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sensors Mode-S transponder

AD512B

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N9571H · CESSNA 172 Skyhawk · operated by WINGS OVER TEXAS HOLDINGS LLC

Hex
AD512B
Octal
53250453
Decimal
11,358,507
Country
US
Tail
N9571H
Type
C172
No current signal · last broadcast Jul 23, 13:30 UTC
Flights observed
99
Distinct callsigns
1
Country
US
Last broadcast
Jul 23, 13:30 UTC

Last known position

Most recent position reported by Mode-S AD512B.

Country allocation

The ICAO 24-bit address AD512B 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
N9571H - 99 2026-07-23

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-23 N9571H - Jul 23, 12:25 UTCJul 23, 13:30 UTC1h 5m
2026-07-22 N9571H - Jul 22, 19:45 UTCJul 22, 21:05 UTC1h 20m
2026-07-22 N9571H - Jul 22, 17:25 UTCJul 22, 18:25 UTC1h 0m
2026-07-22 N9571H - Jul 22, 14:50 UTCJul 22, 16:25 UTC1h 35m
2026-07-22 N9571H - Jul 22, 12:30 UTCJul 22, 13:20 UTC50m
2026-07-22 N9571H - Jul 22, 02:20 UTCJul 22, 03:35 UTC1h 15m
2026-07-21 N9571H - Jul 21, 20:40 UTCJul 21, 21:25 UTC45m
2026-07-21 N9571H - Jul 21, 17:25 UTCJul 21, 18:50 UTC1h 25m
2026-07-21 N9571H - Jul 21, 15:00 UTCJul 21, 16:20 UTC1h 20m
2026-07-20 N9571H - Jul 20, 22:55 UTCJul 20, 23:55 UTC59m
2026-07-20 N9571H - Jul 20, 19:45 UTCJul 20, 21:20 UTC1h 35m
2026-07-20 N9571H AFW → AFW Jul 20, 15:20 UTCJul 20, 16:55 UTC1h 35m
2026-07-20 N9571H - Jul 20, 12:20 UTCJul 20, 13:45 UTC1h 25m
2026-07-17 N9571H - Jul 17, 20:04 UTCJul 17, 21:15 UTC1h 10m
2026-07-17 N9571H - Jul 17, 17:35 UTCJul 17, 18:25 UTC50m
2026-07-17 N9571H - Jul 17, 14:55 UTCJul 17, 16:15 UTC1h 20m
2026-07-15 N9571H - Jul 15, 17:40 UTCJul 15, 18:35 UTC55m
2026-07-15 N9571H - Jul 15, 15:35 UTCJul 15, 16:10 UTC35m
2026-07-15 N9571H AFW → AFW Jul 15, 12:50 UTCJul 15, 13:05 UTC15m
2026-07-15 N9571H - Jul 15, 04:30 UTCJul 15, 04:40 UTC10m
2026-07-15 N9571H - Jul 15, 03:05 UTCJul 15, 04:25 UTC1h 20m
2026-07-14 N9571H - Jul 14, 17:55 UTCJul 14, 19:20 UTC1h 25m
2026-07-14 N9571H - Jul 14, 12:30 UTCJul 14, 12:55 UTC25m
2026-07-10 N9571H - Jul 10, 19:55 UTCJul 10, 21:10 UTC1h 15m
2026-07-10 N9571H - Jul 10, 17:25 UTCJul 10, 19:05 UTC1h 40m
2026-07-10 N9571H AFW → AFW Jul 10, 14:45 UTCJul 10, 15:20 UTC35m
2026-07-10 N9571H - Jul 10, 12:20 UTCJul 10, 14:00 UTC1h 40m
2026-07-09 N9571H - Jul 9, 19:50 UTCJul 9, 21:00 UTC1h 10m
2026-07-09 N9571H - Jul 9, 17:45 UTCJul 9, 18:20 UTC35m
2026-07-09 N9571H - Jul 9, 14:45 UTCJul 9, 16:25 UTC1h 40m
2026-07-09 N9571H - Jul 9, 12:25 UTCJul 9, 13:40 UTC1h 15m
2026-07-08 N9571H - Jul 8, 22:25 UTCJul 9, 00:10 UTC1h 45m
2026-07-08 N9571H - Jul 8, 21:00 UTCJul 8, 21:20 UTC20m
2026-07-08 N9571H - Jul 8, 19:55 UTCJul 8, 20:25 UTC30m
2026-07-08 N9571H - Jul 8, 12:25 UTCJul 8, 14:10 UTC1h 45m
2026-07-07 N9571H AFW → AFW Jul 7, 20:15 UTCJul 7, 21:10 UTC55m
2026-07-07 N9571H - Jul 7, 17:30 UTCJul 7, 18:45 UTC1h 15m
2026-07-07 N9571H - Jul 7, 14:55 UTCJul 7, 16:20 UTC1h 25m
2026-07-07 N9571H - Jul 7, 13:00 UTCJul 7, 13:50 UTC50m
2026-07-06 N9571H - Jul 6, 17:20 UTCJul 6, 19:10 UTC1h 50m
2026-07-06 N9571H - Jul 6, 14:50 UTCJul 6, 16:15 UTC1h 25m
2026-07-03 N9571H AFW → AFW Jul 3, 17:25 UTCJul 3, 18:55 UTC1h 30m
2026-07-02 N9571H - Jul 2, 19:55 UTCJul 2, 21:05 UTC1h 10m
2026-07-02 N9571H - Jul 2, 17:30 UTCJul 2, 18:50 UTC1h 20m
2026-07-02 N9571H - Jul 2, 14:55 UTCJul 2, 16:20 UTC1h 25m
2026-07-01 N9571H AFW → AFW Jul 1, 20:00 UTCJul 1, 20:25 UTC25m
2026-07-01 N9571H - Jul 1, 18:35 UTCJul 1, 18:50 UTC15m
2026-07-01 N9571H - Jul 1, 17:35 UTCJul 1, 18:00 UTC25m
2026-07-01 N9571H AFW → AFW Jul 1, 12:30 UTCJul 1, 14:05 UTC1h 35m
2026-06-30 N9571H - Jun 30, 20:05 UTCJun 30, 21:05 UTC1h 0m

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 N9571H page for operator, model, and routing details .

Mode-S AD512B frequently asked

What is Mode-S code AD512B?
AD512B is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N9571H.
Where is Mode-S AD512B registered?
Mode-S code AD512B 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 AD512B broadcasting right now?
No active broadcast right now. Last signal was Jul 23, 13:30 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex AD512B, octal 53250453, decimal 11,358,507.
What flights does AD512B operate?
Mode-S AD512B has broadcast 1 distinct callsign, including N9571H.