sensors Mode-S transponder

A65DBF

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N5090H · operated by ROBINSON HELICOPTER COMPANY

Hex
A65DBF
Octal
51456677
Decimal
10,902,975
Country
US
Tail
N5090H
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 A65DBF.

Country allocation

The ICAO 24-bit address A65DBF 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
SGE60 - 2 2026-04-13

Recent flights last 2

DateFlightRouteTakeoffLandingDuration
2026-04-13 SGE60 - Apr 13, 20:30 UTCApr 13, 21:55 UTC1h 25m
2026-04-13 SGE60 FTW → FTW Apr 13, 18:05 UTCApr 13, 19:30 UTC1h 25m

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 N5090H page for operator, model, and routing details .

Mode-S A65DBF frequently asked

What is Mode-S code A65DBF?
A65DBF is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N5090H.
Where is Mode-S A65DBF registered?
Mode-S code A65DBF 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 A65DBF 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 A65DBF, octal 51456677, decimal 10,902,975.
What flights does A65DBF operate?
Mode-S A65DBF has broadcast 1 distinct callsign, including SGE60.