Apparatus

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sensors Mode-S transponder

AA0C9E

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N747AU · PIPER PA-44 Seminole · operated by AUBURN UNIVERSITY

Hex
AA0C9E
Octal
52406236
Decimal
11,144,350
Country
US
Tail
N747AU
Type
PA44
No current signal · last broadcast 2h ago
Flights observed
188
Distinct callsigns
2
Country
US
Last broadcast
2h ago

Last known position

Most recent position reported by Mode-S AA0C9E.

Country allocation

The ICAO 24-bit address AA0C9E 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 2 distinct

Callsign Airline Flights Last seen
AUB1747 - 136 2026-07-14
N747AU - 52 2026-05-05

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 AUB1747 AUO → AUO Jul 14, 19:10 UTCJul 14, 19:15 UTC5m
2026-07-14 AUB1747 - Jul 14, 18:45 UTCJul 14, 18:55 UTC10m
2026-07-14 AUB1747 AUO → AUO Jul 14, 18:30 UTCJul 14, 18:40 UTC10m
2026-07-13 AUB1747 AUO → AUO Jul 13, 21:20 UTCJul 13, 22:30 UTC1h 10m
2026-07-10 AUB1747 AUO → AUO Jul 10, 11:35 UTCJul 10, 11:55 UTC20m
2026-07-09 AUB1747 AUO → AUO Jul 9, 13:40 UTCJul 9, 15:35 UTC1h 55m
2026-07-09 AUB1747 AUO → AUO Jul 9, 00:25 UTCJul 9, 00:40 UTC15m
2026-07-08 AUB1747 AUO → AUO Jul 8, 22:55 UTCJul 9, 00:05 UTC1h 10m
2026-07-08 AUB1747 AUO → AUO Jul 8, 19:50 UTCJul 8, 20:55 UTC1h 5m
2026-07-08 AUB1747 - Jul 8, 16:45 UTCJul 8, 17:00 UTC15m
2026-07-08 AUB1747 - Jul 8, 15:30 UTCJul 8, 16:05 UTC35m
2026-07-08 AUB1747 AUO → AUO Jul 8, 01:05 UTCJul 8, 01:15 UTC10m
2026-07-07 AUB1747 AUO → AUO Jul 7, 20:45 UTCJul 7, 22:05 UTC1h 20m
2026-07-07 AUB1747 AUO → AUO Jul 7, 18:00 UTCJul 7, 18:05 UTC5m
2026-07-07 AUB1747 AUO → AUO Jul 7, 17:05 UTCJul 7, 17:50 UTC45m
2026-07-07 AUB1747 AUO → AUO Jul 7, 15:00 UTCJul 7, 16:05 UTC1h 5m
2026-07-07 AUB1747 AUO → AUO Jul 7, 14:00 UTCJul 7, 14:05 UTC5m
2026-07-07 AUB1747 AUO → AUO Jul 7, 13:30 UTCJul 7, 13:35 UTC5m
2026-06-29 AUB1747 - Jun 29, 22:00 UTCJun 29, 22:15 UTC15m
2026-06-29 AUB1747 - Jun 29, 20:49 UTCJun 29, 21:14 UTC25m
2026-06-29 AUB1747 - Jun 29, 16:00 UTCJun 29, 16:15 UTC15m
2026-06-29 AUB1747 - Jun 29, 14:34 UTCJun 29, 15:24 UTC50m
2026-06-26 AUB1747 AUO → AUO Jun 26, 20:55 UTCJun 26, 22:14 UTC1h 20m
2026-06-26 AUB1747 AUO → AUO Jun 26, 15:45 UTCJun 26, 16:49 UTC1h 5m
2026-06-26 AUB1747 - Jun 26, 03:00 UTCJun 26, 03:05 UTC5m
2026-06-26 AUB1747 - Jun 26, 02:34 UTCJun 26, 02:40 UTC5m
2026-06-26 AUB1747 AUO → AUO Jun 26, 02:09 UTCJun 26, 02:14 UTC5m
2026-06-25 AUB1747 - Jun 25, 23:09 UTCJun 25, 23:14 UTC5m
2026-06-25 AUB1747 AUO → AUO Jun 25, 21:59 UTCJun 25, 22:59 UTC1h 0m
2026-06-24 AUB1747 AUO → AUO Jun 24, 20:49 UTCJun 24, 22:00 UTC1h 10m
2026-06-24 AUB1747 - Jun 24, 18:25 UTCJun 24, 19:10 UTC45m
2026-06-24 AUB1747 AUO → AUO Jun 24, 15:09 UTCJun 24, 17:14 UTC2h 5m
2026-06-24 AUB1747 AUO → AUO Jun 24, 11:59 UTCJun 24, 13:40 UTC1h 40m
2026-06-24 AUB1747 - Jun 24, 03:00 UTCJun 24, 03:19 UTC20m
2026-06-24 AUB1747 - Jun 24, 01:55 UTCJun 24, 02:20 UTC25m
2026-06-23 AUB1747 - Jun 23, 22:25 UTCJun 23, 22:40 UTC15m
2026-06-23 AUB1747 - Jun 23, 20:49 UTCJun 23, 21:10 UTC20m
2026-06-23 AUB1747 - Jun 23, 18:39 UTCJun 23, 18:45 UTC5m
2026-06-23 AUB1747 - Jun 23, 17:20 UTCJun 23, 18:04 UTC45m
2026-06-23 AUB1747 - Jun 23, 13:50 UTCJun 23, 14:39 UTC50m
2026-06-15 AUB1747 - Jun 15, 16:40 UTCJun 15, 16:59 UTC20m
2026-06-15 AUB1747 - Jun 15, 15:50 UTCJun 15, 16:09 UTC20m
2026-06-13 AUB1747 - Jun 13, 18:45 UTCJun 13, 20:50 UTC2h 5m
2026-06-13 AUB1747 AUO → NEW Jun 13, 14:00 UTCJun 13, 16:20 UTC2h 20m
2026-06-12 AUB1747 - Jun 12, 20:10 UTCJun 12, 20:20 UTC10m
2026-06-12 AUB1747 - Jun 12, 18:45 UTCJun 12, 18:55 UTC10m
2026-06-12 AUB1747 AUO → AUO Jun 12, 13:35 UTCJun 12, 14:50 UTC1h 15m
2026-06-11 AUB1747 AUO → AUO Jun 11, 23:25 UTCJun 12, 00:00 UTC35m
2026-06-11 AUB1747 - Jun 11, 11:55 UTCJun 11, 12:50 UTC55m
2026-06-11 AUB1747 AUO → AUO Jun 11, 11:30 UTCJun 11, 11:35 UTC5m

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 N747AU page for operator, model, and routing details .

Mode-S AA0C9E frequently asked

What is Mode-S code AA0C9E?
AA0C9E is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N747AU.
Where is Mode-S AA0C9E registered?
Mode-S code AA0C9E 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 AA0C9E broadcasting right now?
No active broadcast right now. Last signal was 2h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex AA0C9E, octal 52406236, decimal 11,144,350.
What flights does AA0C9E operate?
Mode-S AA0C9E has broadcast 2 distinct callsigns, including AUB1747, N747AU.