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sensors Mode-S transponder

AC9516

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N91HW · ROBINSON R-44 Raven · operated by NORTHEAST CUBS LLC

Hex
AC9516
Octal
53112426
Decimal
11,310,358
Country
US
Tail
N91HW
Type
R44
No current signal · last broadcast 14h ago
Flights observed
101
Distinct callsigns
1
Country
US
Last broadcast
14h ago

Last known position

Most recent position reported by Mode-S AC9516.

Country allocation

The ICAO 24-bit address AC9516 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
N91HW - 101 2026-07-13

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-13 N91HW - Jul 13, 16:55 UTCJul 13, 17:35 UTC40m
2026-07-13 N91HW - Jul 13, 14:35 UTCJul 13, 15:00 UTC25m
2026-07-13 N91HW - Jul 13, 00:05 UTCJul 13, 00:45 UTC40m
2026-07-12 N91HW - Jul 12, 19:55 UTCJul 12, 20:30 UTC35m
2026-07-12 N91HW - Jul 12, 18:10 UTCJul 12, 18:35 UTC25m
2026-07-12 N91HW OWD → OWD Jul 12, 00:20 UTCJul 12, 00:35 UTC15m
2026-07-11 N91HW - Jul 11, 22:55 UTCJul 11, 23:15 UTC20m
2026-07-11 N91HW - Jul 11, 19:15 UTCJul 11, 19:45 UTC30m
2026-07-11 N91HW - Jul 11, 18:10 UTCJul 11, 18:30 UTC20m
2026-07-11 N91HW OWD → OWD Jul 11, 17:05 UTCJul 11, 17:40 UTC35m
2026-07-11 N91HW - Jul 11, 12:50 UTCJul 11, 15:45 UTC2h 55m
2026-07-10 N91HW - Jul 10, 23:30 UTCJul 10, 23:50 UTC20m
2026-07-10 N91HW - Jul 10, 18:40 UTCJul 10, 19:00 UTC20m
2026-07-10 N91HW - Jul 10, 17:35 UTCJul 10, 18:10 UTC35m
2026-07-09 N91HW - Jul 9, 15:45 UTCJul 9, 16:40 UTC55m
2026-07-09 N91HW OWD → OWD Jul 9, 13:20 UTCJul 9, 14:00 UTC40m
2026-07-08 N91HW OWD → OWD Jul 8, 16:50 UTCJul 8, 17:25 UTC35m
2026-07-06 N91HW - Jul 6, 20:05 UTCJul 6, 20:20 UTC15m
2026-07-06 N91HW - Jul 6, 16:45 UTCJul 6, 17:15 UTC30m
2026-07-06 N91HW - Jul 6, 01:20 UTCJul 6, 01:40 UTC20m
2026-07-06 N91HW - Jul 6, 00:10 UTCJul 6, 00:40 UTC30m
2026-07-05 N91HW - Jul 5, 23:10 UTCJul 5, 23:35 UTC25m
2026-07-05 N91HW - Jul 5, 22:05 UTCJul 5, 22:30 UTC25m
2026-07-05 N91HW - Jul 5, 16:50 UTCJul 5, 17:30 UTC40m
2026-07-05 N91HW - Jul 5, 02:05 UTCJul 5, 02:45 UTC40m
2026-07-04 N91HW - Jul 4, 21:30 UTCJul 4, 22:00 UTC30m
2026-07-03 N91HW - Jul 3, 15:25 UTCJul 3, 15:50 UTC25m
2026-07-02 N91HW - Jul 2, 12:10 UTCJul 2, 12:35 UTC25m
2026-07-01 N91HW - Jul 1, 23:15 UTCJul 1, 23:35 UTC20m
2026-07-01 N91HW - Jul 1, 15:50 UTCJul 1, 17:25 UTC1h 35m
2026-06-30 N91HW - Jun 30, 14:30 UTCJun 30, 15:55 UTC1h 25m
2026-06-29 N91HW OWD → OWD Jun 29, 22:30 UTCJun 29, 23:29 UTC1h 0m
2026-06-29 N91HW OWD → OWD Jun 29, 18:55 UTCJun 29, 19:05 UTC10m
2026-06-29 N91HW OWD → OWD Jun 29, 17:45 UTCJun 29, 18:05 UTC20m
2026-06-29 N91HW - Jun 29, 16:55 UTCJun 29, 17:14 UTC20m
2026-06-29 N91HW - Jun 29, 15:30 UTCJun 29, 15:49 UTC20m
2026-06-28 N91HW - Jun 28, 22:15 UTCJun 28, 22:29 UTC15m
2026-06-28 N91HW - Jun 28, 20:54 UTCJun 28, 21:14 UTC20m
2026-06-28 N91HW - Jun 28, 17:10 UTCJun 28, 17:39 UTC30m
2026-06-27 N91HW - Jun 27, 20:59 UTCJun 27, 21:40 UTC40m
2026-06-27 N91HW - Jun 27, 18:45 UTCJun 27, 19:24 UTC40m
2026-06-27 N91HW - Jun 27, 15:45 UTCJun 27, 16:39 UTC55m
2026-06-27 N91HW - Jun 27, 14:39 UTCJun 27, 14:49 UTC10m
2026-06-27 N91HW - Jun 27, 12:34 UTCJun 27, 13:35 UTC1h 0m
2026-06-26 N91HW - Jun 26, 23:04 UTCJun 26, 23:30 UTC25m
2026-06-26 N91HW - Jun 26, 18:34 UTCJun 26, 19:14 UTC40m
2026-06-26 N91HW OWD → OWD Jun 26, 16:54 UTCJun 26, 17:40 UTC45m
2026-06-25 N91HW - Jun 25, 21:05 UTCJun 25, 22:10 UTC1h 5m
2026-06-24 N91HW - Jun 24, 22:00 UTCJun 24, 22:45 UTC45m
2026-06-24 N91HW - Jun 24, 19:55 UTCJun 24, 20:49 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 N91HW page for operator, model, and routing details .

Mode-S AC9516 frequently asked

What is Mode-S code AC9516?
AC9516 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N91HW.
Where is Mode-S AC9516 registered?
Mode-S code AC9516 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 AC9516 broadcasting right now?
No active broadcast right now. Last signal was 14h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex AC9516, octal 53112426, decimal 11,310,358.
What flights does AC9516 operate?
Mode-S AC9516 has broadcast 1 distinct callsign, including N91HW.