Apparatus

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sensors Mode-S transponder

AA631A

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N769BK · CIRRUS SF-50 Vision · operated by CONTEMPORARY AVIATION LLC

Hex
AA631A
Octal
52461432
Decimal
11,166,490
Country
US
Tail
N769BK
Type
SF50
No current signal · last broadcast 12h ago
Flights observed
53
Distinct callsigns
1
Country
US
Last broadcast
12h ago

Last known position

Most recent position reported by Mode-S AA631A.

Country allocation

The ICAO 24-bit address AA631A 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
N769BK - 53 2026-07-17

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-17 N769BK - Jul 17, 19:49 UTCJul 17, 20:20 UTC30m
2026-07-16 N769BK - Jul 16, 12:05 UTCJul 16, 12:44 UTC40m
2026-07-09 N769BK - Jul 9, 16:20 UTCJul 9, 17:55 UTC1h 35m
2026-07-09 N769BK - Jul 9, 13:45 UTCJul 9, 15:10 UTC1h 25m
2026-07-05 N769BK - Jul 5, 16:55 UTCJul 5, 18:40 UTC1h 45m
2026-07-05 N769BK - Jul 5, 13:50 UTCJul 5, 15:35 UTC1h 45m
2026-06-29 N769BK - Jun 29, 21:19 UTCJun 29, 21:44 UTC25m
2026-06-29 N769BK - Jun 29, 19:44 UTCJun 29, 20:19 UTC35m
2026-06-28 N769BK - Jun 28, 21:20 UTCJun 28, 21:45 UTC25m
2026-06-27 N769BK - Jun 27, 19:00 UTCJun 27, 20:39 UTC1h 40m
2026-06-26 N769BK - Jun 26, 14:59 UTCJun 26, 16:44 UTC1h 45m
2026-06-25 N769BK BGR → BED Jun 25, 15:24 UTCJun 25, 16:09 UTC45m
2026-06-25 N769BK - Jun 25, 13:20 UTCJun 25, 14:04 UTC45m
2026-06-23 N769BK LNS → BED Jun 23, 19:59 UTCJun 23, 21:10 UTC1h 10m
2026-06-22 N769BK - Jun 22, 16:14 UTCJun 22, 17:50 UTC1h 35m
2026-06-21 N769BK - Jun 21, 21:39 UTCJun 21, 22:20 UTC40m
2026-06-19 N769BK - Jun 19, 22:19 UTCJun 19, 22:45 UTC25m
2026-06-19 N769BK - Jun 19, 17:19 UTCJun 19, 18:20 UTC1h 0m
2026-06-19 N769BK - Jun 19, 13:04 UTCJun 19, 16:04 UTC3h 0m
2026-06-17 N769BK - Jun 17, 15:15 UTCJun 17, 16:50 UTC1h 35m
2026-06-17 N769BK - Jun 17, 13:50 UTCJun 17, 15:00 UTC1h 10m
2026-06-16 N769BK - Jun 16, 20:10 UTCJun 16, 22:00 UTC1h 50m
2026-06-16 N769BK - Jun 16, 16:55 UTCJun 16, 17:49 UTC55m
2026-06-16 N769BK - Jun 16, 14:25 UTCJun 16, 15:45 UTC1h 20m
2026-06-10 N769BK - Jun 10, 18:35 UTCJun 10, 21:20 UTC2h 45m
2026-06-10 N769BK - Jun 10, 12:30 UTCJun 10, 15:15 UTC2h 45m
2026-06-05 N769BK ACK → BED Jun 5, 19:25 UTCJun 5, 20:05 UTC40m
2026-06-05 N769BK - Jun 5, 13:20 UTCJun 5, 13:50 UTC30m
2026-06-03 N769BK - Jun 3, 18:25 UTCJun 3, 19:05 UTC40m
2026-06-03 N769BK - Jun 3, 13:05 UTCJun 3, 13:30 UTC25m
2026-05-29 N769BK - May 29, 16:30 UTCMay 29, 19:15 UTC2h 45m
2026-05-25 N769BK - May 25, 15:40 UTCMay 25, 18:40 UTC3h 0m
2026-05-22 N769BK - May 22, 14:05 UTCMay 22, 14:55 UTC50m
2026-05-22 N769BK - May 22, 12:30 UTCMay 22, 13:10 UTC40m
2026-05-18 N769BK - May 18, 17:55 UTCMay 18, 19:10 UTC1h 14m
2026-05-18 N769BK - May 18, 13:25 UTCMay 18, 15:20 UTC1h 55m
2026-05-16 N769BK - May 16, 18:35 UTCMay 16, 19:10 UTC35m
2026-05-16 N769BK - May 16, 13:41 UTCMay 16, 14:11 UTC30m
2026-05-01 N769BK - May 1, 16:45 UTCMay 1, 18:40 UTC1h 55m
2026-05-01 N769BK - May 1, 14:00 UTCMay 1, 15:25 UTC1h 25m
2026-04-28 N769BK - Apr 28, 17:35 UTCApr 28, 19:15 UTC1h 40m
2026-04-28 N769BK - Apr 28, 14:45 UTCApr 28, 16:25 UTC1h 40m
2026-04-27 N769BK - Apr 27, 12:45 UTCApr 27, 13:20 UTC35m
2026-04-25 N769BK - Apr 25, 20:20 UTCApr 25, 20:50 UTC30m
2026-04-24 N769BK - Apr 24, 21:15 UTCApr 24, 21:40 UTC25m
2026-04-20 N769BK - Apr 20, 17:45 UTCApr 20, 18:25 UTC40m
2026-04-20 N769BK - Apr 20, 13:45 UTCApr 20, 14:25 UTC40m
2026-04-15 N769BK - Apr 15, 19:15 UTCApr 15, 19:50 UTC35m
2026-04-15 N769BK - Apr 15, 13:01 UTCApr 15, 13:20 UTC20m
2026-04-14 N769BK - Apr 14, 17:05 UTCApr 14, 17:35 UTC30m

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 N769BK page for operator, model, and routing details .

Mode-S AA631A frequently asked

What is Mode-S code AA631A?
AA631A is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N769BK.
Where is Mode-S AA631A registered?
Mode-S code AA631A 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 AA631A broadcasting right now?
No active broadcast right now. Last signal was 12h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex AA631A, octal 52461432, decimal 11,166,490.
What flights does AA631A operate?
Mode-S AA631A has broadcast 1 distinct callsign, including N769BK.