Apparatus

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sensors Mode-S transponder

A3F253

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N3530J · CESSNA 172R Cutlass RG · operated by CHRISTIANSEN AVIATION LLC

Hex
A3F253
Octal
50771123
Decimal
10,744,403
Country
US
Tail
N3530J
Type
C72R
No current signal · last broadcast 29d ago
Flights observed
77
Distinct callsigns
1
Country
US
Last broadcast
29d ago

Last known position

Most recent position reported by Mode-S A3F253.

Country allocation

The ICAO 24-bit address A3F253 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
N3530J - 77 2026-07-24

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-24 N3530J - Jul 24, 17:10 UTCJul 24, 17:35 UTC25m
2026-07-22 N3530J - Jul 22, 21:35 UTCJul 22, 22:40 UTC1h 5m
2026-07-15 N3530J - Jul 15, 19:30 UTCJul 15, 20:10 UTC40m
2026-07-15 N3530J - Jul 15, 15:05 UTCJul 15, 15:45 UTC40m
2026-07-15 N3530J - Jul 15, 14:30 UTCJul 15, 15:00 UTC30m
2026-07-14 N3530J - Jul 14, 17:05 UTCJul 14, 17:50 UTC45m
2026-07-13 N3530J - Jul 13, 13:45 UTCJul 13, 14:45 UTC1h 0m
2026-07-10 N3530J - Jul 10, 19:55 UTCJul 10, 21:20 UTC1h 25m
2026-07-09 N3530J - Jul 9, 15:35 UTCJul 9, 16:00 UTC25m
2026-07-08 N3530J - Jul 8, 21:10 UTCJul 8, 21:30 UTC20m
2026-07-08 N3530J - Jul 8, 20:05 UTCJul 8, 20:30 UTC25m
2026-07-08 N3530J - Jul 8, 17:55 UTCJul 8, 18:50 UTC55m
2026-07-08 N3530J - Jul 8, 15:35 UTCJul 8, 15:55 UTC20m
2026-07-08 N3530J - Jul 8, 15:20 UTCJul 8, 15:30 UTC10m
2026-07-02 N3530J - Jul 2, 16:40 UTCJul 2, 17:20 UTC40m
2026-07-02 N3530J - Jul 2, 14:35 UTCJul 2, 15:10 UTC35m
2026-07-01 N3530J - Jul 1, 19:30 UTCJul 1, 20:15 UTC45m
2026-07-01 N3530J - Jul 1, 14:40 UTCJul 1, 15:15 UTC35m
2026-06-30 N3530J - Jun 30, 16:00 UTCJun 30, 17:05 UTC1h 5m
2026-06-30 N3530J - Jun 30, 13:00 UTCJun 30, 14:10 UTC1h 10m
2026-06-29 N3530J - Jun 29, 19:05 UTCJun 29, 19:39 UTC35m
2026-06-26 N3530J - Jun 26, 14:35 UTCJun 26, 15:39 UTC1h 5m
2026-06-25 N3530J - Jun 25, 19:20 UTCJun 25, 20:05 UTC45m
2026-06-22 N3530J - Jun 22, 16:40 UTCJun 22, 17:10 UTC30m
2026-06-22 N3530J - Jun 22, 16:20 UTCJun 22, 16:29 UTC10m
2026-06-22 N3530J - Jun 22, 13:39 UTCJun 22, 14:49 UTC1h 10m
2026-06-21 N3530J - Jun 21, 15:44 UTCJun 21, 16:59 UTC1h 15m
2026-06-21 N3530J - Jun 21, 13:00 UTCJun 21, 14:10 UTC1h 10m
2026-06-19 N3530J - Jun 19, 15:44 UTCJun 19, 16:44 UTC1h 0m
2026-06-17 N3530J - Jun 17, 14:45 UTCJun 17, 15:30 UTC45m
2026-06-16 N3530J - Jun 16, 16:55 UTCJun 16, 17:15 UTC20m
2026-06-16 N3530J - Jun 16, 16:15 UTCJun 16, 16:25 UTC10m
2026-06-11 N3530J - Jun 11, 13:40 UTCJun 11, 15:20 UTC1h 40m
2026-06-09 N3530J - Jun 9, 19:05 UTCJun 9, 20:05 UTC1h 0m
2026-06-09 N3530J - Jun 9, 16:55 UTCJun 9, 17:35 UTC40m
2026-06-09 N3530J - Jun 9, 13:55 UTCJun 9, 15:25 UTC1h 30m
2026-06-08 N3530J - Jun 8, 18:45 UTCJun 8, 19:40 UTC55m
2026-06-08 N3530J - Jun 8, 16:20 UTCJun 8, 16:30 UTC10m
2026-06-08 N3530J - Jun 8, 15:30 UTCJun 8, 15:40 UTC10m
2026-06-04 N3530J - Jun 4, 13:35 UTCJun 4, 15:45 UTC2h 10m
2026-06-02 N3530J - Jun 2, 14:35 UTCJun 2, 15:35 UTC1h 0m
2026-06-01 N3530J - Jun 1, 19:15 UTCJun 1, 20:20 UTC1h 5m
2026-06-01 N3530J - Jun 1, 13:55 UTCJun 1, 14:20 UTC25m
2026-06-01 N3530J - Jun 1, 13:05 UTCJun 1, 13:20 UTC15m
2026-05-29 N3530J - May 29, 15:15 UTCMay 29, 15:45 UTC30m
2026-05-26 N3530J - May 26, 14:30 UTCMay 26, 14:40 UTC10m
2026-05-21 N3530J - May 21, 13:55 UTCMay 21, 15:30 UTC1h 35m
2026-05-20 N3530J - May 20, 19:15 UTCMay 20, 19:30 UTC15m
2026-05-20 N3530J - May 20, 17:40 UTCMay 20, 17:55 UTC15m
2026-05-20 N3530J - May 20, 13:40 UTCMay 20, 14:10 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 N3530J page for operator, model, and routing details .

Mode-S A3F253 frequently asked

What is Mode-S code A3F253?
A3F253 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N3530J.
Where is Mode-S A3F253 registered?
Mode-S code A3F253 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 A3F253 broadcasting right now?
No active broadcast right now. Last signal was 29d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A3F253, octal 50771123, decimal 10,744,403.
What flights does A3F253 operate?
Mode-S A3F253 has broadcast 1 distinct callsign, including N3530J.