Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

4401D8

ICAO 24-bit transponder address · allocated to Austria

Currently assigned to OE-XNC · GUIMBAL G-2 Cabri

Hex
4401D8
Octal
21000730
Decimal
4,456,920
Country
AT
Tail
OE-XNC
Type
G2CA
No current signal · last broadcast 12h ago
Flights observed
8
Distinct callsigns
1
Country
AT
Last broadcast
12h ago

Last known position

Most recent position reported by Mode-S 4401D8.

Country allocation

The ICAO 24-bit address 4401D8 falls within the block assigned to Austria (AT) by ICAO Annex 10, Volume III. Every aircraft registered in Austria 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
OEXNC - 8 2026-04-14

Recent flights last 8

DateFlightRouteTakeoffLandingDuration
2026-04-14 OEXNC - Apr 14, 10:10 UTCApr 14, 11:05 UTC55m
2026-04-13 OEXNC - Apr 13, 16:50 UTCApr 13, 17:35 UTC45m
2026-04-13 OEXNC - Apr 13, 14:50 UTCApr 13, 15:55 UTC1h 5m
2026-04-13 OEXNC SZG → SZG Apr 13, 12:40 UTCApr 13, 13:50 UTC1h 10m
2026-04-13 OEXNC - Apr 13, 11:25 UTCApr 13, 11:55 UTC30m
2026-04-13 OEXNC - Apr 13, 09:10 UTCApr 13, 10:15 UTC1h 5m
2026-04-13 OEXNC - Apr 13, 07:50 UTCApr 13, 08:15 UTC25m
2026-04-13 OEXNC - Apr 13, 06:30 UTCApr 13, 06:55 UTC25m

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 OE-XNC page for operator, model, and routing details .

Mode-S 4401D8 frequently asked

What is Mode-S code 4401D8?
4401D8 is an ICAO 24-bit transponder address. Allocated to Austria. Assigned to OE-XNC.
Where is Mode-S 4401D8 registered?
Mode-S code 4401D8 is allocated to Austria (AT). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 4401D8 broadcasting right now?
No active broadcast right now. Last signal was 12h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 4401D8, octal 21000730, decimal 4,456,920.
What flights does 4401D8 operate?
Mode-S 4401D8 has broadcast 1 distinct callsign, including OEXNC.