Apparatus

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sensors Mode-S transponder

ACA97C

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N915CM · CESSNA 172 Skyhawk · operated by VAAYU AVIATION LLC

Hex
ACA97C
Octal
53124574
Decimal
11,315,580
Country
US
Tail
N915CM
Type
C172
No current signal · last broadcast 10h ago
Flights observed
199
Distinct callsigns
1
Country
US
Last broadcast
10h ago

Last known position

Most recent position reported by Mode-S ACA97C.

Country allocation

The ICAO 24-bit address ACA97C 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
N915CM - 199 2026-07-17

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-17 N915CM HWD → HWD Jul 17, 16:55 UTCJul 17, 17:44 UTC50m
2026-07-16 N915CM HWD → HWD Jul 16, 16:05 UTCJul 16, 16:44 UTC40m
2026-07-15 N915CM HWD → HWD Jul 15, 20:30 UTCJul 15, 21:05 UTC35m
2026-07-15 N915CM HWD → HWD Jul 15, 16:45 UTCJul 15, 17:50 UTC1h 5m
2026-07-15 N915CM HWD → HWD Jul 15, 02:00 UTCJul 15, 02:55 UTC55m
2026-07-14 N915CM HWD → HWD Jul 14, 22:05 UTCJul 14, 22:35 UTC30m
2026-07-14 N915CM HWD → HWD Jul 14, 19:45 UTCJul 14, 20:55 UTC1h 10m
2026-07-14 N915CM HWD → HWD Jul 14, 16:25 UTCJul 14, 17:40 UTC1h 15m
2026-07-14 N915CM HWD → HWD Jul 14, 00:40 UTCJul 14, 02:35 UTC1h 55m
2026-07-13 N915CM HWD → HWD Jul 13, 18:45 UTCJul 13, 20:10 UTC1h 25m
2026-07-13 N915CM HWD → HWD Jul 13, 15:55 UTCJul 13, 17:00 UTC1h 5m
2026-07-12 N915CM HWD → HWD Jul 12, 23:45 UTCJul 13, 00:10 UTC25m
2026-07-12 N915CM HWD → HWD Jul 12, 20:40 UTCJul 12, 21:10 UTC30m
2026-07-12 N915CM - Jul 12, 03:05 UTCJul 12, 04:50 UTC1h 45m
2026-07-11 N915CM RDD → RDD Jul 11, 22:15 UTCJul 11, 23:25 UTC1h 10m
2026-07-11 N915CM - Jul 11, 03:55 UTCJul 11, 04:20 UTC25m
2026-07-11 N915CM HWD → RDD Jul 11, 01:25 UTCJul 11, 03:05 UTC1h 40m
2026-07-10 N915CM HWD → HWD Jul 10, 20:40 UTCJul 10, 22:00 UTC1h 20m
2026-07-10 N915CM HWD → HWD Jul 10, 17:35 UTCJul 10, 18:05 UTC30m
2026-07-10 N915CM HWD → HWD Jul 10, 16:05 UTCJul 10, 16:45 UTC40m
2026-07-10 N915CM HWD → HWD Jul 10, 01:15 UTCJul 10, 02:05 UTC50m
2026-07-09 N915CM HWD → HWD Jul 9, 22:30 UTCJul 9, 22:35 UTC5m
2026-07-09 N915CM HWD → HWD Jul 9, 22:15 UTCJul 9, 22:20 UTC5m
2026-07-09 N915CM HWD → HWD Jul 9, 17:05 UTCJul 9, 18:40 UTC1h 35m
2026-07-09 N915CM HWD → HWD Jul 9, 01:05 UTCJul 9, 02:50 UTC1h 45m
2026-07-08 N915CM HWD → HWD Jul 8, 21:05 UTCJul 8, 21:50 UTC45m
2026-07-07 N915CM HWD → HWD Jul 7, 17:40 UTCJul 7, 18:20 UTC40m
2026-07-06 N915CM HWD → HWD Jul 6, 23:35 UTCJul 7, 00:40 UTC1h 5m
2026-07-06 N915CM HWD → HWD Jul 6, 20:45 UTCJul 6, 21:35 UTC50m
2026-07-06 N915CM HWD → HWD Jul 6, 17:45 UTCJul 6, 18:30 UTC45m
2026-07-06 N915CM HWD → HWD Jul 6, 00:40 UTCJul 6, 01:35 UTC55m
2026-07-05 N915CM HWD → HWD Jul 5, 04:00 UTCJul 5, 04:50 UTC50m
2026-07-04 N915CM HWD → HWD Jul 4, 20:25 UTCJul 4, 22:40 UTC2h 15m
2026-07-04 N915CM HWD → HWD Jul 4, 17:40 UTCJul 4, 18:50 UTC1h 10m
2026-07-04 N915CM HWD → HWD Jul 4, 05:10 UTCJul 4, 05:15 UTC5m
2026-07-04 N915CM HWD → HWD Jul 4, 04:55 UTCJul 4, 05:00 UTC5m
2026-07-03 N915CM HWD → HWD Jul 3, 21:45 UTCJul 3, 22:50 UTC1h 5m
2026-07-03 N915CM - Jul 3, 19:30 UTCJul 3, 19:55 UTC25m
2026-07-03 N915CM - Jul 3, 18:45 UTCJul 3, 19:25 UTC40m
2026-07-03 N915CM HWD → HWD Jul 3, 16:30 UTCJul 3, 17:25 UTC55m
2026-07-03 N915CM HWD → HWD Jul 3, 01:55 UTCJul 3, 03:15 UTC1h 20m
2026-07-02 N915CM HWD → HWD Jul 2, 21:55 UTCJul 2, 22:35 UTC40m
2026-07-02 N915CM HWD → HWD Jul 2, 17:50 UTCJul 2, 19:25 UTC1h 35m
2026-07-02 N915CM HWD → HWD Jul 2, 16:00 UTCJul 2, 16:20 UTC20m
2026-07-02 N915CM HWD → HWD Jul 2, 15:25 UTCJul 2, 15:50 UTC25m
2026-07-02 N915CM HWD → HWD Jul 2, 03:10 UTCJul 2, 03:55 UTC45m
2026-07-01 N915CM HWD → HWD Jul 1, 22:15 UTCJul 1, 22:20 UTC5m
2026-07-01 N915CM HWD → HWD Jul 1, 18:55 UTCJul 1, 19:05 UTC10m
2026-06-29 N915CM HWD → HWD Jun 29, 18:10 UTCJun 29, 19:24 UTC1h 15m
2026-06-25 N915CM HWD → HWD Jun 25, 23:09 UTCJun 26, 00:15 UTC1h 5m

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 N915CM page for operator, model, and routing details .

Mode-S ACA97C frequently asked

What is Mode-S code ACA97C?
ACA97C is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N915CM.
Where is Mode-S ACA97C registered?
Mode-S code ACA97C 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 ACA97C broadcasting right now?
No active broadcast right now. Last signal was 10h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex ACA97C, octal 53124574, decimal 11,315,580.
What flights does ACA97C operate?
Mode-S ACA97C has broadcast 1 distinct callsign, including N915CM.