Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

A9CBA5

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N730GD · operated by GULFSTREAM AEROSPACE CORP.

Hex
A9CBA5
Octal
52345645
Decimal
11,127,717
Country
US
Tail
N730GD
No current signal · last broadcast 22d ago
Flights observed
4
Distinct callsigns
2
Country
US
Last broadcast
22d ago

Last known position

Most recent position reported by Mode-S A9CBA5.

Country allocation

The ICAO 24-bit address A9CBA5 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 2 distinct

Callsign Airline Flights Last seen
GLF96 - 1 2026-05-26
GLF30 - 1 2026-05-21

Recent flights last 4

DateFlightRouteTakeoffLandingDuration
2026-05-26 GLF96 SAV → SAV May 26, 13:15 UTCMay 26, 16:00 UTC2h 45m
2026-05-21 GLF30 SAV → SAV May 21, 22:05 UTCMay 22, 00:00 UTC1h 55m
2026-04-28 - SAV → SAV Apr 28, 04:10 UTCApr 28, 04:15 UTC5m
2026-04-27 - SAV → SAV Apr 27, 23:00 UTCApr 27, 23:30 UTC30m

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 N730GD page for operator, model, and routing details .

Mode-S A9CBA5 frequently asked

What is Mode-S code A9CBA5?
A9CBA5 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N730GD.
Where is Mode-S A9CBA5 registered?
Mode-S code A9CBA5 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 A9CBA5 broadcasting right now?
No active broadcast right now. Last signal was 22d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A9CBA5, octal 52345645, decimal 11,127,717.
What flights does A9CBA5 operate?
Mode-S A9CBA5 has broadcast 2 distinct callsigns, including GLF96, GLF30.