sensors Mode-S transponder

A4CB65

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N408LT · operated by DECATHLON LLC

Hex
A4CB65
Octal
51145545
Decimal
10,799,973
Country
US
Tail
N408LT
No current signal · last broadcast 1h ago
Flights observed
7
Distinct callsigns
1
Country
US
Last broadcast
1h ago

Last known position

Most recent position reported by Mode-S A4CB65.

Country allocation

The ICAO 24-bit address A4CB65 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
N408LT - 7 2026-04-18

Recent flights last 7

DateFlightRouteTakeoffLandingDuration
2026-04-18 N408LT - Apr 18, 14:55 UTCApr 18, 16:10 UTC1h 15m
2026-04-18 N408LT - Apr 18, 13:10 UTCApr 18, 14:05 UTC55m
2026-04-16 N408LT - Apr 16, 11:29 UTCApr 16, 12:00 UTC30m
2026-04-15 N408LT - Apr 15, 17:05 UTCApr 15, 17:50 UTC45m
2026-04-14 N408LT - Apr 14, 14:30 UTCApr 14, 14:45 UTC15m
2026-04-13 N408LT - Apr 13, 19:15 UTCApr 13, 19:50 UTC35m
2026-04-12 N408LT - Apr 12, 18:00 UTCApr 12, 20:15 UTC2h 15m

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 N408LT page for operator, model, and routing details .

Mode-S A4CB65 frequently asked

What is Mode-S code A4CB65?
A4CB65 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N408LT.
Where is Mode-S A4CB65 registered?
Mode-S code A4CB65 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 A4CB65 broadcasting right now?
No active broadcast right now. Last signal was 1h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A4CB65, octal 51145545, decimal 10,799,973.
What flights does A4CB65 operate?
Mode-S A4CB65 has broadcast 1 distinct callsign, including N408LT.