Apparatus

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sensors Mode-S transponder

A8115D

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N619ND · PIPER PA-28-140/150/160/180 · operated by UNIVERSITY OF NORTH DAKOTA, JOHN D ODEGARD SCHOOL OF AEROSPACE SCIENCES

Hex
A8115D
Octal
52010535
Decimal
11,014,493
Country
US
Tail
N619ND
Type
P28A
No current signal · last broadcast 8h ago
Flights observed
132
Distinct callsigns
1
Country
US
Last broadcast
8h ago

Last known position

Most recent position reported by Mode-S A8115D.

Country allocation

The ICAO 24-bit address A8115D 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
NDU19 - 132 2026-07-14

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 NDU19 - Jul 14, 00:50 UTCJul 14, 03:00 UTC2h 10m
2026-07-13 NDU19 - Jul 13, 22:40 UTCJul 13, 23:30 UTC50m
2026-07-11 NDU19 - Jul 11, 18:20 UTCJul 11, 19:30 UTC1h 10m
2026-07-11 NDU19 - Jul 11, 16:20 UTCJul 11, 16:50 UTC30m
2026-07-11 NDU19 - Jul 11, 14:35 UTCJul 11, 15:35 UTC1h 0m
2026-07-11 NDU19 - Jul 11, 13:20 UTCJul 11, 13:45 UTC25m
2026-07-10 NDU19 - Jul 10, 14:00 UTCJul 10, 14:55 UTC55m
2026-07-10 NDU19 - Jul 10, 12:20 UTCJul 10, 12:40 UTC20m
2026-07-09 NDU19 - Jul 9, 22:45 UTCJul 9, 23:30 UTC45m
2026-07-09 NDU19 - Jul 9, 20:20 UTCJul 9, 20:35 UTC15m
2026-07-09 NDU19 - Jul 9, 17:00 UTCJul 9, 19:25 UTC2h 25m
2026-07-09 NDU19 - Jul 9, 15:10 UTCJul 9, 15:45 UTC35m
2026-07-09 NDU19 - Jul 9, 13:05 UTCJul 9, 14:25 UTC1h 20m
2026-07-09 NDU19 - Jul 9, 03:25 UTCJul 9, 03:35 UTC10m
2026-07-09 NDU19 - Jul 9, 00:30 UTCJul 9, 01:25 UTC55m
2026-07-08 NDU19 - Jul 8, 20:20 UTCJul 8, 21:00 UTC40m
2026-07-08 NDU19 - Jul 8, 15:20 UTCJul 8, 16:10 UTC50m
2026-07-08 NDU19 - Jul 8, 13:20 UTCJul 8, 13:55 UTC35m
2026-07-08 NDU19 - Jul 8, 01:30 UTCJul 8, 01:40 UTC10m
2026-07-07 NDU19 - Jul 7, 13:30 UTCJul 7, 14:05 UTC35m
2026-07-07 NDU19 - Jul 7, 02:10 UTCJul 7, 02:25 UTC15m
2026-07-06 NDU19 - Jul 6, 23:30 UTCJul 6, 23:40 UTC10m
2026-07-02 NDU19 - Jul 2, 19:20 UTCJul 2, 20:30 UTC1h 10m
2026-07-02 NDU19 - Jul 2, 14:15 UTCJul 2, 14:50 UTC35m
2026-07-02 NDU19 - Jul 2, 03:45 UTCJul 2, 05:25 UTC1h 40m
2026-07-02 NDU19 - Jul 2, 00:50 UTCJul 2, 01:05 UTC15m
2026-07-01 NDU19 - Jul 1, 23:05 UTCJul 1, 23:15 UTC10m
2026-07-01 NDU19 - Jul 1, 17:05 UTCJul 1, 17:35 UTC30m
2026-07-01 NDU19 - Jul 1, 13:25 UTCJul 1, 14:10 UTC45m
2026-06-26 NDU19 - Jun 26, 21:15 UTCJun 26, 22:05 UTC50m
2026-06-26 NDU19 - Jun 26, 16:44 UTCJun 26, 17:40 UTC55m
2026-06-26 NDU19 - Jun 26, 04:10 UTCJun 26, 04:24 UTC15m
2026-06-26 NDU19 - Jun 26, 00:45 UTCJun 26, 01:39 UTC55m
2026-06-25 NDU19 - Jun 25, 20:49 UTCJun 25, 21:25 UTC35m
2026-06-25 NDU19 - Jun 25, 03:40 UTCJun 25, 05:44 UTC2h 5m
2026-06-24 NDU19 - Jun 24, 03:50 UTCJun 24, 05:09 UTC1h 20m
2026-06-24 NDU19 - Jun 24, 00:05 UTCJun 24, 00:30 UTC25m
2026-06-23 NDU19 - Jun 23, 01:59 UTCJun 23, 02:55 UTC55m
2026-06-22 NDU19 - Jun 22, 23:14 UTCJun 22, 23:50 UTC35m
2026-06-22 NDU19 - Jun 22, 21:25 UTCJun 22, 22:10 UTC45m
2026-06-19 NDU19 - Jun 19, 23:39 UTCJun 20, 00:34 UTC55m
2026-06-19 NDU19 - Jun 19, 15:14 UTCJun 19, 16:25 UTC1h 10m
2026-06-19 NDU19 - Jun 19, 04:04 UTCJun 19, 05:54 UTC1h 50m
2026-06-19 NDU19 - Jun 19, 01:59 UTCJun 19, 02:39 UTC40m
2026-06-19 NDU19 - Jun 19, 00:05 UTCJun 19, 01:04 UTC59m
2026-06-18 NDU19 - Jun 18, 21:50 UTCJun 18, 23:00 UTC1h 10m
2026-06-18 NDU19 - Jun 18, 18:00 UTCJun 18, 18:40 UTC40m
2026-06-18 NDU19 - Jun 18, 03:25 UTCJun 18, 04:00 UTC35m
2026-06-17 NDU19 - Jun 17, 17:35 UTCJun 17, 18:40 UTC1h 5m
2026-06-17 NDU19 - Jun 17, 16:20 UTCJun 17, 17:00 UTC40m

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 N619ND page for operator, model, and routing details .

Mode-S A8115D frequently asked

What is Mode-S code A8115D?
A8115D is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N619ND.
Where is Mode-S A8115D registered?
Mode-S code A8115D 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 A8115D 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 A8115D, octal 52010535, decimal 11,014,493.
What flights does A8115D operate?
Mode-S A8115D has broadcast 1 distinct callsign, including NDU19.