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 Jul 26, 18:45 UTC
Flights observed
279
Distinct callsigns
2
Country
US
Last broadcast
Jul 26, 18:45 UTC

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 2 distinct

Callsign Airline Flights Last seen
EJA343 NetJets 269 2026-07-26
N343QS - 10 2026-07-21

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 EJA343 SLK → HPN Jul 26, 17:55 UTCJul 26, 18:45 UTC50m
2026-07-26 EJA343 SLK → HPN Jul 26, 15:55 UTCJul 26, 17:05 UTC1h 10m
2026-07-26 EJA343 SLK → HPN Jul 26, 13:20 UTCJul 26, 14:45 UTC1h 25m
2026-07-25 EJA343 SLK → HPN Jul 25, 21:15 UTCJul 25, 23:10 UTC1h 55m
2026-07-25 EJA343 SLK → HPN Jul 25, 15:45 UTCJul 25, 17:50 UTC2h 5m
2026-07-25 EJA343 SLK → HPN Jul 25, 00:55 UTCJul 25, 01:20 UTC25m
2026-07-24 EJA343 SLK → HPN Jul 24, 23:40 UTCJul 25, 00:05 UTC25m
2026-07-24 EJA343 SLK → HPN Jul 24, 00:20 UTCJul 24, 00:45 UTC25m
2026-07-23 EJA343 SLK → HPN Jul 23, 23:25 UTCJul 23, 23:45 UTC20m
2026-07-23 EJA343 SLK → HPN Jul 23, 22:20 UTCJul 23, 22:45 UTC25m
2026-07-23 EJA343 SLK → HPN Jul 23, 20:40 UTCJul 23, 20:50 UTC10m
2026-07-23 EJA343 SLK → HPN Jul 23, 18:30 UTCJul 23, 20:10 UTC1h 40m
2026-07-23 EJA343 SLK → HPN Jul 23, 16:15 UTCJul 23, 17:05 UTC50m
2026-07-23 EJA343 SLK → HPN Jul 23, 14:30 UTCJul 23, 15:20 UTC50m
2026-07-23 EJA343 SLK → HPN Jul 23, 00:20 UTCJul 23, 01:10 UTC50m
2026-07-22 EJA343 SLK → HPN Jul 22, 22:00 UTCJul 22, 23:05 UTC1h 5m
2026-07-22 EJA343 SLK → HPN Jul 22, 18:50 UTCJul 22, 19:40 UTC50m
2026-07-21 N343QS VNY → LRD Jul 21, 22:40 UTCJul 22, 18:05 UTC19h 25m
2026-07-21 EJA343 LAS → VNY Jul 21, 20:45 UTCJul 21, 21:25 UTC40m
2026-07-21 EJA343 YYC → LAS Jul 21, 14:50 UTCJul 21, 17:25 UTC2h 35m
2026-07-20 EJA343 YWG → YYC Jul 20, 18:30 UTCJul 20, 22:05 UTC3h 35m
2026-07-20 EJA343 - Jul 20, 16:00 UTCJul 20, 17:35 UTC1h 35m
2026-07-20 EJA343 - Jul 20, 14:15 UTCJul 20, 14:45 UTC30m
2026-07-20 EJA343 - Jul 20, 12:00 UTCJul 20, 13:10 UTC1h 10m
2026-07-19 EJA343 ADS → FCM Jul 19, 20:15 UTCJul 19, 22:15 UTC2h 0m
2026-07-19 EJA343 - Jul 19, 17:35 UTCJul 19, 18:40 UTC1h 5m
2026-07-19 EJA343 - Jul 19, 15:35 UTCJul 19, 16:55 UTC1h 20m
2026-07-19 EJA343 - Jul 19, 13:05 UTCJul 19, 14:20 UTC1h 15m
2026-07-18 EJA343 - Jul 18, 20:25 UTCJul 18, 20:45 UTC20m
2026-07-18 EJA343 - Jul 18, 17:20 UTCJul 18, 19:45 UTC2h 25m
2026-07-18 EJA343 - Jul 18, 15:25 UTCJul 18, 15:40 UTC15m
2026-07-18 EJA343 - Jul 18, 12:45 UTCJul 18, 14:50 UTC2h 5m
2026-07-17 EJA343 - Jul 17, 19:55 UTCJul 17, 20:44 UTC50m
2026-07-17 EJA343 - Jul 17, 18:05 UTCJul 17, 19:00 UTC55m
2026-07-17 EJA343 MGW → IAD Jul 17, 15:20 UTCJul 17, 15:55 UTC35m
2026-07-15 EJA343 - Jul 15, 14:40 UTCJul 15, 16:05 UTC1h 25m
2026-07-15 EJA343 - Jul 15, 01:45 UTCJul 15, 03:20 UTC1h 35m
2026-07-14 EJA343 - Jul 14, 23:40 UTCJul 15, 00:25 UTC45m
2026-07-14 EJA343 - Jul 14, 21:45 UTCJul 14, 22:45 UTC59m
2026-07-14 EJA343 - Jul 14, 18:40 UTCJul 14, 21:05 UTC2h 25m
2026-07-14 EJA343 - Jul 14, 16:15 UTCJul 14, 16:30 UTC15m
2026-07-13 EJA343 LAX → MOD Jul 13, 23:55 UTCJul 14, 00:45 UTC50m
2026-07-13 EJA343 - Jul 13, 22:05 UTCJul 13, 23:00 UTC55m
2026-07-13 EJA343 SBA → SJC Jul 13, 19:05 UTCJul 13, 19:45 UTC40m
2026-07-13 EJA343 - Jul 13, 17:35 UTCJul 13, 17:55 UTC20m
2026-07-13 EJA343 BFI → SMO Jul 13, 14:20 UTCJul 13, 16:55 UTC2h 35m
2026-07-13 EJA343 - Jul 13, 00:01 UTCJul 13, 02:25 UTC2h 25m
2026-07-12 EJA343 SBA → SCF Jul 12, 21:35 UTCJul 12, 22:55 UTC1h 20m
2026-07-12 EJA343 - Jul 12, 18:55 UTCJul 12, 19:15 UTC20m
2026-07-12 EJA343 - Jul 12, 16:10 UTCJul 12, 18:05 UTC1h 55m

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 Jul 26, 18:45 UTC.
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 2 distinct callsigns, including EJA343, N343QS.