sensors Mode-S transponder

A4EEED

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N417JD · CESSNA 560XL Citation XLS · operated by TRMSI INC

Hex
A4EEED
Octal
51167355
Decimal
10,809,069
Country
US
Tail
N417JD
Type
C56X
No current signal · last broadcast 1d ago
Flights observed
2
Distinct callsigns
1
Country
US
Last broadcast
1d ago

Last known position

Most recent position reported by Mode-S A4EEED.

Country allocation

The ICAO 24-bit address A4EEED 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
N417JD - 2 2026-04-13

Recent flights last 2

DateFlightRouteTakeoffLandingDuration
2026-04-13 N417JD - Apr 13, 19:50 UTCApr 13, 20:05 UTC15m
2026-04-13 N417JD SUA → BBX Apr 13, 17:55 UTCApr 13, 20:05 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 N417JD page for operator, model, and routing details .

Mode-S A4EEED frequently asked

What is Mode-S code A4EEED?
A4EEED is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N417JD.
Where is Mode-S A4EEED registered?
Mode-S code A4EEED 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 A4EEED 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 A4EEED, octal 51167355, decimal 10,809,069.
What flights does A4EEED operate?
Mode-S A4EEED has broadcast 1 distinct callsign, including N417JD.