Apparatus

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sensors Mode-S transponder

A3FB3A

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N356BK · operated by ASRI

Hex
A3FB3A
Octal
50775472
Decimal
10,746,682
Country
US
Tail
N356BK
No current signal · last broadcast 1h ago
Flights observed
151
Distinct callsigns
1
Country
US
Last broadcast
1h ago

Last known position

Most recent position reported by Mode-S A3FB3A.

Country allocation

The ICAO 24-bit address A3FB3A 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
N356BK - 151 2026-07-18

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-18 N356BK PDK → PDK Jul 18, 02:00 UTCJul 18, 02:09 UTC10m
2026-07-17 N356BK - Jul 17, 18:19 UTCJul 17, 18:55 UTC35m
2026-07-17 N356BK - Jul 17, 12:45 UTCJul 17, 13:20 UTC35m
2026-07-16 N356BK - Jul 16, 14:20 UTCJul 16, 16:40 UTC2h 20m
2026-07-16 N356BK - Jul 16, 11:15 UTCJul 16, 13:30 UTC2h 15m
2026-07-15 N356BK - Jul 15, 19:10 UTCJul 15, 20:50 UTC1h 40m
2026-07-14 N356BK - Jul 14, 12:20 UTCJul 14, 14:05 UTC1h 45m
2026-07-13 N356BK - Jul 13, 14:05 UTCJul 13, 16:45 UTC2h 40m
2026-07-12 N356BK - Jul 12, 20:01 UTCJul 12, 21:10 UTC1h 10m
2026-07-12 N356BK - Jul 12, 18:10 UTCJul 12, 19:20 UTC1h 10m
2026-07-11 N356BK - Jul 11, 18:30 UTCJul 11, 19:45 UTC1h 15m
2026-07-11 N356BK - Jul 11, 14:50 UTCJul 11, 15:50 UTC1h 0m
2026-07-10 N356BK - Jul 10, 16:15 UTCJul 10, 18:35 UTC2h 20m
2026-07-10 N356BK - Jul 10, 12:55 UTCJul 10, 15:30 UTC2h 35m
2026-07-09 N356BK - Jul 9, 23:15 UTCJul 10, 02:15 UTC3h 0m
2026-07-07 N356BK - Jul 7, 23:30 UTCJul 7, 23:55 UTC25m
2026-07-07 N356BK - Jul 7, 14:40 UTCJul 7, 17:30 UTC2h 50m
2026-07-06 N356BK - Jul 6, 17:45 UTCJul 6, 19:15 UTC1h 30m
2026-07-06 N356BK - Jul 6, 14:50 UTCJul 6, 15:40 UTC50m
2026-07-06 N356BK - Jul 6, 13:00 UTCJul 6, 13:20 UTC20m
2026-07-05 N356BK - Jul 5, 20:30 UTCJul 5, 21:55 UTC1h 25m
2026-07-05 N356BK - Jul 5, 18:45 UTCJul 5, 19:40 UTC55m
2026-07-05 N356BK - Jul 5, 16:40 UTCJul 5, 17:40 UTC1h 0m
2026-07-05 N356BK - Jul 5, 14:50 UTCJul 5, 15:50 UTC1h 0m
2026-07-05 N356BK - Jul 5, 13:00 UTCJul 5, 14:05 UTC1h 5m
2026-07-04 N356BK - Jul 4, 19:50 UTCJul 4, 22:15 UTC2h 25m
2026-07-04 N356BK - Jul 4, 16:40 UTCJul 4, 19:10 UTC2h 30m
2026-07-03 N356BK - Jul 3, 22:30 UTCJul 4, 00:00 UTC1h 30m
2026-07-03 N356BK - Jul 3, 21:10 UTCJul 3, 21:55 UTC45m
2026-07-03 N356BK - Jul 3, 19:35 UTCJul 3, 20:25 UTC50m
2026-07-03 N356BK - Jul 3, 17:20 UTCJul 3, 18:25 UTC1h 5m
2026-07-01 N356BK - Jul 1, 23:30 UTCJul 2, 00:25 UTC55m
2026-07-01 N356BK - Jul 1, 22:05 UTCJul 1, 22:55 UTC50m
2026-07-01 N356BK - Jul 1, 16:15 UTCJul 1, 18:45 UTC2h 30m
2026-07-01 N356BK - Jul 1, 13:30 UTCJul 1, 14:45 UTC1h 15m
2026-06-28 N356BK - Jun 28, 19:09 UTCJun 28, 20:29 UTC1h 20m
2026-06-28 N356BK - Jun 28, 15:24 UTCJun 28, 17:44 UTC2h 20m
2026-06-24 N356BK - Jun 24, 12:40 UTCJun 24, 15:05 UTC2h 25m
2026-06-23 N356BK - Jun 23, 22:15 UTCJun 23, 23:24 UTC1h 10m
2026-06-21 N356BK - Jun 21, 18:44 UTCJun 21, 20:14 UTC1h 30m
2026-06-21 N356BK - Jun 21, 15:09 UTCJun 21, 16:54 UTC1h 45m
2026-06-20 N356BK - Jun 20, 20:14 UTCJun 20, 20:45 UTC30m
2026-06-20 N356BK - Jun 20, 17:10 UTCJun 20, 19:09 UTC2h 0m
2026-06-19 N356BK - Jun 19, 19:45 UTCJun 19, 20:40 UTC55m
2026-06-19 N356BK - Jun 19, 17:55 UTCJun 19, 18:44 UTC50m
2026-06-18 N356BK - Jun 18, 19:15 UTCJun 18, 20:30 UTC1h 15m
2026-06-18 N356BK - Jun 18, 16:10 UTCJun 18, 18:35 UTC2h 25m
2026-06-14 N356BK - Jun 14, 20:20 UTCJun 14, 21:50 UTC1h 30m
2026-06-14 N356BK - Jun 14, 18:10 UTCJun 14, 19:35 UTC1h 25m
2026-06-14 N356BK - Jun 14, 16:20 UTCJun 14, 16:45 UTC25m

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 N356BK page for operator, model, and routing details .

Mode-S A3FB3A frequently asked

What is Mode-S code A3FB3A?
A3FB3A is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N356BK.
Where is Mode-S A3FB3A registered?
Mode-S code A3FB3A 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 A3FB3A broadcasting right now?
No active broadcast right now. Last signal was 1h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A3FB3A, octal 50775472, decimal 10,746,682.
What flights does A3FB3A operate?
Mode-S A3FB3A has broadcast 1 distinct callsign, including N356BK.