Apparatus

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sensors Mode-S transponder

ABB3AD

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N853ND · PIPER PA-28-140/150/160/180 · operated by UNIVERSITY OF NORTH DAKOTA, C/O JOHN D ODEGARD SCHOOL OF AEROSPACE SCIENCES

Hex
ABB3AD
Octal
52731655
Decimal
11,252,653
Country
US
Tail
N853ND
Type
P28A
No current signal · last broadcast 8h ago
Flights observed
111
Distinct callsigns
1
Country
US
Last broadcast
8h ago

Last known position

Most recent position reported by Mode-S ABB3AD.

Country allocation

The ICAO 24-bit address ABB3AD 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
NDU53 - 111 2026-07-14

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 NDU53 - Jul 14, 02:50 UTCJul 14, 03:40 UTC50m
2026-07-14 NDU53 - Jul 14, 01:10 UTCJul 14, 01:50 UTC40m
2026-07-11 NDU53 - Jul 11, 20:40 UTCJul 11, 22:01 UTC1h 20m
2026-07-11 NDU53 - Jul 11, 18:10 UTCJul 11, 18:30 UTC20m
2026-07-11 NDU53 - Jul 11, 12:55 UTCJul 11, 13:45 UTC50m
2026-07-11 NDU53 - Jul 11, 01:00 UTCJul 11, 01:15 UTC15m
2026-07-10 NDU53 - Jul 10, 23:20 UTCJul 11, 00:05 UTC45m
2026-07-08 NDU53 - Jul 8, 14:40 UTCJul 8, 14:50 UTC10m
2026-07-08 NDU53 - Jul 8, 13:50 UTCJul 8, 14:10 UTC20m
2026-07-07 NDU53 - Jul 7, 15:05 UTCJul 7, 15:35 UTC30m
2026-07-07 NDU53 - Jul 7, 13:35 UTCJul 7, 14:10 UTC35m
2026-07-06 NDU53 - Jul 6, 16:00 UTCJul 6, 16:45 UTC45m
2026-07-06 NDU53 - Jul 6, 13:55 UTCJul 6, 14:15 UTC20m
2026-07-02 NDU53 - Jul 2, 21:30 UTCJul 2, 21:55 UTC25m
2026-07-01 NDU53 - Jul 1, 15:55 UTCJul 1, 16:25 UTC30m
2026-07-01 NDU53 - Jul 1, 13:15 UTCJul 1, 14:45 UTC1h 30m
2026-06-26 NDU53 - Jun 26, 16:14 UTCJun 26, 17:04 UTC50m
2026-06-26 NDU53 - Jun 26, 13:55 UTCJun 26, 15:05 UTC1h 10m
2026-06-26 NDU53 - Jun 26, 03:24 UTCJun 26, 05:30 UTC2h 5m
2026-06-25 NDU53 - Jun 25, 15:59 UTCJun 25, 16:09 UTC10m
2026-06-12 NDU53 - Jun 12, 14:35 UTCJun 12, 15:00 UTC25m
2026-06-12 NDU53 - Jun 12, 03:10 UTCJun 12, 03:45 UTC35m
2026-06-11 NDU53 - Jun 11, 03:45 UTCJun 11, 05:00 UTC1h 15m
2026-06-11 NDU53 - Jun 11, 01:30 UTCJun 11, 01:45 UTC15m
2026-06-10 NDU53 - Jun 10, 12:45 UTCJun 10, 13:05 UTC20m
2026-06-09 NDU53 - Jun 9, 16:45 UTCJun 9, 16:55 UTC10m
2026-06-09 NDU53 - Jun 9, 14:10 UTCJun 9, 14:35 UTC25m
2026-06-09 NDU53 - Jun 9, 12:55 UTCJun 9, 13:15 UTC20m
2026-06-09 NDU53 - Jun 9, 03:25 UTCJun 9, 03:50 UTC25m
2026-06-08 NDU53 - Jun 8, 17:50 UTCJun 8, 18:20 UTC30m
2026-06-06 NDU53 - Jun 6, 20:55 UTCJun 6, 21:04 UTC10m
2026-06-06 NDU53 - Jun 6, 15:34 UTCJun 6, 16:24 UTC50m
2026-06-06 NDU53 - Jun 6, 02:10 UTCJun 6, 02:30 UTC20m
2026-06-05 NDU53 - Jun 5, 18:55 UTCJun 5, 19:45 UTC50m
2026-06-05 NDU53 - Jun 5, 02:30 UTCJun 5, 03:20 UTC50m
2026-06-04 NDU53 - Jun 4, 19:45 UTCJun 4, 20:30 UTC45m
2026-06-04 NDU53 - Jun 4, 18:10 UTCJun 4, 18:35 UTC25m
2026-06-04 NDU53 - Jun 4, 16:15 UTCJun 4, 16:30 UTC15m
2026-06-04 NDU53 - Jun 4, 14:10 UTCJun 4, 14:20 UTC10m
2026-06-03 NDU53 - Jun 3, 18:50 UTCJun 3, 19:05 UTC15m
2026-05-30 NDU53 - May 30, 20:25 UTCMay 30, 20:50 UTC25m
2026-05-30 NDU53 - May 30, 19:25 UTCMay 30, 19:55 UTC30m
2026-05-29 NDU53 - May 29, 21:35 UTCMay 29, 22:45 UTC1h 10m
2026-05-29 NDU53 GFK → CKN May 29, 12:55 UTCMay 29, 13:45 UTC50m
2026-05-29 NDU53 - May 29, 02:55 UTCMay 29, 03:30 UTC35m
2026-05-28 NDU53 - May 28, 22:40 UTCMay 28, 23:15 UTC35m
2026-05-28 NDU53 - May 28, 20:20 UTCMay 28, 20:55 UTC35m
2026-05-23 NDU53 - May 23, 18:25 UTCMay 23, 19:00 UTC35m
2026-05-23 NDU53 - May 23, 16:50 UTCMay 23, 17:35 UTC45m
2026-05-22 NDU53 - May 22, 16:45 UTCMay 22, 17:15 UTC30m

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 N853ND page for operator, model, and routing details .

Mode-S ABB3AD frequently asked

What is Mode-S code ABB3AD?
ABB3AD is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N853ND.
Where is Mode-S ABB3AD registered?
Mode-S code ABB3AD 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 ABB3AD broadcasting right now?
No active broadcast right now. Last signal was 8h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex ABB3AD, octal 52731655, decimal 11,252,653.
What flights does ABB3AD operate?
Mode-S ABB3AD has broadcast 1 distinct callsign, including NDU53.