Apparatus

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sensors Mode-S transponder

440261

ICAO 24-bit transponder address · allocated to Austria

Currently assigned to OE-FDI · SHORT Skyvan

Hex
440261
Octal
21001141
Decimal
4,457,057
Country
AT
Tail
OE-FDI
Type
SC7
No current signal · last broadcast 2h ago
Flights observed
6
Distinct callsigns
2
Country
AT
Last broadcast
2h ago

Last known position

Most recent position reported by Mode-S 440261.

Country allocation

The ICAO 24-bit address 440261 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 2 distinct

Callsign Airline Flights Last seen
SABRE1 - 5 2026-04-20
OEFDI - 1 2026-04-19

Recent flights last 6

DateFlightRouteTakeoffLandingDuration
2026-04-20 SABRE1 - Apr 20, 14:05 UTCApr 20, 14:20 UTC15m
2026-04-20 SABRE1 - Apr 20, 13:20 UTCApr 20, 14:00 UTC40m
2026-04-20 SABRE1 - Apr 20, 12:10 UTCApr 20, 12:25 UTC15m
2026-04-20 SABRE1 - Apr 20, 11:45 UTCApr 20, 12:00 UTC15m
2026-04-20 SABRE1 - Apr 20, 11:25 UTCApr 20, 11:40 UTC15m
2026-04-19 OEFDI - Apr 19, 13:50 UTCApr 19, 16:05 UTC2h 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 OE-FDI page for operator, model, and routing details .

Mode-S 440261 frequently asked

What is Mode-S code 440261?
440261 is an ICAO 24-bit transponder address. Allocated to Austria. Assigned to OE-FDI.
Where is Mode-S 440261 registered?
Mode-S code 440261 is allocated to Austria (AT). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 440261 broadcasting right now?
No active broadcast right now. Last signal was 2h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 440261, octal 21001141, decimal 4,457,057.
What flights does 440261 operate?
Mode-S 440261 has broadcast 2 distinct callsigns, including SABRE1, OEFDI.