Apparatus

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sensors Mode-S transponder

A351C1

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N3128T · PIPER PA-44 Seminole · operated by WINGSLEASING LLC

Hex
A351C1
Octal
50650701
Decimal
10,703,297
Country
US
Tail
N3128T
Type
PA44
No current signal · last broadcast Jul 26, 17:45 UTC
Flights observed
107
Distinct callsigns
1
Country
US
Last broadcast
Jul 26, 17:45 UTC

Last known position

Most recent position reported by Mode-S A351C1.

Country allocation

The ICAO 24-bit address A351C1 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
N3128T - 107 2026-07-26

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 N3128T BJC → BJC Jul 26, 16:30 UTCJul 26, 17:45 UTC1h 15m
2026-07-26 N3128T - Jul 26, 13:30 UTCJul 26, 14:30 UTC1h 0m
2026-07-26 N3128T - Jul 26, 13:00 UTCJul 26, 13:25 UTC25m
2026-07-23 N3128T BJC → BJC Jul 23, 03:50 UTCJul 23, 04:05 UTC15m
2026-07-22 N3128T BJC → BJC Jul 22, 17:20 UTCJul 22, 18:05 UTC45m
2026-07-22 N3128T BJC → BJC Jul 22, 13:35 UTCJul 22, 14:00 UTC25m
2026-07-22 N3128T BJC → BJC Jul 22, 00:30 UTCJul 22, 03:20 UTC2h 50m
2026-07-21 N3128T BJC → BJC Jul 21, 16:50 UTCJul 21, 17:05 UTC15m
2026-07-21 N3128T BJC → BJC Jul 21, 01:55 UTCJul 21, 03:25 UTC1h 30m
2026-07-20 N3128T - Jul 20, 18:10 UTCJul 20, 18:50 UTC40m
2026-07-20 N3128T - Jul 20, 17:45 UTCJul 20, 18:05 UTC20m
2026-07-18 N3128T - Jul 18, 17:15 UTCJul 18, 18:05 UTC50m
2026-07-18 N3128T BJC → LAR Jul 18, 14:25 UTCJul 18, 15:10 UTC45m
2026-07-18 N3128T BJC → BJC Jul 18, 03:40 UTCJul 18, 04:25 UTC45m
2026-07-17 N3128T BJC → BJC Jul 17, 00:30 UTCJul 17, 02:10 UTC1h 40m
2026-07-16 N3128T - Jul 16, 16:49 UTCJul 16, 17:25 UTC35m
2026-07-16 N3128T - Jul 16, 16:25 UTCJul 16, 16:35 UTC10m
2026-07-15 N3128T - Jul 15, 17:45 UTCJul 15, 18:30 UTC45m
2026-07-15 N3128T - Jul 15, 17:20 UTCJul 15, 17:40 UTC20m
2026-07-15 N3128T - Jul 15, 17:05 UTCJul 15, 17:15 UTC10m
2026-07-15 N3128T BJC → BJC Jul 15, 14:40 UTCJul 15, 16:00 UTC1h 20m
2026-07-14 N3128T BJC → BJC Jul 14, 16:45 UTCJul 14, 17:50 UTC1h 5m
2026-07-13 N3128T BJC → BJC Jul 13, 19:35 UTCJul 13, 20:55 UTC1h 20m
2026-07-13 N3128T BJC → BJC Jul 13, 17:25 UTCJul 13, 18:30 UTC1h 5m
2026-07-12 N3128T BJC → BJC Jul 12, 17:30 UTCJul 12, 18:45 UTC1h 15m
2026-07-12 N3128T BJC → BJC Jul 12, 14:30 UTCJul 12, 16:15 UTC1h 45m
2026-07-11 N3128T BJC → BJC Jul 11, 22:55 UTCJul 12, 00:10 UTC1h 15m
2026-07-11 N3128T BJC → BJC Jul 11, 19:20 UTCJul 11, 19:55 UTC35m
2026-06-22 N3128T BJC → BJC Jun 22, 20:44 UTCJun 22, 21:35 UTC50m
2026-06-19 N3128T BJC → BJC Jun 19, 03:34 UTCJun 19, 05:24 UTC1h 50m
2026-06-18 N3128T BJC → BJC Jun 18, 18:55 UTCJun 18, 19:20 UTC25m
2026-06-18 N3128T BJC → BJC Jun 18, 01:35 UTCJun 18, 02:05 UTC30m
2026-06-16 N3128T - Jun 16, 20:30 UTCJun 16, 20:40 UTC10m
2026-06-16 N3128T - Jun 16, 20:15 UTCJun 16, 20:25 UTC10m
2026-06-16 N3128T BJC → BJC Jun 16, 20:00 UTCJun 16, 20:05 UTC5m
2026-06-16 N3128T BJC → BJC Jun 16, 14:55 UTCJun 16, 15:45 UTC50m
2026-06-16 N3128T BJC → BJC Jun 16, 13:15 UTCJun 16, 14:00 UTC45m
2026-06-16 N3128T - Jun 16, 04:45 UTCJun 16, 05:00 UTC15m
2026-06-16 N3128T BJC → BJC Jun 16, 04:30 UTCJun 16, 04:39 UTC10m
2026-06-16 N3128T BJC → BJC Jun 16, 04:10 UTCJun 16, 04:25 UTC15m
2026-06-15 N3128T BJC → BJC Jun 15, 18:50 UTCJun 15, 19:25 UTC35m
2026-06-15 N3128T BJC → BJC Jun 15, 16:35 UTCJun 15, 17:34 UTC1h 0m
2026-06-15 N3128T BJC → BJC Jun 15, 12:35 UTCJun 15, 14:10 UTC1h 35m
2026-06-13 N3128T BJC → BJC Jun 13, 15:45 UTCJun 13, 17:10 UTC1h 25m
2026-06-10 N3128T BJC → BJC Jun 10, 14:50 UTCJun 10, 15:45 UTC55m
2026-06-09 N3128T BJC → BJC Jun 9, 16:55 UTCJun 9, 19:05 UTC2h 10m
2026-06-06 N3128T BJC → BJC Jun 6, 18:04 UTCJun 6, 18:59 UTC55m
2026-06-05 N3128T - Jun 5, 23:20 UTCJun 6, 00:05 UTC45m
2026-06-05 N3128T - Jun 5, 19:15 UTCJun 5, 20:10 UTC55m
2026-06-05 N3128T BJC → BJC Jun 5, 14:55 UTCJun 5, 15:50 UTC55m

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 N3128T page for operator, model, and routing details .

Mode-S A351C1 frequently asked

What is Mode-S code A351C1?
A351C1 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N3128T.
Where is Mode-S A351C1 registered?
Mode-S code A351C1 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 A351C1 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 17:45 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A351C1, octal 50650701, decimal 10,703,297.
What flights does A351C1 operate?
Mode-S A351C1 has broadcast 1 distinct callsign, including N3128T.