Apparatus

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sensors Mode-S transponder

A6B4B7

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N531FX · BOMBARDIER BD-100 Challenger 300 · operated by FLEXJET LLC

Hex
A6B4B7
Octal
51532267
Decimal
10,925,239
Country
US
Tail
N531FX
Type
CL30
No current signal · last broadcast 10d ago
Flights observed
179
Distinct callsigns
1
Country
US
Last broadcast
10d ago

Last known position

Most recent position reported by Mode-S A6B4B7.

Country allocation

The ICAO 24-bit address A6B4B7 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
LXJ531 - 179 2026-07-10

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-10 LXJ531 - Jul 10, 19:05 UTCJul 10, 20:45 UTC1h 40m
2026-07-10 LXJ531 - Jul 10, 13:35 UTCJul 10, 14:15 UTC40m
2026-07-09 LXJ531 - Jul 9, 21:05 UTCJul 9, 22:00 UTC55m
2026-07-09 LXJ531 - Jul 9, 18:40 UTCJul 9, 20:10 UTC1h 30m
2026-07-09 LXJ531 BLM → RKD Jul 9, 16:45 UTCJul 9, 17:55 UTC1h 10m
2026-07-09 LXJ531 - Jul 9, 13:45 UTCJul 9, 15:20 UTC1h 35m
2026-07-08 LXJ531 ORF → TYS Jul 8, 20:35 UTCJul 8, 21:40 UTC1h 5m
2026-07-07 LXJ531 - Jul 7, 10:55 UTCJul 7, 12:00 UTC1h 5m
2026-07-06 LXJ531 - Jul 6, 14:45 UTCJul 6, 16:20 UTC1h 35m
2026-07-05 LXJ531 LGA → PDK Jul 5, 17:40 UTCJul 5, 19:25 UTC1h 45m
2026-07-05 LXJ531 DTW → LGA Jul 5, 15:15 UTCJul 5, 16:35 UTC1h 20m
2026-07-03 LXJ531 - Jul 3, 04:50 UTCJul 3, 05:20 UTC30m
2026-07-03 LXJ531 - Jul 3, 00:55 UTCJul 3, 03:45 UTC2h 50m
2026-07-02 LXJ531 - Jul 2, 22:45 UTCJul 3, 00:00 UTC1h 15m
2026-07-02 LXJ531 - Jul 2, 21:00 UTCJul 2, 22:00 UTC1h 0m
2026-07-02 LXJ531 - Jul 2, 15:45 UTCJul 2, 20:00 UTC4h 15m
2026-07-02 LXJ531 - Jul 2, 13:10 UTCJul 2, 14:35 UTC1h 25m
2026-07-01 LXJ531 - Jul 1, 23:20 UTCJul 2, 01:00 UTC1h 40m
2026-07-01 LXJ531 - Jul 1, 19:05 UTCJul 1, 21:50 UTC2h 45m
2026-07-01 LXJ531 - Jul 1, 16:55 UTCJul 1, 17:35 UTC40m
2026-07-01 LXJ531 - Jul 1, 14:40 UTCJul 1, 15:45 UTC1h 5m
2026-06-30 LXJ531 - Jun 30, 21:00 UTCJun 30, 22:40 UTC1h 40m
2026-06-30 LXJ531 - Jun 30, 19:45 UTCJun 30, 20:30 UTC45m
2026-06-30 LXJ531 - Jun 30, 15:15 UTCJun 30, 16:15 UTC1h 0m
2026-06-30 LXJ531 MCO → PDK Jun 30, 12:55 UTCJun 30, 13:55 UTC1h 0m
2026-06-29 LXJ531 - Jun 29, 20:24 UTCJun 29, 23:49 UTC3h 25m
2026-06-29 LXJ531 - Jun 29, 16:59 UTCJun 29, 19:24 UTC2h 25m
2026-06-28 LXJ531 - Jun 28, 23:20 UTCJun 29, 01:50 UTC2h 30m
2026-06-28 LXJ531 SBD → APA Jun 28, 18:55 UTCJun 28, 20:29 UTC1h 35m
2026-06-28 LXJ531 - Jun 28, 15:14 UTCJun 28, 18:10 UTC2h 55m
2026-06-27 LXJ531 - Jun 27, 21:10 UTCJun 27, 21:59 UTC50m
2026-06-27 LXJ531 - Jun 27, 11:59 UTCJun 27, 19:15 UTC7h 15m
2026-06-26 LXJ531 - Jun 26, 20:55 UTCJun 26, 21:39 UTC45m
2026-06-26 LXJ531 - Jun 26, 19:09 UTCJun 26, 20:04 UTC55m
2026-06-26 LXJ531 - Jun 26, 16:09 UTCJun 26, 18:04 UTC1h 55m
2026-06-26 LXJ531 - Jun 26, 13:15 UTCJun 26, 14:29 UTC1h 15m
2026-06-26 LXJ531 - Jun 26, 10:39 UTCJun 26, 12:05 UTC1h 25m
2026-06-25 LXJ531 - Jun 25, 20:19 UTCJun 25, 22:20 UTC2h 0m
2026-06-25 LXJ531 - Jun 25, 15:59 UTCJun 25, 19:44 UTC3h 45m
2026-06-24 LXJ531 NUQ → SFO Jun 24, 21:44 UTCJun 24, 22:04 UTC20m
2026-06-24 LXJ531 - Jun 24, 15:59 UTCJun 24, 19:34 UTC3h 35m
2026-06-24 LXJ531 - Jun 24, 14:24 UTCJun 24, 14:50 UTC25m
2026-06-23 LXJ531 - Jun 23, 22:44 UTCJun 23, 23:10 UTC25m
2026-06-23 LXJ531 - Jun 23, 21:14 UTCJun 23, 22:10 UTC55m
2026-06-23 LXJ531 - Jun 23, 12:45 UTCJun 23, 13:24 UTC40m
2026-06-22 LXJ531 - Jun 22, 17:20 UTCJun 22, 20:34 UTC3h 15m
2026-06-22 LXJ531 - Jun 22, 15:50 UTCJun 22, 16:05 UTC15m
2026-06-21 LXJ531 - Jun 21, 20:59 UTCJun 22, 00:24 UTC3h 25m
2026-06-21 LXJ531 - Jun 21, 15:15 UTCJun 21, 16:34 UTC1h 20m
2026-06-20 LXJ531 - Jun 20, 15:09 UTCJun 20, 18:59 UTC3h 50m

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 N531FX page for operator, model, and routing details .

Mode-S A6B4B7 frequently asked

What is Mode-S code A6B4B7?
A6B4B7 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N531FX.
Where is Mode-S A6B4B7 registered?
Mode-S code A6B4B7 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 A6B4B7 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 A6B4B7, octal 51532267, decimal 10,925,239.
What flights does A6B4B7 operate?
Mode-S A6B4B7 has broadcast 1 distinct callsign, including LXJ531.