Apparatus

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sensors Mode-S transponder

A4D946

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N411QS · EMBRAER EMB-505 Phenom 300 · operated by NETJETS SALES INC, ARBOR INVESTMENTS MANAGEMENT LLC, GLASS GLEN LLC, HOLT LOGISTICS CORP, MEISTER PAUL M, CAHALL PETER S

Hex
A4D946
Octal
51154506
Decimal
10,803,526
Country
US
Tail
N411QS
Type
E55P
No current signal · last broadcast Jul 20, 18:55 UTC
Flights observed
283
Distinct callsigns
2
Country
US
Last broadcast
Jul 20, 18:55 UTC

Last known position

Most recent position reported by Mode-S A4D946.

Country allocation

The ICAO 24-bit address A4D946 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
EJA411 NetJets 277 2026-07-20
N411QS - 6 2026-07-05

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-20 EJA411 LBF → APC Jul 20, 17:25 UTCJul 20, 18:55 UTC1h 30m
2026-07-20 EJA411 LBF → APC Jul 20, 15:25 UTCJul 20, 16:20 UTC55m
2026-07-20 EJA411 LBF → APC Jul 20, 13:05 UTCJul 20, 14:15 UTC1h 10m
2026-07-19 EJA411 LBF → APC Jul 19, 21:45 UTCJul 19, 23:30 UTC1h 45m
2026-07-19 EJA411 LBF → APC Jul 19, 18:35 UTCJul 19, 20:40 UTC2h 5m
2026-07-19 EJA411 LBF → APC Jul 19, 16:55 UTCJul 19, 17:45 UTC50m
2026-07-19 EJA411 LBF → APC Jul 19, 14:40 UTCJul 19, 15:45 UTC1h 5m
2026-07-19 EJA411 - Jul 19, 12:50 UTCJul 19, 13:40 UTC50m
2026-07-18 EJA411 - Jul 18, 22:50 UTCJul 18, 23:40 UTC50m
2026-07-18 EJA411 - Jul 18, 20:05 UTCJul 18, 20:50 UTC45m
2026-07-18 EJA411 - Jul 18, 18:05 UTCJul 18, 18:20 UTC15m
2026-07-18 EJA411 - Jul 18, 14:00 UTCJul 18, 17:10 UTC3h 10m
2026-07-17 EJA411 - Jul 17, 22:05 UTCJul 17, 23:10 UTC1h 5m
2026-07-17 EJA411 - Jul 17, 19:25 UTCJul 17, 20:29 UTC1h 5m
2026-07-17 EJA411 - Jul 17, 14:35 UTCJul 17, 16:10 UTC1h 35m
2026-07-17 EJA411 - Jul 17, 12:50 UTCJul 17, 13:29 UTC40m
2026-07-16 EJA411 ORD → SUS Jul 16, 23:35 UTCJul 17, 00:20 UTC45m
2026-07-16 EJA411 - Jul 16, 20:39 UTCJul 16, 22:15 UTC1h 35m
2026-07-16 EJA411 - Jul 16, 18:59 UTCJul 16, 19:30 UTC30m
2026-07-16 EJA411 - Jul 16, 14:25 UTCJul 16, 15:00 UTC35m
2026-07-16 EJA411 - Jul 16, 12:30 UTCJul 16, 13:10 UTC40m
2026-07-16 EJA411 - Jul 16, 03:45 UTCJul 16, 06:00 UTC2h 15m
2026-07-16 EJA411 - Jul 16, 00:40 UTCJul 16, 03:05 UTC2h 25m
2026-07-15 EJA411 VNY → SJC Jul 15, 23:10 UTCJul 16, 00:00 UTC50m
2026-07-15 EJA411 - Jul 15, 21:35 UTCJul 15, 21:55 UTC20m
2026-07-15 EJA411 - Jul 15, 20:00 UTCJul 15, 20:45 UTC45m
2026-07-15 EJA411 - Jul 15, 18:20 UTCJul 15, 18:50 UTC30m
2026-07-15 EJA411 VGT → VNY Jul 15, 17:05 UTCJul 15, 17:50 UTC45m
2026-07-15 EJA411 VNY → VGT Jul 15, 13:55 UTCJul 15, 14:50 UTC55m
2026-07-14 EJA411 SFO → VNY Jul 14, 23:25 UTCJul 15, 00:20 UTC55m
2026-07-14 EJA411 SBA → SFO Jul 14, 20:10 UTCJul 14, 20:55 UTC45m
2026-07-14 EJA411 - Jul 14, 18:45 UTCJul 14, 19:20 UTC35m
2026-07-14 EJA411 - Jul 14, 16:45 UTCJul 14, 17:00 UTC15m
2026-07-14 EJA411 - Jul 14, 15:05 UTCJul 14, 16:15 UTC1h 10m
2026-07-13 EJA411 - Jul 13, 21:20 UTCJul 13, 22:55 UTC1h 35m
2026-07-13 EJA411 - Jul 13, 18:45 UTCJul 13, 18:55 UTC10m
2026-07-13 EJA411 - Jul 13, 16:10 UTCJul 13, 17:25 UTC1h 15m
2026-07-13 EJA411 - Jul 13, 13:20 UTCJul 13, 14:35 UTC1h 15m
2026-07-12 EJA411 - Jul 12, 21:55 UTCJul 13, 01:05 UTC3h 10m
2026-07-12 EJA411 - Jul 12, 04:40 UTCJul 12, 20:45 UTC16h 5m
2026-07-12 EJA411 - Jul 12, 01:20 UTCJul 12, 03:05 UTC1h 45m
2026-07-11 EJA411 - Jul 11, 19:55 UTCJul 11, 21:10 UTC1h 15m
2026-07-11 EJA411 - Jul 11, 17:55 UTCJul 11, 18:55 UTC1h 0m
2026-07-11 EJA411 - Jul 11, 14:25 UTCJul 11, 16:40 UTC2h 15m
2026-07-10 EJA411 LUK → HVN Jul 10, 22:30 UTCJul 11, 00:10 UTC1h 40m
2026-07-10 EJA411 LOU → LUK Jul 10, 19:50 UTCJul 10, 20:25 UTC35m
2026-07-10 EJA411 - Jul 10, 16:10 UTCJul 10, 18:00 UTC1h 50m
2026-07-10 EJA411 - Jul 10, 14:20 UTCJul 10, 14:50 UTC30m
2026-07-09 EJA411 - Jul 9, 23:00 UTCJul 9, 23:10 UTC10m
2026-07-09 EJA411 GRR → ASH Jul 9, 20:45 UTCJul 9, 22:20 UTC1h 35m

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 N411QS page for operator, model, and routing details .

Mode-S A4D946 frequently asked

What is Mode-S code A4D946?
A4D946 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N411QS.
Where is Mode-S A4D946 registered?
Mode-S code A4D946 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 A4D946 broadcasting right now?
No active broadcast right now. Last signal was Jul 20, 18:55 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A4D946, octal 51154506, decimal 10,803,526.
What flights does A4D946 operate?
Mode-S A4D946 has broadcast 2 distinct callsigns, including EJA411, N411QS.