Apparatus

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sensors Mode-S transponder

A206C9

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N23GM · PILATUS PC-12 · operated by MAIN LINE EXECUTIVE TRAVEL LLC

Hex
A206C9
Octal
50403311
Decimal
10,618,569
Country
US
Tail
N23GM
Type
PC12
Broadcasting now · callsign GPD23 · 20,000 ft
Flights observed
206
Distinct callsigns
2
Country
US
Last broadcast
1h ago

Current position

A206C9 is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address A206C9 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
GPD23 - 198 2026-07-06
N23GM - 8 2026-05-22

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-06 GPD23 - Jul 6, 11:45 UTCJul 6, 13:10 UTC1h 25m
2026-07-06 GPD23 - Jul 6, 10:10 UTCJul 6, 11:00 UTC50m
2026-07-05 GPD23 - Jul 5, 21:55 UTCJul 5, 22:45 UTC50m
2026-07-05 GPD23 - Jul 5, 20:35 UTCJul 5, 21:15 UTC40m
2026-07-05 GPD23 - Jul 5, 19:15 UTCJul 5, 19:35 UTC20m
2026-07-05 GPD23 - Jul 5, 18:20 UTCJul 5, 18:40 UTC20m
2026-07-05 GPD23 - Jul 5, 16:20 UTCJul 5, 16:40 UTC20m
2026-07-05 GPD23 - Jul 5, 14:30 UTCJul 5, 15:15 UTC45m
2026-07-04 GPD23 - Jul 4, 22:55 UTCJul 4, 23:35 UTC40m
2026-07-03 GPD23 - Jul 3, 13:25 UTCJul 3, 15:35 UTC2h 10m
2026-07-02 GPD23 - Jul 2, 20:35 UTCJul 2, 22:50 UTC2h 15m
2026-07-02 GPD23 - Jul 2, 18:15 UTCJul 2, 19:15 UTC1h 0m
2026-07-02 GPD23 - Jul 2, 16:40 UTCJul 2, 17:30 UTC50m
2026-07-02 GPD23 - Jul 2, 14:55 UTCJul 2, 15:25 UTC30m
2026-07-01 GPD23 - Jul 1, 22:25 UTCJul 1, 23:15 UTC50m
2026-07-01 GPD23 - Jul 1, 20:45 UTCJul 1, 21:30 UTC45m
2026-07-01 GPD23 HPN → HYA Jul 1, 19:30 UTCJul 1, 20:15 UTC45m
2026-07-01 GPD23 - Jul 1, 14:20 UTCJul 1, 16:20 UTC2h 0m
2026-07-01 GPD23 - Jul 1, 00:10 UTCJul 1, 01:20 UTC1h 10m
2026-06-30 GPD23 PYM → TEB Jun 30, 20:15 UTCJun 30, 21:40 UTC1h 25m
2026-06-30 GPD23 - Jun 30, 18:10 UTCJun 30, 18:25 UTC15m
2026-06-30 GPD23 - Jun 30, 16:55 UTCJun 30, 17:40 UTC45m
2026-06-30 GPD23 - Jun 30, 14:55 UTCJun 30, 15:50 UTC55m
2026-06-30 GPD23 - Jun 30, 13:30 UTCJun 30, 14:25 UTC55m
2026-06-29 GPD23 - Jun 29, 21:24 UTCJun 29, 22:00 UTC35m
2026-06-29 GPD23 - Jun 29, 19:49 UTCJun 29, 20:44 UTC55m
2026-06-29 GPD23 - Jun 29, 18:39 UTCJun 29, 19:05 UTC25m
2026-06-29 GPD23 - Jun 29, 17:10 UTCJun 29, 17:55 UTC45m
2026-06-29 GPD23 - Jun 29, 16:00 UTCJun 29, 16:19 UTC20m
2026-06-28 GPD23 - Jun 28, 21:40 UTCJun 28, 23:25 UTC1h 45m
2026-06-28 GPD23 - Jun 28, 18:40 UTCJun 28, 19:04 UTC25m
2026-06-28 GPD23 - Jun 28, 16:55 UTCJun 28, 17:50 UTC55m
2026-06-28 GPD23 OXC → BED Jun 28, 15:14 UTCJun 28, 15:55 UTC40m
2026-06-27 GPD23 OXC → BED Jun 27, 19:05 UTCJun 27, 19:34 UTC30m
2026-06-27 GPD23 OXC → BED Jun 27, 17:49 UTCJun 27, 18:24 UTC35m
2026-06-27 GPD23 OXC → BED Jun 27, 16:49 UTCJun 27, 17:20 UTC30m
2026-06-27 GPD23 OXC → BED Jun 27, 15:45 UTCJun 27, 16:04 UTC20m
2026-06-27 GPD23 OXC → BED Jun 27, 13:55 UTCJun 27, 14:09 UTC15m
2026-06-26 GPD23 OXC → BED Jun 26, 21:04 UTCJun 26, 22:25 UTC1h 20m
2026-06-26 GPD23 OXC → BED Jun 26, 19:09 UTCJun 26, 20:00 UTC50m
2026-06-25 GPD23 OXC → BED Jun 25, 20:54 UTCJun 25, 21:15 UTC20m
2026-06-25 GPD23 OXC → BED Jun 25, 19:59 UTCJun 25, 20:34 UTC35m
2026-06-25 GPD23 OXC → BED Jun 25, 17:49 UTCJun 25, 18:19 UTC30m
2026-06-25 GPD23 OXC → BED Jun 25, 14:55 UTCJun 25, 15:50 UTC55m
2026-06-25 GPD23 OXC → BED Jun 25, 12:54 UTCJun 25, 13:24 UTC30m
2026-06-24 GPD23 OXC → BED Jun 24, 20:24 UTCJun 24, 21:54 UTC1h 30m
2026-06-24 GPD23 OXC → BED Jun 24, 13:24 UTCJun 24, 15:24 UTC2h 0m
2026-06-24 GPD23 OXC → BED Jun 24, 11:50 UTCJun 24, 12:20 UTC30m
2026-06-22 GPD23 OXC → BED Jun 22, 19:14 UTCJun 22, 20:04 UTC50m
2026-06-22 GPD23 OXC → BED Jun 22, 12:49 UTCJun 22, 13:29 UTC40m

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 N23GM page for operator, model, and routing details .

Mode-S A206C9 frequently asked

What is Mode-S code A206C9?
A206C9 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N23GM.
Where is Mode-S A206C9 registered?
Mode-S code A206C9 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 A206C9 broadcasting right now?
Yes. Mode-S A206C9 is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A206C9, octal 50403311, decimal 10,618,569.
What flights does A206C9 operate?
Mode-S A206C9 has broadcast 2 distinct callsigns, including GPD23, N23GM.