sensors Mode-S transponder

AB7A60

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N839GA · operated by GULFSTREAM AEROSPACE CORP

Hex
AB7A60
Octal
52675140
Decimal
11,237,984
Country
US
Tail
N839GA
No current signal · last broadcast 10d ago
Flights observed
5
Distinct callsigns
3
Country
US
Last broadcast
10d ago

Last known position

Most recent position reported by Mode-S AB7A60.

Country allocation

The ICAO 24-bit address AB7A60 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 3 distinct

Callsign Airline Flights Last seen
N839GA - 3 2026-05-18
GLF72 - 1 2026-05-19
GLF20 - 1 2026-05-10

Recent flights last 5

DateFlightRouteTakeoffLandingDuration
2026-05-19 GLF72 SAV → ATW May 19, 16:00 UTCMay 19, 17:55 UTC1h 55m
2026-05-18 N839GA SAV → SAV May 18, 15:45 UTCMay 18, 18:25 UTC2h 40m
2026-05-14 N839GA SAV → SAV May 14, 14:50 UTCMay 14, 15:20 UTC30m
2026-05-12 N839GA SAV → SAV May 12, 14:15 UTCMay 12, 15:55 UTC1h 40m
2026-05-10 GLF20 SAV → SAV May 10, 17:30 UTCMay 10, 20:30 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 N839GA page for operator, model, and routing details .

Mode-S AB7A60 frequently asked

What is Mode-S code AB7A60?
AB7A60 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N839GA.
Where is Mode-S AB7A60 registered?
Mode-S code AB7A60 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 AB7A60 broadcasting right now?
No active broadcast right now. Last signal was 10d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex AB7A60, octal 52675140, decimal 11,237,984.
What flights does AB7A60 operate?
Mode-S AB7A60 has broadcast 3 distinct callsigns, including N839GA, GLF72, GLF20.