sensors Mode-S transponder

A5A19C

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N462FX · GULFSTREAM 4 · operated by FLEXJET LLC

Hex
A5A19C
Octal
51320634
Decimal
10,854,812
Country
US
Tail
N462FX
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 A5A19C.

Country allocation

The ICAO 24-bit address A5A19C 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
LXJ462 - 7 2026-04-13

Recent flights last 7

DateFlightRouteTakeoffLandingDuration
2026-04-13 LXJ462 - Apr 13, 23:05 UTCApr 13, 23:45 UTC40m
2026-04-13 LXJ462 - Apr 13, 19:50 UTCApr 13, 21:55 UTC2h 5m
2026-04-13 LXJ462 - Apr 13, 19:10 UTCApr 13, 20:10 UTC1h 0m
2026-04-13 LXJ462 - Apr 13, 01:30 UTCApr 13, 03:10 UTC1h 40m
2026-04-13 LXJ462 - Apr 13, 00:20 UTCApr 13, 00:40 UTC20m
2026-04-12 LXJ462 - Apr 12, 23:55 UTCApr 13, 00:40 UTC45m
2026-04-12 LXJ462 - Apr 12, 17:15 UTCApr 12, 20:15 UTC3h 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 N462FX page for operator, model, and routing details .

Mode-S A5A19C frequently asked

What is Mode-S code A5A19C?
A5A19C is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N462FX.
Where is Mode-S A5A19C registered?
Mode-S code A5A19C 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 A5A19C 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 A5A19C, octal 51320634, decimal 10,854,812.
What flights does A5A19C operate?
Mode-S A5A19C has broadcast 1 distinct callsign, including LXJ462.