Apparatus

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sensors Mode-S transponder

A65A8D

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N5084A · CESSNA 172 Skyhawk · operated by OSTERBERG DOUGLAS L, OSTERBERG LAURIE A

Hex
A65A8D
Octal
51455215
Decimal
10,902,157
Country
US
Tail
N5084A
Type
C172
No current signal · last broadcast 9d ago
Flights observed
57
Distinct callsigns
1
Country
US
Last broadcast
9d ago

Last known position

Most recent position reported by Mode-S A65A8D.

Country allocation

The ICAO 24-bit address A65A8D 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
N5084A - 57 2026-07-11

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-11 N5084A - Jul 11, 17:45 UTCJul 11, 17:50 UTC5m
2026-07-11 N5084A - Jul 11, 17:20 UTCJul 11, 17:40 UTC20m
2026-07-11 N5084A - Jul 11, 17:05 UTCJul 11, 17:10 UTC5m
2026-07-11 N5084A - Jul 11, 14:25 UTCJul 11, 16:25 UTC2h 0m
2026-07-10 N5084A - Jul 10, 20:05 UTCJul 10, 20:25 UTC20m
2026-07-10 N5084A - Jul 10, 18:55 UTCJul 10, 19:15 UTC20m
2026-07-06 N5084A - Jul 6, 23:15 UTCJul 6, 23:25 UTC10m
2026-07-06 N5084A - Jul 6, 22:15 UTCJul 6, 22:30 UTC15m
2026-07-06 N5084A - Jul 6, 19:10 UTCJul 6, 19:25 UTC15m
2026-07-03 N5084A - Jul 3, 19:55 UTCJul 3, 20:30 UTC35m
2026-07-03 N5084A - Jul 3, 18:30 UTCJul 3, 19:50 UTC1h 20m
2026-07-03 N5084A - Jul 3, 14:35 UTCJul 3, 14:50 UTC15m
2026-07-03 N5084A - Jul 3, 13:30 UTCJul 3, 14:05 UTC35m
2026-07-01 N5084A - Jul 1, 15:20 UTCJul 1, 16:25 UTC1h 5m
2026-06-30 N5084A - Jun 30, 16:45 UTCJun 30, 18:20 UTC1h 35m
2026-06-27 N5084A - Jun 27, 18:54 UTCJun 27, 20:09 UTC1h 15m
2026-06-27 N5084A - Jun 27, 00:34 UTCJun 27, 00:44 UTC10m
2026-06-26 N5084A - Jun 26, 23:00 UTCJun 26, 23:39 UTC40m
2026-06-26 N5084A - Jun 26, 18:09 UTCJun 26, 18:24 UTC15m
2026-06-26 N5084A - Jun 26, 16:35 UTCJun 26, 16:49 UTC15m
2026-06-25 N5084A - Jun 25, 20:25 UTCJun 25, 20:34 UTC10m
2026-06-25 N5084A - Jun 25, 19:59 UTCJun 25, 20:19 UTC20m
2026-06-24 N5084A - Jun 24, 00:59 UTCJun 24, 01:09 UTC10m
2026-06-23 N5084A - Jun 23, 23:10 UTCJun 24, 00:15 UTC1h 5m
2026-06-23 N5084A - Jun 23, 14:10 UTCJun 23, 15:30 UTC1h 20m
2026-06-22 N5084A - Jun 22, 13:29 UTCJun 22, 14:49 UTC1h 20m
2026-06-21 N5084A - Jun 21, 20:14 UTCJun 21, 21:14 UTC1h 0m
2026-06-20 N5084A - Jun 20, 16:44 UTCJun 20, 16:59 UTC15m
2026-06-20 N5084A - Jun 20, 14:05 UTCJun 20, 15:29 UTC1h 25m
2026-06-20 N5084A - Jun 20, 12:39 UTCJun 20, 12:50 UTC10m
2026-06-19 N5084A - Jun 19, 18:25 UTCJun 19, 19:09 UTC45m
2026-06-05 N5084A - Jun 5, 13:25 UTCJun 5, 14:10 UTC45m
2026-06-03 N5084A - Jun 3, 14:05 UTCJun 3, 14:35 UTC30m
2026-06-03 N5084A - Jun 3, 13:15 UTCJun 3, 13:30 UTC15m
2026-06-01 N5084A - Jun 1, 21:55 UTCJun 1, 23:30 UTC1h 35m
2026-05-29 N5084A - May 29, 13:20 UTCMay 29, 14:05 UTC45m
2026-05-28 N5084A - May 28, 14:10 UTCMay 28, 14:35 UTC25m
2026-05-28 N5084A - May 28, 13:25 UTCMay 28, 14:05 UTC40m
2026-05-27 N5084A - May 27, 13:55 UTCMay 27, 14:05 UTC10m
2026-05-27 N5084A - May 27, 13:15 UTCMay 27, 13:45 UTC30m
2026-05-25 N5084A - May 25, 14:00 UTCMay 25, 14:30 UTC30m
2026-05-25 N5084A - May 25, 13:25 UTCMay 25, 13:55 UTC30m
2026-05-21 N5084A - May 21, 14:10 UTCMay 21, 14:40 UTC30m
2026-05-11 N5084A - May 11, 20:25 UTCMay 11, 21:30 UTC1h 5m
2026-05-10 N5084A - May 10, 12:49 UTCMay 10, 14:00 UTC1h 10m
2026-05-08 N5084A - May 8, 16:30 UTCMay 8, 17:25 UTC55m
2026-05-08 N5084A - May 8, 14:10 UTCMay 8, 15:20 UTC1h 10m
2026-05-02 N5084A - May 2, 16:40 UTCMay 2, 17:45 UTC1h 5m
2026-05-01 N5084A - May 1, 14:10 UTCMay 1, 14:25 UTC15m
2026-04-25 N5084A - Apr 25, 15:55 UTCApr 25, 17:50 UTC1h 55m

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 N5084A page for operator, model, and routing details .

Mode-S A65A8D frequently asked

What is Mode-S code A65A8D?
A65A8D is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N5084A.
Where is Mode-S A65A8D registered?
Mode-S code A65A8D 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 A65A8D broadcasting right now?
No active broadcast right now. Last signal was 9d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A65A8D, octal 51455215, decimal 10,902,157.
What flights does A65A8D operate?
Mode-S A65A8D has broadcast 1 distinct callsign, including N5084A.