sensors Mode-S transponder

A9CBDB

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N730JH · BOMBARDIER BD-100 Challenger 350

Hex
A9CBDB
Octal
52345733
Decimal
11,127,771
Country
US
Tail
N730JH
Type
CL35
No current signal · last broadcast 22h ago
Flights observed
5
Distinct callsigns
1
Country
US
Last broadcast
22h ago

Last known position

Most recent position reported by Mode-S A9CBDB.

Country allocation

The ICAO 24-bit address A9CBDB 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
CBE17 - 5 2026-04-14

Recent flights last 5

DateFlightRouteTakeoffLandingDuration
2026-04-14 CBE17 - Apr 14, 08:50 UTCApr 14, 09:05 UTC15m
2026-04-13 CBE17 - Apr 13, 14:30 UTCApr 13, 20:28 UTC5h 58m
2026-04-13 CBE17 - Apr 13, 12:20 UTCApr 13, 13:35 UTC1h 15m
2026-04-13 CBE17 - Apr 13, 11:55 UTCApr 13, 13:35 UTC1h 40m
2026-04-13 CBE17 - Apr 13, 11:20 UTCApr 13, 12:15 UTC55m

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 N730JH page for operator, model, and routing details .

Mode-S A9CBDB frequently asked

What is Mode-S code A9CBDB?
A9CBDB is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N730JH.
Where is Mode-S A9CBDB registered?
Mode-S code A9CBDB 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 A9CBDB broadcasting right now?
No active broadcast right now. Last signal was 22h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A9CBDB, octal 52345733, decimal 11,127,771.
What flights does A9CBDB operate?
Mode-S A9CBDB has broadcast 1 distinct callsign, including CBE17.