Apparatus

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sensors Mode-S transponder

A85F3B

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N639AR · BEECH 58 Baron · operated by BRADEN HEALTH LLC

Hex
A85F3B
Octal
52057473
Decimal
11,034,427
Country
US
Tail
N639AR
Type
BE58
No current signal · last broadcast Jul 22, 22:35 UTC
Flights observed
65
Distinct callsigns
1
Country
US
Last broadcast
Jul 22, 22:35 UTC

Last known position

Most recent position reported by Mode-S A85F3B.

Country allocation

The ICAO 24-bit address A85F3B 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
N639AR - 65 2026-07-22

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-22 N639AR - Jul 22, 22:10 UTCJul 22, 22:35 UTC25m
2026-07-22 N639AR - Jul 22, 20:35 UTCJul 22, 21:30 UTC55m
2026-07-20 N639AR - Jul 20, 18:40 UTCJul 20, 19:45 UTC1h 5m
2026-07-20 N639AR - Jul 20, 15:00 UTCJul 20, 16:00 UTC1h 0m
2026-07-18 N639AR - Jul 18, 23:45 UTCJul 19, 00:15 UTC30m
2026-07-18 N639AR - Jul 18, 22:20 UTCJul 18, 22:50 UTC30m
2026-07-18 N639AR - Jul 18, 17:15 UTCJul 18, 18:45 UTC1h 30m
2026-07-18 N639AR - Jul 18, 14:40 UTCJul 18, 16:30 UTC1h 50m
2026-07-18 N639AR - Jul 18, 13:50 UTCJul 18, 14:05 UTC15m
2026-07-16 N639AR - Jul 16, 05:00 UTCJul 16, 05:25 UTC25m
2026-07-16 N639AR - Jul 16, 01:00 UTCJul 16, 01:35 UTC35m
2026-07-15 N639AR - Jul 15, 19:00 UTCJul 15, 19:30 UTC30m
2026-07-15 N639AR - Jul 15, 15:20 UTCJul 15, 17:05 UTC1h 45m
2026-07-15 N639AR - Jul 15, 13:00 UTCJul 15, 14:30 UTC1h 30m
2026-07-14 N639AR - Jul 14, 12:05 UTCJul 14, 14:25 UTC2h 20m
2026-07-14 N639AR - Jul 14, 09:20 UTCJul 14, 11:25 UTC2h 5m
2026-07-13 N639AR - Jul 13, 15:35 UTCJul 13, 17:40 UTC2h 5m
2026-07-13 N639AR - Jul 13, 11:40 UTCJul 13, 14:50 UTC3h 10m
2026-06-29 N639AR - Jun 29, 20:35 UTCJun 29, 22:39 UTC2h 5m
2026-06-29 N639AR - Jun 29, 17:40 UTCJun 29, 19:35 UTC1h 55m
2026-06-26 N639AR - Jun 26, 20:55 UTCJun 26, 23:09 UTC2h 15m
2026-06-26 N639AR - Jun 26, 12:24 UTCJun 26, 14:19 UTC1h 55m
2026-06-25 N639AR - Jun 25, 02:54 UTCJun 25, 05:09 UTC2h 15m
2026-06-24 N639AR - Jun 24, 23:59 UTCJun 25, 02:19 UTC2h 20m
2026-06-23 N639AR - Jun 23, 00:15 UTCJun 23, 02:40 UTC2h 25m
2026-06-22 N639AR - Jun 22, 21:54 UTCJun 22, 23:39 UTC1h 45m
2026-06-22 N639AR - Jun 22, 11:30 UTCJun 22, 12:40 UTC1h 10m
2026-06-22 N639AR - Jun 22, 00:14 UTCJun 22, 01:15 UTC1h 0m
2026-06-21 N639AR - Jun 21, 23:05 UTCJun 21, 23:40 UTC35m
2026-06-21 N639AR - Jun 21, 19:45 UTCJun 21, 21:49 UTC2h 5m
2026-06-21 N639AR - Jun 21, 18:35 UTCJun 21, 18:54 UTC20m
2026-06-19 N639AR - Jun 19, 19:34 UTCJun 19, 21:49 UTC2h 15m
2026-06-19 N639AR - Jun 19, 10:59 UTCJun 19, 13:09 UTC2h 10m
2026-06-16 N639AR - Jun 16, 17:40 UTCJun 16, 20:05 UTC2h 26m
2026-06-16 N639AR - Jun 16, 15:55 UTCJun 16, 16:10 UTC15m
2026-06-16 N639AR - Jun 16, 13:30 UTCJun 16, 15:15 UTC1h 45m
2026-06-10 N639AR - Jun 10, 21:30 UTCJun 10, 23:30 UTC2h 0m
2026-06-10 N639AR - Jun 10, 18:55 UTCJun 10, 20:45 UTC1h 50m
2026-06-06 N639AR - Jun 6, 20:19 UTCJun 6, 22:25 UTC2h 5m
2026-06-05 N639AR - Jun 5, 17:15 UTCJun 5, 19:10 UTC1h 55m
2026-06-01 N639AR - Jun 1, 19:10 UTCJun 1, 19:35 UTC25m
2026-06-01 N639AR - Jun 1, 15:00 UTCJun 1, 17:15 UTC2h 15m
2026-06-01 N639AR - Jun 1, 13:55 UTCJun 1, 14:10 UTC15m
2026-06-01 N639AR - Jun 1, 11:35 UTCJun 1, 13:15 UTC1h 40m
2026-05-28 N639AR - May 28, 22:25 UTCMay 29, 00:25 UTC2h 0m
2026-05-28 N639AR - May 28, 17:25 UTCMay 28, 20:10 UTC2h 45m
2026-05-28 N639AR - May 28, 15:05 UTCMay 28, 16:35 UTC1h 30m
2026-05-26 N639AR - May 26, 12:54 UTCMay 26, 14:24 UTC1h 30m
2026-05-26 N639AR - May 26, 10:39 UTCMay 26, 12:14 UTC1h 35m
2026-05-20 N639AR - May 20, 21:10 UTCMay 20, 23:20 UTC2h 10m

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 N639AR page for operator, model, and routing details .

Mode-S A85F3B frequently asked

What is Mode-S code A85F3B?
A85F3B is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N639AR.
Where is Mode-S A85F3B registered?
Mode-S code A85F3B 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 A85F3B broadcasting right now?
No active broadcast right now. Last signal was Jul 22, 22:35 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A85F3B, octal 52057473, decimal 11,034,427.
What flights does A85F3B operate?
Mode-S A85F3B has broadcast 1 distinct callsign, including N639AR.