Apparatus

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sensors Mode-S transponder

A91739

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N685QS · CESSNA 560XL Citation XLS · operated by NETJETS SALES INC

Hex
A91739
Octal
52213471
Decimal
11,081,529
Country
US
Tail
N685QS
Type
C56X
No current signal · last broadcast 10h ago
Flights observed
105
Distinct callsigns
1
Country
US
Last broadcast
10h ago

Last known position

Most recent position reported by Mode-S A91739.

Country allocation

The ICAO 24-bit address A91739 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 1 distinct

Callsign Airline Flights Last seen
EJA685 NetJets 105 2026-05-29

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-05-29 EJA685 GEG → BFI May 29, 19:35 UTCMay 29, 20:40 UTC1h 5m
2026-05-29 EJA685 GEG → BFI May 29, 16:35 UTCMay 29, 17:20 UTC45m
2026-05-29 EJA685 GEG → BFI May 29, 14:40 UTCMay 29, 15:45 UTC1h 5m
2026-05-27 EJA685 GEG → BFI May 27, 19:25 UTCMay 27, 21:05 UTC1h 40m
2026-05-27 EJA685 GEG → BFI May 27, 15:50 UTCMay 27, 16:20 UTC30m
2026-05-27 EJA685 GEG → BFI May 27, 14:20 UTCMay 27, 15:10 UTC50m
2026-05-24 EJA685 GEG → BFI May 24, 16:10 UTCMay 24, 18:25 UTC2h 15m
2026-05-24 EJA685 GEG → BFI May 24, 14:00 UTCMay 24, 15:10 UTC1h 10m
2026-05-23 EJA685 GEG → BFI May 23, 16:50 UTCMay 23, 18:15 UTC1h 25m
2026-05-23 EJA685 GEG → BFI May 23, 15:15 UTCMay 23, 15:55 UTC40m
2026-05-23 EJA685 GEG → BFI May 23, 13:30 UTCMay 23, 14:25 UTC55m
2026-05-22 EJA685 GEG → BFI May 22, 21:40 UTCMay 22, 22:20 UTC40m
2026-05-22 EJA685 GEG → BFI May 22, 19:50 UTCMay 22, 20:45 UTC55m
2026-05-22 EJA685 GEG → BFI May 22, 17:35 UTCMay 22, 18:35 UTC1h 0m
2026-05-22 EJA685 GEG → BFI May 22, 14:20 UTCMay 22, 15:55 UTC1h 35m
2026-05-22 EJA685 GEG → BFI May 22, 00:30 UTCMay 22, 02:20 UTC1h 50m
2026-05-21 EJA685 GEG → BFI May 21, 19:10 UTCMay 21, 20:45 UTC1h 35m
2026-05-21 EJA685 GEG → BFI May 21, 17:25 UTCMay 21, 18:30 UTC1h 5m
2026-05-21 EJA685 GEG → BFI May 21, 14:20 UTCMay 21, 15:10 UTC50m
2026-05-20 EJA685 GEG → BFI May 20, 22:40 UTCMay 20, 23:20 UTC40m
2026-05-20 EJA685 GEG → BFI May 20, 21:00 UTCMay 20, 22:05 UTC1h 5m
2026-05-20 EJA685 GEG → BFI May 20, 18:50 UTCMay 20, 20:20 UTC1h 30m
2026-05-20 EJA685 GEG → BFI May 20, 17:45 UTCMay 20, 18:15 UTC30m
2026-05-20 EJA685 GEG → BFI May 20, 14:10 UTCMay 20, 15:15 UTC1h 5m
2026-05-19 EJA685 GEG → BFI May 19, 15:20 UTCMay 19, 17:30 UTC2h 10m
2026-05-18 EJA685 GEG → BFI May 18, 20:20 UTCMay 18, 21:10 UTC50m
2026-05-18 EJA685 GEG → BFI May 18, 15:20 UTCMay 18, 16:20 UTC1h 0m
2026-05-18 EJA685 GEG → BFI May 18, 12:45 UTCMay 18, 14:15 UTC1h 30m
2026-05-17 EJA685 GEG → BFI May 17, 21:55 UTCMay 17, 23:25 UTC1h 30m
2026-05-17 EJA685 GEG → BFI May 17, 18:55 UTCMay 17, 20:25 UTC1h 30m
2026-05-17 EJA685 GEG → BFI May 17, 17:10 UTCMay 17, 17:40 UTC30m
2026-05-17 EJA685 GEG → BFI May 17, 14:10 UTCMay 17, 15:45 UTC1h 35m
2026-05-17 EJA685 GEG → BFI May 17, 12:25 UTCMay 17, 13:10 UTC45m
2026-05-16 EJA685 GEG → BFI May 16, 17:15 UTCMay 16, 20:15 UTC3h 0m
2026-05-16 EJA685 GEG → BFI May 16, 15:16 UTCMay 16, 16:05 UTC50m
2026-05-13 EJA685 GEG → BFI May 13, 15:10 UTCMay 13, 16:20 UTC1h 10m
2026-05-12 EJA685 GEG → BFI May 12, 18:25 UTCMay 12, 18:55 UTC30m
2026-05-12 EJA685 GEG → BFI May 12, 14:45 UTCMay 12, 15:50 UTC1h 5m
2026-05-11 EJA685 GEG → BFI May 11, 16:45 UTCMay 11, 17:45 UTC1h 0m
2026-05-10 EJA685 GEG → BFI May 10, 22:45 UTCMay 11, 01:34 UTC2h 50m
2026-05-10 EJA685 GEG → BFI May 10, 21:10 UTCMay 10, 21:54 UTC45m
2026-05-10 EJA685 GEG → BFI May 10, 19:05 UTCMay 10, 19:15 UTC10m
2026-05-10 EJA685 GEG → BFI May 10, 17:30 UTCMay 10, 18:15 UTC45m
2026-05-10 EJA685 GEG → BFI May 10, 14:25 UTCMay 10, 16:00 UTC1h 35m
2026-05-09 EJA685 GEG → BFI May 9, 20:30 UTCMay 9, 22:10 UTC1h 40m
2026-05-09 EJA685 GEG → BFI May 9, 16:40 UTCMay 9, 19:35 UTC2h 55m
2026-05-09 EJA685 GEG → BFI May 9, 01:10 UTCMay 9, 02:35 UTC1h 25m
2026-05-08 EJA685 GEG → BFI May 8, 22:25 UTCMay 8, 23:45 UTC1h 20m
2026-05-08 EJA685 GEG → BFI May 8, 18:30 UTCMay 8, 20:45 UTC2h 15m
2026-05-08 EJA685 GEG → BFI May 8, 14:40 UTCMay 8, 17:40 UTC3h 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 N685QS page for operator, model, and routing details .

Mode-S A91739 frequently asked

What is Mode-S code A91739?
A91739 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N685QS.
Where is Mode-S A91739 registered?
Mode-S code A91739 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 A91739 broadcasting right now?
No active broadcast right now. Last signal was 10h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A91739, octal 52213471, decimal 11,081,529.
What flights does A91739 operate?
Mode-S A91739 has broadcast 1 distinct callsign, including EJA685.