Apparatus

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sensors Mode-S transponder

440465

ICAO 24-bit transponder address · allocated to Austria

Currently assigned to OE-HCA · BOMBARDIER BD-100 Challenger 300

Hex
440465
Octal
21002145
Decimal
4,457,573
Country
AT
Tail
OE-HCA
Type
CL30
No current signal · last broadcast 1d ago
Flights observed
124
Distinct callsigns
1
Country
AT
Last broadcast
1d ago

Last known position

Most recent position reported by Mode-S 440465.

Country allocation

The ICAO 24-bit address 440465 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
GDK74A - 124 2026-07-21

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-21 GDK74A - Jul 21, 11:15 UTCJul 21, 13:45 UTC2h 30m
2026-07-21 GDK74A - Jul 21, 04:20 UTCJul 21, 06:25 UTC2h 5m
2026-07-20 GDK74A - Jul 20, 10:30 UTCJul 20, 11:45 UTC1h 15m
2026-07-20 GDK74A JMK → NCE Jul 20, 07:20 UTCJul 20, 09:45 UTC2h 25m
2026-07-20 GDK74A ATH → JMK Jul 20, 06:05 UTCJul 20, 06:30 UTC25m
2026-07-19 GDK74A - Jul 19, 06:25 UTCJul 19, 09:00 UTC2h 35m
2026-07-18 GDK74A - Jul 18, 12:55 UTCJul 18, 15:30 UTC2h 35m
2026-07-18 GDK74A - Jul 18, 10:00 UTCJul 18, 11:40 UTC1h 40m
2026-07-17 GDK74A - Jul 17, 14:15 UTCJul 17, 15:05 UTC50m
2026-07-17 GDK74A - Jul 17, 10:25 UTCJul 17, 12:50 UTC2h 25m
2026-07-17 GDK74A - Jul 17, 06:10 UTCJul 17, 08:15 UTC2h 5m
2026-07-16 GDK74A VIE → NCE Jul 16, 14:45 UTCJul 16, 16:25 UTC1h 40m
2026-07-12 GDK74A - Jul 12, 13:30 UTCJul 12, 14:55 UTC1h 25m
2026-07-12 GDK74A - Jul 12, 07:15 UTCJul 12, 12:20 UTC5h 5m
2026-07-11 GDK74A - Jul 11, 13:10 UTCJul 11, 15:05 UTC1h 55m
2026-07-10 GDK74A OLB → VIE Jul 10, 13:15 UTCJul 10, 14:40 UTC1h 25m
2026-07-09 GDK74A - Jul 9, 15:40 UTCJul 9, 16:25 UTC45m
2026-07-09 GDK74A - Jul 9, 14:10 UTCJul 9, 14:40 UTC30m
2026-07-05 GDK74A - Jul 5, 07:05 UTCJul 5, 07:50 UTC45m
2026-07-04 GDK74A JMK → INN Jul 4, 13:55 UTCJul 4, 16:10 UTC2h 15m
2026-07-04 GDK74A - Jul 4, 11:50 UTCJul 4, 13:10 UTC1h 20m
2026-07-04 GDK74A - Jul 4, 09:10 UTCJul 4, 10:05 UTC55m
2026-07-03 GDK74A - Jul 3, 15:30 UTCJul 3, 16:20 UTC50m
2026-07-03 GDK74A - Jul 3, 13:35 UTCJul 3, 14:25 UTC50m
2026-07-03 GDK74A VIY → PSA Jul 3, 10:55 UTCJul 3, 12:05 UTC1h 10m
2026-07-03 GDK74A BRE → LBG Jul 3, 06:15 UTCJul 3, 07:15 UTC1h 0m
2026-07-02 GDK74A - Jul 2, 13:05 UTCJul 2, 13:45 UTC40m
2026-07-02 GDK74A - Jul 2, 06:55 UTCJul 2, 08:00 UTC1h 5m
2026-07-02 GDK74A - Jul 2, 05:35 UTCJul 2, 06:25 UTC50m
2026-07-01 GDK74A - Jul 1, 09:15 UTCJul 1, 10:20 UTC1h 5m
2026-06-30 GDK74A VIE → CIA Jun 30, 09:25 UTCJun 30, 10:30 UTC1h 5m
2026-06-29 GDK74A - Jun 29, 09:14 UTCJun 29, 10:34 UTC1h 20m
2026-06-29 GDK74A - Jun 29, 06:29 UTCJun 29, 07:40 UTC1h 10m
2026-06-29 GDK74A VIE → MUC Jun 29, 04:20 UTCJun 29, 05:00 UTC40m
2026-06-28 GDK74A - Jun 28, 14:39 UTCJun 28, 16:05 UTC1h 25m
2026-06-28 GDK74A - Jun 28, 11:45 UTCJun 28, 13:49 UTC2h 5m
2026-06-28 GDK74A - Jun 28, 08:50 UTCJun 28, 09:45 UTC55m
2026-06-26 GDK74A VIE → OLB Jun 26, 11:14 UTCJun 26, 12:44 UTC1h 30m
2026-06-25 GDK74A - Jun 25, 14:14 UTCJun 25, 15:44 UTC1h 30m
2026-06-25 GDK74A - Jun 25, 10:50 UTCJun 25, 12:04 UTC1h 15m
2026-06-24 GDK74A - Jun 24, 15:35 UTCJun 24, 16:50 UTC1h 15m
2026-06-24 GDK74A RTM → GVA Jun 24, 13:20 UTCJun 24, 14:29 UTC1h 10m
2026-06-23 GDK74A VIE → RTM Jun 23, 18:25 UTCJun 23, 19:50 UTC1h 25m
2026-06-22 GDK74A VIE → VIE Jun 22, 06:19 UTCJun 22, 14:55 UTC8h 35m
2026-06-21 GDK74A - Jun 21, 16:54 UTCJun 21, 17:29 UTC35m
2026-06-21 GDK74A - Jun 21, 14:34 UTCJun 21, 16:25 UTC1h 50m
2026-06-21 GDK74A - Jun 21, 12:49 UTCJun 21, 13:34 UTC45m
2026-06-18 GDK74A - Jun 18, 15:10 UTCJun 18, 15:55 UTC45m
2026-06-18 GDK74A - Jun 18, 12:20 UTCJun 18, 13:45 UTC1h 25m
2026-06-17 GDK74A - Jun 17, 18:50 UTCJun 17, 19:45 UTC55m

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

Mode-S 440465 frequently asked

What is Mode-S code 440465?
440465 is an ICAO 24-bit transponder address. Allocated to Austria. Assigned to OE-HCA.
Where is Mode-S 440465 registered?
Mode-S code 440465 is allocated to Austria (AT). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 440465 broadcasting right now?
No active broadcast right now. Last signal was 1d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 440465, octal 21002145, decimal 4,457,573.
What flights does 440465 operate?
Mode-S 440465 has broadcast 1 distinct callsign, including GDK74A.