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sensors Mode-S transponder

A3DFED

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N349ND · operated by UND AEROSPACE FOUNDATION

Hex
A3DFED
Octal
50757755
Decimal
10,739,693
Country
US
Tail
N349ND
Type
P28A
No current signal · last broadcast 19d ago
Flights observed
270
Distinct callsigns
1
Country
US
Last broadcast
19d ago

Last known position

Most recent position reported by Mode-S A3DFED.

Country allocation

The ICAO 24-bit address A3DFED 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
NDU349 - 270 2026-07-25

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-25 NDU349 - Jul 25, 19:20 UTCJul 25, 20:05 UTC45m
2026-07-25 NDU349 AZA → AZA Jul 25, 14:50 UTCJul 25, 16:10 UTC1h 20m
2026-07-22 NDU349 - Jul 22, 17:35 UTCJul 22, 19:20 UTC1h 45m
2026-07-22 NDU349 AZA → AZA Jul 22, 14:50 UTCJul 22, 16:35 UTC1h 45m
2026-07-22 NDU349 AZA → AZA Jul 22, 12:35 UTCJul 22, 13:35 UTC1h 0m
2026-07-21 NDU349 - Jul 21, 22:35 UTCJul 21, 23:25 UTC50m
2026-07-21 NDU349 - Jul 21, 18:40 UTCJul 21, 20:25 UTC1h 45m
2026-07-21 NDU349 - Jul 21, 17:10 UTCJul 21, 17:25 UTC15m
2026-07-21 NDU349 - Jul 21, 15:40 UTCJul 21, 16:20 UTC40m
2026-07-21 NDU349 AZA → AZA Jul 21, 12:55 UTCJul 21, 14:25 UTC1h 30m
2026-07-20 NDU349 - Jul 20, 22:20 UTCJul 21, 00:20 UTC1h 59m
2026-07-20 NDU349 - Jul 20, 19:00 UTCJul 20, 20:10 UTC1h 10m
2026-07-20 NDU349 AZA → AZA Jul 20, 16:15 UTCJul 20, 17:50 UTC1h 35m
2026-07-20 NDU349 AZA → AZA Jul 20, 13:25 UTCJul 20, 14:50 UTC1h 25m
2026-07-19 NDU349 - Jul 19, 15:15 UTCJul 19, 16:20 UTC1h 5m
2026-07-19 NDU349 - Jul 19, 12:30 UTCJul 19, 13:55 UTC1h 25m
2026-07-18 NDU349 - Jul 18, 16:35 UTCJul 18, 19:40 UTC3h 5m
2026-07-18 NDU349 - Jul 18, 15:10 UTCJul 18, 15:30 UTC20m
2026-07-18 NDU349 AZA → AZA Jul 18, 12:35 UTCJul 18, 13:40 UTC1h 5m
2026-07-17 NDU349 - Jul 17, 13:10 UTCJul 17, 14:55 UTC1h 45m
2026-07-16 NDU349 - Jul 16, 19:50 UTCJul 16, 21:40 UTC1h 50m
2026-07-16 NDU349 - Jul 16, 17:00 UTCJul 16, 18:15 UTC1h 15m
2026-07-16 NDU349 - Jul 16, 14:20 UTCJul 16, 15:49 UTC1h 30m
2026-07-15 NDU349 AZA → AZA Jul 15, 19:20 UTCJul 15, 21:30 UTC2h 10m
2026-07-15 NDU349 - Jul 15, 17:20 UTCJul 15, 17:35 UTC15m
2026-07-15 NDU349 AZA → AZA Jul 15, 15:50 UTCJul 15, 16:25 UTC35m
2026-07-15 NDU349 AZA → AZA Jul 15, 13:10 UTCJul 15, 14:50 UTC1h 40m
2026-07-15 NDU349 - Jul 15, 03:40 UTCJul 15, 04:30 UTC50m
2026-07-15 NDU349 - Jul 15, 00:35 UTCJul 15, 02:15 UTC1h 40m
2026-07-14 NDU349 AZA → AZA Jul 14, 18:25 UTCJul 14, 19:30 UTC1h 5m
2026-07-14 NDU349 AZA → AZA Jul 14, 15:40 UTCJul 14, 16:45 UTC1h 5m
2026-07-14 NDU349 AZA → AZA Jul 14, 13:00 UTCJul 14, 14:25 UTC1h 25m
2026-07-13 NDU349 - Jul 13, 19:25 UTCJul 13, 20:15 UTC50m
2026-07-13 NDU349 - Jul 13, 15:15 UTCJul 13, 16:50 UTC1h 35m
2026-07-13 NDU349 - Jul 13, 12:55 UTCJul 13, 14:20 UTC1h 25m
2026-07-12 NDU349 AZA → AZA Jul 12, 16:55 UTCJul 12, 18:01 UTC1h 5m
2026-07-12 NDU349 AZA → AZA Jul 12, 14:30 UTCJul 12, 15:30 UTC1h 0m
2026-07-11 NDU349 - Jul 11, 18:35 UTCJul 11, 19:30 UTC55m
2026-07-11 NDU349 - Jul 11, 15:25 UTCJul 11, 16:55 UTC1h 30m
2026-07-11 NDU349 - Jul 11, 12:30 UTCJul 11, 14:05 UTC1h 35m
2026-07-11 NDU349 - Jul 11, 04:20 UTCJul 11, 04:55 UTC35m
2026-07-10 NDU349 - Jul 10, 20:30 UTCJul 10, 22:40 UTC2h 10m
2026-07-10 NDU349 - Jul 10, 17:15 UTCJul 10, 18:30 UTC1h 15m
2026-07-10 NDU349 - Jul 10, 13:45 UTCJul 10, 15:15 UTC1h 30m
2026-07-10 NDU349 - Jul 10, 03:45 UTCJul 10, 05:15 UTC1h 30m
2026-07-10 NDU349 - Jul 10, 01:20 UTCJul 10, 02:50 UTC1h 30m
2026-07-09 NDU349 - Jul 9, 16:25 UTCJul 9, 17:40 UTC1h 15m
2026-07-09 NDU349 AZA → AZA Jul 9, 13:35 UTCJul 9, 15:10 UTC1h 35m
2026-07-09 NDU349 - Jul 9, 04:00 UTCJul 9, 04:25 UTC25m
2026-07-08 NDU349 - Jul 8, 19:45 UTCJul 8, 21:00 UTC1h 15m

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 N349ND page for operator, model, and routing details .

Mode-S A3DFED frequently asked

What is Mode-S code A3DFED?
A3DFED is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N349ND.
Where is Mode-S A3DFED registered?
Mode-S code A3DFED 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 A3DFED broadcasting right now?
No active broadcast right now. Last signal was 19d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A3DFED, octal 50757755, decimal 10,739,693.
What flights does A3DFED operate?
Mode-S A3DFED has broadcast 1 distinct callsign, including NDU349.