sensors Mode-S transponder

A0A9FE

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N1419D · CESSNA 172 Skyhawk · operated by AIR AMERICA FLIGHT CENTER LLC

Hex
A0A9FE
Octal
50124776
Decimal
10,529,278
Country
US
Tail
N1419D
Type
C172
No current signal · last broadcast 12h ago
Flights observed
11
Distinct callsigns
1
Country
US
Last broadcast
12h ago

Last known position

Most recent position reported by Mode-S A0A9FE.

Country allocation

The ICAO 24-bit address A0A9FE 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
N1419D - 11 2026-04-14

Recent flights last 11

DateFlightRouteTakeoffLandingDuration
2026-04-14 N1419D - Apr 14, 10:45 UTCApr 14, 11:05 UTC20m
2026-04-13 N1419D - Apr 13, 21:45 UTCApr 13, 23:40 UTC1h 55m
2026-04-13 N1419D - Apr 13, 20:00 UTCApr 13, 20:10 UTC10m
2026-04-13 N1419D - Apr 13, 17:30 UTCApr 13, 19:00 UTC1h 30m
2026-04-13 N1419D - Apr 13, 11:55 UTCApr 13, 12:05 UTC10m
2026-04-13 N1419D - Apr 13, 10:55 UTCApr 13, 12:05 UTC1h 10m
2026-04-13 N1419D - Apr 13, 01:50 UTCApr 13, 02:55 UTC1h 5m
2026-04-12 N1419D - Apr 12, 23:55 UTCApr 13, 00:15 UTC20m
2026-04-12 N1419D DAB → DAB Apr 12, 19:45 UTCApr 12, 20:05 UTC20m
2026-04-12 N1419D - Apr 12, 18:05 UTCApr 12, 18:45 UTC40m
2026-04-12 N1419D - Apr 12, 17:15 UTCApr 12, 17:30 UTC15m

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 N1419D page for operator, model, and routing details .

Mode-S A0A9FE frequently asked

What is Mode-S code A0A9FE?
A0A9FE is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N1419D.
Where is Mode-S A0A9FE registered?
Mode-S code A0A9FE 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 A0A9FE broadcasting right now?
No active broadcast right now. Last signal was 12h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A0A9FE, octal 50124776, decimal 10,529,278.
What flights does A0A9FE operate?
Mode-S A0A9FE has broadcast 1 distinct callsign, including N1419D.