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sensors Mode-S transponder

A44A1B

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N376AF · operated by PILATUS BUSINESS AIRCRAFT LTD

Hex
A44A1B
Octal
51045033
Decimal
10,766,875
Country
US
Tail
N376AF
No current signal · last broadcast Jul 26, 19:15 UTC
Flights observed
46
Distinct callsigns
8
Country
US
Last broadcast
Jul 26, 19:15 UTC

Last known position

Most recent position reported by Mode-S A44A1B.

Country allocation

The ICAO 24-bit address A44A1B 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 8 distinct

Callsign Airline Flights Last seen
CNS210 - 16 2026-07-19
CNS2412 - 13 2026-07-26
CNS476 - 5 2026-07-23
CNS402 - 5 2026-07-22
N376AF - 3 2026-07-25
CNS1 - 2 2026-07-20
CNS513 - 1 2026-05-26
CNS508 - 1 2026-07-15

Recent flights last 46

DateFlightRouteTakeoffLandingDuration
2026-07-26 CNS2412 - Jul 26, 18:25 UTCJul 26, 19:15 UTC50m
2026-07-26 CNS2412 - Jul 26, 16:35 UTCJul 26, 17:05 UTC30m
2026-07-26 CNS2412 - Jul 26, 15:20 UTCJul 26, 15:55 UTC35m
2026-07-26 CNS2412 PVC → BED Jul 26, 13:50 UTCJul 26, 14:20 UTC30m
2026-07-26 CNS2412 - Jul 26, 13:00 UTCJul 26, 13:20 UTC20m
2026-07-25 CNS2412 - Jul 25, 21:20 UTCJul 25, 21:40 UTC20m
2026-07-25 N376AF - Jul 25, 16:50 UTCJul 25, 18:40 UTC1h 50m
2026-07-25 N376AF - Jul 25, 13:40 UTCJul 25, 15:15 UTC1h 35m
2026-07-24 CNS2412 - Jul 24, 21:40 UTCJul 24, 22:10 UTC30m
2026-07-24 CNS2412 - Jul 24, 20:35 UTCJul 24, 21:00 UTC25m
2026-07-24 CNS2412 EWR → OWD Jul 24, 19:05 UTCJul 24, 19:55 UTC50m
2026-07-24 CNS2412 - Jul 24, 17:05 UTCJul 24, 18:10 UTC1h 5m
2026-07-24 CNS2412 - Jul 24, 15:55 UTCJul 24, 16:05 UTC10m
2026-07-24 CNS2412 - Jul 24, 01:05 UTCJul 24, 02:00 UTC55m
2026-07-23 CNS2412 - Jul 23, 23:15 UTCJul 24, 00:20 UTC1h 5m
2026-07-23 CNS476 - Jul 23, 16:45 UTCJul 23, 18:00 UTC1h 15m
2026-07-23 CNS476 - Jul 23, 14:20 UTCJul 23, 14:45 UTC25m
2026-07-23 CNS476 - Jul 23, 12:15 UTCJul 23, 13:10 UTC55m
2026-07-23 CNS476 - Jul 23, 10:55 UTCJul 23, 11:40 UTC45m
2026-07-23 CNS476 - Jul 23, 09:20 UTCJul 23, 09:35 UTC15m
2026-07-22 CNS402 - Jul 22, 23:30 UTCJul 23, 00:55 UTC1h 25m
2026-07-22 CNS402 - Jul 22, 22:15 UTCJul 22, 23:10 UTC55m
2026-07-22 CNS402 - Jul 22, 20:40 UTCJul 22, 20:50 UTC10m
2026-07-22 CNS402 - Jul 22, 18:15 UTCJul 22, 19:00 UTC45m
2026-07-22 CNS402 BED → MVY Jul 22, 16:45 UTCJul 22, 17:10 UTC25m
2026-07-20 CNS1 PSM → BED Jul 20, 20:45 UTCJul 20, 21:00 UTC15m
2026-07-20 CNS1 - Jul 20, 14:00 UTCJul 20, 14:10 UTC10m
2026-07-19 CNS210 - Jul 19, 20:35 UTCJul 19, 22:05 UTC1h 30m
2026-07-19 CNS210 - Jul 19, 18:10 UTCJul 19, 18:35 UTC25m
2026-07-19 CNS210 - Jul 19, 15:35 UTCJul 19, 16:35 UTC1h 0m
2026-07-18 CNS210 - Jul 18, 16:50 UTCJul 18, 17:40 UTC50m
2026-07-18 CNS210 - Jul 18, 15:20 UTCJul 18, 16:15 UTC55m
2026-07-18 CNS210 - Jul 18, 14:05 UTCJul 18, 14:25 UTC20m
2026-07-18 CNS210 - Jul 18, 12:45 UTCJul 18, 13:30 UTC45m
2026-07-17 CNS210 BED → HPN Jul 17, 20:44 UTCJul 17, 22:29 UTC1h 45m
2026-07-17 CNS210 - Jul 17, 19:09 UTCJul 17, 19:40 UTC30m
2026-07-17 CNS210 - Jul 17, 18:10 UTCJul 17, 18:34 UTC25m
2026-07-17 CNS210 - Jul 17, 16:04 UTCJul 17, 16:29 UTC25m
2026-07-16 N376AF - Jul 16, 18:25 UTCJul 16, 22:19 UTC3h 55m
2026-07-16 CNS210 - Jul 16, 14:10 UTCJul 16, 16:05 UTC1h 55m
2026-07-16 CNS210 ABE → MTN Jul 16, 12:55 UTCJul 16, 13:34 UTC40m
2026-07-15 CNS210 - Jul 15, 22:25 UTCJul 16, 00:20 UTC1h 55m
2026-07-15 CNS210 - Jul 15, 19:25 UTCJul 15, 20:00 UTC35m
2026-07-15 CNS210 - Jul 15, 18:15 UTCJul 15, 18:55 UTC40m
2026-07-15 CNS508 - Jul 15, 16:15 UTCJul 15, 16:30 UTC15m
2026-05-26 CNS513 - May 26, 15:14 UTCMay 26, 16:24 UTC1h 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 N376AF page for operator, model, and routing details .

Mode-S A44A1B frequently asked

What is Mode-S code A44A1B?
A44A1B is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N376AF.
Where is Mode-S A44A1B registered?
Mode-S code A44A1B 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 A44A1B broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 19:15 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A44A1B, octal 51045033, decimal 10,766,875.
What flights does A44A1B operate?
Mode-S A44A1B has broadcast 8 distinct callsigns, including CNS210, CNS2412, CNS476, CNS402, N376AF.