Apparatus

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sensors Mode-S transponder

AC6E76

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N90SU · CESSNA 172 Skyhawk · operated by OHIO STATE UNIVERSITY

Hex
AC6E76
Octal
53067166
Decimal
11,300,470
Country
US
Tail
N90SU
Type
C172
No current signal · last broadcast Jul 26, 14:30 UTC
Flights observed
150
Distinct callsigns
1
Country
US
Last broadcast
Jul 26, 14:30 UTC

Last known position

Most recent position reported by Mode-S AC6E76.

Country allocation

The ICAO 24-bit address AC6E76 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
OSU9 - 150 2026-07-26

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 OSU9 - Jul 26, 13:55 UTCJul 26, 14:30 UTC35m
2026-07-25 OSU9 - Jul 25, 16:50 UTCJul 25, 18:15 UTC1h 25m
2026-07-25 OSU9 - Jul 25, 12:45 UTCJul 25, 14:00 UTC1h 15m
2026-07-25 OSU9 - Jul 25, 00:10 UTCJul 25, 00:25 UTC15m
2026-07-24 OSU9 - Jul 24, 23:10 UTCJul 25, 00:05 UTC55m
2026-07-24 OSU9 - Jul 24, 20:40 UTCJul 24, 21:50 UTC1h 10m
2026-07-24 OSU9 - Jul 24, 18:50 UTCJul 24, 19:55 UTC1h 5m
2026-07-24 OSU9 - Jul 24, 16:35 UTCJul 24, 17:55 UTC1h 20m
2026-07-24 OSU9 - Jul 24, 14:35 UTCJul 24, 15:20 UTC45m
2026-07-24 OSU9 - Jul 24, 12:30 UTCJul 24, 13:25 UTC55m
2026-07-24 OSU9 - Jul 24, 01:40 UTCJul 24, 03:45 UTC2h 5m
2026-07-23 OSU9 - Jul 23, 23:00 UTCJul 24, 00:15 UTC1h 15m
2026-07-23 OSU9 - Jul 23, 21:00 UTCJul 23, 21:40 UTC40m
2026-07-23 OSU9 - Jul 23, 18:35 UTCJul 23, 19:45 UTC1h 10m
2026-07-23 OSU9 - Jul 23, 16:55 UTCJul 23, 17:45 UTC50m
2026-07-23 OSU9 - Jul 23, 01:20 UTCJul 23, 03:15 UTC1h 55m
2026-07-22 OSU9 - Jul 22, 23:05 UTCJul 23, 00:10 UTC1h 5m
2026-07-22 OSU9 - Jul 22, 18:45 UTCJul 22, 19:30 UTC45m
2026-07-20 OSU9 - Jul 20, 23:10 UTCJul 21, 00:00 UTC50m
2026-07-20 OSU9 - Jul 20, 20:55 UTCJul 20, 21:55 UTC1h 0m
2026-07-20 OSU9 - Jul 20, 19:40 UTCJul 20, 19:55 UTC15m
2026-07-20 OSU9 - Jul 20, 16:50 UTCJul 20, 18:00 UTC1h 10m
2026-07-20 OSU9 - Jul 20, 14:15 UTCJul 20, 15:15 UTC1h 0m
2026-07-20 OSU9 - Jul 20, 12:00 UTCJul 20, 13:15 UTC1h 15m
2026-07-16 OSU9 - Jul 16, 20:45 UTCJul 16, 21:35 UTC50m
2026-07-16 OSU9 - Jul 16, 14:35 UTCJul 16, 15:40 UTC1h 5m
2026-07-16 OSU9 - Jul 16, 12:05 UTCJul 16, 13:15 UTC1h 10m
2026-07-16 OSU9 - Jul 16, 02:10 UTCJul 16, 03:40 UTC1h 30m
2026-07-15 OSU9 - Jul 15, 22:45 UTCJul 16, 00:10 UTC1h 25m
2026-07-15 OSU9 - Jul 15, 20:55 UTCJul 15, 21:45 UTC50m
2026-07-15 OSU9 - Jul 15, 18:45 UTCJul 15, 19:50 UTC1h 5m
2026-07-15 OSU9 - Jul 15, 16:10 UTCJul 15, 17:35 UTC1h 25m
2026-07-15 OSU9 - Jul 15, 00:15 UTCJul 15, 01:00 UTC45m
2026-07-09 OSU9 - Jul 9, 17:00 UTCJul 9, 17:50 UTC50m
2026-07-08 OSU9 - Jul 8, 23:15 UTCJul 9, 01:25 UTC2h 10m
2026-07-08 OSU9 - Jul 8, 21:20 UTCJul 8, 22:20 UTC1h 0m
2026-07-08 OSU9 - Jul 8, 19:10 UTCJul 8, 20:15 UTC1h 5m
2026-07-08 OSU9 - Jul 8, 17:05 UTCJul 8, 18:10 UTC1h 5m
2026-07-08 OSU9 - Jul 8, 14:15 UTCJul 8, 15:25 UTC1h 10m
2026-07-07 OSU9 - Jul 7, 20:45 UTCJul 7, 21:50 UTC1h 5m
2026-07-02 OSU9 - Jul 2, 21:20 UTCJul 2, 22:15 UTC55m
2026-07-02 OSU9 - Jul 2, 18:45 UTCJul 2, 20:00 UTC1h 15m
2026-07-02 OSU9 - Jul 2, 17:05 UTCJul 2, 17:50 UTC45m
2026-07-02 OSU9 - Jul 2, 13:35 UTCJul 2, 15:25 UTC1h 50m
2026-07-02 OSU9 - Jul 2, 00:40 UTCJul 2, 01:45 UTC1h 5m
2026-06-30 OSU9 - Jun 30, 23:05 UTCJul 1, 00:00 UTC55m
2026-06-30 OSU9 - Jun 30, 20:50 UTCJun 30, 21:50 UTC1h 0m
2026-06-30 OSU9 - Jun 30, 12:45 UTCJun 30, 13:35 UTC50m
2026-06-30 OSU9 - Jun 30, 03:45 UTCJun 30, 04:20 UTC35m
2026-06-30 OSU9 - Jun 30, 02:55 UTCJun 30, 03:40 UTC45m

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 N90SU page for operator, model, and routing details .

Mode-S AC6E76 frequently asked

What is Mode-S code AC6E76?
AC6E76 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N90SU.
Where is Mode-S AC6E76 registered?
Mode-S code AC6E76 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 AC6E76 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 14:30 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex AC6E76, octal 53067166, decimal 11,300,470.
What flights does AC6E76 operate?
Mode-S AC6E76 has broadcast 1 distinct callsign, including OSU9.