Apparatus

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sensors Mode-S transponder

A8D391

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N668SR · CIRRUS SR-22 · operated by LATITUDE AVIATION LLC

Hex
A8D391
Octal
52151621
Decimal
11,064,209
Country
US
Tail
N668SR
Type
SR22
No current signal · last broadcast 28d ago
Flights observed
50
Distinct callsigns
1
Country
US
Last broadcast
28d ago

Last known position

Most recent position reported by Mode-S A8D391.

Country allocation

The ICAO 24-bit address A8D391 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
N668SR - 49 2026-06-15

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-06-15 N668SR - Jun 15, 15:35 UTCJun 15, 16:04 UTC30m
2026-06-08 N668SR LNS → PNE Jun 8, 20:15 UTCJun 8, 20:45 UTC30m
2026-06-08 N668SR - Jun 8, 14:10 UTCJun 8, 14:35 UTC25m
2026-06-04 N668SR LNS → PNE Jun 4, 20:30 UTCJun 4, 21:00 UTC30m
2026-06-04 - LNS → LNS Jun 4, 15:50 UTCJun 4, 16:20 UTC30m
2026-06-04 N668SR - Jun 4, 14:55 UTCJun 4, 15:25 UTC30m
2026-05-22 N668SR - May 22, 14:30 UTCMay 22, 15:00 UTC30m
2026-05-20 N668SR - May 20, 15:20 UTCMay 20, 16:00 UTC40m
2026-05-20 N668SR - May 20, 12:20 UTCMay 20, 13:00 UTC40m
2026-05-14 N668SR - May 14, 18:20 UTCMay 14, 19:30 UTC1h 10m
2026-05-14 N668SR - May 14, 14:40 UTCMay 14, 14:50 UTC10m
2026-05-12 N668SR - May 12, 16:05 UTCMay 12, 16:40 UTC35m
2026-05-11 N668SR - May 11, 19:05 UTCMay 11, 19:20 UTC15m
2026-05-11 N668SR LNS → LNS May 11, 16:35 UTCMay 11, 16:40 UTC5m
2026-05-09 N668SR LNS → LNS May 9, 17:49 UTCMay 9, 18:00 UTC10m
2026-05-09 N668SR LNS → LNS May 9, 16:50 UTCMay 9, 17:00 UTC10m
2026-05-09 N668SR LNS → LNS May 9, 14:45 UTCMay 9, 14:50 UTC5m
2026-05-09 N668SR LNS → LNS May 9, 14:20 UTCMay 9, 14:25 UTC5m
2026-05-08 N668SR LNS → LNS May 8, 20:10 UTCMay 8, 20:15 UTC5m
2026-05-08 N668SR LNS → LNS May 8, 19:35 UTCMay 8, 19:40 UTC5m
2026-05-08 N668SR LNS → LNS May 8, 18:55 UTCMay 8, 19:00 UTC5m
2026-05-07 N668SR LNS → LNS May 7, 13:30 UTCMay 7, 13:35 UTC5m
2026-05-07 N668SR LNS → LNS May 7, 13:05 UTCMay 7, 13:15 UTC10m
2026-05-07 N668SR LNS → LNS May 7, 12:40 UTCMay 7, 12:45 UTC5m
2026-05-06 N668SR LNS → LNS May 6, 17:15 UTCMay 6, 17:20 UTC5m
2026-05-06 N668SR LNS → LNS May 6, 14:20 UTCMay 6, 14:35 UTC15m
2026-05-06 N668SR LNS → LNS May 6, 14:10 UTCMay 6, 14:15 UTC5m
2026-05-01 N668SR LNS → LNS May 1, 17:20 UTCMay 1, 17:25 UTC5m
2026-04-28 N668SR LNS → LNS Apr 28, 18:25 UTCApr 28, 18:50 UTC25m
2026-04-28 N668SR LNS → LNS Apr 28, 17:45 UTCApr 28, 17:50 UTC5m
2026-04-28 N668SR LNS → LNS Apr 28, 16:00 UTCApr 28, 16:05 UTC5m
2026-04-23 N668SR LNS → LNS Apr 23, 19:10 UTCApr 23, 19:15 UTC5m
2026-04-23 N668SR LNS → LNS Apr 23, 18:55 UTCApr 23, 19:00 UTC5m
2026-04-23 N668SR LNS → LNS Apr 23, 18:05 UTCApr 23, 18:10 UTC5m
2026-04-23 N668SR LNS → LNS Apr 23, 17:00 UTCApr 23, 17:05 UTC5m
2026-04-23 N668SR LNS → LNS Apr 23, 16:35 UTCApr 23, 16:40 UTC5m
2026-04-23 N668SR LNS → LNS Apr 23, 14:30 UTCApr 23, 14:35 UTC5m
2026-04-23 N668SR LNS → LNS Apr 23, 13:15 UTCApr 23, 13:25 UTC10m
2026-04-23 N668SR LNS → LNS Apr 23, 12:50 UTCApr 23, 13:05 UTC15m
2026-04-23 N668SR LNS → LNS Apr 23, 12:35 UTCApr 23, 12:40 UTC5m
2026-04-22 N668SR LNS → LNS Apr 22, 20:15 UTCApr 22, 20:25 UTC10m
2026-04-22 N668SR LNS → LNS Apr 22, 20:00 UTCApr 22, 20:05 UTC5m
2026-04-22 N668SR LNS → LNS Apr 22, 19:30 UTCApr 22, 19:35 UTC5m
2026-04-22 N668SR LNS → LNS Apr 22, 14:05 UTCApr 22, 14:25 UTC20m
2026-04-22 N668SR LNS → LNS Apr 22, 12:25 UTCApr 22, 12:30 UTC5m
2026-04-21 N668SR LNS → LNS Apr 21, 20:05 UTCApr 21, 20:15 UTC10m
2026-04-21 N668SR LNS → LNS Apr 21, 19:45 UTCApr 21, 20:00 UTC15m
2026-04-21 N668SR LNS → LNS Apr 21, 15:01 UTCApr 21, 15:05 UTC5m
2026-04-15 N668SR - Apr 15, 13:15 UTCApr 15, 13:35 UTC20m
2026-04-14 N668SR - Apr 14, 13:00 UTCApr 14, 13:15 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 N668SR page for operator, model, and routing details .

Mode-S A8D391 frequently asked

What is Mode-S code A8D391?
A8D391 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N668SR.
Where is Mode-S A8D391 registered?
Mode-S code A8D391 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 A8D391 broadcasting right now?
No active broadcast right now. Last signal was 28d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A8D391, octal 52151621, decimal 11,064,209.
What flights does A8D391 operate?
Mode-S A8D391 has broadcast 1 distinct callsign, including N668SR.