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
296
Distinct callsigns
2
Country
US
Last broadcast
25d 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 - 288 2026-07-26
N23GM - 8 2026-05-22

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 GPD23 OXC → BED Jul 26, 22:00 UTCJul 26, 22:15 UTC15m
2026-07-26 GPD23 OXC → BED Jul 26, 20:15 UTCJul 26, 20:55 UTC40m
2026-07-26 GPD23 OXC → BED Jul 26, 18:55 UTCJul 26, 19:35 UTC40m
2026-07-26 GPD23 - Jul 26, 15:50 UTCJul 26, 16:10 UTC20m
2026-07-26 GPD23 - Jul 26, 14:20 UTCJul 26, 15:20 UTC1h 0m
2026-07-26 GPD23 - Jul 26, 12:15 UTCJul 26, 13:00 UTC45m
2026-07-25 GPD23 - Jul 25, 15:20 UTCJul 25, 16:10 UTC50m
2026-07-25 GPD23 - Jul 25, 14:10 UTCJul 25, 14:55 UTC45m
2026-07-25 GPD23 - Jul 25, 13:05 UTCJul 25, 13:25 UTC20m
2026-07-24 GPD23 TEB → HPN Jul 24, 19:50 UTCJul 24, 22:10 UTC2h 20m
2026-07-24 GPD23 - Jul 24, 17:10 UTCJul 24, 17:50 UTC40m
2026-07-24 GPD23 - Jul 24, 15:25 UTCJul 24, 16:45 UTC1h 20m
2026-07-24 GPD23 - Jul 24, 14:15 UTCJul 24, 14:30 UTC15m
2026-07-24 GPD23 - Jul 24, 12:45 UTCJul 24, 13:30 UTC45m
2026-07-23 GPD23 BED → HPN Jul 23, 21:50 UTCJul 23, 22:55 UTC1h 5m
2026-07-23 GPD23 - Jul 23, 17:55 UTCJul 23, 19:05 UTC1h 10m
2026-07-23 GPD23 - Jul 23, 15:25 UTCJul 23, 16:50 UTC1h 25m
2026-07-23 GPD23 - Jul 23, 13:30 UTCJul 23, 13:45 UTC15m
2026-07-22 GPD23 - Jul 22, 23:05 UTCJul 22, 23:50 UTC45m
2026-07-22 GPD23 - Jul 22, 21:25 UTCJul 22, 22:25 UTC1h 0m
2026-07-22 GPD23 - Jul 22, 20:15 UTCJul 22, 20:50 UTC35m
2026-07-22 GPD23 IAD → NPT Jul 22, 17:25 UTCJul 22, 19:10 UTC1h 45m
2026-07-22 GPD23 - Jul 22, 14:25 UTCJul 22, 15:40 UTC1h 15m
2026-07-21 GPD23 - Jul 21, 18:55 UTCJul 21, 20:05 UTC1h 10m
2026-07-21 GPD23 - Jul 21, 14:40 UTCJul 21, 15:20 UTC40m
2026-07-20 GPD23 - Jul 20, 19:10 UTCJul 20, 19:50 UTC40m
2026-07-20 GPD23 - Jul 20, 17:35 UTCJul 20, 18:35 UTC1h 0m
2026-07-20 GPD23 BLM → RKD Jul 20, 14:30 UTCJul 20, 15:55 UTC1h 25m
2026-07-20 GPD23 - Jul 20, 12:05 UTCJul 20, 13:55 UTC1h 50m
2026-07-19 GPD23 - Jul 19, 23:50 UTCJul 20, 00:10 UTC20m
2026-07-19 GPD23 - Jul 19, 20:45 UTCJul 19, 23:00 UTC2h 15m
2026-07-19 GPD23 - Jul 19, 18:45 UTCJul 19, 18:55 UTC10m
2026-07-19 GPD23 - Jul 19, 12:10 UTCJul 19, 14:20 UTC2h 10m
2026-07-19 GPD23 - Jul 19, 11:00 UTCJul 19, 11:20 UTC20m
2026-07-19 GPD23 - Jul 19, 01:30 UTCJul 19, 02:05 UTC35m
2026-07-18 GPD23 - Jul 18, 23:50 UTCJul 19, 00:30 UTC40m
2026-07-18 GPD23 - Jul 18, 22:15 UTCJul 18, 22:55 UTC40m
2026-07-18 GPD23 - Jul 18, 20:20 UTCJul 18, 20:50 UTC30m
2026-07-18 GPD23 - Jul 18, 15:20 UTCJul 18, 15:55 UTC35m
2026-07-18 GPD23 - Jul 18, 14:00 UTCJul 18, 14:35 UTC35m
2026-07-17 GPD23 - Jul 17, 21:00 UTCJul 17, 21:20 UTC20m
2026-07-17 GPD23 - Jul 17, 20:04 UTCJul 17, 20:29 UTC25m
2026-07-17 GPD23 - Jul 17, 17:25 UTCJul 17, 18:00 UTC35m
2026-07-17 GPD23 - Jul 17, 16:24 UTCJul 17, 16:49 UTC25m
2026-07-17 GPD23 - Jul 17, 14:04 UTCJul 17, 14:39 UTC35m
2026-07-17 GPD23 - Jul 17, 12:19 UTCJul 17, 13:05 UTC45m
2026-07-17 GPD23 - Jul 17, 10:44 UTCJul 17, 11:25 UTC40m
2026-07-16 GPD23 - Jul 16, 21:25 UTCJul 16, 22:10 UTC45m
2026-07-16 GPD23 - Jul 16, 19:55 UTCJul 16, 20:45 UTC50m
2026-07-16 GPD23 - Jul 16, 15:45 UTCJul 16, 16:19 UTC35m

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.