Apparatus

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sensors Mode-S transponder

440085

ICAO 24-bit transponder address · allocated to Austria

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

Hex
440085
Octal
21000205
Decimal
4,456,581
Country
AT
Tail
OE-XER
Type
EC35
No current signal · last broadcast 11h ago
Flights observed
388
Distinct callsigns
2
Country
AT
Last broadcast
11h ago

Last known position

Most recent position reported by Mode-S 440085.

Country allocation

The ICAO 24-bit address 440085 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
C18 - 384 2026-07-17
CHRI33 - 4 2026-07-17

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-17 CHRI33 - Jul 17, 15:25 UTCJul 17, 15:40 UTC15m
2026-07-17 CHRI33 - Jul 17, 14:24 UTCJul 17, 14:30 UTC5m
2026-07-17 CHRI33 - Jul 17, 13:25 UTCJul 17, 14:04 UTC40m
2026-07-17 CHRI33 - Jul 17, 12:10 UTCJul 17, 12:35 UTC25m
2026-07-17 C18 - Jul 17, 10:30 UTCJul 17, 10:44 UTC15m
2026-07-17 C18 - Jul 17, 08:45 UTCJul 17, 09:25 UTC40m
2026-07-16 C18 - Jul 16, 18:55 UTCJul 16, 19:45 UTC50m
2026-07-16 C18 - Jul 16, 17:25 UTCJul 16, 17:45 UTC20m
2026-07-16 C18 - Jul 16, 16:25 UTCJul 16, 16:40 UTC15m
2026-07-16 C18 - Jul 16, 12:09 UTCJul 16, 13:00 UTC50m
2026-07-16 C18 - Jul 16, 06:25 UTCJul 16, 07:25 UTC1h 0m
2026-07-15 C18 - Jul 15, 15:05 UTCJul 15, 15:50 UTC45m
2026-07-15 C18 - Jul 15, 14:00 UTCJul 15, 14:10 UTC10m
2026-07-15 C18 - Jul 15, 10:25 UTCJul 15, 11:55 UTC1h 30m
2026-07-14 C18 - Jul 14, 17:50 UTCJul 14, 18:45 UTC55m
2026-07-14 C18 - Jul 14, 13:45 UTCJul 14, 14:00 UTC15m
2026-07-14 C18 - Jul 14, 12:00 UTCJul 14, 13:05 UTC1h 5m
2026-07-14 C18 - Jul 14, 09:35 UTCJul 14, 10:05 UTC30m
2026-07-14 C18 - Jul 14, 08:10 UTCJul 14, 09:00 UTC50m
2026-07-13 C18 - Jul 13, 12:25 UTCJul 13, 12:45 UTC20m
2026-07-13 C18 - Jul 13, 08:20 UTCJul 13, 10:35 UTC2h 15m
2026-07-13 C18 - Jul 13, 06:50 UTCJul 13, 07:35 UTC45m
2026-07-12 C18 - Jul 12, 15:01 UTCJul 12, 15:20 UTC20m
2026-07-12 C18 - Jul 12, 11:05 UTCJul 12, 11:55 UTC50m
2026-07-12 C18 - Jul 12, 05:45 UTCJul 12, 06:15 UTC30m
2026-07-11 C18 - Jul 11, 18:35 UTCJul 11, 19:05 UTC30m
2026-07-11 C18 - Jul 11, 13:50 UTCJul 11, 14:05 UTC15m
2026-07-11 C18 - Jul 11, 12:20 UTCJul 11, 12:50 UTC30m
2026-07-11 C18 - Jul 11, 08:40 UTCJul 11, 09:45 UTC1h 5m
2026-07-10 C18 - Jul 10, 18:10 UTCJul 10, 18:45 UTC35m
2026-07-10 C18 - Jul 10, 16:15 UTCJul 10, 16:50 UTC35m
2026-07-10 C18 - Jul 10, 10:20 UTCJul 10, 10:50 UTC30m
2026-07-10 C18 - Jul 10, 08:05 UTCJul 10, 08:45 UTC40m
2026-07-09 C18 - Jul 9, 18:45 UTCJul 9, 19:35 UTC50m
2026-07-09 C18 - Jul 9, 12:15 UTCJul 9, 12:30 UTC15m
2026-07-09 C18 - Jul 9, 10:45 UTCJul 9, 10:55 UTC10m
2026-07-09 C18 - Jul 9, 08:35 UTCJul 9, 09:15 UTC40m
2026-07-09 C18 - Jul 9, 06:30 UTCJul 9, 07:15 UTC45m
2026-07-08 C18 - Jul 8, 17:20 UTCJul 8, 17:50 UTC30m
2026-07-08 C18 - Jul 8, 14:15 UTCJul 8, 15:05 UTC50m
2026-07-08 C18 - Jul 8, 12:40 UTCJul 8, 13:35 UTC55m
2026-07-08 C18 - Jul 8, 11:15 UTCJul 8, 12:00 UTC45m
2026-07-08 C18 - Jul 8, 09:25 UTCJul 8, 09:45 UTC20m
2026-07-08 C18 - Jul 8, 07:55 UTCJul 8, 08:50 UTC55m
2026-07-07 C18 - Jul 7, 20:20 UTCJul 7, 20:35 UTC15m
2026-07-07 C18 - Jul 7, 19:40 UTCJul 7, 20:00 UTC20m
2026-07-07 C18 - Jul 7, 18:40 UTCJul 7, 18:55 UTC15m
2026-07-07 C18 - Jul 7, 14:00 UTCJul 7, 14:20 UTC20m
2026-07-07 C18 - Jul 7, 10:15 UTCJul 7, 10:55 UTC40m
2026-07-07 C18 - Jul 7, 08:20 UTCJul 7, 09:00 UTC40m

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

Mode-S 440085 frequently asked

What is Mode-S code 440085?
440085 is an ICAO 24-bit transponder address. Allocated to Austria. Assigned to OE-XER.
Where is Mode-S 440085 registered?
Mode-S code 440085 is allocated to Austria (AT). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 440085 broadcasting right now?
No active broadcast right now. Last signal was 11h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 440085, octal 21000205, decimal 4,456,581.
What flights does 440085 operate?
Mode-S 440085 has broadcast 2 distinct callsigns, including C18, CHRI33.