Apparatus

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sensors Mode-S transponder

A49B94

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N3961F · operated by BALDWIN STEPHEN

Hex
A49B94
Octal
51115624
Decimal
10,787,732
Country
US
Tail
N3961F
Type
C172
No current signal · last broadcast 3d ago
Flights observed
50
Distinct callsigns
1
Country
US
Last broadcast
3d ago

Last known position

Most recent position reported by Mode-S A49B94.

Country allocation

The ICAO 24-bit address A49B94 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
N3961F - 50 2026-07-15

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-15 N3961F - Jul 15, 02:40 UTCJul 15, 03:00 UTC20m
2026-07-14 N3961F - Jul 14, 14:10 UTCJul 14, 14:35 UTC25m
2026-07-13 N3961F - Jul 13, 19:00 UTCJul 13, 19:25 UTC25m
2026-07-09 N3961F - Jul 9, 20:30 UTCJul 9, 21:40 UTC1h 10m
2026-07-09 N3961F - Jul 9, 16:25 UTCJul 9, 16:50 UTC25m
2026-07-08 N3961F - Jul 8, 22:10 UTCJul 8, 22:25 UTC15m
2026-07-08 N3961F - Jul 8, 16:20 UTCJul 8, 16:35 UTC15m
2026-07-07 N3961F - Jul 7, 19:50 UTCJul 7, 20:40 UTC50m
2026-07-07 N3961F - Jul 7, 16:40 UTCJul 7, 17:05 UTC25m
2026-06-24 N3961F - Jun 24, 20:44 UTCJun 24, 21:34 UTC50m
2026-06-24 N3961F - Jun 24, 15:39 UTCJun 24, 16:45 UTC1h 5m
2026-06-23 N3961F - Jun 23, 20:29 UTCJun 23, 20:59 UTC30m
2026-06-23 N3961F - Jun 23, 16:35 UTCJun 23, 17:04 UTC30m
2026-06-18 N3961F - Jun 18, 20:10 UTCJun 18, 20:30 UTC20m
2026-06-18 N3961F - Jun 18, 16:40 UTCJun 18, 17:05 UTC25m
2026-06-17 N3961F - Jun 17, 22:50 UTCJun 17, 23:45 UTC55m
2026-06-17 N3961F - Jun 17, 21:45 UTCJun 17, 21:55 UTC10m
2026-06-17 N3961F - Jun 17, 18:30 UTCJun 17, 18:56 UTC25m
2026-06-16 N3961F - Jun 16, 19:19 UTCJun 16, 19:40 UTC20m
2026-06-16 N3961F - Jun 16, 15:55 UTCJun 16, 16:15 UTC20m
2026-06-15 N3961F - Jun 15, 20:34 UTCJun 15, 20:50 UTC15m
2026-06-15 N3961F - Jun 15, 17:30 UTCJun 15, 17:40 UTC10m
2026-06-11 N3961F - Jun 11, 19:30 UTCJun 11, 20:05 UTC35m
2026-06-11 N3961F - Jun 11, 16:10 UTCJun 11, 16:55 UTC45m
2026-06-10 N3961F - Jun 10, 22:10 UTCJun 10, 23:00 UTC50m
2026-06-10 N3961F - Jun 10, 18:00 UTCJun 10, 19:05 UTC1h 5m
2026-06-01 N3961F - Jun 1, 20:45 UTCJun 1, 21:15 UTC30m
2026-06-01 N3961F - Jun 1, 16:55 UTCJun 1, 17:30 UTC35m
2026-05-28 N3961F - May 28, 19:05 UTCMay 28, 19:15 UTC10m
2026-05-28 N3961F PWT → BFI May 28, 18:05 UTCMay 28, 18:25 UTC20m
2026-05-27 N3961F - May 27, 20:30 UTCMay 27, 21:10 UTC40m
2026-05-27 N3961F - May 27, 16:25 UTCMay 27, 16:50 UTC25m
2026-05-21 N3961F - May 21, 19:10 UTCMay 21, 19:45 UTC35m
2026-05-21 N3961F - May 21, 15:15 UTCMay 21, 15:50 UTC35m
2026-05-20 N3961F - May 20, 19:55 UTCMay 20, 20:10 UTC15m
2026-05-20 N3961F - May 20, 17:10 UTCMay 20, 17:25 UTC15m
2026-05-18 N3961F - May 18, 20:20 UTCMay 18, 21:00 UTC40m
2026-05-18 N3961F - May 18, 16:05 UTCMay 18, 16:45 UTC40m
2026-05-11 N3961F - May 11, 18:25 UTCMay 11, 18:50 UTC25m
2026-05-11 N3961F - May 11, 16:10 UTCMay 11, 16:30 UTC20m
2026-05-09 N3961F - May 9, 18:25 UTCMay 9, 19:40 UTC1h 15m
2026-05-08 N3961F - May 8, 15:45 UTCMay 8, 16:05 UTC20m
2026-04-24 N3961F - Apr 24, 22:30 UTCApr 24, 23:20 UTC50m
2026-04-24 N3961F - Apr 24, 16:20 UTCApr 24, 16:40 UTC20m
2026-04-23 N3961F - Apr 23, 21:10 UTCApr 23, 21:25 UTC15m
2026-04-23 N3961F - Apr 23, 16:50 UTCApr 23, 17:15 UTC25m
2026-04-20 N3961F - Apr 20, 18:00 UTCApr 20, 18:30 UTC30m
2026-04-20 N3961F - Apr 20, 16:00 UTCApr 20, 16:25 UTC25m
2026-04-17 N3961F - Apr 17, 21:35 UTCApr 17, 22:10 UTC35m
2026-04-17 N3961F - Apr 17, 16:05 UTCApr 17, 16:40 UTC35m

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 N3961F page for operator, model, and routing details .

Mode-S A49B94 frequently asked

What is Mode-S code A49B94?
A49B94 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N3961F.
Where is Mode-S A49B94 registered?
Mode-S code A49B94 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 A49B94 broadcasting right now?
No active broadcast right now. Last signal was 3d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A49B94, octal 51115624, decimal 10,787,732.
What flights does A49B94 operate?
Mode-S A49B94 has broadcast 1 distinct callsign, including N3961F.