Apparatus

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sensors Mode-S transponder

A8FAA0

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N678ND · CESSNA 172 Skyhawk · operated by UND AEROSPACE FOUNDATION

Hex
A8FAA0
Octal
52175240
Decimal
11,074,208
Country
US
Tail
N678ND
Type
C172
No current signal · last broadcast Jul 25, 17:20 UTC
Flights observed
99
Distinct callsigns
1
Country
US
Last broadcast
Jul 25, 17:20 UTC

Last known position

Most recent position reported by Mode-S A8FAA0.

Country allocation

The ICAO 24-bit address A8FAA0 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
NDU678 - 99 2026-07-25

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-25 NDU678 - Jul 25, 16:30 UTCJul 25, 17:20 UTC50m
2026-07-25 NDU678 - Jul 25, 14:40 UTCJul 25, 15:35 UTC55m
2026-07-24 NDU678 - Jul 24, 13:20 UTCJul 24, 14:05 UTC45m
2026-07-23 NDU678 AZA → AZA Jul 23, 16:00 UTCJul 23, 16:55 UTC55m
2026-07-23 NDU678 - Jul 23, 13:50 UTCJul 23, 14:55 UTC1h 5m
2026-07-22 NDU678 - Jul 22, 18:35 UTCJul 22, 19:25 UTC50m
2026-07-22 NDU678 - Jul 22, 14:30 UTCJul 22, 15:25 UTC55m
2026-07-21 NDU678 AZA → AZA Jul 21, 15:45 UTCJul 21, 16:55 UTC1h 10m
2026-07-20 NDU678 - Jul 20, 15:15 UTCJul 20, 16:05 UTC50m
2026-07-15 NDU678 AZA → AZA Jul 15, 20:10 UTCJul 15, 21:05 UTC55m
2026-07-15 NDU678 - Jul 15, 18:05 UTCJul 15, 19:00 UTC55m
2026-07-15 NDU678 - Jul 15, 15:35 UTCJul 15, 16:50 UTC1h 15m
2026-07-15 NDU678 - Jul 15, 14:05 UTCJul 15, 14:50 UTC45m
2026-07-14 NDU678 - Jul 14, 19:45 UTCJul 14, 20:35 UTC50m
2026-07-13 NDU678 - Jul 13, 14:20 UTCJul 13, 15:10 UTC50m
2026-07-07 NDU678 AZA → AZA Jul 7, 18:15 UTCJul 7, 19:05 UTC50m
2026-07-07 NDU678 - Jul 7, 15:25 UTCJul 7, 16:15 UTC50m
2026-07-06 NDU678 - Jul 6, 16:55 UTCJul 6, 17:55 UTC1h 0m
2026-07-03 NDU678 - Jul 3, 13:15 UTCJul 3, 14:10 UTC55m
2026-07-02 NDU678 - Jul 2, 17:40 UTCJul 2, 18:35 UTC55m
2026-07-02 NDU678 - Jul 2, 15:50 UTCJul 2, 16:40 UTC50m
2026-07-02 NDU678 - Jul 2, 13:25 UTCJul 2, 14:20 UTC55m
2026-07-01 NDU678 - Jul 1, 19:50 UTCJul 1, 20:40 UTC50m
2026-07-01 NDU678 AZA → AZA Jul 1, 15:15 UTCJul 1, 16:10 UTC55m
2026-06-30 NDU678 AZA → AZA Jun 30, 15:10 UTCJun 30, 16:00 UTC50m
2026-06-29 NDU678 - Jun 29, 15:14 UTCJun 29, 16:15 UTC1h 0m
2026-06-28 NDU678 - Jun 28, 16:09 UTCJun 28, 17:00 UTC50m
2026-06-27 NDU678 - Jun 27, 16:24 UTCJun 27, 17:20 UTC55m
2026-06-26 NDU678 - Jun 26, 15:25 UTCJun 26, 16:09 UTC45m
2026-06-25 NDU678 - Jun 25, 20:45 UTCJun 25, 21:40 UTC55m
2026-06-25 NDU678 - Jun 25, 18:24 UTCJun 25, 19:29 UTC1h 5m
2026-06-25 NDU678 - Jun 25, 15:40 UTCJun 25, 16:35 UTC55m
2026-06-25 NDU678 - Jun 25, 12:44 UTCJun 25, 13:35 UTC50m
2026-06-23 NDU678 - Jun 23, 16:54 UTCJun 23, 17:50 UTC55m
2026-06-19 NDU678 - Jun 19, 15:59 UTCJun 19, 16:55 UTC55m
2026-06-18 NDU678 - Jun 18, 18:45 UTCJun 18, 19:45 UTC1h 0m
2026-06-18 NDU678 - Jun 18, 16:15 UTCJun 18, 17:25 UTC1h 10m
2026-06-17 NDU678 - Jun 17, 19:10 UTCJun 17, 20:05 UTC55m
2026-06-16 NDU678 - Jun 16, 18:45 UTCJun 16, 19:35 UTC50m
2026-06-16 NDU678 - Jun 16, 14:55 UTCJun 16, 15:50 UTC55m
2026-06-15 NDU678 - Jun 15, 18:15 UTCJun 15, 19:05 UTC50m
2026-06-12 NDU678 - Jun 12, 19:15 UTCJun 12, 19:55 UTC40m
2026-06-12 NDU678 - Jun 12, 17:10 UTCJun 12, 18:10 UTC1h 0m
2026-06-12 NDU678 - Jun 12, 14:55 UTCJun 12, 15:55 UTC1h 0m
2026-06-11 NDU678 - Jun 11, 20:20 UTCJun 11, 21:10 UTC50m
2026-06-10 NDU678 - Jun 10, 18:55 UTCJun 10, 19:15 UTC20m
2026-06-10 NDU678 - Jun 10, 18:15 UTCJun 10, 18:50 UTC35m
2026-06-06 NDU678 - Jun 6, 18:45 UTCJun 6, 19:44 UTC1h 0m
2026-06-04 NDU678 - Jun 4, 18:05 UTCJun 4, 19:10 UTC1h 5m
2026-06-04 NDU678 AZA → AZA Jun 4, 16:00 UTCJun 4, 16:55 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 N678ND page for operator, model, and routing details .

Mode-S A8FAA0 frequently asked

What is Mode-S code A8FAA0?
A8FAA0 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N678ND.
Where is Mode-S A8FAA0 registered?
Mode-S code A8FAA0 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 A8FAA0 broadcasting right now?
No active broadcast right now. Last signal was Jul 25, 17:20 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A8FAA0, octal 52175240, decimal 11,074,208.
What flights does A8FAA0 operate?
Mode-S A8FAA0 has broadcast 1 distinct callsign, including NDU678.