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sensors Mode-S transponder

AAD3A4

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N797SP · CESSNA 172 Skyhawk · operated by SUNDOWNERS INC

Hex
AAD3A4
Octal
52551644
Decimal
11,195,300
Country
US
Tail
N797SP
Type
C172
No current signal · last broadcast Jul 25, 17:25 UTC
Flights observed
150
Distinct callsigns
1
Country
US
Last broadcast
Jul 25, 17:25 UTC

Last known position

Most recent position reported by Mode-S AAD3A4.

Country allocation

The ICAO 24-bit address AAD3A4 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
N797SP - 150 2026-07-25

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-25 N797SP VNC → FMY Jul 25, 16:50 UTCJul 25, 17:25 UTC35m
2026-07-25 N797SP FMY → VNC Jul 25, 14:40 UTCJul 25, 15:05 UTC25m
2026-07-25 N797SP FMY → FMY Jul 25, 10:30 UTCJul 25, 11:40 UTC1h 10m
2026-07-23 N797SP - Jul 23, 14:45 UTCJul 23, 15:05 UTC20m
2026-07-23 N797SP - Jul 23, 12:35 UTCJul 23, 13:05 UTC30m
2026-07-22 N797SP - Jul 22, 13:05 UTCJul 22, 13:55 UTC50m
2026-07-22 N797SP - Jul 22, 11:25 UTCJul 22, 12:00 UTC35m
2026-07-20 N797SP FMY → FMY Jul 20, 22:25 UTCJul 20, 22:55 UTC30m
2026-07-20 N797SP - Jul 20, 13:55 UTCJul 20, 14:20 UTC25m
2026-07-20 N797SP - Jul 20, 11:50 UTCJul 20, 12:10 UTC20m
2026-07-19 N797SP - Jul 19, 01:30 UTCJul 19, 02:25 UTC55m
2026-07-18 N797SP - Jul 18, 23:15 UTCJul 19, 00:20 UTC1h 5m
2026-07-18 N797SP - Jul 18, 18:10 UTCJul 18, 18:25 UTC15m
2026-07-18 N797SP - Jul 18, 16:15 UTCJul 18, 16:30 UTC15m
2026-07-17 N797SP - Jul 17, 19:35 UTCJul 17, 20:40 UTC1h 5m
2026-07-17 N797SP FMY → MCO Jul 17, 12:15 UTCJul 17, 13:40 UTC1h 25m
2026-07-16 N797SP - Jul 16, 14:15 UTCJul 16, 14:50 UTC35m
2026-07-16 N797SP - Jul 16, 12:14 UTCJul 16, 12:44 UTC30m
2026-07-15 N797SP FMY → FMY Jul 15, 23:05 UTCJul 15, 23:50 UTC45m
2026-07-15 N797SP - Jul 15, 14:35 UTCJul 15, 15:10 UTC35m
2026-07-14 N797SP - Jul 14, 23:10 UTCJul 14, 23:30 UTC20m
2026-07-14 N797SP - Jul 14, 17:25 UTCJul 14, 17:50 UTC25m
2026-07-14 N797SP - Jul 14, 14:50 UTCJul 14, 15:20 UTC30m
2026-07-13 N797SP - Jul 13, 21:20 UTCJul 13, 22:25 UTC1h 5m
2026-07-11 N797SP - Jul 11, 14:45 UTCJul 11, 15:00 UTC15m
2026-07-11 N797SP - Jul 11, 12:35 UTCJul 11, 13:05 UTC30m
2026-07-09 N797SP - Jul 9, 14:10 UTCJul 9, 16:10 UTC2h 0m
2026-07-09 N797SP - Jul 9, 10:50 UTCJul 9, 12:25 UTC1h 35m
2026-07-08 N797SP - Jul 8, 13:05 UTCJul 8, 14:10 UTC1h 5m
2026-07-07 N797SP FMY → FMY Jul 7, 22:30 UTCJul 7, 23:25 UTC55m
2026-07-07 N797SP - Jul 7, 12:55 UTCJul 7, 13:50 UTC55m
2026-07-07 N797SP - Jul 7, 10:55 UTCJul 7, 11:40 UTC45m
2026-07-06 N797SP - Jul 6, 13:15 UTCJul 6, 14:50 UTC1h 35m
2026-07-06 N797SP - Jul 6, 12:10 UTCJul 6, 12:35 UTC25m
2026-07-05 N797SP - Jul 5, 21:35 UTCJul 5, 22:05 UTC30m
2026-07-05 N797SP - Jul 5, 14:00 UTCJul 5, 16:00 UTC2h 0m
2026-07-04 N797SP - Jul 4, 18:55 UTCJul 4, 19:15 UTC20m
2026-07-04 N797SP FMY → VNC Jul 4, 16:05 UTCJul 4, 16:35 UTC30m
2026-07-04 N797SP FMY → FMY Jul 4, 12:40 UTCJul 4, 13:20 UTC40m
2026-07-02 N797SP - Jul 2, 13:15 UTCJul 2, 13:55 UTC40m
2026-07-02 N797SP - Jul 2, 11:30 UTCJul 2, 12:20 UTC50m
2026-07-01 N797SP - Jul 1, 12:50 UTCJul 1, 13:45 UTC55m
2026-07-01 N797SP - Jul 1, 10:55 UTCJul 1, 11:40 UTC45m
2026-06-30 N797SP - Jun 30, 10:45 UTCJun 30, 11:50 UTC1h 5m
2026-06-29 N797SP FMY → FMY Jun 29, 12:00 UTCJun 29, 13:19 UTC1h 20m
2026-06-26 N797SP - Jun 26, 12:14 UTCJun 26, 12:50 UTC35m
2026-06-26 N797SP - Jun 26, 10:50 UTCJun 26, 11:20 UTC30m
2026-06-26 N797SP FMY → FMY Jun 26, 00:50 UTCJun 26, 01:15 UTC25m
2026-06-24 N797SP - Jun 24, 23:24 UTCJun 24, 23:34 UTC10m
2026-06-23 N797SP - Jun 23, 19:59 UTCJun 23, 20:15 UTC15m

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 N797SP page for operator, model, and routing details .

Mode-S AAD3A4 frequently asked

What is Mode-S code AAD3A4?
AAD3A4 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N797SP.
Where is Mode-S AAD3A4 registered?
Mode-S code AAD3A4 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 AAD3A4 broadcasting right now?
No active broadcast right now. Last signal was Jul 25, 17:25 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex AAD3A4, octal 52551644, decimal 11,195,300.
What flights does AAD3A4 operate?
Mode-S AAD3A4 has broadcast 1 distinct callsign, including N797SP.