Apparatus

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sensors Mode-S transponder

AA5194

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N764ND · PIPER PA-28-140/150/160/180 · operated by UNIVERSITY OF NORTH DAKOTA, C/O JOHN D ODEGARD SCHOOL OF AEROSPACE SCIENCES

Hex
AA5194
Octal
52450624
Decimal
11,162,004
Country
US
Tail
N764ND
Type
P28A
No current signal · last broadcast Jul 25, 21:15 UTC
Flights observed
168
Distinct callsigns
2
Country
US
Last broadcast
Jul 25, 21:15 UTC

Last known position

Most recent position reported by Mode-S AA5194.

Country allocation

The ICAO 24-bit address AA5194 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
NDU64M - 137 2026-07-25
NDU64 - 29 2026-05-11

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-25 NDU64M - Jul 25, 20:20 UTCJul 25, 21:15 UTC55m
2026-07-25 NDU64M - Jul 25, 19:05 UTCJul 25, 19:40 UTC35m
2026-07-25 NDU64M - Jul 25, 15:45 UTCJul 25, 17:10 UTC1h 25m
2026-07-24 NDU64M - Jul 24, 14:55 UTCJul 24, 15:45 UTC50m
2026-07-23 NDU64M - Jul 23, 22:45 UTCJul 24, 00:35 UTC1h 50m
2026-07-23 NDU64M - Jul 23, 18:05 UTCJul 23, 19:00 UTC55m
2026-07-23 NDU64M - Jul 23, 01:30 UTCJul 23, 02:05 UTC35m
2026-07-22 NDU64M - Jul 22, 23:05 UTCJul 22, 23:20 UTC15m
2026-07-22 NDU64M - Jul 22, 22:00 UTCJul 22, 22:10 UTC10m
2026-07-22 NDU64M - Jul 22, 17:30 UTCJul 22, 18:15 UTC45m
2026-07-22 NDU64M - Jul 22, 14:55 UTCJul 22, 15:20 UTC25m
2026-07-22 NDU64M - Jul 22, 12:40 UTCJul 22, 13:10 UTC30m
2026-07-21 NDU64M - Jul 21, 21:50 UTCJul 21, 22:05 UTC15m
2026-07-21 NDU64M - Jul 21, 17:55 UTCJul 21, 18:20 UTC25m
2026-07-21 NDU64M - Jul 21, 12:40 UTCJul 21, 13:25 UTC45m
2026-07-20 NDU64M GFK → GFK Jul 20, 12:15 UTCJul 20, 13:10 UTC55m
2026-07-18 - - Jul 18, 19:05 UTCJul 18, 19:15 UTC10m
2026-07-18 NDU64M - Jul 18, 16:45 UTCJul 18, 17:50 UTC1h 5m
2026-07-18 NDU64M - Jul 18, 13:20 UTCJul 18, 13:55 UTC35m
2026-07-17 NDU64M - Jul 17, 22:25 UTCJul 17, 23:35 UTC1h 10m
2026-07-17 NDU64M - Jul 17, 20:20 UTCJul 17, 21:15 UTC55m
2026-07-17 NDU64M - Jul 17, 18:15 UTCJul 17, 19:15 UTC1h 0m
2026-07-17 NDU64M - Jul 17, 02:10 UTCJul 17, 02:59 UTC50m
2026-07-16 NDU64M - Jul 16, 23:49 UTCJul 17, 00:30 UTC40m
2026-07-16 NDU64M - Jul 16, 18:29 UTCJul 16, 18:44 UTC15m
2026-07-16 NDU64M - Jul 16, 14:45 UTCJul 16, 15:10 UTC25m
2026-07-11 NDU64M - Jul 11, 18:30 UTCJul 11, 19:55 UTC1h 25m
2026-07-11 NDU64M - Jul 11, 16:20 UTCJul 11, 16:50 UTC30m
2026-07-11 NDU64M - Jul 11, 14:15 UTCJul 11, 15:30 UTC1h 15m
2026-07-10 NDU64M - Jul 10, 14:00 UTCJul 10, 15:15 UTC1h 15m
2026-07-10 NDU64M - Jul 10, 12:25 UTCJul 10, 12:55 UTC30m
2026-07-10 NDU64M - Jul 10, 03:00 UTCJul 10, 03:50 UTC50m
2026-07-10 NDU64M - Jul 10, 00:00 UTCJul 10, 00:20 UTC20m
2026-07-09 NDU64M - Jul 9, 19:45 UTCJul 9, 20:00 UTC15m
2026-07-09 NDU64M - Jul 9, 14:15 UTCJul 9, 14:45 UTC30m
2026-07-09 NDU64M GFK → GFK Jul 9, 12:25 UTCJul 9, 13:30 UTC1h 5m
2026-07-09 NDU64M - Jul 9, 05:35 UTCJul 9, 05:55 UTC20m
2026-07-09 NDU64M - Jul 9, 03:45 UTCJul 9, 04:00 UTC15m
2026-07-08 NDU64M - Jul 8, 23:30 UTCJul 8, 23:55 UTC25m
2026-07-08 NDU64M - Jul 8, 12:25 UTCJul 8, 13:25 UTC1h 0m
2026-07-08 NDU64M GFK → GFK Jul 8, 04:05 UTCJul 8, 04:15 UTC10m
2026-07-08 NDU64M - Jul 8, 00:30 UTCJul 8, 00:45 UTC15m
2026-07-07 NDU64M - Jul 7, 21:25 UTCJul 7, 22:55 UTC1h 30m
2026-07-07 NDU64M - Jul 7, 16:40 UTCJul 7, 17:05 UTC25m
2026-07-07 NDU64M - Jul 7, 15:00 UTCJul 7, 15:45 UTC45m
2026-07-07 NDU64M - Jul 7, 12:30 UTCJul 7, 13:45 UTC1h 15m
2026-07-07 NDU64M - Jul 7, 00:15 UTCJul 7, 00:40 UTC25m
2026-07-06 NDU64M - Jul 6, 21:55 UTCJul 6, 22:50 UTC55m
2026-07-06 NDU64M - Jul 6, 13:20 UTCJul 6, 13:45 UTC25m
2026-07-02 NDU64M - Jul 2, 17:55 UTCJul 2, 18:10 UTC15m

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 N764ND page for operator, model, and routing details .

Mode-S AA5194 frequently asked

What is Mode-S code AA5194?
AA5194 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N764ND.
Where is Mode-S AA5194 registered?
Mode-S code AA5194 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 AA5194 broadcasting right now?
No active broadcast right now. Last signal was Jul 25, 21:15 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex AA5194, octal 52450624, decimal 11,162,004.
What flights does AA5194 operate?
Mode-S AA5194 has broadcast 2 distinct callsigns, including NDU64M, NDU64.