Apparatus

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sensors Mode-S transponder

A6C66C

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N53576 · CESSNA 172 Skyhawk · operated by VENBRO HOLDINGS LLC

Hex
A6C66C
Octal
51543154
Decimal
10,929,772
Country
US
Tail
N53576
Type
C172
No current signal · last broadcast 1h ago
Flights observed
112
Distinct callsigns
1
Country
US
Last broadcast
1h ago

Last known position

Most recent position reported by Mode-S A6C66C.

Country allocation

The ICAO 24-bit address A6C66C 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
N53576 - 112 2026-07-14

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 N53576 - Jul 14, 16:45 UTCJul 14, 17:00 UTC15m
2026-07-14 N53576 - Jul 14, 14:35 UTCJul 14, 15:50 UTC1h 15m
2026-07-13 N53576 - Jul 13, 19:20 UTCJul 13, 20:35 UTC1h 15m
2026-07-12 N53576 - Jul 12, 22:25 UTCJul 12, 23:15 UTC50m
2026-07-12 N53576 - Jul 12, 19:25 UTCJul 12, 20:35 UTC1h 10m
2026-07-12 N53576 - Jul 12, 14:45 UTCJul 12, 15:50 UTC1h 5m
2026-07-11 N53576 - Jul 11, 17:25 UTCJul 11, 18:30 UTC1h 5m
2026-07-11 N53576 - Jul 11, 14:40 UTCJul 11, 15:20 UTC40m
2026-07-09 N53576 - Jul 9, 15:40 UTCJul 9, 16:00 UTC20m
2026-07-09 N53576 - Jul 9, 14:40 UTCJul 9, 15:00 UTC20m
2026-07-08 N53576 - Jul 8, 21:55 UTCJul 8, 23:10 UTC1h 15m
2026-07-08 N53576 - Jul 8, 19:25 UTCJul 8, 20:35 UTC1h 10m
2026-07-08 N53576 - Jul 8, 17:20 UTCJul 8, 18:15 UTC55m
2026-07-08 N53576 - Jul 8, 15:10 UTCJul 8, 15:50 UTC40m
2026-07-01 N53576 CDW → CDW Jul 1, 19:20 UTCJul 1, 20:05 UTC45m
2026-07-01 N53576 - Jul 1, 15:50 UTCJul 1, 16:10 UTC20m
2026-07-01 N53576 - Jul 1, 14:35 UTCJul 1, 15:10 UTC35m
2026-06-30 N53576 CDW → CDW Jun 30, 16:30 UTCJun 30, 17:30 UTC1h 0m
2026-06-29 N53576 - Jun 29, 19:29 UTCJun 29, 20:35 UTC1h 5m
2026-06-29 N53576 CDW → CDW Jun 29, 17:30 UTCJun 29, 18:25 UTC55m
2026-06-25 N53576 - Jun 25, 19:24 UTCJun 25, 20:45 UTC1h 20m
2026-06-25 N53576 - Jun 25, 15:50 UTCJun 25, 16:45 UTC55m
2026-06-25 N53576 - Jun 25, 14:09 UTCJun 25, 14:50 UTC40m
2026-06-24 N53576 CDW → CDW Jun 24, 21:14 UTCJun 24, 21:54 UTC40m
2026-06-24 N53576 - Jun 24, 17:25 UTCJun 24, 18:55 UTC1h 30m
2026-06-24 N53576 CDW → CDW Jun 24, 15:49 UTCJun 24, 15:59 UTC10m
2026-06-24 N53576 - Jun 24, 14:04 UTCJun 24, 15:09 UTC1h 5m
2026-06-23 N53576 - Jun 23, 19:29 UTCJun 23, 20:44 UTC1h 15m
2026-06-20 N53576 - Jun 20, 14:24 UTCJun 20, 14:39 UTC15m
2026-06-20 N53576 - Jun 20, 13:24 UTCJun 20, 13:39 UTC15m
2026-06-20 N53576 - Jun 20, 11:59 UTCJun 20, 12:30 UTC30m
2026-06-19 N53576 CDW → CDW Jun 19, 18:14 UTCJun 19, 18:44 UTC30m
2026-06-19 N53576 - Jun 19, 14:19 UTCJun 19, 15:09 UTC50m
2026-06-16 N53576 - Jun 16, 21:20 UTCJun 16, 22:05 UTC45m
2026-06-13 N53576 - Jun 13, 16:40 UTCJun 13, 18:15 UTC1h 35m
2026-06-12 N53576 - Jun 12, 18:20 UTCJun 12, 19:40 UTC1h 20m
2026-06-11 N53576 - Jun 11, 19:05 UTCJun 11, 19:55 UTC50m
2026-06-11 N53576 CDW → CDW Jun 11, 14:10 UTCJun 11, 15:35 UTC1h 25m
2026-06-09 N53576 - Jun 9, 23:00 UTCJun 10, 00:10 UTC1h 10m
2026-06-09 N53576 - Jun 9, 20:25 UTCJun 9, 21:55 UTC1h 30m
2026-06-09 N53576 - Jun 9, 18:10 UTCJun 9, 18:25 UTC15m
2026-06-09 N53576 - Jun 9, 17:05 UTCJun 9, 17:35 UTC30m
2026-06-06 N53576 - Jun 6, 15:15 UTCJun 6, 15:54 UTC40m
2026-06-05 N53576 - Jun 5, 16:30 UTCJun 5, 17:15 UTC45m
2026-06-05 N53576 CDW → CDW Jun 5, 14:30 UTCJun 5, 15:40 UTC1h 10m
2026-06-04 N53576 - Jun 4, 17:10 UTCJun 4, 18:25 UTC1h 15m
2026-06-04 N53576 - Jun 4, 01:05 UTCJun 4, 02:25 UTC1h 20m
2026-06-03 N53576 - Jun 3, 22:05 UTCJun 3, 23:20 UTC1h 15m
2026-06-03 N53576 - Jun 3, 17:20 UTCJun 3, 18:10 UTC50m
2026-06-02 N53576 - Jun 2, 22:50 UTCJun 2, 23:00 UTC10m

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 N53576 page for operator, model, and routing details .

Mode-S A6C66C frequently asked

What is Mode-S code A6C66C?
A6C66C is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N53576.
Where is Mode-S A6C66C registered?
Mode-S code A6C66C 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 A6C66C broadcasting right now?
No active broadcast right now. Last signal was 1h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A6C66C, octal 51543154, decimal 10,929,772.
What flights does A6C66C operate?
Mode-S A6C66C has broadcast 1 distinct callsign, including N53576.