Apparatus

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sensors Mode-S transponder

A6985D

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N524FX · BOMBARDIER BD-100 Challenger 300 · operated by FLEXJET LLC

Hex
A6985D
Octal
51514135
Decimal
10,917,981
Country
US
Tail
N524FX
Type
CL30
No current signal · last broadcast 2d ago
Flights observed
118
Distinct callsigns
1
Country
US
Last broadcast
2d ago

Last known position

Most recent position reported by Mode-S A6985D.

Country allocation

The ICAO 24-bit address A6985D 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
LXJ524 - 118 2026-06-26

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-06-26 LXJ524 - Jun 26, 18:20 UTCJun 26, 19:09 UTC50m
2026-06-26 LXJ524 - Jun 26, 14:50 UTCJun 26, 17:25 UTC2h 35m
2026-06-25 LXJ524 - Jun 25, 17:09 UTCJun 25, 17:49 UTC40m
2026-06-25 LXJ524 - Jun 25, 14:59 UTCJun 25, 15:54 UTC55m
2026-06-25 LXJ524 - Jun 25, 12:40 UTCJun 25, 14:09 UTC1h 30m
2026-06-23 LXJ524 STP → IND Jun 23, 19:19 UTCJun 23, 20:29 UTC1h 10m
2026-06-23 LXJ524 - Jun 23, 14:59 UTCJun 23, 17:15 UTC2h 15m
2026-06-23 LXJ524 BED → HPN Jun 23, 13:59 UTCJun 23, 14:35 UTC35m
2026-06-23 LXJ524 TEB → BED Jun 23, 12:09 UTCJun 23, 12:55 UTC45m
2026-06-21 LXJ524 - Jun 21, 19:20 UTCJun 21, 20:54 UTC1h 35m
2026-06-21 LXJ524 - Jun 21, 15:59 UTCJun 21, 17:45 UTC1h 45m
2026-06-21 LXJ524 DAL → CLL Jun 21, 14:24 UTCJun 21, 14:59 UTC35m
2026-06-20 LXJ524 - Jun 20, 17:39 UTCJun 20, 18:19 UTC40m
2026-06-20 LXJ524 - Jun 20, 15:29 UTCJun 20, 16:29 UTC1h 0m
2026-06-19 LXJ524 - Jun 19, 16:09 UTCJun 19, 17:55 UTC1h 45m
2026-06-17 LXJ524 - Jun 17, 22:10 UTCJun 18, 00:15 UTC2h 5m
2026-06-17 LXJ524 - Jun 17, 19:50 UTCJun 17, 20:40 UTC50m
2026-06-17 LXJ524 - Jun 17, 17:15 UTCJun 17, 17:50 UTC35m
2026-06-17 LXJ524 - Jun 17, 14:30 UTCJun 17, 16:25 UTC1h 55m
2026-06-17 LXJ524 - Jun 17, 12:00 UTCJun 17, 12:50 UTC50m
2026-06-17 LXJ524 - Jun 17, 00:10 UTCJun 17, 01:00 UTC50m
2026-06-16 LXJ524 - Jun 16, 22:10 UTCJun 16, 22:55 UTC45m
2026-06-16 LXJ524 - Jun 16, 17:49 UTCJun 16, 20:10 UTC2h 21m
2026-06-16 LXJ524 - Jun 16, 16:05 UTCJun 16, 16:45 UTC40m
2026-06-16 LXJ524 - Jun 16, 02:09 UTCJun 16, 03:55 UTC1h 45m
2026-06-15 LXJ524 - Jun 15, 22:35 UTCJun 15, 23:54 UTC1h 20m
2026-06-15 LXJ524 - Jun 15, 19:30 UTCJun 15, 21:20 UTC1h 50m
2026-06-15 LXJ524 - Jun 15, 16:55 UTCJun 15, 17:50 UTC55m
2026-06-14 LXJ524 - Jun 14, 18:40 UTCJun 15, 00:29 UTC5h 49m
2026-06-14 LXJ524 - Jun 14, 17:10 UTCJun 14, 17:45 UTC35m
2026-06-13 LXJ524 - Jun 13, 18:05 UTCJun 13, 18:30 UTC25m
2026-06-12 LXJ524 - Jun 12, 20:05 UTCJun 12, 20:50 UTC45m
2026-06-12 LXJ524 - Jun 12, 17:45 UTCJun 12, 19:00 UTC1h 15m
2026-06-12 LXJ524 - Jun 12, 14:30 UTCJun 12, 15:15 UTC45m
2026-06-12 LXJ524 - Jun 12, 11:25 UTCJun 12, 12:35 UTC1h 10m
2026-06-11 LXJ524 - Jun 11, 15:55 UTCJun 11, 16:45 UTC50m
2026-06-10 LXJ524 - Jun 10, 19:25 UTCJun 10, 20:20 UTC55m
2026-06-08 LXJ524 - Jun 8, 20:15 UTCJun 8, 21:15 UTC1h 0m
2026-06-08 LXJ524 - Jun 8, 13:15 UTCJun 8, 14:05 UTC50m
2026-06-04 LXJ524 - Jun 4, 23:00 UTCJun 5, 00:05 UTC1h 5m
2026-06-04 LXJ524 - Jun 4, 15:20 UTCJun 4, 22:25 UTC7h 5m
2026-06-04 LXJ524 MSP → PWK Jun 4, 13:25 UTCJun 4, 14:20 UTC55m
2026-06-03 LXJ524 - Jun 3, 12:45 UTCJun 3, 15:00 UTC2h 15m
2026-06-01 LXJ524 - Jun 1, 14:35 UTCJun 1, 17:10 UTC2h 35m
2026-06-01 LXJ524 - Jun 1, 13:20 UTCJun 1, 13:30 UTC10m
2026-05-30 LXJ524 - May 30, 20:00 UTCMay 30, 20:15 UTC15m
2026-05-30 LXJ524 - May 30, 18:25 UTCMay 30, 19:00 UTC35m
2026-05-30 LXJ524 TEB → PIE May 30, 14:10 UTCMay 30, 16:35 UTC2h 25m
2026-05-29 LXJ524 - May 29, 12:40 UTCMay 29, 14:25 UTC1h 45m
2026-05-28 LXJ524 - May 28, 20:50 UTCMay 28, 22:10 UTC1h 20m

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 N524FX page for operator, model, and routing details .

Mode-S A6985D frequently asked

What is Mode-S code A6985D?
A6985D is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N524FX.
Where is Mode-S A6985D registered?
Mode-S code A6985D 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 A6985D broadcasting right now?
No active broadcast right now. Last signal was 2d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A6985D, octal 51514135, decimal 10,917,981.
What flights does A6985D operate?
Mode-S A6985D has broadcast 1 distinct callsign, including LXJ524.