Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

AD9ED6

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N977ND · operated by UND AEROSPACE FOUNDATION

Hex
AD9ED6
Octal
53317326
Decimal
11,378,390
Country
US
Tail
N977ND
Type
P28A
No current signal · last broadcast 4h ago
Flights observed
37
Distinct callsigns
1
Country
US
Last broadcast
4h ago

Last known position

Most recent position reported by Mode-S AD9ED6.

Country allocation

The ICAO 24-bit address AD9ED6 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
NDU77 - 37 2026-06-24

Recent flights last 37

DateFlightRouteTakeoffLandingDuration
2026-06-24 NDU77 - Jun 24, 14:50 UTCJun 24, 15:05 UTC15m
2026-06-24 NDU77 - Jun 24, 10:39 UTCJun 24, 13:20 UTC2h 40m
2026-06-23 NDU77 - Jun 23, 21:24 UTCJun 23, 23:05 UTC1h 40m
2026-06-23 NDU77 - Jun 23, 17:20 UTCJun 23, 19:15 UTC1h 55m
2026-06-23 NDU77 - Jun 23, 14:55 UTCJun 23, 15:34 UTC40m
2026-06-23 NDU77 - Jun 23, 13:19 UTCJun 23, 13:29 UTC10m
2026-06-18 NDU77 - Jun 18, 21:10 UTCJun 18, 21:30 UTC20m
2026-06-18 NDU77 - Jun 18, 19:55 UTCJun 18, 20:25 UTC30m
2026-06-18 NDU77 - Jun 18, 16:40 UTCJun 18, 17:55 UTC1h 15m
2026-06-18 NDU77 - Jun 18, 14:55 UTCJun 18, 15:40 UTC45m
2026-06-18 NDU77 - Jun 18, 13:35 UTCJun 18, 14:15 UTC40m
2026-05-20 NDU77 - May 20, 15:40 UTCMay 20, 15:50 UTC10m
2026-05-20 NDU77 - May 20, 14:15 UTCMay 20, 14:35 UTC20m
2026-05-01 NDU77 - May 1, 20:30 UTCMay 1, 21:15 UTC45m
2026-05-01 NDU77 - May 1, 18:50 UTCMay 1, 19:45 UTC55m
2026-05-01 NDU77 - May 1, 03:05 UTCMay 1, 03:30 UTC25m
2026-04-30 NDU77 - Apr 30, 01:45 UTCApr 30, 02:35 UTC50m
2026-04-29 NDU77 - Apr 29, 22:55 UTCApr 29, 23:15 UTC19m
2026-04-29 NDU77 - Apr 29, 18:20 UTCApr 29, 18:30 UTC10m
2026-04-29 NDU77 - Apr 29, 12:45 UTCApr 29, 13:35 UTC50m
2026-04-29 NDU77 - Apr 29, 01:10 UTCApr 29, 04:05 UTC2h 55m
2026-04-26 NDU77 - Apr 26, 15:45 UTCApr 26, 16:30 UTC45m
2026-04-25 NDU77 - Apr 25, 02:35 UTCApr 25, 03:25 UTC50m
2026-04-24 NDU77 - Apr 24, 22:35 UTCApr 24, 23:15 UTC40m
2026-04-24 NDU77 - Apr 24, 21:10 UTCApr 24, 21:50 UTC40m
2026-04-24 NDU77 - Apr 24, 17:30 UTCApr 24, 17:40 UTC10m
2026-04-23 NDU77 - Apr 23, 18:55 UTCApr 23, 19:10 UTC15m
2026-04-22 NDU77 - Apr 22, 19:35 UTCApr 22, 20:00 UTC25m
2026-04-22 NDU77 - Apr 22, 02:20 UTCApr 22, 03:05 UTC45m
2026-04-21 NDU77 - Apr 21, 23:05 UTCApr 21, 23:50 UTC45m
2026-04-21 NDU77 - Apr 21, 15:45 UTCApr 21, 16:25 UTC40m
2026-04-21 NDU77 - Apr 21, 13:01 UTCApr 21, 13:20 UTC20m
2026-04-21 NDU77 - Apr 21, 02:20 UTCApr 21, 02:35 UTC15m
2026-04-16 NDU77 - Apr 16, 20:00 UTCApr 16, 20:40 UTC40m
2026-04-16 NDU77 - Apr 16, 03:39 UTCApr 16, 04:10 UTC30m
2026-04-16 NDU77 - Apr 16, 00:10 UTCApr 16, 00:45 UTC35m
2026-04-15 NDU77 - Apr 15, 17:05 UTCApr 15, 17:15 UTC10m

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 N977ND page for operator, model, and routing details .

Mode-S AD9ED6 frequently asked

What is Mode-S code AD9ED6?
AD9ED6 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N977ND.
Where is Mode-S AD9ED6 registered?
Mode-S code AD9ED6 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 AD9ED6 broadcasting right now?
No active broadcast right now. Last signal was 4h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex AD9ED6, octal 53317326, decimal 11,378,390.
What flights does AD9ED6 operate?
Mode-S AD9ED6 has broadcast 1 distinct callsign, including NDU77.