Apparatus

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sensors Mode-S transponder

A3EDD9

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N352SP · CESSNA 172 Skyhawk · operated by CHRISTIANSEN AVIATION LLC

Hex
A3EDD9
Octal
50766731
Decimal
10,743,257
Country
US
Tail
N352SP
Type
C172
No current signal · last broadcast Jul 24, 13:30 UTC
Flights observed
112
Distinct callsigns
1
Country
US
Last broadcast
Jul 24, 13:30 UTC

Last known position

Most recent position reported by Mode-S A3EDD9.

Country allocation

The ICAO 24-bit address A3EDD9 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
N352SP - 112 2026-07-24

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-24 N352SP AFW → AFW Jul 24, 12:40 UTCJul 24, 13:30 UTC50m
2026-07-24 N352SP - Jul 24, 02:10 UTCJul 24, 03:50 UTC1h 40m
2026-07-21 N352SP - Jul 21, 17:25 UTCJul 21, 18:25 UTC1h 0m
2026-07-21 N352SP - Jul 21, 01:40 UTCJul 21, 02:30 UTC50m
2026-07-20 N352SP - Jul 20, 19:50 UTCJul 20, 21:15 UTC1h 25m
2026-07-20 N352SP - Jul 20, 17:25 UTCJul 20, 18:40 UTC1h 15m
2026-07-20 N352SP - Jul 20, 14:40 UTCJul 20, 16:00 UTC1h 20m
2026-07-20 N352SP - Jul 20, 12:05 UTCJul 20, 13:45 UTC1h 40m
2026-07-17 N352SP - Jul 17, 20:15 UTCJul 17, 21:25 UTC1h 10m
2026-07-17 N352SP - Jul 17, 14:50 UTCJul 17, 18:40 UTC3h 50m
2026-07-15 N352SP - Jul 15, 18:40 UTCJul 15, 18:55 UTC15m
2026-07-15 N352SP - Jul 15, 17:25 UTCJul 15, 17:55 UTC30m
2026-07-15 N352SP AFW → AFW Jul 15, 14:50 UTCJul 15, 16:15 UTC1h 25m
2026-07-15 N352SP - Jul 15, 12:45 UTCJul 15, 13:40 UTC55m
2026-07-10 N352SP - Jul 10, 17:15 UTCJul 10, 18:50 UTC1h 35m
2026-07-10 N352SP - Jul 10, 14:45 UTCJul 10, 16:15 UTC1h 30m
2026-07-10 N352SP - Jul 10, 13:20 UTCJul 10, 13:45 UTC25m
2026-07-10 N352SP - Jul 10, 02:45 UTCJul 10, 04:15 UTC1h 30m
2026-07-09 N352SP - Jul 9, 21:55 UTCJul 9, 22:30 UTC35m
2026-07-09 N352SP - Jul 9, 20:20 UTCJul 9, 20:50 UTC30m
2026-07-09 N352SP - Jul 9, 17:30 UTCJul 9, 18:45 UTC1h 15m
2026-07-09 N352SP - Jul 9, 15:10 UTCJul 9, 16:35 UTC1h 25m
2026-07-09 N352SP - Jul 9, 03:45 UTCJul 9, 04:25 UTC40m
2026-07-09 N352SP - Jul 9, 02:40 UTCJul 9, 03:10 UTC30m
2026-07-08 N352SP - Jul 8, 22:15 UTCJul 8, 23:00 UTC45m
2026-07-08 N352SP - Jul 8, 20:15 UTCJul 8, 21:15 UTC1h 0m
2026-07-07 N352SP - Jul 7, 17:55 UTCJul 7, 18:25 UTC30m
2026-07-07 N352SP - Jul 7, 15:10 UTCJul 7, 15:40 UTC30m
2026-07-07 N352SP - Jul 7, 12:05 UTCJul 7, 13:30 UTC1h 25m
2026-07-06 N352SP - Jul 6, 20:15 UTCJul 6, 21:05 UTC50m
2026-07-06 N352SP - Jul 6, 17:25 UTCJul 6, 19:00 UTC1h 35m
2026-07-06 N352SP - Jul 6, 14:40 UTCJul 6, 15:55 UTC1h 15m
2026-07-06 N352SP - Jul 6, 12:35 UTCJul 6, 13:45 UTC1h 10m
2026-07-03 N352SP - Jul 3, 15:15 UTCJul 3, 16:40 UTC1h 25m
2026-07-02 N352SP - Jul 2, 20:35 UTCJul 2, 21:05 UTC30m
2026-07-02 N352SP - Jul 2, 17:25 UTCJul 2, 19:05 UTC1h 40m
2026-07-02 N352SP AFW → AFW Jul 2, 15:50 UTCJul 2, 16:20 UTC30m
2026-07-02 N352SP AFW → AFW Jul 2, 14:50 UTCJul 2, 15:20 UTC30m
2026-07-01 N352SP - Jul 1, 19:35 UTCJul 1, 20:55 UTC1h 20m
2026-07-01 N352SP - Jul 1, 14:55 UTCJul 1, 16:00 UTC1h 5m
2026-07-01 N352SP - Jul 1, 02:50 UTCJul 1, 03:55 UTC1h 5m
2026-07-01 N352SP - Jul 1, 00:05 UTCJul 1, 01:30 UTC1h 25m
2026-06-30 N352SP - Jun 30, 19:50 UTCJun 30, 20:55 UTC1h 5m
2026-06-30 N352SP AFW → AFW Jun 30, 14:50 UTCJun 30, 16:40 UTC1h 50m
2026-06-30 N352SP - Jun 30, 12:45 UTCJun 30, 13:30 UTC45m
2026-06-30 N352SP - Jun 30, 12:25 UTCJun 30, 12:40 UTC15m
2026-06-29 N352SP - Jun 29, 14:54 UTCJun 29, 16:00 UTC1h 5m
2026-06-26 N352SP - Jun 26, 19:50 UTCJun 26, 20:55 UTC1h 5m
2026-06-24 N352SP - Jun 24, 22:29 UTCJun 24, 23:45 UTC1h 15m
2026-06-24 N352SP - Jun 24, 20:24 UTCJun 24, 21:19 UTC55m

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 N352SP page for operator, model, and routing details .

Mode-S A3EDD9 frequently asked

What is Mode-S code A3EDD9?
A3EDD9 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N352SP.
Where is Mode-S A3EDD9 registered?
Mode-S code A3EDD9 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 A3EDD9 broadcasting right now?
No active broadcast right now. Last signal was Jul 24, 13:30 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A3EDD9, octal 50766731, decimal 10,743,257.
What flights does A3EDD9 operate?
Mode-S A3EDD9 has broadcast 1 distinct callsign, including N352SP.