Apparatus

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sensors Mode-S transponder

A523BF

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N430GL · operated by GREG FOGLE

Hex
A523BF
Octal
51221677
Decimal
10,822,591
Country
US
Tail
N430GL
No current signal · last broadcast 1d ago
Flights observed
21
Distinct callsigns
1
Country
US
Last broadcast
1d ago

Last known position

Most recent position reported by Mode-S A523BF.

Country allocation

The ICAO 24-bit address A523BF 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
N430GL - 21 2026-07-13

Recent flights last 21

DateFlightRouteTakeoffLandingDuration
2026-07-13 N430GL - Jul 13, 00:45 UTCJul 13, 01:20 UTC35m
2026-07-12 N430GL - Jul 12, 23:50 UTCJul 13, 00:10 UTC20m
2026-07-05 N430GL - Jul 5, 12:55 UTCJul 5, 16:00 UTC3h 5m
2026-07-02 N430GL - Jul 2, 15:50 UTCJul 2, 18:00 UTC2h 10m
2026-07-02 N430GL - Jul 2, 14:55 UTCJul 2, 15:20 UTC25m
2026-06-28 N430GL - Jun 28, 18:59 UTCJun 28, 19:44 UTC45m
2026-06-20 N430GL - Jun 20, 18:19 UTCJun 20, 19:24 UTC1h 5m
2026-06-20 N430GL - Jun 20, 12:45 UTCJun 20, 13:44 UTC1h 0m
2026-06-17 N430GL - Jun 17, 15:55 UTCJun 17, 17:00 UTC1h 5m
2026-06-17 N430GL - Jun 17, 14:50 UTCJun 17, 15:20 UTC30m
2026-06-17 N430GL - Jun 17, 12:15 UTCJun 17, 14:00 UTC1h 45m
2026-06-16 N430GL - Jun 16, 15:00 UTCJun 16, 17:05 UTC2h 5m
2026-06-16 N430GL - Jun 16, 13:40 UTCJun 16, 14:09 UTC30m
2026-06-12 N430GL - Jun 12, 15:40 UTCJun 12, 16:15 UTC35m
2026-06-11 N430GL - Jun 11, 18:05 UTCJun 11, 20:25 UTC2h 20m
2026-06-11 N430GL - Jun 11, 16:10 UTCJun 11, 17:05 UTC55m
2026-06-11 N430GL - Jun 11, 11:55 UTCJun 11, 13:30 UTC1h 35m
2026-06-10 N430GL - Jun 10, 01:00 UTCJun 10, 01:45 UTC45m
2026-06-05 N430GL - Jun 5, 20:30 UTCJun 5, 20:50 UTC20m
2026-04-17 N430GL - Apr 17, 19:25 UTCApr 17, 19:40 UTC15m
2026-04-17 N430GL - Apr 17, 12:20 UTCApr 17, 12:50 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 N430GL page for operator, model, and routing details .

Mode-S A523BF frequently asked

What is Mode-S code A523BF?
A523BF is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N430GL.
Where is Mode-S A523BF registered?
Mode-S code A523BF 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 A523BF 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 A523BF, octal 51221677, decimal 10,822,591.
What flights does A523BF operate?
Mode-S A523BF has broadcast 1 distinct callsign, including N430GL.