Apparatus

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sensors Mode-S transponder

4403C9

ICAO 24-bit transponder address · allocated to Austria

Currently assigned to OE-FWH · CESSNA 510 Citation Mustang

Hex
4403C9
Octal
21001711
Decimal
4,457,417
Country
AT
Tail
OE-FWH
Type
C510
No current signal · last broadcast 6d ago
Flights observed
82
Distinct callsigns
1
Country
AT
Last broadcast
6d ago

Last known position

Most recent position reported by Mode-S 4403C9.

Country allocation

The ICAO 24-bit address 4403C9 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
OEFWH - 82 2026-07-11

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-11 OEFWH - Jul 11, 14:40 UTCJul 11, 17:10 UTC2h 30m
2026-07-11 OEFWH DRS → DRS Jul 11, 13:50 UTCJul 11, 14:00 UTC10m
2026-07-10 OEFWH - Jul 10, 07:15 UTCJul 10, 08:45 UTC1h 30m
2026-07-10 OEFWH - Jul 10, 05:40 UTCJul 10, 06:20 UTC40m
2026-07-09 OEFWH - Jul 9, 17:35 UTCJul 9, 17:45 UTC10m
2026-07-09 OEFWH - Jul 9, 15:55 UTCJul 9, 16:10 UTC15m
2026-07-09 OEFWH - Jul 9, 14:45 UTCJul 9, 15:30 UTC45m
2026-07-09 OEFWH - Jul 9, 06:40 UTCJul 9, 07:20 UTC40m
2026-07-09 OEFWH FDH → FDH Jul 9, 05:50 UTCJul 9, 06:05 UTC15m
2026-07-08 OEFWH MME → FDH Jul 8, 15:10 UTCJul 8, 17:25 UTC2h 15m
2026-07-08 OEFWH - Jul 8, 05:15 UTCJul 8, 07:45 UTC2h 30m
2026-07-08 OEFWH FDH → FDH Jul 8, 04:55 UTCJul 8, 05:10 UTC15m
2026-07-07 OEFWH - Jul 7, 11:35 UTCJul 7, 12:45 UTC1h 10m
2026-07-07 OEFWH HAM → HAM Jul 7, 11:20 UTCJul 7, 11:30 UTC10m
2026-07-07 OEFWH FDH → HAM Jul 7, 05:40 UTCJul 7, 07:05 UTC1h 25m
2026-07-03 OEFWH - Jul 3, 15:30 UTCJul 3, 17:55 UTC2h 25m
2026-07-03 OEFWH IBZ → IBZ Jul 3, 15:00 UTCJul 3, 15:20 UTC20m
2026-07-03 OEFWH - Jul 3, 11:45 UTCJul 3, 13:55 UTC2h 10m
2026-07-03 OEFWH FDH → ACH Jul 3, 09:35 UTCJul 3, 09:40 UTC5m
2026-07-02 OEFWH - Jul 2, 14:35 UTCJul 2, 15:30 UTC55m
2026-07-02 OEFWH - Jul 2, 05:40 UTCJul 2, 06:41 UTC1h 1m
2026-07-02 OEFWH FDH → FDH Jul 2, 04:50 UTCJul 2, 05:30 UTC40m
2026-06-30 OEFWH - Jun 30, 13:00 UTCJun 30, 15:05 UTC2h 5m
2026-06-30 OEFWH - Jun 30, 07:45 UTCJun 30, 09:55 UTC2h 10m
2026-06-28 OEFWH - Jun 28, 14:14 UTCJun 28, 14:54 UTC40m
2026-06-28 OEFWH - Jun 28, 13:29 UTCJun 28, 14:04 UTC35m
2026-06-26 OEFWH - Jun 26, 06:00 UTCJun 26, 06:50 UTC50m
2026-06-22 OEFWH - Jun 22, 11:00 UTCJun 22, 13:14 UTC2h 15m
2026-06-21 OEFWH - Jun 21, 16:44 UTCJun 21, 18:50 UTC2h 5m
2026-06-21 OEFWH - Jun 21, 14:05 UTCJun 21, 14:40 UTC35m
2026-06-21 OEFWH - Jun 21, 12:35 UTCJun 21, 13:20 UTC45m
2026-06-20 OEFWH - Jun 20, 06:49 UTCJun 20, 08:14 UTC1h 25m
2026-06-20 OEFWH - Jun 20, 05:34 UTCJun 20, 06:19 UTC45m
2026-06-12 OEFWH - Jun 12, 16:20 UTCJun 12, 18:30 UTC2h 10m
2026-06-12 OEFWH - Jun 12, 11:35 UTCJun 12, 13:35 UTC2h 0m
2026-06-12 OEFWH - Jun 12, 07:35 UTCJun 12, 08:15 UTC40m
2026-06-12 OEFWH - Jun 12, 07:15 UTCJun 12, 07:30 UTC15m
2026-06-11 OEFWH - Jun 11, 11:45 UTCJun 11, 12:45 UTC1h 0m
2026-06-11 OEFWH - Jun 11, 05:40 UTCJun 11, 07:00 UTC1h 20m
2026-06-11 OEFWH FDH → FDH Jun 11, 05:05 UTCJun 11, 05:25 UTC20m
2026-06-07 OEFWH - Jun 7, 17:50 UTCJun 7, 17:55 UTC5m
2026-06-07 OEFWH - Jun 7, 15:10 UTCJun 7, 17:05 UTC1h 55m
2026-06-04 OEFWH - Jun 4, 14:20 UTCJun 4, 16:30 UTC2h 10m
2026-06-04 OEFWH FDH → ACH Jun 4, 12:40 UTCJun 4, 12:45 UTC5m
2026-06-03 OEFWH DUS → FDH Jun 3, 09:10 UTCJun 3, 10:00 UTC50m
2026-06-03 OEFWH ANR → DUS Jun 3, 05:10 UTCJun 3, 05:40 UTC30m
2026-06-01 OEFWH FDH → ANR Jun 1, 17:10 UTCJun 1, 18:20 UTC1h 10m
2026-06-01 OEFWH FDH → FDH Jun 1, 16:45 UTCJun 1, 17:00 UTC15m
2026-05-27 OEFWH - May 27, 18:50 UTCMay 27, 18:55 UTC5m
2026-05-27 OEFWH - May 27, 16:25 UTCMay 27, 18:35 UTC2h 10m

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

Mode-S 4403C9 frequently asked

What is Mode-S code 4403C9?
4403C9 is an ICAO 24-bit transponder address. Allocated to Austria. Assigned to OE-FWH.
Where is Mode-S 4403C9 registered?
Mode-S code 4403C9 is allocated to Austria (AT). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 4403C9 broadcasting right now?
No active broadcast right now. Last signal was 6d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 4403C9, octal 21001711, decimal 4,457,417.
What flights does 4403C9 operate?
Mode-S 4403C9 has broadcast 1 distinct callsign, including OEFWH.