Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

A1F3A1

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N225AN · CESSNA 172 Skyhawk · operated by CALIFORNIA IN NICE INC

Hex
A1F3A1
Octal
50371641
Decimal
10,613,665
Country
US
Tail
N225AN
Type
C172
No current signal · last broadcast 1d ago
Flights observed
13
Distinct callsigns
1
Country
US
Last broadcast
1d ago

Last known position

Most recent position reported by Mode-S A1F3A1.

Country allocation

The ICAO 24-bit address A1F3A1 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
N225AN - 13 2026-04-13

Recent flights last 13

DateFlightRouteTakeoffLandingDuration
2026-04-13 N225AN - Apr 13, 22:25 UTCApr 13, 23:40 UTC1h 15m
2026-04-13 N225AN RHV → RHV Apr 13, 19:30 UTCApr 13, 19:40 UTC10m
2026-04-13 N225AN RHV → RHV Apr 13, 19:05 UTCApr 13, 19:10 UTC5m
2026-04-13 N225AN RHV → RHV Apr 13, 18:50 UTCApr 13, 19:00 UTC10m
2026-04-13 N225AN RHV → RHV Apr 13, 18:35 UTCApr 13, 18:40 UTC5m
2026-04-13 N225AN RHV → RHV Apr 13, 16:20 UTCApr 13, 16:30 UTC10m
2026-04-13 N225AN RHV → RHV Apr 13, 16:05 UTCApr 13, 16:15 UTC10m
2026-04-13 N225AN RHV → RHV Apr 13, 15:45 UTCApr 13, 16:00 UTC15m
2026-04-12 N225AN RHV → RHV Apr 12, 19:25 UTCApr 12, 19:30 UTC5m
2026-04-12 N225AN RHV → RHV Apr 12, 19:05 UTCApr 12, 19:20 UTC15m
2026-04-12 N225AN RHV → RHV Apr 12, 18:30 UTCApr 12, 19:00 UTC30m
2026-04-12 N225AN RHV → RHV Apr 12, 18:15 UTCApr 12, 18:25 UTC10m
2026-04-12 N225AN RHV → RHV Apr 12, 18:00 UTCApr 12, 18:10 UTC10m

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 N225AN page for operator, model, and routing details .

Mode-S A1F3A1 frequently asked

What is Mode-S code A1F3A1?
A1F3A1 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N225AN.
Where is Mode-S A1F3A1 registered?
Mode-S code A1F3A1 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 A1F3A1 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 A1F3A1, octal 50371641, decimal 10,613,665.
What flights does A1F3A1 operate?
Mode-S A1F3A1 has broadcast 1 distinct callsign, including N225AN.