Apparatus

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sensors Mode-S transponder

440084

ICAO 24-bit transponder address · allocated to Austria

Currently assigned to OE-XEQ · AIRBUS HELICOPTERS EC-135/635

Hex
440084
Octal
21000204
Decimal
4,456,580
Country
AT
Tail
OE-XEQ
Type
EC35
No current signal · last broadcast 20h ago
Flights observed
13
Distinct callsigns
1
Country
AT
Last broadcast
20h ago

Last known position

Most recent position reported by Mode-S 440084.

Country allocation

The ICAO 24-bit address 440084 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
C33 - 13 2026-04-14

Recent flights last 13

DateFlightRouteTakeoffLandingDuration
2026-04-14 C33 - Apr 14, 07:25 UTCApr 14, 07:50 UTC25m
2026-04-14 C33 - Apr 14, 06:45 UTCApr 14, 07:05 UTC20m
2026-04-13 C33 - Apr 13, 20:10 UTCApr 13, 20:25 UTC15m
2026-04-13 C33 - Apr 13, 19:35 UTCApr 13, 19:45 UTC10m
2026-04-13 C33 - Apr 13, 18:55 UTCApr 13, 19:05 UTC10m
2026-04-13 C33 - Apr 13, 16:15 UTCApr 13, 16:30 UTC15m
2026-04-13 C33 - Apr 13, 15:55 UTCApr 13, 16:15 UTC20m
2026-04-13 C33 - Apr 13, 14:15 UTCApr 13, 14:20 UTC5m
2026-04-13 C33 - Apr 13, 13:20 UTCApr 13, 13:35 UTC15m
2026-04-13 C33 - Apr 13, 11:55 UTCApr 13, 12:05 UTC10m
2026-04-13 C33 - Apr 13, 11:40 UTCApr 13, 12:05 UTC25m
2026-04-13 C33 - Apr 13, 10:50 UTCApr 13, 11:05 UTC15m
2026-04-13 C33 - Apr 13, 09:50 UTCApr 13, 09:55 UTC5m

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-XEQ page for operator, model, and routing details .

Mode-S 440084 frequently asked

What is Mode-S code 440084?
440084 is an ICAO 24-bit transponder address. Allocated to Austria. Assigned to OE-XEQ.
Where is Mode-S 440084 registered?
Mode-S code 440084 is allocated to Austria (AT). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 440084 broadcasting right now?
No active broadcast right now. Last signal was 20h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 440084, octal 21000204, decimal 4,456,580.
What flights does 440084 operate?
Mode-S 440084 has broadcast 1 distinct callsign, including C33.