sensors Mode-S transponder

A08D11

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N13447 · CESSNA 172 Skyhawk · operated by VESSICHELLI RYAN A

Hex
A08D11
Octal
50106421
Decimal
10,521,873
Country
US
Tail
N13447
Type
C172
No current signal · last broadcast 12h ago
Flights observed
5
Distinct callsigns
1
Country
US
Last broadcast
12h ago

Last known position

Most recent position reported by Mode-S A08D11.

Country allocation

The ICAO 24-bit address A08D11 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
N13447 - 5 2026-04-14

Recent flights last 5

DateFlightRouteTakeoffLandingDuration
2026-04-14 N13447 - Apr 14, 10:35 UTCApr 14, 11:05 UTC30m
2026-04-13 N13447 - Apr 13, 14:50 UTCApr 13, 15:45 UTC55m
2026-04-13 N13447 - Apr 13, 12:50 UTCApr 13, 13:50 UTC1h 0m
2026-04-13 N13447 - Apr 13, 01:00 UTCApr 13, 02:55 UTC1h 55m
2026-04-12 N13447 - Apr 12, 17:45 UTCApr 12, 19:55 UTC2h 10m

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 N13447 page for operator, model, and routing details .

Mode-S A08D11 frequently asked

What is Mode-S code A08D11?
A08D11 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N13447.
Where is Mode-S A08D11 registered?
Mode-S code A08D11 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 A08D11 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 A08D11, octal 50106421, decimal 10,521,873.
What flights does A08D11 operate?
Mode-S A08D11 has broadcast 1 distinct callsign, including N13447.