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sensors Mode-S transponder

AA97A7

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N78174 · CESSNA 172 Skyhawk · operated by SPENCER AVIATION INC

Hex
AA97A7
Octal
52513647
Decimal
11,179,943
Country
US
Tail
N78174
Type
C172
No current signal · last broadcast 1d ago
Flights observed
137
Distinct callsigns
1
Country
US
Last broadcast
1d ago

Last known position

Most recent position reported by Mode-S AA97A7.

Country allocation

The ICAO 24-bit address AA97A7 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
N78174 - 137 2026-07-16

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-16 N78174 - Jul 16, 21:10 UTCJul 16, 21:35 UTC25m
2026-07-16 N78174 - Jul 16, 18:40 UTCJul 16, 19:50 UTC1h 10m
2026-07-16 N78174 - Jul 16, 16:44 UTCJul 16, 17:45 UTC1h 0m
2026-07-16 N78174 - Jul 16, 15:00 UTCJul 16, 15:55 UTC55m
2026-07-16 N78174 - Jul 16, 12:44 UTCJul 16, 13:20 UTC35m
2026-07-15 N78174 - Jul 15, 22:35 UTCJul 15, 23:55 UTC1h 20m
2026-07-15 N78174 - Jul 15, 20:45 UTCJul 15, 21:55 UTC1h 10m
2026-07-15 N78174 - Jul 15, 17:30 UTCJul 15, 18:40 UTC1h 10m
2026-07-15 N78174 - Jul 15, 14:45 UTCJul 15, 15:40 UTC55m
2026-07-15 N78174 - Jul 15, 12:20 UTCJul 15, 12:40 UTC20m
2026-07-14 N78174 - Jul 14, 20:05 UTCJul 14, 21:15 UTC1h 10m
2026-07-14 N78174 - Jul 14, 12:25 UTCJul 14, 13:05 UTC40m
2026-07-14 N78174 - Jul 14, 10:30 UTCJul 14, 11:30 UTC1h 0m
2026-07-13 N78174 - Jul 13, 18:55 UTCJul 13, 20:40 UTC1h 45m
2026-07-13 N78174 - Jul 13, 17:10 UTCJul 13, 17:50 UTC40m
2026-07-10 N78174 - Jul 10, 18:50 UTCJul 10, 19:25 UTC35m
2026-07-10 N78174 - Jul 10, 16:45 UTCJul 10, 17:55 UTC1h 10m
2026-07-09 N78174 - Jul 9, 18:00 UTCJul 9, 18:55 UTC55m
2026-07-09 N78174 - Jul 9, 13:05 UTCJul 9, 15:10 UTC2h 5m
2026-07-08 N78174 - Jul 8, 20:55 UTCJul 8, 22:05 UTC1h 10m
2026-07-08 N78174 - Jul 8, 18:30 UTCJul 8, 19:45 UTC1h 15m
2026-07-08 N78174 - Jul 8, 15:05 UTCJul 8, 15:55 UTC50m
2026-07-03 N78174 - Jul 3, 16:35 UTCJul 3, 17:05 UTC30m
2026-07-03 N78174 - Jul 3, 14:50 UTCJul 3, 15:50 UTC1h 0m
2026-07-02 N78174 - Jul 2, 20:45 UTCJul 2, 22:00 UTC1h 15m
2026-07-02 N78174 - Jul 2, 17:25 UTCJul 2, 18:20 UTC55m
2026-07-02 N78174 - Jul 2, 13:55 UTCJul 2, 14:05 UTC10m
2026-07-02 N78174 - Jul 2, 12:30 UTCJul 2, 13:05 UTC35m
2026-07-01 N78174 - Jul 1, 14:35 UTCJul 1, 15:05 UTC30m
2026-07-01 N78174 - Jul 1, 12:30 UTCJul 1, 13:05 UTC35m
2026-06-30 N78174 - Jun 30, 16:25 UTCJun 30, 17:45 UTC1h 20m
2026-06-29 N78174 - Jun 29, 20:15 UTCJun 29, 21:34 UTC1h 20m
2026-06-29 N78174 - Jun 29, 15:14 UTCJun 29, 15:49 UTC35m
2026-06-28 N78174 - Jun 28, 18:55 UTCJun 28, 19:49 UTC55m
2026-06-26 N78174 - Jun 26, 14:59 UTCJun 26, 15:45 UTC45m
2026-06-25 N78174 - Jun 25, 12:30 UTCJun 25, 13:35 UTC1h 5m
2026-06-24 N78174 - Jun 24, 20:49 UTCJun 24, 22:04 UTC1h 15m
2026-06-24 N78174 - Jun 24, 19:10 UTCJun 24, 20:14 UTC1h 5m
2026-06-24 N78174 - Jun 24, 17:45 UTCJun 24, 17:55 UTC10m
2026-06-24 N78174 - Jun 24, 14:34 UTCJun 24, 15:09 UTC35m
2026-06-23 N78174 - Jun 23, 15:04 UTCJun 23, 16:09 UTC1h 5m
2026-06-23 N78174 - Jun 23, 12:29 UTCJun 23, 13:55 UTC1h 25m
2026-06-19 N78174 - Jun 19, 19:45 UTCJun 19, 20:49 UTC1h 5m
2026-06-17 N78174 - Jun 17, 15:10 UTCJun 17, 15:55 UTC45m
2026-06-16 N78174 - Jun 16, 18:39 UTCJun 16, 19:19 UTC40m
2026-06-16 N78174 - Jun 16, 15:05 UTCJun 16, 15:45 UTC40m
2026-06-15 N78174 - Jun 15, 19:39 UTCJun 15, 20:59 UTC1h 20m
2026-06-15 N78174 - Jun 15, 16:19 UTCJun 15, 17:34 UTC1h 15m
2026-06-13 N78174 - Jun 13, 21:20 UTCJun 13, 22:50 UTC1h 30m
2026-06-13 N78174 - Jun 13, 13:00 UTCJun 13, 14:00 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 N78174 page for operator, model, and routing details .

Mode-S AA97A7 frequently asked

What is Mode-S code AA97A7?
AA97A7 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N78174.
Where is Mode-S AA97A7 registered?
Mode-S code AA97A7 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 AA97A7 broadcasting right now?
No active broadcast right now. Last signal was 1d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex AA97A7, octal 52513647, decimal 11,179,943.
What flights does AA97A7 operate?
Mode-S AA97A7 has broadcast 1 distinct callsign, including N78174.