Apparatus

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sensors Mode-S transponder

A3973E

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N330QS · EMBRAER EMB-505 Phenom 300 · operated by NETJETS SALES INC, COCOLEO ENTERPRISES LLC, HILL LYDA, KNISELY PATRICIA A, TECUMSEH CAPITAL INC

Hex
A3973E
Octal
50713476
Decimal
10,721,086
Country
US
Tail
N330QS
Type
E55P
No current signal · last broadcast Jul 26, 20:35 UTC
Flights observed
286
Distinct callsigns
2
Country
US
Last broadcast
Jul 26, 20:35 UTC

Last known position

Most recent position reported by Mode-S A3973E.

Country allocation

The ICAO 24-bit address A3973E 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
EJA330 NetJets 277 2026-07-26
N330QS - 9 2026-05-27

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 EJA330 SMO → APC Jul 26, 19:45 UTCJul 26, 20:35 UTC50m
2026-07-26 EJA330 SMO → APC Jul 26, 17:40 UTCJul 26, 18:50 UTC1h 10m
2026-07-26 EJA330 SMO → APC Jul 26, 15:35 UTCJul 26, 16:30 UTC55m
2026-07-26 EJA330 SMO → APC Jul 26, 14:35 UTCJul 26, 14:55 UTC20m
2026-07-26 EJA330 SMO → APC Jul 26, 13:25 UTCJul 26, 14:00 UTC35m
2026-07-25 EJA330 SMO → APC Jul 25, 17:50 UTCJul 25, 18:25 UTC35m
2026-07-25 EJA330 SMO → APC Jul 25, 14:45 UTCJul 25, 15:40 UTC55m
2026-07-25 EJA330 SMO → APC Jul 25, 13:15 UTCJul 25, 13:40 UTC25m
2026-07-24 EJA330 SMO → APC Jul 24, 21:15 UTCJul 24, 22:15 UTC1h 0m
2026-07-24 EJA330 SMO → APC Jul 24, 19:05 UTCJul 24, 19:45 UTC40m
2026-07-24 EJA330 SMO → APC Jul 24, 15:20 UTCJul 24, 17:55 UTC2h 35m
2026-07-24 EJA330 SMO → APC Jul 24, 12:55 UTCJul 24, 13:50 UTC55m
2026-07-23 EJA330 SMO → APC Jul 23, 19:05 UTCJul 23, 19:40 UTC35m
2026-07-23 EJA330 SMO → APC Jul 23, 17:20 UTCJul 23, 17:40 UTC20m
2026-07-23 EJA330 SMO → APC Jul 23, 14:50 UTCJul 23, 15:45 UTC55m
2026-07-23 EJA330 SMO → APC Jul 23, 12:05 UTCJul 23, 13:00 UTC55m
2026-07-22 EJA330 - Jul 22, 19:00 UTCJul 22, 19:30 UTC30m
2026-07-22 EJA330 YHU → HPN Jul 22, 17:20 UTCJul 22, 18:15 UTC55m
2026-07-22 EJA330 PVD → YHU Jul 22, 15:25 UTCJul 22, 16:15 UTC50m
2026-07-22 EJA330 - Jul 22, 13:15 UTCJul 22, 14:00 UTC45m
2026-07-22 EJA330 MVY → BLM Jul 22, 11:10 UTCJul 22, 11:55 UTC45m
2026-07-17 EJA330 - Jul 17, 16:04 UTCJul 17, 16:34 UTC30m
2026-07-17 EJA330 - Jul 17, 00:04 UTCJul 17, 01:00 UTC55m
2026-07-16 EJA330 - Jul 16, 21:25 UTCJul 16, 22:30 UTC1h 5m
2026-07-16 EJA330 - Jul 16, 20:00 UTCJul 16, 20:39 UTC40m
2026-07-16 EJA330 - Jul 16, 16:49 UTCJul 16, 18:50 UTC2h 0m
2026-07-16 EJA330 - Jul 16, 13:54 UTCJul 16, 15:35 UTC1h 40m
2026-07-16 EJA330 - Jul 16, 00:10 UTCJul 16, 01:35 UTC1h 25m
2026-07-15 EJA330 - Jul 15, 22:30 UTCJul 15, 22:45 UTC15m
2026-07-15 EJA330 - Jul 15, 13:50 UTCJul 15, 16:25 UTC2h 35m
2026-07-15 EJA330 - Jul 15, 11:10 UTCJul 15, 12:00 UTC50m
2026-07-13 EJA330 YIP → MDW Jul 13, 18:15 UTCJul 13, 18:55 UTC40m
2026-07-13 EJA330 BED → YIP Jul 13, 15:50 UTCJul 13, 17:35 UTC1h 45m
2026-07-13 EJA330 - Jul 13, 13:00 UTCJul 13, 13:30 UTC30m
2026-07-12 EJA330 - Jul 12, 23:25 UTCJul 12, 23:55 UTC30m
2026-07-12 EJA330 - Jul 12, 20:15 UTCJul 12, 22:10 UTC1h 55m
2026-07-12 EJA330 - Jul 12, 17:30 UTCJul 12, 18:20 UTC50m
2026-07-12 EJA330 - Jul 12, 15:45 UTCJul 12, 16:35 UTC50m
2026-07-12 EJA330 - Jul 12, 13:15 UTCJul 12, 14:15 UTC1h 0m
2026-07-11 EJA330 - Jul 11, 16:15 UTCJul 11, 17:55 UTC1h 40m
2026-07-11 EJA330 - Jul 11, 14:45 UTCJul 11, 15:15 UTC30m
2026-07-10 EJA330 BED → MHT Jul 10, 15:40 UTCJul 10, 16:10 UTC30m
2026-07-10 EJA330 - Jul 10, 13:40 UTCJul 10, 14:45 UTC1h 5m
2026-07-10 EJA330 - Jul 10, 12:00 UTCJul 10, 12:20 UTC20m
2026-07-09 EJA330 - Jul 9, 22:00 UTCJul 10, 00:35 UTC2h 35m
2026-07-09 EJA330 - Jul 9, 20:35 UTCJul 9, 20:55 UTC20m
2026-07-09 EJA330 - Jul 9, 15:45 UTCJul 9, 16:20 UTC35m
2026-07-09 EJA330 - Jul 9, 12:55 UTCJul 9, 13:50 UTC55m
2026-07-09 EJA330 - Jul 9, 11:05 UTCJul 9, 11:45 UTC40m
2026-07-06 EJA330 SMO → APC Jul 6, 12:50 UTCJul 6, 13:40 UTC50m

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 N330QS page for operator, model, and routing details .

Mode-S A3973E frequently asked

What is Mode-S code A3973E?
A3973E is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N330QS.
Where is Mode-S A3973E registered?
Mode-S code A3973E 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 A3973E broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 20:35 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A3973E, octal 50713476, decimal 10,721,086.
What flights does A3973E operate?
Mode-S A3973E has broadcast 2 distinct callsigns, including EJA330, N330QS.