Apparatus

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sensors Mode-S transponder

ACA369

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N913SJ · operated by BRAD SJOSTEDT

Hex
ACA369
Octal
53121551
Decimal
11,314,025
Country
US
Tail
N913SJ
No current signal · last broadcast 9h ago
Flights observed
38
Distinct callsigns
1
Country
US
Last broadcast
9h ago

Last known position

Most recent position reported by Mode-S ACA369.

Country allocation

The ICAO 24-bit address ACA369 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
N913SJ - 38 2026-05-30

Recent flights last 38

DateFlightRouteTakeoffLandingDuration
2026-05-30 N913SJ - May 30, 02:15 UTCMay 30, 02:25 UTC10m
2026-05-30 N913SJ - May 30, 00:25 UTCMay 30, 00:35 UTC10m
2026-05-26 N913SJ - May 26, 01:10 UTCMay 26, 02:29 UTC1h 20m
2026-05-25 N913SJ - May 25, 23:10 UTCMay 26, 00:04 UTC55m
2026-05-24 N913SJ - May 24, 20:00 UTCMay 24, 20:20 UTC20m
2026-05-24 N913SJ - May 24, 03:00 UTCMay 24, 03:10 UTC10m
2026-05-24 N913SJ - May 24, 01:15 UTCMay 24, 01:30 UTC15m
2026-05-22 N913SJ - May 22, 23:25 UTCMay 22, 23:40 UTC15m
2026-05-22 N913SJ - May 22, 22:30 UTCMay 22, 23:00 UTC30m
2026-05-22 N913SJ - May 22, 21:25 UTCMay 22, 22:00 UTC35m
2026-05-21 N913SJ - May 21, 05:20 UTCMay 21, 05:30 UTC10m
2026-05-21 N913SJ - May 21, 04:05 UTCMay 21, 05:10 UTC1h 5m
2026-05-17 N913SJ - May 17, 17:50 UTCMay 17, 19:10 UTC1h 20m
2026-05-17 N913SJ - May 17, 16:45 UTCMay 17, 17:20 UTC35m
2026-05-15 N913SJ - May 15, 23:45 UTCMay 16, 00:15 UTC30m
2026-05-15 N913SJ - May 15, 23:30 UTCMay 15, 23:40 UTC10m
2026-05-15 N913SJ - May 15, 22:35 UTCMay 15, 23:20 UTC45m
2026-05-14 N913SJ - May 14, 05:20 UTCMay 14, 05:40 UTC20m
2026-05-14 N913SJ - May 14, 05:05 UTCMay 14, 05:15 UTC10m
2026-05-14 N913SJ - May 14, 04:35 UTCMay 14, 05:00 UTC25m
2026-05-10 N913SJ - May 10, 23:55 UTCMay 11, 01:10 UTC1h 15m
2026-05-10 N913SJ - May 10, 17:30 UTCMay 10, 17:45 UTC15m
2026-05-10 N913SJ - May 10, 15:49 UTCMay 10, 17:05 UTC1h 15m
2026-05-10 N913SJ - May 10, 02:50 UTCMay 10, 04:15 UTC1h 25m
2026-05-04 N913SJ - May 4, 01:24 UTCMay 4, 01:35 UTC10m
2026-05-02 N913SJ - May 2, 15:20 UTCMay 2, 15:35 UTC15m
2026-05-02 N913SJ MRI → WWA May 2, 14:55 UTCMay 2, 15:15 UTC20m
2026-04-29 N913SJ - Apr 29, 20:15 UTCApr 29, 20:50 UTC35m
2026-04-27 N913SJ - Apr 27, 01:25 UTCApr 27, 02:10 UTC45m
2026-04-27 N913SJ - Apr 27, 00:35 UTCApr 27, 00:50 UTC15m
2026-04-26 N913SJ - Apr 26, 20:55 UTCApr 26, 21:25 UTC30m
2026-04-15 N913SJ - Apr 15, 05:00 UTCApr 15, 05:20 UTC20m
2026-04-15 N913SJ - Apr 15, 04:40 UTCApr 15, 04:50 UTC10m
2026-04-15 N913SJ - Apr 15, 02:05 UTCApr 15, 02:40 UTC35m
2026-04-15 N913SJ MRI → WWA Apr 15, 01:05 UTCApr 15, 01:30 UTC25m
2026-04-14 N913SJ - Apr 14, 21:05 UTCApr 14, 21:50 UTC45m
2026-04-13 N913SJ WWA → PAQ Apr 13, 23:30 UTCApr 13, 23:40 UTC10m
2026-04-13 N913SJ - Apr 13, 00:30 UTCApr 13, 00:45 UTC15m

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 N913SJ page for operator, model, and routing details .

Mode-S ACA369 frequently asked

What is Mode-S code ACA369?
ACA369 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N913SJ.
Where is Mode-S ACA369 registered?
Mode-S code ACA369 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 ACA369 broadcasting right now?
No active broadcast right now. Last signal was 9h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex ACA369, octal 53121551, decimal 11,314,025.
What flights does ACA369 operate?
Mode-S ACA369 has broadcast 1 distinct callsign, including N913SJ.