Apparatus

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sensors Mode-S transponder

A8C7DF

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N665M · operated by FAIR HAVEN AVIATION LLC

Hex
A8C7DF
Octal
52143737
Decimal
11,061,215
Country
US
Tail
N665M
Type
SR20
No current signal · last broadcast 5d ago
Flights observed
85
Distinct callsigns
1
Country
US
Last broadcast
5d ago

Last known position

Most recent position reported by Mode-S A8C7DF.

Country allocation

The ICAO 24-bit address A8C7DF 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
N665M - 85 2026-07-09

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-09 N665M - Jul 9, 19:10 UTCJul 9, 19:15 UTC5m
2026-07-09 N665M SQL → SQL Jul 9, 18:45 UTCJul 9, 18:55 UTC10m
2026-07-09 N665M SQL → SQL Jul 9, 18:30 UTCJul 9, 18:40 UTC10m
2026-07-09 N665M SQL → SQL Jul 9, 18:15 UTCJul 9, 18:20 UTC5m
2026-07-06 N665M - Jul 6, 21:35 UTCJul 6, 22:00 UTC25m
2026-07-06 N665M - Jul 6, 19:50 UTCJul 6, 20:20 UTC30m
2026-07-04 N665M SQL → SQL Jul 4, 18:20 UTCJul 4, 20:35 UTC2h 15m
2026-07-03 N665M SQL → SQL Jul 3, 19:55 UTCJul 3, 21:35 UTC1h 40m
2026-07-03 N665M - Jul 3, 16:05 UTCJul 3, 16:25 UTC20m
2026-07-03 N665M SQL → SQL Jul 3, 15:45 UTCJul 3, 15:50 UTC5m
2026-07-03 N665M SQL → SQL Jul 3, 05:45 UTCJul 3, 05:55 UTC10m
2026-07-03 N665M SQL → SQL Jul 3, 05:30 UTCJul 3, 05:40 UTC10m
2026-07-03 N665M SQL → SQL Jul 3, 05:05 UTCJul 3, 05:15 UTC10m
2026-07-03 N665M SQL → SQL Jul 3, 04:55 UTCJul 3, 05:00 UTC5m
2026-07-02 N665M SQL → SQL Jul 2, 22:40 UTCJul 3, 01:00 UTC2h 20m
2026-07-01 N665M PAO → SQL Jul 1, 00:45 UTCJul 1, 00:50 UTC5m
2026-06-30 N665M SQL → PAO Jun 30, 17:20 UTCJun 30, 17:30 UTC10m
2026-06-28 N665M SQL → SQL Jun 28, 17:39 UTCJun 28, 18:40 UTC1h 0m
2026-06-25 N665M - Jun 25, 21:25 UTCJun 25, 21:50 UTC25m
2026-06-25 N665M - Jun 25, 19:49 UTCJun 25, 20:14 UTC25m
2026-06-24 N665M SQL → SQL Jun 24, 18:44 UTCJun 24, 19:59 UTC1h 15m
2026-06-21 N665M SQL → SQL Jun 21, 22:00 UTCJun 21, 23:40 UTC1h 40m
2026-06-19 N665M SQL → SQL Jun 19, 18:49 UTCJun 19, 20:34 UTC1h 45m
2026-06-18 N665M - Jun 18, 19:10 UTCJun 18, 19:55 UTC45m
2026-06-18 N665M - Jun 18, 18:05 UTCJun 18, 18:40 UTC35m
2026-06-18 N665M SQL → HWD Jun 18, 17:21 UTCJun 18, 17:30 UTC9m
2026-06-12 N665M SMO → SQL Jun 12, 21:30 UTCJun 12, 23:35 UTC2h 5m
2026-06-11 N665M SQL → SMO Jun 11, 20:50 UTCJun 11, 23:10 UTC2h 20m
2026-06-05 N665M SQL → SQL Jun 5, 18:15 UTCJun 5, 20:30 UTC2h 15m
2026-06-04 N665M SQL → SQL Jun 4, 00:20 UTCJun 4, 01:40 UTC1h 20m
2026-06-03 N665M SQL → SQL Jun 3, 19:50 UTCJun 3, 22:00 UTC2h 10m
2026-06-01 N665M SQL → SQL Jun 1, 18:35 UTCJun 1, 21:15 UTC2h 40m
2026-05-31 N665M - May 31, 19:30 UTCMay 31, 20:15 UTC45m
2026-05-31 N665M - May 31, 18:00 UTCMay 31, 18:45 UTC45m
2026-05-30 N665M SQL → SQL May 30, 18:00 UTCMay 30, 19:50 UTC1h 50m
2026-05-21 N665M - May 21, 00:35 UTCMay 21, 01:00 UTC25m
2026-05-20 N665M - May 20, 23:40 UTCMay 21, 00:05 UTC25m
2026-05-20 N665M - May 20, 21:40 UTCMay 20, 21:55 UTC15m
2026-05-20 N665M - May 20, 19:25 UTCMay 20, 19:55 UTC30m
2026-05-19 N665M - May 19, 23:05 UTCMay 19, 23:20 UTC15m
2026-05-19 N665M - May 19, 21:45 UTCMay 19, 21:55 UTC10m
2026-05-15 N665M SQL → SQL May 15, 18:20 UTCMay 15, 20:00 UTC1h 40m
2026-05-14 N665M - May 14, 21:10 UTCMay 14, 21:35 UTC25m
2026-05-14 N665M SQL → SQL May 14, 20:55 UTCMay 14, 21:05 UTC10m
2026-05-14 N665M SQL → SQL May 14, 19:50 UTCMay 14, 20:50 UTC1h 0m
2026-05-13 N665M - May 13, 22:30 UTCMay 13, 23:10 UTC40m
2026-05-13 N665M - May 13, 18:50 UTCMay 13, 19:25 UTC35m
2026-05-12 N665M SQL → SQL May 12, 22:31 UTCMay 12, 23:35 UTC1h 5m
2026-05-11 N665M SQL → SQL May 11, 18:05 UTCMay 11, 19:00 UTC55m
2026-05-10 N665M SQL → SQL May 10, 21:10 UTCMay 10, 22:09 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 N665M page for operator, model, and routing details .

Mode-S A8C7DF frequently asked

What is Mode-S code A8C7DF?
A8C7DF is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N665M.
Where is Mode-S A8C7DF registered?
Mode-S code A8C7DF 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 A8C7DF broadcasting right now?
No active broadcast right now. Last signal was 5d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A8C7DF, octal 52143737, decimal 11,061,215.
What flights does A8C7DF operate?
Mode-S A8C7DF has broadcast 1 distinct callsign, including N665M.