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sensors Mode-S transponder

ACD3C7

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N9255C · PIPER PA-28-140/150/160/180 · operated by D&J AVIATION LLC

Hex
ACD3C7
Octal
53151707
Decimal
11,326,407
Country
US
Tail
N9255C
Type
P28A
No current signal · last broadcast Jul 25, 14:40 UTC
Flights observed
169
Distinct callsigns
1
Country
US
Last broadcast
Jul 25, 14:40 UTC

Last known position

Most recent position reported by Mode-S ACD3C7.

Country allocation

The ICAO 24-bit address ACD3C7 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
N9255C - 169 2026-07-25

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-25 N9255C - Jul 25, 13:35 UTCJul 25, 14:40 UTC1h 5m
2026-07-25 N9255C - Jul 25, 11:40 UTCJul 25, 13:00 UTC1h 20m
2026-07-24 N9255C - Jul 24, 14:30 UTCJul 24, 15:20 UTC50m
2026-07-23 N9255C - Jul 23, 19:05 UTCJul 23, 20:15 UTC1h 10m
2026-07-23 N9255C - Jul 23, 15:30 UTCJul 23, 16:35 UTC1h 5m
2026-07-23 N9255C - Jul 23, 13:25 UTCJul 23, 14:45 UTC1h 20m
2026-07-23 N9255C - Jul 23, 11:45 UTCJul 23, 12:50 UTC1h 5m
2026-07-22 N9255C - Jul 22, 15:00 UTCJul 22, 15:50 UTC50m
2026-07-22 N9255C - Jul 22, 13:40 UTCJul 22, 14:25 UTC45m
2026-07-21 N9255C - Jul 21, 16:40 UTCJul 21, 17:40 UTC1h 0m
2026-07-21 N9255C - Jul 21, 14:25 UTCJul 21, 15:55 UTC1h 30m
2026-07-21 N9255C - Jul 21, 12:45 UTCJul 21, 13:45 UTC1h 0m
2026-07-20 N9255C - Jul 20, 19:30 UTCJul 20, 21:35 UTC2h 5m
2026-07-20 N9255C - Jul 20, 13:45 UTCJul 20, 14:30 UTC45m
2026-07-20 N9255C - Jul 20, 11:30 UTCJul 20, 12:55 UTC1h 25m
2026-07-19 N9255C - Jul 19, 12:30 UTCJul 19, 14:15 UTC1h 45m
2026-07-18 N9255C - Jul 18, 16:05 UTCJul 18, 16:50 UTC45m
2026-07-18 N9255C - Jul 18, 13:50 UTCJul 18, 14:55 UTC1h 5m
2026-07-17 N9255C - Jul 17, 14:04 UTCJul 17, 15:35 UTC1h 30m
2026-07-16 N9255C - Jul 16, 15:19 UTCJul 16, 16:55 UTC1h 35m
2026-07-15 N9255C - Jul 15, 15:25 UTCJul 15, 17:15 UTC1h 50m
2026-07-15 N9255C - Jul 15, 12:30 UTCJul 15, 13:50 UTC1h 20m
2026-07-14 N9255C - Jul 14, 21:20 UTCJul 14, 22:00 UTC40m
2026-07-14 N9255C - Jul 14, 16:35 UTCJul 14, 18:25 UTC1h 50m
2026-07-14 N9255C - Jul 14, 14:30 UTCJul 14, 15:50 UTC1h 20m
2026-07-14 N9255C - Jul 14, 12:45 UTCJul 14, 13:50 UTC1h 5m
2026-07-13 N9255C - Jul 13, 16:25 UTCJul 13, 17:45 UTC1h 20m
2026-07-11 N9255C - Jul 11, 19:50 UTCJul 11, 20:30 UTC40m
2026-07-11 N9255C - Jul 11, 17:30 UTCJul 11, 18:50 UTC1h 20m
2026-07-10 N9255C - Jul 10, 16:50 UTCJul 10, 18:00 UTC1h 10m
2026-07-10 N9255C - Jul 10, 14:40 UTCJul 10, 15:55 UTC1h 15m
2026-07-10 N9255C - Jul 10, 11:40 UTCJul 10, 12:50 UTC1h 10m
2026-07-10 N9255C - Jul 10, 00:30 UTCJul 10, 01:20 UTC50m
2026-07-09 N9255C - Jul 9, 15:40 UTCJul 9, 16:55 UTC1h 15m
2026-07-09 N9255C - Jul 9, 13:30 UTCJul 9, 14:50 UTC1h 20m
2026-07-09 N9255C - Jul 9, 11:30 UTCJul 9, 12:45 UTC1h 15m
2026-07-08 N9255C - Jul 8, 13:40 UTCJul 8, 15:05 UTC1h 25m
2026-07-08 N9255C - Jul 8, 00:30 UTCJul 8, 02:00 UTC1h 30m
2026-07-07 N9255C - Jul 7, 13:45 UTCJul 7, 14:50 UTC1h 5m
2026-07-07 N9255C - Jul 7, 11:30 UTCJul 7, 12:35 UTC1h 5m
2026-07-06 N9255C - Jul 6, 14:35 UTCJul 6, 15:40 UTC1h 5m
2026-07-06 N9255C - Jul 6, 11:50 UTCJul 6, 13:30 UTC1h 40m
2026-07-04 N9255C - Jul 4, 13:40 UTCJul 4, 14:50 UTC1h 10m
2026-06-30 N9255C - Jun 30, 13:15 UTCJun 30, 14:45 UTC1h 30m
2026-06-29 N9255C - Jun 29, 16:00 UTCJun 29, 17:10 UTC1h 10m
2026-06-28 N9255C - Jun 28, 22:45 UTCJun 29, 00:24 UTC1h 40m
2026-06-28 N9255C - Jun 28, 18:55 UTCJun 28, 20:34 UTC1h 40m
2026-06-28 N9255C - Jun 28, 16:35 UTCJun 28, 17:55 UTC1h 20m
2026-06-28 N9255C - Jun 28, 13:34 UTCJun 28, 15:05 UTC1h 30m
2026-06-28 N9255C - Jun 28, 10:50 UTCJun 28, 12:15 UTC1h 25m

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 N9255C page for operator, model, and routing details .

Mode-S ACD3C7 frequently asked

What is Mode-S code ACD3C7?
ACD3C7 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N9255C.
Where is Mode-S ACD3C7 registered?
Mode-S code ACD3C7 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 ACD3C7 broadcasting right now?
No active broadcast right now. Last signal was Jul 25, 14:40 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex ACD3C7, octal 53151707, decimal 11,326,407.
What flights does ACD3C7 operate?
Mode-S ACD3C7 has broadcast 1 distinct callsign, including N9255C.