Apparatus

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sensors Mode-S transponder

A594FA

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N459QS · EMBRAER EMB-505 Phenom 300 · operated by NETJETS SALES INC, BURKLAND FAMILY PARTNERS, HORGEN CHRIS, CLARK WILSON VENTURES LLC, DASPAR DAVID, SUTER DONALD

Hex
A594FA
Octal
51312372
Decimal
10,851,578
Country
US
Tail
N459QS
Type
E55P
No current signal · last broadcast Jul 26, 22:30 UTC
Flights observed
244
Distinct callsigns
2
Country
US
Last broadcast
Jul 26, 22:30 UTC

Last known position

Most recent position reported by Mode-S A594FA.

Country allocation

The ICAO 24-bit address A594FA 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
EJA459 NetJets 235 2026-07-26
N459QS - 9 2026-05-31

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 EJA459 BTV → BED Jul 26, 22:00 UTCJul 26, 22:30 UTC30m
2026-07-26 EJA459 BTV → BED Jul 26, 20:35 UTCJul 26, 21:05 UTC30m
2026-07-26 EJA459 BTV → BED Jul 26, 15:20 UTCJul 26, 17:50 UTC2h 30m
2026-07-25 EJA459 BTV → BED Jul 25, 23:50 UTCJul 26, 00:55 UTC1h 5m
2026-07-25 EJA459 BTV → BED Jul 25, 20:20 UTCJul 25, 22:35 UTC2h 15m
2026-07-25 EJA459 BTV → BED Jul 25, 17:00 UTCJul 25, 19:20 UTC2h 20m
2026-07-25 EJA459 BTV → BED Jul 25, 01:50 UTCJul 25, 02:15 UTC25m
2026-07-24 EJA459 BTV → BED Jul 24, 22:45 UTCJul 24, 23:25 UTC40m
2026-07-23 EJA459 BTV → BED Jul 23, 18:40 UTCJul 23, 19:00 UTC20m
2026-07-23 EJA459 BTV → BED Jul 23, 15:35 UTCJul 23, 18:05 UTC2h 30m
2026-07-23 EJA459 BTV → BED Jul 23, 13:30 UTCJul 23, 14:05 UTC35m
2026-07-22 EJA459 BTV → BED Jul 22, 21:30 UTCJul 22, 23:30 UTC2h 0m
2026-07-22 EJA459 BTV → BED Jul 22, 18:25 UTCJul 22, 20:25 UTC2h 0m
2026-07-22 EJA459 BTV → BED Jul 22, 16:30 UTCJul 22, 17:05 UTC35m
2026-07-22 EJA459 BTV → BED Jul 22, 13:00 UTCJul 22, 15:40 UTC2h 40m
2026-07-21 EJA459 BTV → BED Jul 21, 21:20 UTCJul 21, 21:45 UTC25m
2026-07-21 EJA459 BTV → BED Jul 21, 18:15 UTCJul 21, 20:05 UTC1h 50m
2026-07-21 EJA459 BTV → BED Jul 21, 14:45 UTCJul 21, 16:10 UTC1h 25m
2026-07-20 EJA459 BTV → BED Jul 20, 22:55 UTCJul 21, 00:00 UTC1h 4m
2026-07-20 EJA459 BTV → BED Jul 20, 20:45 UTCJul 20, 21:25 UTC40m
2026-07-20 EJA459 BTV → BED Jul 20, 18:25 UTCJul 20, 19:10 UTC45m
2026-07-20 EJA459 BTV → BED Jul 20, 15:20 UTCJul 20, 17:25 UTC2h 5m
2026-07-20 EJA459 BTV → BED Jul 20, 13:25 UTCJul 20, 14:00 UTC35m
2026-07-19 EJA459 BTV → BED Jul 19, 22:35 UTCJul 20, 00:40 UTC2h 5m
2026-07-19 EJA459 BTV → BED Jul 19, 20:30 UTCJul 19, 20:40 UTC10m
2026-07-19 EJA459 BTV → BED Jul 19, 16:55 UTCJul 19, 18:30 UTC1h 35m
2026-07-19 EJA459 BTV → BED Jul 19, 14:50 UTCJul 19, 16:15 UTC1h 25m
2026-07-07 EJA459 BTV → BED Jul 7, 21:00 UTCJul 7, 21:50 UTC50m
2026-07-07 EJA459 BTV → BED Jul 7, 19:30 UTCJul 7, 20:10 UTC40m
2026-07-07 EJA459 BTV → BED Jul 7, 14:30 UTCJul 7, 17:35 UTC3h 5m
2026-07-07 EJA459 BTV → BED Jul 7, 12:50 UTCJul 7, 13:10 UTC20m
2026-07-06 EJA459 BTV → BED Jul 6, 18:30 UTCJul 6, 19:10 UTC40m
2026-07-06 EJA459 BTV → BED Jul 6, 14:55 UTCJul 6, 16:20 UTC1h 25m
2026-07-06 EJA459 BTV → BED Jul 6, 11:00 UTCJul 6, 14:05 UTC3h 5m
2026-07-05 EJA459 BTV → BED Jul 5, 17:40 UTCJul 5, 18:40 UTC1h 0m
2026-06-28 EJA459 BTV → BED Jun 28, 21:55 UTCJun 28, 22:49 UTC55m
2026-06-28 EJA459 BTV → BED Jun 28, 20:09 UTCJun 28, 20:54 UTC45m
2026-06-28 EJA459 BTV → BED Jun 28, 17:10 UTCJun 28, 18:10 UTC1h 0m
2026-06-28 EJA459 BTV → BED Jun 28, 15:09 UTCJun 28, 16:00 UTC50m
2026-06-28 EJA459 BTV → BED Jun 28, 12:55 UTCJun 28, 13:55 UTC1h 0m
2026-06-27 EJA459 BTV → BED Jun 27, 02:20 UTCJun 27, 03:04 UTC45m
2026-06-26 EJA459 BTV → BED Jun 26, 23:55 UTCJun 27, 01:35 UTC1h 40m
2026-06-26 EJA459 BTV → BED Jun 26, 21:59 UTCJun 26, 22:55 UTC55m
2026-06-26 EJA459 BTV → BED Jun 26, 20:04 UTCJun 26, 21:10 UTC1h 5m
2026-06-26 EJA459 BTV → BED Jun 26, 18:15 UTCJun 26, 19:04 UTC50m
2026-06-26 EJA459 BTV → BED Jun 26, 15:45 UTCJun 26, 16:14 UTC30m
2026-06-26 EJA459 BTV → BED Jun 26, 00:39 UTCJun 26, 02:40 UTC2h 0m
2026-06-25 EJA459 BTV → BED Jun 25, 22:29 UTCJun 25, 23:14 UTC45m
2026-06-25 EJA459 BTV → BED Jun 25, 20:05 UTCJun 25, 21:50 UTC1h 45m
2026-06-25 EJA459 BTV → BED Jun 25, 17:05 UTCJun 25, 19:09 UTC2h 5m

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 N459QS page for operator, model, and routing details .

Mode-S A594FA frequently asked

What is Mode-S code A594FA?
A594FA is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N459QS.
Where is Mode-S A594FA registered?
Mode-S code A594FA 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 A594FA broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 22:30 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A594FA, octal 51312372, decimal 10,851,578.
What flights does A594FA operate?
Mode-S A594FA has broadcast 2 distinct callsigns, including EJA459, N459QS.