Apparatus

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sensors Mode-S transponder

ACD3EA

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N9256C · PIPER PA-28-140/150/160/180 · operated by BLUEGRASS AVIATION LLC

Hex
ACD3EA
Octal
53151752
Decimal
11,326,442
Country
US
Tail
N9256C
Type
P28A
No current signal · last broadcast Jul 25, 01:50 UTC
Flights observed
208
Distinct callsigns
1
Country
US
Last broadcast
Jul 25, 01:50 UTC

Last known position

Most recent position reported by Mode-S ACD3EA.

Country allocation

The ICAO 24-bit address ACD3EA 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
N9256C - 208 2026-07-25

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-25 N9256C - Jul 25, 00:55 UTCJul 25, 01:50 UTC55m
2026-07-24 N9256C - Jul 24, 22:15 UTCJul 24, 23:05 UTC50m
2026-07-24 N9256C - Jul 24, 13:10 UTCJul 24, 14:25 UTC1h 15m
2026-07-24 N9256C CKV → CKV Jul 24, 02:00 UTCJul 24, 02:45 UTC45m
2026-07-23 N9256C CKV → CKV Jul 23, 16:35 UTCJul 23, 17:45 UTC1h 10m
2026-07-23 N9256C - Jul 23, 15:05 UTCJul 23, 15:50 UTC45m
2026-07-22 N9256C CKV → CKV Jul 22, 13:45 UTCJul 22, 14:35 UTC50m
2026-07-22 N9256C CKV → CKV Jul 22, 11:55 UTCJul 22, 13:00 UTC1h 5m
2026-07-21 N9256C CKV → CKV Jul 21, 12:50 UTCJul 21, 13:15 UTC25m
2026-07-21 N9256C CKV → CKV Jul 21, 11:10 UTCJul 21, 11:45 UTC35m
2026-07-19 N9256C CKV → CKV Jul 19, 15:00 UTCJul 19, 16:05 UTC1h 5m
2026-07-19 N9256C - Jul 19, 11:45 UTCJul 19, 13:30 UTC1h 45m
2026-07-18 N9256C - Jul 18, 18:05 UTCJul 18, 18:40 UTC35m
2026-07-18 N9256C - Jul 18, 12:50 UTCJul 18, 13:35 UTC45m
2026-07-17 N9256C CKV → CKV Jul 17, 17:55 UTCJul 17, 18:19 UTC25m
2026-07-17 N9256C CKV → CKV Jul 17, 14:44 UTCJul 17, 15:49 UTC1h 5m
2026-07-08 N9256C CKV → CKV Jul 8, 18:55 UTCJul 8, 19:50 UTC55m
2026-07-07 N9256C CKV → CKV Jul 7, 23:50 UTCJul 8, 00:30 UTC40m
2026-07-07 N9256C CKV → CKV Jul 7, 19:15 UTCJul 7, 20:25 UTC1h 10m
2026-07-02 N9256C - Jul 2, 11:20 UTCJul 2, 12:30 UTC1h 10m
2026-07-01 N9256C - Jul 1, 14:15 UTCJul 1, 15:00 UTC45m
2026-07-01 N9256C - Jul 1, 12:15 UTCJul 1, 12:50 UTC35m
2026-06-30 N9256C - Jun 30, 23:55 UTCJul 1, 00:55 UTC1h 0m
2026-06-30 N9256C - Jun 30, 14:50 UTCJun 30, 15:40 UTC50m
2026-06-30 N9256C CKV → CKV Jun 30, 11:45 UTCJun 30, 12:45 UTC1h 0m
2026-06-29 N9256C - Jun 29, 16:55 UTCJun 29, 17:59 UTC1h 5m
2026-06-29 N9256C - Jun 29, 11:55 UTCJun 29, 13:14 UTC1h 20m
2026-06-28 N9256C CKV → CKV Jun 28, 12:55 UTCJun 28, 13:25 UTC30m
2026-06-26 N9256C - Jun 26, 00:05 UTCJun 26, 00:59 UTC55m
2026-06-25 N9256C CKV → CKV Jun 25, 17:49 UTCJun 25, 18:55 UTC1h 5m
2026-06-25 N9256C CKV → CKV Jun 25, 12:50 UTCJun 25, 13:55 UTC1h 5m
2026-06-25 N9256C - Jun 25, 10:45 UTCJun 25, 12:10 UTC1h 25m
2026-06-25 N9256C - Jun 25, 00:14 UTCJun 25, 00:59 UTC45m
2026-06-24 N9256C - Jun 24, 15:00 UTCJun 24, 15:54 UTC55m
2026-06-24 N9256C - Jun 24, 03:15 UTCJun 24, 04:39 UTC1h 25m
2026-06-24 N9256C - Jun 24, 02:09 UTCJun 24, 02:45 UTC35m
2026-06-24 N9256C CKV → CKV Jun 24, 00:05 UTCJun 24, 01:04 UTC1h 0m
2026-06-23 N9256C - Jun 23, 18:34 UTCJun 23, 19:19 UTC45m
2026-06-23 N9256C - Jun 23, 17:50 UTCJun 23, 17:59 UTC10m
2026-06-23 N9256C - Jun 23, 16:14 UTCJun 23, 16:59 UTC45m
2026-06-23 N9256C CKV → CKV Jun 23, 14:44 UTCJun 23, 15:40 UTC55m
2026-06-23 N9256C - Jun 23, 13:00 UTCJun 23, 13:59 UTC1h 0m
2026-06-21 N9256C - Jun 21, 15:40 UTCJun 21, 16:10 UTC30m
2026-06-21 N9256C - Jun 21, 14:19 UTCJun 21, 14:34 UTC15m
2026-06-21 N9256C - Jun 21, 13:00 UTCJun 21, 13:20 UTC20m
2026-06-20 N9256C - Jun 20, 21:19 UTCJun 20, 21:55 UTC35m
2026-06-20 N9256C - Jun 20, 20:00 UTCJun 20, 20:29 UTC30m
2026-06-20 N9256C - Jun 20, 17:39 UTCJun 20, 18:40 UTC1h 0m
2026-06-20 N9256C CKV → CKV Jun 20, 14:50 UTCJun 20, 15:39 UTC50m
2026-06-20 N9256C CKV → CKV Jun 20, 12:50 UTCJun 20, 13:44 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 N9256C page for operator, model, and routing details .

Mode-S ACD3EA frequently asked

What is Mode-S code ACD3EA?
ACD3EA is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N9256C.
Where is Mode-S ACD3EA registered?
Mode-S code ACD3EA 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 ACD3EA broadcasting right now?
No active broadcast right now. Last signal was Jul 25, 01:50 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex ACD3EA, octal 53151752, decimal 11,326,442.
What flights does ACD3EA operate?
Mode-S ACD3EA has broadcast 1 distinct callsign, including N9256C.