sensors Mode-S transponder

A5BB9D

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N469FX · GULFSTREAM 4 · operated by FLEXJET LLC

Hex
A5BB9D
Octal
51335635
Decimal
10,861,469
Country
US
Tail
N469FX
Type
GLF4
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 A5BB9D.

Country allocation

The ICAO 24-bit address A5BB9D 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
LXJ469 - 7 2026-04-13

Recent flights last 7

DateFlightRouteTakeoffLandingDuration
2026-04-13 LXJ469 - Apr 13, 21:20 UTCApr 13, 21:45 UTC25m
2026-04-13 LXJ469 - Apr 13, 19:50 UTCApr 13, 20:00 UTC10m
2026-04-13 LXJ469 YYZ → CLE Apr 13, 19:25 UTCApr 13, 20:00 UTC35m
2026-04-13 LXJ469 - Apr 13, 16:15 UTCApr 13, 18:25 UTC2h 10m
2026-04-13 LXJ469 - Apr 13, 15:55 UTCApr 13, 16:15 UTC20m
2026-04-12 LXJ469 - Apr 12, 23:55 UTCApr 13, 00:20 UTC25m
2026-04-12 LXJ469 - Apr 12, 18:30 UTCApr 12, 19:30 UTC1h 0m

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 N469FX page for operator, model, and routing details .

Mode-S A5BB9D frequently asked

What is Mode-S code A5BB9D?
A5BB9D is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N469FX.
Where is Mode-S A5BB9D registered?
Mode-S code A5BB9D 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 A5BB9D 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 A5BB9D, octal 51335635, decimal 10,861,469.
What flights does A5BB9D operate?
Mode-S A5BB9D has broadcast 1 distinct callsign, including LXJ469.