Apparatus

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sensors Mode-S transponder

A81EDB

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N622ND · PIPER PA-28-140/150/160/180 · operated by UND AEROSPACE FOUNDATION

Hex
A81EDB
Octal
52017333
Decimal
11,017,947
Country
US
Tail
N622ND
Type
P28A
No current signal · last broadcast 4d ago
Flights observed
195
Distinct callsigns
1
Country
US
Last broadcast
4d ago

Last known position

Most recent position reported by Mode-S A81EDB.

Country allocation

The ICAO 24-bit address A81EDB 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
NDU622 - 195 2026-07-16

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-16 NDU622 - Jul 16, 17:14 UTCJul 16, 18:44 UTC1h 30m
2026-07-16 NDU622 - Jul 16, 15:25 UTCJul 16, 15:49 UTC25m
2026-07-16 NDU622 - Jul 16, 12:34 UTCJul 16, 13:54 UTC1h 20m
2026-07-15 NDU622 - Jul 15, 23:35 UTCJul 16, 00:55 UTC1h 20m
2026-07-15 NDU622 - Jul 15, 15:55 UTCJul 15, 17:20 UTC1h 25m
2026-07-15 NDU622 - Jul 15, 12:50 UTCJul 15, 14:35 UTC1h 45m
2026-07-15 NDU622 - Jul 15, 01:10 UTCJul 15, 02:30 UTC1h 20m
2026-07-14 NDU622 - Jul 14, 16:55 UTCJul 14, 17:50 UTC55m
2026-07-14 NDU622 - Jul 14, 14:15 UTCJul 14, 15:40 UTC1h 25m
2026-07-10 NDU622 - Jul 10, 02:15 UTCJul 10, 02:40 UTC25m
2026-07-09 NDU622 - Jul 9, 16:05 UTCJul 9, 17:20 UTC1h 15m
2026-07-09 NDU622 - Jul 9, 12:35 UTCJul 9, 12:50 UTC15m
2026-07-08 NDU622 - Jul 8, 17:35 UTCJul 8, 17:50 UTC15m
2026-07-08 NDU622 - Jul 8, 16:10 UTCJul 8, 16:45 UTC35m
2026-07-08 NDU622 - Jul 8, 13:00 UTCJul 8, 14:50 UTC1h 50m
2026-07-08 NDU622 - Jul 8, 02:25 UTCJul 8, 03:35 UTC1h 10m
2026-07-07 NDU622 - Jul 7, 15:35 UTCJul 7, 16:55 UTC1h 20m
2026-07-07 NDU622 - Jul 7, 12:55 UTCJul 7, 14:25 UTC1h 30m
2026-07-07 NDU622 - Jul 7, 03:50 UTCJul 7, 05:20 UTC1h 30m
2026-07-06 NDU622 - Jul 6, 15:35 UTCJul 6, 17:05 UTC1h 30m
2026-07-06 NDU622 AZA → AZA Jul 6, 13:05 UTCJul 6, 14:15 UTC1h 10m
2026-07-05 NDU622 - Jul 5, 17:05 UTCJul 5, 18:45 UTC1h 40m
2026-07-05 NDU622 - Jul 5, 14:15 UTCJul 5, 15:45 UTC1h 30m
2026-07-03 NDU622 AZA → AZA Jul 3, 16:10 UTCJul 3, 17:20 UTC1h 10m
2026-07-03 NDU622 - Jul 3, 13:40 UTCJul 3, 15:05 UTC1h 25m
2026-07-03 NDU622 - Jul 3, 02:30 UTCJul 3, 04:15 UTC1h 45m
2026-07-02 NDU622 - Jul 2, 23:25 UTCJul 3, 01:05 UTC1h 40m
2026-07-02 NDU622 - Jul 2, 20:25 UTCJul 2, 22:00 UTC1h 35m
2026-07-02 NDU622 - Jul 2, 18:30 UTCJul 2, 18:55 UTC25m
2026-07-02 NDU622 - Jul 2, 16:10 UTCJul 2, 17:45 UTC1h 35m
2026-07-02 NDU622 - Jul 2, 13:10 UTCJul 2, 14:45 UTC1h 35m
2026-07-02 NDU622 AZA → AZA Jul 2, 02:30 UTCJul 2, 03:30 UTC1h 0m
2026-07-02 NDU622 - Jul 2, 00:05 UTCJul 2, 01:00 UTC55m
2026-07-01 NDU622 - Jul 1, 20:05 UTCJul 1, 21:35 UTC1h 30m
2026-07-01 NDU622 - Jul 1, 18:05 UTCJul 1, 19:15 UTC1h 10m
2026-07-01 NDU622 - Jul 1, 16:25 UTCJul 1, 16:50 UTC25m
2026-07-01 NDU622 AZA → AZA Jul 1, 13:50 UTCJul 1, 14:55 UTC1h 5m
2026-07-01 NDU622 - Jul 1, 02:45 UTCJul 1, 05:15 UTC2h 30m
2026-07-01 NDU622 AZA → AZA Jul 1, 00:45 UTCJul 1, 01:45 UTC1h 0m
2026-06-30 NDU622 AZA → AZA Jun 30, 21:15 UTCJun 30, 23:50 UTC2h 35m
2026-06-30 NDU622 - Jun 30, 17:55 UTCJun 30, 19:20 UTC1h 25m
2026-06-30 NDU622 - Jun 30, 15:10 UTCJun 30, 16:35 UTC1h 25m
2026-06-30 NDU622 - Jun 30, 13:40 UTCJun 30, 14:20 UTC40m
2026-06-28 NDU622 - Jun 28, 15:14 UTCJun 28, 16:39 UTC1h 25m
2026-06-28 NDU622 - Jun 28, 03:40 UTCJun 28, 04:29 UTC50m
2026-06-27 NDU622 - Jun 27, 15:24 UTCJun 27, 16:04 UTC40m
2026-06-26 NDU622 - Jun 26, 16:30 UTCJun 26, 17:40 UTC1h 10m
2026-06-26 NDU622 - Jun 26, 14:50 UTCJun 26, 15:15 UTC25m
2026-06-26 NDU622 - Jun 26, 13:19 UTCJun 26, 13:45 UTC25m
2026-06-25 NDU622 - Jun 25, 16:55 UTCJun 25, 18:15 UTC1h 20m

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 N622ND page for operator, model, and routing details .

Mode-S A81EDB frequently asked

What is Mode-S code A81EDB?
A81EDB is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N622ND.
Where is Mode-S A81EDB registered?
Mode-S code A81EDB 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 A81EDB broadcasting right now?
No active broadcast right now. Last signal was 4d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A81EDB, octal 52017333, decimal 11,017,947.
What flights does A81EDB operate?
Mode-S A81EDB has broadcast 1 distinct callsign, including NDU622.