Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

A9FF1E

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N743QS · BOMBARDIER BD-100 Challenger 350 · operated by NETJETS SALES INC, ESTATE CAPITAL WORKS LLC, TVPX AIRCRAFT SOLUTIONS INC TRUSTEE, FREE AS A BIRD LTD LLC, PARENT COMPANY LLC, PH C350 LLC

Hex
A9FF1E
Octal
52377436
Decimal
11,140,894
Country
US
Tail
N743QS
Type
CL35
No current signal · last broadcast 10d ago
Flights observed
80
Distinct callsigns
2
Country
US
Last broadcast
10d ago

Last known position

Most recent position reported by Mode-S A9FF1E.

Country allocation

The ICAO 24-bit address A9FF1E 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
EJA743 NetJets 79 2026-06-12
N743QS - 1 2026-05-30

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-06-12 EJA743 SSI → MVY Jun 12, 00:30 UTCJun 12, 03:00 UTC2h 30m
2026-06-11 EJA743 SSI → MVY Jun 11, 20:40 UTCJun 11, 23:35 UTC2h 55m
2026-06-11 EJA743 SSI → MVY Jun 11, 16:10 UTCJun 11, 19:20 UTC3h 10m
2026-06-10 EJA743 SSI → MVY Jun 10, 22:10 UTCJun 10, 22:35 UTC25m
2026-06-10 EJA743 SSI → MVY Jun 10, 15:05 UTCJun 10, 20:50 UTC5h 45m
2026-06-10 EJA743 SSI → MVY Jun 10, 00:05 UTCJun 10, 00:50 UTC45m
2026-06-08 EJA743 SSI → MVY Jun 8, 22:20 UTCJun 8, 22:40 UTC20m
2026-06-08 EJA743 SSI → MVY Jun 8, 20:45 UTCJun 8, 21:35 UTC50m
2026-06-08 EJA743 SSI → MVY Jun 8, 15:10 UTCJun 8, 20:00 UTC4h 50m
2026-06-08 EJA743 SSI → MVY Jun 8, 00:00 UTCJun 8, 00:25 UTC25m
2026-06-07 EJA743 SSI → MVY Jun 7, 22:20 UTCJun 7, 22:45 UTC25m
2026-06-07 EJA743 SSI → MVY Jun 7, 16:15 UTCJun 7, 21:05 UTC4h 50m
2026-06-07 EJA743 SSI → MVY Jun 7, 14:50 UTCJun 7, 15:00 UTC10m
2026-06-07 EJA743 SSI → MVY Jun 7, 00:49 UTCJun 7, 02:19 UTC1h 30m
2026-06-06 EJA743 SSI → MVY Jun 6, 22:30 UTCJun 6, 23:35 UTC1h 5m
2026-06-06 EJA743 SSI → MVY Jun 6, 19:24 UTCJun 6, 19:44 UTC20m
2026-06-06 EJA743 SSI → MVY Jun 6, 16:45 UTCJun 6, 18:04 UTC1h 20m
2026-06-06 EJA743 SSI → MVY Jun 6, 14:04 UTCJun 6, 15:05 UTC1h 0m
2026-06-05 EJA743 SSI → MVY Jun 5, 23:45 UTCJun 6, 01:30 UTC1h 45m
2026-05-30 N743QS - May 30, 14:30 UTCMay 30, 23:30 UTC9h 0m
2026-05-29 EJA743 SSI → MVY May 29, 22:55 UTCMay 29, 23:30 UTC35m
2026-05-29 EJA743 SSI → MVY May 29, 21:45 UTCMay 29, 22:15 UTC30m
2026-05-29 EJA743 SSI → MVY May 29, 18:30 UTCMay 29, 19:05 UTC35m
2026-05-29 EJA743 SSI → MVY May 29, 17:00 UTCMay 29, 17:40 UTC40m
2026-05-29 EJA743 SSI → MVY May 29, 14:25 UTCMay 29, 15:35 UTC1h 10m
2026-05-29 EJA743 SSI → MVY May 29, 00:00 UTCMay 29, 01:30 UTC1h 30m
2026-05-28 EJA743 SSI → MVY May 28, 22:45 UTCMay 28, 23:15 UTC30m
2026-05-28 EJA743 SSI → MVY May 28, 19:55 UTCMay 28, 20:55 UTC1h 0m
2026-05-27 EJA743 SSI → MVY May 27, 21:05 UTCMay 27, 21:40 UTC35m
2026-05-27 EJA743 SSI → MVY May 27, 17:45 UTCMay 27, 20:05 UTC2h 20m
2026-05-27 EJA743 SSI → MVY May 27, 11:00 UTCMay 27, 16:25 UTC5h 25m
2026-05-25 EJA743 SSI → MVY May 25, 20:50 UTCMay 25, 22:40 UTC1h 50m
2026-05-25 EJA743 SSI → MVY May 25, 16:00 UTCMay 25, 17:15 UTC1h 15m
2026-05-25 EJA743 SSI → MVY May 25, 12:50 UTCMay 25, 14:30 UTC1h 40m
2026-05-22 EJA743 SSI → MVY May 22, 22:00 UTCMay 22, 23:20 UTC1h 20m
2026-05-22 EJA743 SSI → MVY May 22, 18:35 UTCMay 22, 19:40 UTC1h 5m
2026-05-22 EJA743 SSI → MVY May 22, 15:40 UTCMay 22, 17:00 UTC1h 20m
2026-05-22 EJA743 SSI → MVY May 22, 01:35 UTCMay 22, 02:40 UTC1h 5m
2026-05-21 EJA743 SSI → MVY May 21, 18:20 UTCMay 21, 20:15 UTC1h 55m
2026-05-21 EJA743 SSI → MVY May 21, 17:10 UTCMay 21, 17:25 UTC15m
2026-05-21 EJA743 SSI → MVY May 21, 14:20 UTCMay 21, 15:50 UTC1h 30m
2026-05-21 EJA743 SSI → MVY May 21, 00:15 UTCMay 21, 00:50 UTC35m
2026-05-20 EJA743 SSI → MVY May 20, 21:30 UTCMay 20, 23:15 UTC1h 45m
2026-05-20 EJA743 SSI → MVY May 20, 18:55 UTCMay 20, 19:10 UTC15m
2026-05-20 EJA743 SSI → MVY May 20, 15:30 UTCMay 20, 17:00 UTC1h 30m
2026-05-20 EJA743 SSI → MVY May 20, 00:25 UTCMay 20, 01:15 UTC50m
2026-05-19 EJA743 SSI → MVY May 19, 20:35 UTCMay 19, 23:35 UTC3h 0m
2026-05-19 EJA743 SSI → MVY May 19, 17:30 UTCMay 19, 18:00 UTC30m
2026-05-19 EJA743 SSI → MVY May 19, 02:55 UTCMay 19, 07:05 UTC4h 10m
2026-05-18 EJA743 SSI → MVY May 18, 23:30 UTCMay 19, 00:00 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 N743QS page for operator, model, and routing details .

Mode-S A9FF1E frequently asked

What is Mode-S code A9FF1E?
A9FF1E is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N743QS.
Where is Mode-S A9FF1E registered?
Mode-S code A9FF1E 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 A9FF1E broadcasting right now?
No active broadcast right now. Last signal was 10d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A9FF1E, octal 52377436, decimal 11,140,894.
What flights does A9FF1E operate?
Mode-S A9FF1E has broadcast 2 distinct callsigns, including EJA743, N743QS.