Apparatus

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sensors Mode-S transponder

A0723C

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N128JK · operated by CUB CRAFTERS INC

Hex
A0723C
Octal
50071074
Decimal
10,515,004
Country
US
Tail
N128JK
No current signal · last broadcast 1d ago
Flights observed
20
Distinct callsigns
1
Country
US
Last broadcast
1d ago

Last known position

Most recent position reported by Mode-S A0723C.

Country allocation

The ICAO 24-bit address A0723C 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
N128JK - 19 2026-06-26

Recent flights last 20

DateFlightRouteTakeoffLandingDuration
2026-06-26 N128JK - Jun 26, 20:10 UTCJun 26, 20:55 UTC45m
2026-06-26 N128JK - Jun 26, 19:04 UTCJun 26, 19:24 UTC20m
2026-06-26 N128JK - Jun 26, 17:54 UTCJun 26, 18:15 UTC20m
2026-06-25 N128JK - Jun 25, 20:39 UTCJun 25, 21:05 UTC25m
2026-06-24 N128JK - Jun 24, 16:29 UTCJun 24, 17:10 UTC40m
2026-06-23 N128JK - Jun 23, 21:34 UTCJun 23, 22:15 UTC40m
2026-06-21 N128JK - Jun 21, 16:25 UTCJun 21, 16:59 UTC35m
2026-06-21 N128JK - Jun 21, 13:34 UTCJun 21, 14:24 UTC50m
2026-06-20 N128JK - Jun 20, 17:44 UTCJun 20, 18:14 UTC30m
2026-06-20 N128JK - Jun 20, 13:34 UTCJun 20, 13:59 UTC25m
2026-06-17 N128JK - Jun 17, 18:10 UTCJun 17, 19:00 UTC50m
2026-06-14 N128JK - Jun 14, 16:10 UTCJun 14, 17:35 UTC1h 25m
2026-06-13 N128JK - Jun 13, 16:35 UTCJun 13, 16:55 UTC20m
2026-06-13 N128JK - Jun 13, 10:35 UTCJun 13, 16:00 UTC5h 25m
2026-06-08 N128JK - Jun 8, 16:35 UTCJun 8, 16:50 UTC15m
2026-05-14 N128JK - May 14, 13:40 UTCMay 14, 13:55 UTC15m
2026-04-28 N128JK - Apr 28, 19:40 UTCApr 28, 22:20 UTC2h 40m
2026-04-28 N128JK - Apr 28, 18:40 UTCApr 28, 18:50 UTC10m
2026-04-25 N128JK - Apr 25, 21:50 UTCApr 25, 22:05 UTC15m
2026-04-24 - - Apr 24, 13:30 UTCApr 24, 13:45 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 N128JK page for operator, model, and routing details .

Mode-S A0723C frequently asked

What is Mode-S code A0723C?
A0723C is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N128JK.
Where is Mode-S A0723C registered?
Mode-S code A0723C 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 A0723C broadcasting right now?
No active broadcast right now. Last signal was 1d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A0723C, octal 50071074, decimal 10,515,004.
What flights does A0723C operate?
Mode-S A0723C has broadcast 1 distinct callsign, including N128JK.