sensors Mode-S transponder

AADA4D

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N799JS · CESSNA 525B Citation CJ3 · operated by FE CJ3 649 LLC

Hex
AADA4D
Octal
52555115
Decimal
11,197,005
Country
US
Tail
N799JS
Type
C25B
No current signal · last broadcast 1d ago
Flights observed
7
Distinct callsigns
1
Country
US
Last broadcast
1d ago

Last known position

Most recent position reported by Mode-S AADA4D.

Country allocation

The ICAO 24-bit address AADA4D 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
JRE799 - 7 2026-04-13

Recent flights last 7

DateFlightRouteTakeoffLandingDuration
2026-04-13 JRE799 - Apr 13, 19:45 UTCApr 13, 20:10 UTC25m
2026-04-13 JRE799 - Apr 13, 16:15 UTCApr 13, 19:00 UTC2h 45m
2026-04-13 JRE799 - Apr 13, 15:50 UTCApr 13, 19:00 UTC3h 10m
2026-04-13 JRE799 - Apr 13, 15:20 UTCApr 13, 16:15 UTC55m
2026-04-13 JRE799 - Apr 13, 00:20 UTCApr 13, 00:25 UTC5m
2026-04-12 JRE799 - Apr 12, 23:55 UTCApr 13, 00:25 UTC30m
2026-04-12 JRE799 - Apr 12, 17:15 UTCApr 12, 17:55 UTC40m

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 N799JS page for operator, model, and routing details .

Mode-S AADA4D frequently asked

What is Mode-S code AADA4D?
AADA4D is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N799JS.
Where is Mode-S AADA4D registered?
Mode-S code AADA4D 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 AADA4D 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 AADA4D, octal 52555115, decimal 11,197,005.
What flights does AADA4D operate?
Mode-S AADA4D has broadcast 1 distinct callsign, including JRE799.