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sensors Mode-S transponder

AD42DB

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N9535H · CESSNA 172 Skyhawk · operated by NORTHWEST WINGS LLC

Hex
AD42DB
Octal
53241333
Decimal
11,354,843
Country
US
Tail
N9535H
Type
C172
No current signal · last broadcast Jul 26, 22:45 UTC
Flights observed
242
Distinct callsigns
1
Country
US
Last broadcast
Jul 26, 22:45 UTC

Last known position

Most recent position reported by Mode-S AD42DB.

Country allocation

The ICAO 24-bit address AD42DB 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
N9535H - 242 2026-07-26

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 N9535H - Jul 26, 22:35 UTCJul 26, 22:45 UTC10m
2026-07-26 N9535H - Jul 26, 18:40 UTCJul 26, 21:20 UTC2h 40m
2026-07-26 N9535H - Jul 26, 15:55 UTCJul 26, 17:20 UTC1h 25m
2026-07-25 N9535H - Jul 25, 18:30 UTCJul 25, 19:50 UTC1h 20m
2026-07-25 N9535H - Jul 25, 15:50 UTCJul 25, 16:25 UTC35m
2026-07-25 N9535H - Jul 25, 04:35 UTCJul 25, 07:30 UTC2h 55m
2026-07-25 N9535H - Jul 25, 01:40 UTCJul 25, 02:55 UTC1h 15m
2026-07-25 N9535H - Jul 25, 00:35 UTCJul 25, 01:35 UTC1h 0m
2026-07-23 N9535H - Jul 23, 22:40 UTCJul 23, 23:50 UTC1h 10m
2026-07-23 N9535H - Jul 23, 18:20 UTCJul 23, 20:20 UTC2h 0m
2026-07-22 N9535H - Jul 22, 20:30 UTCJul 22, 21:00 UTC30m
2026-07-22 N9535H - Jul 22, 17:25 UTCJul 22, 17:50 UTC25m
2026-07-22 N9535H - Jul 22, 16:10 UTCJul 22, 16:55 UTC45m
2026-07-21 N9535H - Jul 21, 17:45 UTCJul 21, 18:50 UTC1h 5m
2026-07-20 N9535H - Jul 20, 21:05 UTCJul 20, 23:20 UTC2h 15m
2026-07-20 N9535H - Jul 20, 18:30 UTCJul 20, 20:10 UTC1h 40m
2026-07-20 N9535H - Jul 20, 15:45 UTCJul 20, 17:50 UTC2h 5m
2026-07-19 N9535H - Jul 19, 20:55 UTCJul 19, 21:55 UTC1h 0m
2026-07-19 N9535H - Jul 19, 19:35 UTCJul 19, 20:50 UTC1h 15m
2026-07-19 N9535H - Jul 19, 15:30 UTCJul 19, 18:30 UTC3h 0m
2026-07-18 N9535H - Jul 18, 22:40 UTCJul 19, 00:30 UTC1h 50m
2026-07-18 N9535H - Jul 18, 17:55 UTCJul 18, 19:20 UTC1h 25m
2026-07-18 N9535H - Jul 18, 15:20 UTCJul 18, 16:50 UTC1h 30m
2026-07-17 N9535H - Jul 17, 19:35 UTCJul 17, 20:55 UTC1h 20m
2026-07-17 N9535H - Jul 17, 17:44 UTCJul 17, 18:50 UTC1h 5m
2026-07-16 N9535H - Jul 16, 23:49 UTCJul 17, 01:00 UTC1h 10m
2026-07-16 N9535H - Jul 16, 19:25 UTCJul 16, 20:49 UTC1h 25m
2026-07-13 N9535H - Jul 13, 23:45 UTCJul 14, 02:00 UTC2h 15m
2026-07-13 N9535H - Jul 13, 15:55 UTCJul 13, 17:15 UTC1h 20m
2026-07-13 N9535H - Jul 13, 01:50 UTCJul 13, 02:15 UTC25m
2026-07-12 N9535H - Jul 12, 21:00 UTCJul 12, 21:30 UTC30m
2026-07-12 N9535H - Jul 12, 00:20 UTCJul 12, 01:30 UTC1h 10m
2026-07-11 N9535H - Jul 11, 18:45 UTCJul 11, 20:30 UTC1h 45m
2026-07-11 N9535H - Jul 11, 04:30 UTCJul 11, 05:05 UTC35m
2026-07-10 N9535H - Jul 10, 22:40 UTCJul 11, 00:50 UTC2h 10m
2026-07-10 N9535H - Jul 10, 20:05 UTCJul 10, 21:50 UTC1h 45m
2026-07-10 N9535H - Jul 10, 17:40 UTCJul 10, 18:40 UTC1h 0m
2026-07-10 N9535H - Jul 10, 00:15 UTCJul 10, 01:30 UTC1h 15m
2026-07-09 N9535H - Jul 9, 16:40 UTCJul 9, 17:50 UTC1h 10m
2026-07-08 N9535H - Jul 8, 21:55 UTCJul 9, 00:50 UTC2h 55m
2026-07-08 N9535H - Jul 8, 16:10 UTCJul 8, 18:00 UTC1h 50m
2026-07-07 N9535H - Jul 7, 21:50 UTCJul 7, 23:35 UTC1h 45m
2026-07-07 N9535H - Jul 7, 20:10 UTCJul 7, 20:55 UTC45m
2026-07-07 N9535H - Jul 7, 18:20 UTCJul 7, 19:30 UTC1h 10m
2026-07-06 N9535H - Jul 6, 23:00 UTCJul 6, 23:50 UTC50m
2026-07-06 N9535H - Jul 6, 18:30 UTCJul 6, 19:30 UTC1h 0m
2026-07-06 N9535H - Jul 6, 15:45 UTCJul 6, 17:35 UTC1h 50m
2026-07-06 N9535H - Jul 6, 01:35 UTCJul 6, 03:20 UTC1h 45m
2026-07-05 N9535H - Jul 5, 21:50 UTCJul 5, 23:35 UTC1h 45m
2026-07-05 N9535H - Jul 5, 18:25 UTCJul 5, 19:55 UTC1h 30m

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 N9535H page for operator, model, and routing details .

Mode-S AD42DB frequently asked

What is Mode-S code AD42DB?
AD42DB is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N9535H.
Where is Mode-S AD42DB registered?
Mode-S code AD42DB 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 AD42DB broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 22:45 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex AD42DB, octal 53241333, decimal 11,354,843.
What flights does AD42DB operate?
Mode-S AD42DB has broadcast 1 distinct callsign, including N9535H.