sensors Mode-S transponder

A47B7C

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N38809 · PIPER PA-28-140/150/160/180 · operated by SOMERSET AIR SERVICE INC

Hex
A47B7C
Octal
51075574
Decimal
10,779,516
Country
US
Tail
N38809
Type
P28A
No current signal · last broadcast 2d ago
Flights observed
2
Distinct callsigns
1
Country
US
Last broadcast
2d ago

Last known position

Most recent position reported by Mode-S A47B7C.

Country allocation

The ICAO 24-bit address A47B7C 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
N38809 - 2 2026-04-12

Recent flights last 2

DateFlightRouteTakeoffLandingDuration
2026-04-12 N38809 - Apr 12, 19:40 UTCApr 12, 20:05 UTC25m
2026-04-12 N38809 - Apr 12, 17:15 UTCApr 12, 18:55 UTC1h 40m

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 N38809 page for operator, model, and routing details .

Mode-S A47B7C frequently asked

What is Mode-S code A47B7C?
A47B7C is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N38809.
Where is Mode-S A47B7C registered?
Mode-S code A47B7C 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 A47B7C broadcasting right now?
No active broadcast right now. Last signal was 2d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A47B7C, octal 51075574, decimal 10,779,516.
What flights does A47B7C operate?
Mode-S A47B7C has broadcast 1 distinct callsign, including N38809.