2026-06-30 VAR405 - Jun 30, 18:50 UTCJun 30, 20:20 UTC1h 30m
2026-06-30 VAR405 GYR → GYR Jun 30, 15:55 UTCJun 30, 17:15 UTC1h 20m
2026-06-30 VAR405 GYR → GYR Jun 30, 13:00 UTCJun 30, 14:40 UTC1h 40m
2026-06-30 VAR405 - Jun 30, 04:10 UTCJun 30, 05:50 UTC1h 40m
2026-06-29 VAR405 GYR → GYR Jun 29, 21:44 UTCJun 29, 23:25 UTC1h 40m
2026-06-29 VAR405 GYR → GYR Jun 29, 18:19 UTCJun 29, 19:54 UTC1h 35m
2026-06-29 VAR405 GYR → GYR Jun 29, 01:25 UTCJun 29, 01:44 UTC20m
2026-06-29 VAR405 GYR → GYR Jun 29, 00:54 UTCJun 29, 01:14 UTC20m
2026-06-29 VAR405 - Jun 29, 00:29 UTCJun 29, 00:44 UTC15m
2026-06-29 VAR405 GYR → GYR Jun 29, 00:00 UTCJun 29, 00:20 UTC20m
2026-06-28 VAR405 - Jun 28, 23:09 UTCJun 28, 23:29 UTC20m
2026-06-28 VAR405 GYR → GYR Jun 28, 14:45 UTCJun 28, 14:50 UTC5m
2026-06-27 VAR405 GYR → GYR Jun 27, 17:29 UTCJun 27, 18:35 UTC1h 5m
2026-06-26 VAR405 - Jun 26, 23:30 UTCJun 27, 00:10 UTC40m
2026-06-26 VAR405 - Jun 26, 21:59 UTCJun 26, 22:29 UTC30m
2026-06-26 VAR405 GYR → GYR Jun 26, 17:25 UTCJun 26, 20:40 UTC3h 15m
2026-06-25 VAR405 GYR → GYR Jun 25, 23:05 UTCJun 26, 01:20 UTC2h 15m
2026-06-25 VAR405 - Jun 25, 19:29 UTCJun 25, 20:39 UTC1h 10m
2026-06-25 VAR405 GYR → GYR Jun 25, 17:09 UTCJun 25, 18:04 UTC55m
2026-06-25 VAR405 GYR → GYR Jun 25, 02:54 UTCJun 25, 04:14 UTC1h 20m
2026-06-25 VAR405 GYR → GYR Jun 25, 00:35 UTCJun 25, 01:54 UTC1h 20m
2026-06-24 VAR405 GYR → GYR Jun 24, 22:00 UTCJun 24, 23:20 UTC1h 20m
2026-06-24 VAR405 GYR → GYR Jun 24, 15:24 UTCJun 24, 16:24 UTC1h 0m
2026-06-23 VAR405 - Jun 23, 19:19 UTCJun 23, 20:24 UTC1h 5m
2026-06-23 VAR405 - Jun 23, 17:54 UTCJun 23, 18:34 UTC40m
2026-06-18 VAR405 - Jun 18, 15:20 UTCJun 18, 16:15 UTC55m
2026-06-18 VAR405 - Jun 18, 13:40 UTCJun 18, 14:50 UTC1h 10m
2026-06-12 VAR405 GYR → GYR Jun 12, 16:05 UTCJun 12, 17:20 UTC1h 15m
2026-06-11 VAR405 GYR → GYR Jun 11, 21:30 UTCJun 11, 23:00 UTC1h 30m
2026-06-11 VAR405 - Jun 11, 17:05 UTCJun 11, 19:05 UTC2h 0m
2026-06-10 VAR405 GYR → GYR Jun 10, 21:35 UTCJun 10, 23:35 UTC2h 0m
2026-06-10 VAR405 GYR → GYR Jun 10, 19:10 UTCJun 10, 20:30 UTC1h 20m
2026-06-10 VAR405 BXK → GYR Jun 10, 17:45 UTCJun 10, 18:00 UTC15m
2026-06-10 VAR405 GYR → BXK Jun 10, 16:25 UTCJun 10, 17:40 UTC1h 15m
2026-06-10 VAR405 - Jun 10, 03:20 UTCJun 10, 04:50 UTC1h 30m
2026-06-10 VAR405 - Jun 10, 00:00 UTCJun 10, 01:35 UTC1h 35m
2026-06-09 VAR405 GYR → GYR Jun 9, 20:15 UTCJun 9, 22:20 UTC2h 5m

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 N405AV page for operator, model, and routing details .

Mode-S A4BF48 frequently asked

What is Mode-S code A4BF48?
A4BF48 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N405AV.
Where is Mode-S A4BF48 registered?
Mode-S code A4BF48 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 A4BF48 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 18:40 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A4BF48, octal 51137510, decimal 10,796,872.
What flights does A4BF48 operate?
Mode-S A4BF48 has broadcast 1 distinct callsign, including VAR405.