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 1d ago
Flights observed
158
Distinct callsigns
2
Country
US
Last broadcast
1d ago

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 156 2026-05-28
N411QS - 2 2026-05-21

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-05-28 EJA411 LBF → APC May 28, 19:20 UTCMay 28, 19:35 UTC15m
2026-05-28 EJA411 LBF → APC May 28, 15:55 UTCMay 28, 17:50 UTC1h 55m
2026-05-28 EJA411 LBF → APC May 28, 00:30 UTCMay 28, 01:20 UTC50m
2026-05-27 EJA411 LBF → APC May 27, 16:00 UTCMay 27, 16:50 UTC50m
2026-05-27 EJA411 LBF → APC May 27, 00:19 UTCMay 27, 01:09 UTC50m
2026-05-26 EJA411 LBF → APC May 26, 22:25 UTCMay 26, 23:39 UTC1h 15m
2026-05-26 EJA411 LBF → APC May 26, 20:09 UTCMay 26, 21:04 UTC55m
2026-05-26 EJA411 LBF → APC May 26, 17:55 UTCMay 26, 19:30 UTC1h 35m
2026-05-26 EJA411 LBF → APC May 26, 15:09 UTCMay 26, 17:15 UTC2h 5m
2026-05-25 EJA411 LBF → APC May 25, 21:04 UTCMay 26, 02:24 UTC5h 20m
2026-05-25 EJA411 LBF → APC May 25, 18:00 UTCMay 25, 20:09 UTC2h 10m
2026-05-25 EJA411 LBF → APC May 25, 15:00 UTCMay 25, 17:25 UTC2h 25m
2026-05-24 EJA411 LBF → APC May 24, 19:20 UTCMay 24, 19:50 UTC30m
2026-05-24 EJA411 LBF → APC May 24, 13:35 UTCMay 24, 14:40 UTC1h 5m
2026-05-23 EJA411 LBF → APC May 23, 18:50 UTCMay 23, 19:30 UTC40m
2026-05-23 EJA411 LBF → APC May 23, 14:50 UTCMay 23, 15:45 UTC55m
2026-05-22 EJA411 LBF → APC May 22, 23:30 UTCMay 23, 02:35 UTC3h 4m
2026-05-22 EJA411 LBF → APC May 22, 20:50 UTCMay 22, 21:40 UTC50m
2026-05-22 EJA411 LBF → APC May 22, 19:35 UTCMay 22, 20:10 UTC35m
2026-05-21 N411QS - May 21, 23:35 UTCMay 22, 17:40 UTC18h 5m
2026-05-21 N411QS - May 21, 23:05 UTCMay 22, 17:40 UTC18h 35m
2026-05-21 EJA411 LBF → APC May 21, 19:50 UTCMay 21, 20:35 UTC45m
2026-05-21 EJA411 LBF → APC May 21, 17:40 UTCMay 21, 18:45 UTC1h 5m
2026-05-21 EJA411 LBF → APC May 21, 13:55 UTCMay 21, 17:00 UTC3h 5m
2026-05-21 EJA411 LBF → APC May 21, 00:00 UTCMay 21, 02:00 UTC2h 0m
2026-05-20 EJA411 LBF → APC May 20, 22:10 UTCMay 20, 23:25 UTC1h 15m
2026-05-20 EJA411 LBF → APC May 20, 20:10 UTCMay 20, 20:30 UTC20m
2026-05-20 EJA411 LBF → APC May 20, 17:45 UTCMay 20, 18:20 UTC35m
2026-05-20 EJA411 LBF → APC May 20, 15:55 UTCMay 20, 17:00 UTC1h 5m
2026-05-20 EJA411 LBF → APC May 20, 12:05 UTCMay 20, 13:40 UTC1h 35m
2026-05-19 EJA411 LBF → APC May 19, 20:05 UTCMay 19, 20:50 UTC45m
2026-05-19 EJA411 LBF → APC May 19, 12:15 UTCMay 19, 17:15 UTC5h 0m
2026-05-18 EJA411 LBF → APC May 18, 19:55 UTCMay 18, 21:30 UTC1h 35m
2026-05-18 EJA411 LBF → APC May 18, 12:00 UTCMay 18, 14:45 UTC2h 45m
2026-05-17 EJA411 LBF → APC May 17, 20:20 UTCMay 17, 22:01 UTC1h 40m
2026-05-17 EJA411 LBF → APC May 17, 17:05 UTCMay 17, 18:01 UTC55m
2026-05-17 EJA411 LBF → APC May 17, 14:15 UTCMay 17, 14:50 UTC35m
2026-05-17 EJA411 LBF → APC May 17, 12:05 UTCMay 17, 12:55 UTC50m
2026-05-16 EJA411 LBF → APC May 16, 16:00 UTCMay 16, 18:05 UTC2h 5m
2026-05-16 EJA411 LBF → APC May 16, 13:51 UTCMay 16, 14:11 UTC20m
2026-05-15 EJA411 LBF → APC May 15, 19:20 UTCMay 15, 20:25 UTC1h 5m
2026-05-15 EJA411 LBF → APC May 15, 14:05 UTCMay 15, 14:35 UTC30m
2026-05-15 EJA411 LBF → APC May 15, 12:40 UTCMay 15, 13:10 UTC30m
2026-05-14 EJA411 LBF → APC May 14, 20:10 UTCMay 14, 21:00 UTC50m
2026-05-14 EJA411 LBF → APC May 14, 18:20 UTCMay 14, 19:00 UTC40m
2026-05-14 EJA411 LBF → APC May 14, 16:10 UTCMay 14, 17:15 UTC1h 5m
2026-05-14 EJA411 LBF → APC May 14, 13:40 UTCMay 14, 14:45 UTC1h 5m
2026-05-13 EJA411 LBF → APC May 13, 21:05 UTCMay 13, 21:55 UTC50m
2026-05-13 EJA411 LBF → APC May 13, 19:25 UTCMay 13, 19:45 UTC20m
2026-05-13 EJA411 LBF → APC May 13, 17:25 UTCMay 13, 18:25 UTC1h 0m

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 1d ago.
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.