Apparatus

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sensors Mode-S transponder

A6A6A9

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N528AC · CESSNA 560XL Citation XLS · operated by TOWNLEY ENGINEERING AND MANUFACTURING CO INC

Hex
A6A6A9
Octal
51523251
Decimal
10,921,641
Country
US
Tail
N528AC
Type
C56X
No current signal · last broadcast Jun 30, 18:15 UTC
Flights observed
133
Distinct callsigns
1
Country
US
Last broadcast
Jun 30, 18:15 UTC

Last known position

Most recent position reported by Mode-S A6A6A9.

Country allocation

The ICAO 24-bit address A6A6A9 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
SCJ52 - 133 2026-06-30

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-06-30 SCJ52 - Jun 30, 17:40 UTCJun 30, 18:15 UTC35m
2026-06-30 SCJ52 - Jun 30, 15:10 UTCJun 30, 17:00 UTC1h 50m
2026-06-27 SCJ52 - Jun 27, 17:20 UTCJun 27, 17:59 UTC40m
2026-06-27 SCJ52 - Jun 27, 11:20 UTCJun 27, 12:19 UTC1h 0m
2026-06-26 SCJ52 - Jun 26, 17:50 UTCJun 26, 19:09 UTC1h 20m
2026-06-26 SCJ52 - Jun 26, 15:25 UTCJun 26, 17:09 UTC1h 45m
2026-06-26 SCJ52 - Jun 26, 13:49 UTCJun 26, 14:15 UTC25m
2026-06-25 SCJ52 - Jun 25, 19:54 UTCJun 25, 21:20 UTC1h 25m
2026-06-24 SCJ52 - Jun 24, 13:10 UTCJun 24, 13:40 UTC30m
2026-06-24 SCJ52 - Jun 24, 11:54 UTCJun 24, 12:09 UTC15m
2026-06-23 SCJ52 - Jun 23, 15:24 UTCJun 23, 19:00 UTC3h 35m
2026-06-22 SCJ52 - Jun 22, 16:05 UTCJun 22, 19:19 UTC3h 15m
2026-06-22 SCJ52 - Jun 22, 13:10 UTCJun 22, 13:54 UTC45m
2026-06-19 SCJ52 MSY → UES Jun 19, 16:04 UTCJun 19, 18:25 UTC2h 20m
2026-06-18 SCJ52 - Jun 18, 18:15 UTCJun 18, 19:50 UTC1h 35m
2026-06-18 SCJ52 - Jun 18, 14:35 UTCJun 18, 17:25 UTC2h 50m
2026-06-18 SCJ52 - Jun 18, 13:30 UTCJun 18, 13:45 UTC15m
2026-06-17 SCJ52 - Jun 17, 19:25 UTCJun 17, 20:20 UTC55m
2026-06-17 SCJ52 - Jun 17, 13:00 UTCJun 17, 13:55 UTC55m
2026-06-16 SCJ52 - Jun 16, 22:55 UTCJun 17, 02:55 UTC4h 0m
2026-06-16 SCJ52 MSY → LAS Jun 16, 18:20 UTCJun 16, 22:05 UTC3h 46m
2026-06-16 SCJ52 - Jun 16, 15:09 UTCJun 16, 17:30 UTC2h 20m
2026-06-15 SCJ52 - Jun 15, 18:35 UTCJun 15, 18:45 UTC10m
2026-06-15 SCJ52 - Jun 15, 17:04 UTCJun 15, 17:59 UTC55m
2026-06-15 SCJ52 - Jun 15, 15:19 UTCJun 15, 16:15 UTC55m
2026-06-14 SCJ52 - Jun 14, 23:39 UTCJun 15, 00:35 UTC55m
2026-06-14 SCJ52 - Jun 14, 22:00 UTCJun 14, 22:50 UTC50m
2026-06-14 SCJ52 - Jun 14, 18:55 UTCJun 14, 20:55 UTC2h 0m
2026-06-13 SCJ52 - Jun 13, 20:35 UTCJun 13, 21:15 UTC40m
2026-06-13 SCJ52 - Jun 13, 16:10 UTCJun 13, 19:55 UTC3h 45m
2026-06-13 SCJ52 - Jun 13, 15:05 UTCJun 13, 15:30 UTC25m
2026-06-13 SCJ52 - Jun 13, 00:55 UTCJun 13, 03:20 UTC2h 25m
2026-06-12 SCJ52 PDX → OGD Jun 12, 22:55 UTCJun 13, 00:20 UTC1h 25m
2026-06-12 SCJ52 VNY → PDX Jun 12, 19:05 UTCJun 12, 21:05 UTC2h 0m
2026-06-11 SCJ52 - Jun 11, 21:40 UTCJun 12, 02:10 UTC4h 31m
2026-06-11 SCJ52 - Jun 11, 17:30 UTCJun 11, 20:55 UTC3h 25m
2026-06-11 SCJ52 - Jun 11, 14:40 UTCJun 11, 16:50 UTC2h 10m
2026-06-11 SCJ52 - Jun 11, 06:25 UTCJun 11, 08:05 UTC1h 40m
2026-06-11 SCJ52 - Jun 11, 03:15 UTCJun 11, 05:30 UTC2h 15m
2026-06-11 SCJ52 - Jun 11, 01:35 UTCJun 11, 01:55 UTC20m
2026-06-10 SCJ52 GRB → UES Jun 10, 21:40 UTCJun 10, 22:05 UTC25m
2026-06-10 SCJ52 - Jun 10, 20:35 UTCJun 10, 21:35 UTC1h 0m
2026-06-10 SCJ52 - Jun 10, 11:00 UTCJun 10, 11:50 UTC50m
2026-06-10 SCJ52 - Jun 10, 10:15 UTCJun 10, 10:35 UTC20m
2026-06-10 SCJ52 - Jun 10, 00:35 UTCJun 10, 01:05 UTC30m
2026-06-09 SCJ52 - Jun 9, 12:20 UTCJun 9, 12:45 UTC25m
2026-06-08 SCJ52 - Jun 8, 16:30 UTCJun 8, 17:45 UTC1h 15m
2026-06-08 SCJ52 - Jun 8, 14:25 UTCJun 8, 15:40 UTC1h 15m
2026-06-08 SCJ52 - Jun 8, 11:50 UTCJun 8, 13:45 UTC1h 55m
2026-06-06 SCJ52 UES → UES Jun 6, 16:45 UTCJun 6, 18:29 UTC1h 45m

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 N528AC page for operator, model, and routing details .

Mode-S A6A6A9 frequently asked

What is Mode-S code A6A6A9?
A6A6A9 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N528AC.
Where is Mode-S A6A6A9 registered?
Mode-S code A6A6A9 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 A6A6A9 broadcasting right now?
No active broadcast right now. Last signal was Jun 30, 18:15 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A6A6A9, octal 51523251, decimal 10,921,641.
What flights does A6A6A9 operate?
Mode-S A6A6A9 has broadcast 1 distinct callsign, including SCJ52.