Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

AD4250

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N9531J · PIPER PA-28-140/150/160/180 · operated by GRAYHAWK FLIGHT TRAINING LLC

Hex
AD4250
Octal
53241120
Decimal
11,354,704
Country
US
Tail
N9531J
Type
P28A
Broadcasting now · callsign N9531J · 1,200 ft
Flights observed
154
Distinct callsigns
1
Country
US
Last broadcast
1d ago

Current position

AD4250 is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address AD4250 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
N9531J - 154 2026-07-26

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 N9531J - Jul 26, 12:05 UTCJul 26, 13:15 UTC1h 10m
2026-07-25 N9531J - Jul 25, 18:20 UTCJul 25, 19:45 UTC1h 25m
2026-07-25 N9531J - Jul 25, 16:20 UTCJul 25, 17:10 UTC50m
2026-07-25 N9531J - Jul 25, 14:05 UTCJul 25, 14:55 UTC50m
2026-07-24 N9531J - Jul 24, 20:50 UTCJul 24, 22:15 UTC1h 25m
2026-07-23 N9531J - Jul 23, 17:50 UTCJul 23, 18:50 UTC1h 0m
2026-07-23 N9531J - Jul 23, 12:40 UTCJul 23, 13:40 UTC1h 0m
2026-07-22 N9531J - Jul 22, 17:35 UTCJul 22, 20:30 UTC2h 55m
2026-07-22 N9531J - Jul 22, 14:45 UTCJul 22, 15:50 UTC1h 5m
2026-07-21 N9531J - Jul 21, 23:05 UTCJul 22, 00:25 UTC1h 20m
2026-07-21 N9531J - Jul 21, 21:00 UTCJul 21, 22:10 UTC1h 10m
2026-07-21 N9531J - Jul 21, 17:05 UTCJul 21, 19:45 UTC2h 40m
2026-07-21 N9531J - Jul 21, 14:55 UTCJul 21, 15:50 UTC55m
2026-07-20 N9531J - Jul 20, 20:25 UTCJul 20, 21:15 UTC50m
2026-07-20 N9531J - Jul 20, 16:50 UTCJul 20, 19:25 UTC2h 35m
2026-07-20 N9531J - Jul 20, 14:40 UTCJul 20, 15:30 UTC50m
2026-07-17 N9531J - Jul 17, 23:00 UTCJul 18, 00:50 UTC1h 50m
2026-07-15 N9531J - Jul 15, 14:00 UTCJul 15, 16:20 UTC2h 20m
2026-07-15 N9531J - Jul 15, 13:10 UTCJul 15, 13:30 UTC20m
2026-07-11 N9531J - Jul 11, 12:35 UTCJul 11, 14:30 UTC1h 55m
2026-07-10 N9531J - Jul 10, 20:40 UTCJul 10, 22:30 UTC1h 50m
2026-07-10 N9531J - Jul 10, 14:00 UTCJul 10, 15:10 UTC1h 10m
2026-07-09 N9531J - Jul 9, 21:45 UTCJul 10, 00:55 UTC3h 10m
2026-07-09 N9531J - Jul 9, 18:15 UTCJul 9, 19:05 UTC50m
2026-07-09 N9531J - Jul 9, 15:45 UTCJul 9, 16:55 UTC1h 10m
2026-07-09 N9531J - Jul 9, 13:30 UTCJul 9, 14:25 UTC55m
2026-07-08 N9531J - Jul 8, 16:25 UTCJul 8, 17:45 UTC1h 20m
2026-07-07 N9531J - Jul 7, 19:50 UTCJul 7, 20:30 UTC40m
2026-07-07 N9531J - Jul 7, 15:35 UTCJul 7, 16:25 UTC50m
2026-07-07 N9531J - Jul 7, 12:20 UTCJul 7, 14:05 UTC1h 45m
2026-07-06 N9531J - Jul 6, 20:55 UTCJul 6, 21:50 UTC55m
2026-07-06 N9531J - Jul 6, 18:40 UTCJul 6, 20:05 UTC1h 25m
2026-07-06 N9531J - Jul 6, 16:10 UTCJul 6, 17:45 UTC1h 35m
2026-07-06 N9531J - Jul 6, 14:10 UTCJul 6, 15:05 UTC55m
2026-07-05 N9531J - Jul 5, 23:25 UTCJul 6, 00:20 UTC55m
2026-07-05 N9531J - Jul 5, 20:40 UTCJul 5, 22:20 UTC1h 40m
2026-07-05 N9531J - Jul 5, 16:05 UTCJul 5, 17:35 UTC1h 30m
2026-07-03 N9531J - Jul 3, 18:40 UTCJul 3, 19:40 UTC1h 0m
2026-07-03 N9531J - Jul 3, 15:50 UTCJul 3, 17:05 UTC1h 15m
2026-07-03 N9531J - Jul 3, 12:10 UTCJul 3, 13:20 UTC1h 10m
2026-07-02 N9531J - Jul 2, 23:25 UTCJul 3, 01:00 UTC1h 35m
2026-07-02 N9531J - Jul 2, 20:35 UTCJul 2, 22:20 UTC1h 45m
2026-07-02 N9531J - Jul 2, 14:55 UTCJul 2, 16:40 UTC1h 45m
2026-07-01 N9531J - Jul 1, 18:45 UTCJul 1, 19:35 UTC50m
2026-07-01 N9531J - Jul 1, 16:55 UTCJul 1, 17:30 UTC35m
2026-07-01 N9531J - Jul 1, 15:45 UTCJul 1, 16:25 UTC40m
2026-07-01 N9531J - Jul 1, 13:00 UTCJul 1, 14:05 UTC1h 5m
2026-06-30 N9531J - Jun 30, 21:20 UTCJun 30, 22:40 UTC1h 20m
2026-06-30 N9531J - Jun 30, 19:05 UTCJun 30, 20:35 UTC1h 30m
2026-06-30 N9531J - Jun 30, 17:45 UTCJun 30, 18:25 UTC40m

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 N9531J page for operator, model, and routing details .

Mode-S AD4250 frequently asked

What is Mode-S code AD4250?
AD4250 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N9531J.
Where is Mode-S AD4250 registered?
Mode-S code AD4250 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 AD4250 broadcasting right now?
Yes. Mode-S AD4250 is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex AD4250, octal 53241120, decimal 11,354,704.
What flights does AD4250 operate?
Mode-S AD4250 has broadcast 1 distinct callsign, including N9531J.