Apparatus

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sensors Mode-S transponder

A9F3F9

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N740QS · BOMBARDIER BD-100 Challenger 350 · operated by NETJETS SALES INC, ABBYAIR LLC, BANK OF UTAH TRUSTEE, SHERMAN BETSY R, BICE LLC, IVASCYN DANIEL

Hex
A9F3F9
Octal
52371771
Decimal
11,138,041
Country
US
Tail
N740QS
Type
CL35
No current signal · last broadcast 14h ago
Flights observed
98
Distinct callsigns
2
Country
US
Last broadcast
14h ago

Last known position

Most recent position reported by Mode-S A9F3F9.

Country allocation

The ICAO 24-bit address A9F3F9 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
EJA740 NetJets 92 2026-05-29
N740QS - 6 2026-05-26

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-05-29 EJA740 TYS → PHL May 29, 19:50 UTCMay 29, 20:20 UTC30m
2026-05-29 EJA740 TYS → PHL May 29, 16:15 UTCMay 29, 18:05 UTC1h 50m
2026-05-29 EJA740 TYS → PHL May 29, 00:00 UTCMay 29, 01:45 UTC1h 45m
2026-05-28 EJA740 TYS → PHL May 28, 21:45 UTCMay 28, 23:30 UTC1h 45m
2026-05-28 EJA740 TYS → PHL May 28, 16:45 UTCMay 28, 17:35 UTC50m
2026-05-27 EJA740 TYS → PHL May 27, 20:25 UTCMay 28, 01:00 UTC4h 35m
2026-05-26 N740QS KOA → BFI May 26, 19:05 UTCMay 27, 00:55 UTC5h 50m
2026-05-24 N740QS - May 24, 17:15 UTCMay 24, 17:55 UTC40m
2026-05-22 EJA740 TYS → PHL May 22, 15:45 UTCMay 22, 18:00 UTC2h 15m
2026-05-22 EJA740 TYS → PHL May 22, 11:45 UTCMay 22, 14:05 UTC2h 20m
2026-05-20 EJA740 TYS → PHL May 20, 14:15 UTCMay 20, 16:40 UTC2h 25m
2026-05-20 EJA740 TYS → PHL May 20, 11:45 UTCMay 20, 13:30 UTC1h 45m
2026-05-20 EJA740 TYS → PHL May 20, 03:40 UTCMay 20, 06:15 UTC2h 36m
2026-05-20 EJA740 TYS → PHL May 20, 02:10 UTCMay 20, 03:00 UTC50m
2026-05-20 EJA740 TYS → PHL May 20, 00:05 UTCMay 20, 01:05 UTC1h 0m
2026-05-19 EJA740 TYS → PHL May 19, 21:55 UTCMay 19, 22:40 UTC45m
2026-05-19 EJA740 TYS → PHL May 19, 16:55 UTCMay 19, 17:20 UTC25m
2026-05-19 EJA740 TYS → PHL May 19, 11:40 UTCMay 19, 16:05 UTC4h 25m
2026-05-18 EJA740 TYS → PHL May 18, 22:35 UTCMay 18, 23:15 UTC40m
2026-05-18 EJA740 TYS → PHL May 18, 15:10 UTCMay 18, 17:50 UTC2h 40m
2026-05-18 EJA740 TYS → PHL May 18, 13:20 UTCMay 18, 13:35 UTC15m
2026-05-17 EJA740 TYS → PHL May 17, 23:35 UTCMay 18, 01:35 UTC2h 0m
2026-05-17 EJA740 TYS → PHL May 17, 15:31 UTCMay 17, 20:10 UTC4h 40m
2026-05-16 EJA740 TYS → PHL May 16, 17:40 UTCMay 16, 23:45 UTC6h 5m
2026-05-16 EJA740 TYS → PHL May 16, 15:40 UTCMay 16, 16:45 UTC1h 5m
2026-05-15 EJA740 TYS → PHL May 15, 20:10 UTCMay 15, 21:55 UTC1h 45m
2026-05-15 EJA740 TYS → PHL May 15, 16:40 UTCMay 15, 17:20 UTC40m
2026-05-15 EJA740 TYS → PHL May 15, 12:20 UTCMay 15, 15:25 UTC3h 4m
2026-05-14 EJA740 TYS → PHL May 14, 21:35 UTCMay 14, 22:25 UTC50m
2026-05-14 EJA740 TYS → PHL May 14, 17:25 UTCMay 14, 19:50 UTC2h 25m
2026-05-14 EJA740 TYS → PHL May 14, 15:25 UTCMay 14, 16:15 UTC50m
2026-05-13 EJA740 TYS → PHL May 13, 17:50 UTCMay 13, 19:45 UTC1h 55m
2026-05-13 EJA740 TYS → PHL May 13, 12:15 UTCMay 13, 15:00 UTC2h 45m
2026-05-12 EJA740 TYS → PHL May 12, 20:15 UTCMay 12, 21:25 UTC1h 10m
2026-05-12 EJA740 TYS → PHL May 12, 17:55 UTCMay 12, 18:40 UTC45m
2026-05-12 EJA740 TYS → PHL May 12, 15:55 UTCMay 12, 17:15 UTC1h 20m
2026-05-11 EJA740 TYS → PHL May 11, 21:50 UTCMay 11, 22:35 UTC44m
2026-05-11 EJA740 TYS → PHL May 11, 17:55 UTCMay 11, 20:25 UTC2h 30m
2026-05-11 EJA740 TYS → PHL May 11, 16:00 UTCMay 11, 16:25 UTC25m
2026-05-10 EJA740 TYS → PHL May 10, 23:50 UTCMay 11, 00:49 UTC1h 0m
2026-05-10 EJA740 TYS → PHL May 10, 20:09 UTCMay 10, 21:35 UTC1h 25m
2026-05-10 EJA740 TYS → PHL May 10, 03:20 UTCMay 10, 05:10 UTC1h 50m
2026-05-09 EJA740 TYS → PHL May 9, 22:30 UTCMay 9, 23:15 UTC45m
2026-05-08 EJA740 TYS → PHL May 8, 21:00 UTCMay 9, 00:25 UTC3h 25m
2026-05-08 EJA740 TYS → PHL May 8, 01:09 UTCMay 8, 02:04 UTC55m
2026-05-07 EJA740 TYS → PHL May 7, 21:15 UTCMay 8, 00:14 UTC3h 0m
2026-05-07 EJA740 TYS → PHL May 7, 18:00 UTCMay 7, 19:40 UTC1h 40m
2026-05-06 EJA740 TYS → PHL May 6, 20:00 UTCMay 6, 21:35 UTC1h 35m
2026-05-06 EJA740 TYS → PHL May 6, 17:45 UTCMay 6, 18:35 UTC50m
2026-05-06 EJA740 TYS → PHL May 6, 16:25 UTCMay 6, 16:55 UTC30m

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 N740QS page for operator, model, and routing details .

Mode-S A9F3F9 frequently asked

What is Mode-S code A9F3F9?
A9F3F9 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N740QS.
Where is Mode-S A9F3F9 registered?
Mode-S code A9F3F9 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 A9F3F9 broadcasting right now?
No active broadcast right now. Last signal was 14h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A9F3F9, octal 52371771, decimal 11,138,041.
What flights does A9F3F9 operate?
Mode-S A9F3F9 has broadcast 2 distinct callsigns, including EJA740, N740QS.