Apparatus

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sensors Mode-S transponder

A3C9E2

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N343QS · EMBRAER EMB-505 Phenom 300 · operated by NETJETS SALES INC, NETJETS AVIATION INC

Hex
A3C9E2
Octal
50744742
Decimal
10,734,050
Country
US
Tail
N343QS
Type
E55P
No current signal · last broadcast 9h ago
Flights observed
93
Distinct callsigns
1
Country
US
Last broadcast
9h ago

Last known position

Most recent position reported by Mode-S A3C9E2.

Country allocation

The ICAO 24-bit address A3C9E2 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
EJA343 NetJets 93 2026-05-29

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-05-29 EJA343 SLK → HPN May 29, 19:10 UTCMay 29, 20:25 UTC1h 15m
2026-05-29 EJA343 SLK → HPN May 29, 16:05 UTCMay 29, 17:45 UTC1h 40m
2026-05-29 EJA343 SLK → HPN May 29, 14:45 UTCMay 29, 15:15 UTC30m
2026-05-29 EJA343 SLK → HPN May 29, 12:25 UTCMay 29, 14:05 UTC1h 40m
2026-05-28 EJA343 SLK → HPN May 28, 22:15 UTCMay 28, 22:45 UTC30m
2026-05-28 EJA343 SLK → HPN May 28, 21:10 UTCMay 28, 21:25 UTC15m
2026-05-28 EJA343 SLK → HPN May 28, 18:40 UTCMay 28, 20:30 UTC1h 50m
2026-05-28 EJA343 SLK → HPN May 28, 17:00 UTCMay 28, 17:10 UTC10m
2026-05-17 EJA343 SLK → HPN May 17, 20:30 UTCMay 17, 22:05 UTC1h 35m
2026-05-17 EJA343 SLK → HPN May 17, 17:05 UTCMay 17, 19:45 UTC2h 40m
2026-05-17 EJA343 SLK → HPN May 17, 14:50 UTCMay 17, 15:55 UTC1h 5m
2026-05-11 EJA343 SLK → HPN May 11, 16:05 UTCMay 11, 20:10 UTC4h 6m
2026-05-11 EJA343 SLK → HPN May 11, 14:00 UTCMay 11, 14:45 UTC45m
2026-05-11 EJA343 SLK → HPN May 11, 02:15 UTCMay 11, 06:15 UTC4h 0m
2026-05-10 EJA343 SLK → HPN May 10, 22:25 UTCMay 11, 00:34 UTC2h 10m
2026-05-10 EJA343 SLK → HPN May 10, 20:45 UTCMay 10, 21:14 UTC30m
2026-05-09 EJA343 SLK → HPN May 9, 20:44 UTCMay 9, 21:09 UTC25m
2026-05-09 EJA343 SLK → HPN May 9, 15:20 UTCMay 9, 17:10 UTC1h 50m
2026-05-08 EJA343 SLK → HPN May 8, 20:15 UTCMay 8, 22:05 UTC1h 50m
2026-05-08 EJA343 SLK → HPN May 8, 13:50 UTCMay 8, 15:05 UTC1h 15m
2026-05-08 EJA343 SLK → HPN May 8, 12:25 UTCMay 8, 13:05 UTC40m
2026-05-07 EJA343 SLK → HPN May 7, 11:20 UTCMay 7, 11:25 UTC5m
2026-05-06 EJA343 SLK → HPN May 6, 21:10 UTCMay 6, 21:55 UTC45m
2026-05-01 EJA343 SLK → HPN May 1, 17:55 UTCMay 1, 19:35 UTC1h 40m
2026-05-01 EJA343 SLK → HPN May 1, 14:35 UTCMay 1, 16:45 UTC2h 10m
2026-05-01 EJA343 SLK → HPN May 1, 11:35 UTCMay 1, 12:10 UTC35m
2026-05-01 EJA343 SLK → HPN May 1, 00:10 UTCMay 1, 03:00 UTC2h 50m
2026-04-30 EJA343 SLK → HPN Apr 30, 21:15 UTCApr 30, 22:10 UTC55m
2026-04-30 EJA343 SLK → HPN Apr 30, 00:35 UTCApr 30, 19:15 UTC18h 40m
2026-04-29 EJA343 SLK → HPN Apr 29, 23:20 UTCApr 29, 23:50 UTC30m
2026-04-29 EJA343 SLK → HPN Apr 29, 21:20 UTCApr 29, 22:20 UTC1h 0m
2026-04-29 EJA343 SLK → HPN Apr 29, 20:00 UTCApr 29, 20:20 UTC20m
2026-04-29 EJA343 SLK → HPN Apr 29, 15:40 UTCApr 29, 16:25 UTC45m
2026-04-27 EJA343 SLK → HPN Apr 27, 16:15 UTCApr 27, 17:05 UTC50m
2026-04-27 EJA343 SLK → HPN Apr 27, 14:00 UTCApr 27, 14:35 UTC35m
2026-04-26 EJA343 SLK → HPN Apr 26, 22:40 UTCApr 26, 23:40 UTC1h 0m
2026-04-26 EJA343 SLK → HPN Apr 26, 20:25 UTCApr 26, 20:40 UTC15m
2026-04-26 EJA343 SLK → HPN Apr 26, 18:55 UTCApr 26, 19:40 UTC45m
2026-04-26 EJA343 SLK → HPN Apr 26, 16:55 UTCApr 26, 17:45 UTC50m
2026-04-25 EJA343 SLK → HPN Apr 25, 01:00 UTCApr 25, 02:50 UTC1h 50m
2026-04-24 EJA343 SLK → HPN Apr 24, 16:35 UTCApr 24, 17:25 UTC50m
2026-04-23 EJA343 SLK → HPN Apr 23, 23:10 UTCApr 24, 01:20 UTC2h 10m
2026-04-23 EJA343 SLK → HPN Apr 23, 20:00 UTCApr 23, 21:30 UTC1h 30m
2026-04-23 EJA343 SLK → HPN Apr 23, 18:20 UTCApr 23, 18:55 UTC35m
2026-04-23 EJA343 SLK → HPN Apr 23, 16:35 UTCApr 23, 16:55 UTC20m
2026-04-22 EJA343 SLK → HPN Apr 22, 23:45 UTCApr 23, 01:10 UTC1h 25m
2026-04-22 EJA343 SLK → HPN Apr 22, 00:35 UTCApr 22, 01:35 UTC1h 0m
2026-04-21 EJA343 SLK → HPN Apr 21, 22:35 UTCApr 22, 00:05 UTC1h 30m
2026-04-21 EJA343 SLK → HPN Apr 21, 19:35 UTCApr 21, 19:50 UTC15m
2026-04-21 EJA343 SLK → HPN Apr 21, 16:35 UTCApr 21, 17:45 UTC1h 10m

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 N343QS page for operator, model, and routing details .

Mode-S A3C9E2 frequently asked

What is Mode-S code A3C9E2?
A3C9E2 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N343QS.
Where is Mode-S A3C9E2 registered?
Mode-S code A3C9E2 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 A3C9E2 broadcasting right now?
No active broadcast right now. Last signal was 9h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A3C9E2, octal 50744742, decimal 10,734,050.
What flights does A3C9E2 operate?
Mode-S A3C9E2 has broadcast 1 distinct callsign, including EJA343.