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sensors Mode-S transponder

AD4A6E

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N9556K · PIPER PA-28-140/150/160/180 · operated by N R I FLYING CLUB INC

Hex
AD4A6E
Octal
53245156
Decimal
11,356,782
Country
US
Tail
N9556K
Type
P28A
No current signal · last broadcast 1h ago
Flights observed
144
Distinct callsigns
1
Country
US
Last broadcast
1h ago

Last known position

Most recent position reported by Mode-S AD4A6E.

Country allocation

The ICAO 24-bit address AD4A6E 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
N9556K - 144 2026-07-15

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-15 N9556K CCR → CCR Jul 15, 02:40 UTCJul 15, 03:30 UTC50m
2026-07-14 N9556K CCR → CCR Jul 14, 23:55 UTCJul 15, 02:20 UTC2h 25m
2026-07-14 N9556K CCR → CCR Jul 14, 19:05 UTCJul 14, 19:45 UTC40m
2026-07-14 N9556K CCR → CCR Jul 14, 16:35 UTCJul 14, 17:25 UTC50m
2026-07-13 N9556K CCR → CCR Jul 13, 17:35 UTCJul 13, 18:15 UTC40m
2026-07-12 N9556K CCR → CCR Jul 12, 21:50 UTCJul 12, 22:10 UTC20m
2026-07-11 N9556K - Jul 11, 21:05 UTCJul 11, 21:30 UTC25m
2026-07-11 N9556K - Jul 11, 17:55 UTCJul 11, 18:15 UTC20m
2026-07-10 N9556K CCR → CCR Jul 10, 21:10 UTCJul 10, 23:50 UTC2h 40m
2026-07-10 N9556K CCR → CCR Jul 10, 16:55 UTCJul 10, 17:50 UTC55m
2026-07-08 N9556K CCR → CCR Jul 8, 19:20 UTCJul 8, 20:05 UTC45m
2026-07-07 N9556K CCR → CCR Jul 7, 22:35 UTCJul 8, 00:00 UTC1h 25m
2026-07-07 N9556K - Jul 7, 19:00 UTCJul 7, 19:25 UTC25m
2026-07-07 N9556K - Jul 7, 16:30 UTCJul 7, 17:50 UTC1h 20m
2026-07-06 N9556K - Jul 6, 20:20 UTCJul 6, 21:00 UTC40m
2026-07-05 N9556K - Jul 5, 20:10 UTCJul 5, 20:50 UTC40m
2026-07-05 N9556K - Jul 5, 17:35 UTCJul 5, 18:15 UTC40m
2026-07-04 N9556K - Jul 4, 21:15 UTCJul 4, 22:10 UTC55m
2026-07-04 N9556K - Jul 4, 16:35 UTCJul 4, 17:25 UTC50m
2026-07-03 N9556K CCR → CCR Jul 3, 18:05 UTCJul 3, 18:55 UTC50m
2026-07-03 N9556K CCR → CCR Jul 3, 02:25 UTCJul 3, 02:50 UTC25m
2026-07-02 N9556K - Jul 2, 23:05 UTCJul 2, 23:15 UTC10m
2026-07-02 N9556K - Jul 2, 20:40 UTCJul 2, 22:00 UTC1h 20m
2026-07-02 N9556K CCR → LVK Jul 2, 16:05 UTCJul 2, 16:20 UTC15m
2026-07-01 N9556K CCR → CCR Jul 1, 19:25 UTCJul 1, 20:10 UTC45m
2026-07-01 N9556K CCR → CCR Jul 1, 16:30 UTCJul 1, 17:15 UTC45m
2026-06-30 N9556K CCR → CCR Jun 30, 16:40 UTCJun 30, 17:20 UTC40m
2026-06-28 N9556K - Jun 28, 17:50 UTCJun 28, 18:05 UTC15m
2026-06-28 N9556K - Jun 28, 16:29 UTCJun 28, 17:19 UTC50m
2026-06-27 N9556K CCR → CCR Jun 27, 18:15 UTCJun 27, 19:34 UTC1h 20m
2026-06-26 N9556K - Jun 26, 16:24 UTCJun 26, 17:04 UTC40m
2026-06-25 N9556K - Jun 25, 22:20 UTCJun 25, 22:54 UTC35m
2026-06-25 N9556K - Jun 25, 19:29 UTCJun 25, 20:05 UTC35m
2026-06-25 N9556K CCR → CCR Jun 25, 16:29 UTCJun 25, 17:14 UTC45m
2026-06-24 N9556K CCR → CCR Jun 24, 19:15 UTCJun 24, 20:09 UTC55m
2026-06-23 N9556K CCR → CCR Jun 23, 16:35 UTCJun 23, 18:04 UTC1h 30m
2026-06-22 N9556K - Jun 22, 20:49 UTCJun 22, 21:25 UTC35m
2026-06-22 N9556K - Jun 22, 19:29 UTCJun 22, 20:10 UTC40m
2026-06-22 N9556K CCR → CCR Jun 22, 17:25 UTCJun 22, 17:40 UTC15m
2026-06-22 N9556K WVI → CCR Jun 22, 01:29 UTCJun 22, 02:19 UTC50m
2026-06-21 N9556K - Jun 21, 17:39 UTCJun 21, 18:35 UTC55m
2026-06-19 N9556K CCR → CCR Jun 19, 18:54 UTCJun 19, 20:59 UTC2h 5m
2026-06-18 N9556K CCR → CCR Jun 18, 18:40 UTCJun 18, 19:15 UTC35m
2026-06-18 N9556K CCR → CCR Jun 18, 18:25 UTCJun 18, 18:35 UTC10m
2026-06-18 N9556K CCR → CCR Jun 18, 15:40 UTCJun 18, 17:15 UTC1h 35m
2026-06-17 N9556K - Jun 17, 21:20 UTCJun 17, 22:00 UTC40m
2026-06-17 N9556K - Jun 17, 19:20 UTCJun 17, 20:05 UTC45m
2026-06-17 N9556K CCR → CCR Jun 17, 16:05 UTCJun 17, 16:40 UTC35m
2026-06-16 N9556K CCR → CCR Jun 16, 19:05 UTCJun 16, 19:35 UTC30m
2026-06-15 N9556K - Jun 15, 23:30 UTCJun 16, 00:05 UTC35m

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 N9556K page for operator, model, and routing details .

Mode-S AD4A6E frequently asked

What is Mode-S code AD4A6E?
AD4A6E is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N9556K.
Where is Mode-S AD4A6E registered?
Mode-S code AD4A6E 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 AD4A6E 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 AD4A6E, octal 53245156, decimal 11,356,782.
What flights does AD4A6E operate?
Mode-S AD4A6E has broadcast 1 distinct callsign, including N9556K.