Apparatus

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sensors Mode-S transponder

440256

ICAO 24-bit transponder address · allocated to Austria

Currently assigned to OE-DTN · CESSNA 172 Skyhawk

Hex
440256
Octal
21001126
Decimal
4,457,046
Country
AT
Tail
OE-DTN
Type
C172
No current signal · last broadcast 7d ago
Flights observed
42
Distinct callsigns
1
Country
AT
Last broadcast
7d ago

Last known position

Most recent position reported by Mode-S 440256.

Country allocation

The ICAO 24-bit address 440256 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
OEDTN - 42 2026-07-22

Recent flights last 42

DateFlightRouteTakeoffLandingDuration
2026-07-22 OEDTN - Jul 22, 16:25 UTCJul 22, 17:10 UTC45m
2026-07-21 OEDTN - Jul 21, 09:15 UTCJul 21, 10:20 UTC1h 5m
2026-07-17 OEDTN - Jul 17, 11:20 UTCJul 17, 12:45 UTC1h 25m
2026-07-17 OEDTN - Jul 17, 09:20 UTCJul 17, 10:25 UTC1h 5m
2026-07-16 OEDTN - Jul 16, 13:54 UTCJul 16, 15:19 UTC1h 25m
2026-07-14 OEDTN - Jul 14, 09:55 UTCJul 14, 10:45 UTC50m
2026-07-14 OEDTN - Jul 14, 08:25 UTCJul 14, 09:25 UTC1h 0m
2026-07-12 OEDTN - Jul 12, 13:50 UTCJul 12, 14:15 UTC25m
2026-07-12 OEDTN - Jul 12, 08:40 UTCJul 12, 10:01 UTC1h 20m
2026-07-11 OEDTN - Jul 11, 16:00 UTCJul 11, 16:45 UTC45m
2026-07-11 OEDTN - Jul 11, 14:00 UTCJul 11, 14:30 UTC30m
2026-07-09 OEDTN - Jul 9, 12:45 UTCJul 9, 13:10 UTC25m
2026-06-28 OEDTN - Jun 28, 11:14 UTCJun 28, 12:25 UTC1h 10m
2026-06-27 OEDTN - Jun 27, 06:50 UTCJun 27, 08:14 UTC1h 25m
2026-06-26 OEDTN - Jun 26, 09:20 UTCJun 26, 13:10 UTC3h 50m
2026-06-25 OEDTN - Jun 25, 11:10 UTCJun 25, 12:54 UTC1h 45m
2026-06-25 OEDTN - Jun 25, 07:39 UTCJun 25, 10:20 UTC2h 40m
2026-06-24 OEDTN - Jun 24, 08:55 UTCJun 24, 10:49 UTC1h 55m
2026-06-23 OEDTN - Jun 23, 06:29 UTCJun 23, 08:15 UTC1h 45m
2026-06-22 OEDTN - Jun 22, 10:40 UTCJun 22, 10:55 UTC15m
2026-06-22 OEDTN - Jun 22, 08:50 UTCJun 22, 09:49 UTC1h 0m
2026-06-11 OEDTN - Jun 11, 12:20 UTCJun 11, 12:35 UTC15m
2026-06-11 OEDTN - Jun 11, 11:10 UTCJun 11, 11:30 UTC20m
2026-05-30 OEDTN - May 30, 11:25 UTCMay 30, 11:45 UTC20m
2026-05-30 OEDTN - May 30, 09:50 UTCMay 30, 10:15 UTC25m
2026-05-23 OEDTN - May 23, 09:15 UTCMay 23, 10:35 UTC1h 20m
2026-05-18 OEDTN - May 18, 09:00 UTCMay 18, 10:05 UTC1h 5m
2026-05-10 OEDTN - May 10, 08:45 UTCMay 10, 09:40 UTC55m
2026-05-10 OEDTN - May 10, 07:25 UTCMay 10, 07:55 UTC30m
2026-05-09 OEDTN - May 9, 07:25 UTCMay 9, 07:55 UTC30m
2026-05-06 OEDTN - May 6, 10:35 UTCMay 6, 11:10 UTC35m
2026-05-03 OEDTN - May 3, 11:10 UTCMay 3, 12:10 UTC1h 0m
2026-05-03 OEDTN - May 3, 08:35 UTCMay 3, 09:10 UTC35m
2026-05-01 OEDTN - May 1, 13:50 UTCMay 1, 15:05 UTC1h 15m
2026-05-01 OEDTN - May 1, 08:20 UTCMay 1, 08:50 UTC30m
2026-04-30 OEDTN - Apr 30, 16:55 UTCApr 30, 17:25 UTC30m
2026-04-30 OEDTN - Apr 30, 13:20 UTCApr 30, 13:55 UTC35m
2026-04-30 OEDTN - Apr 30, 11:15 UTCApr 30, 11:40 UTC25m
2026-04-18 OEDTN - Apr 18, 15:10 UTCApr 18, 15:30 UTC20m
2026-04-18 OEDTN - Apr 18, 12:10 UTCApr 18, 13:50 UTC1h 40m
2026-04-16 OEDTN - Apr 16, 09:10 UTCApr 16, 10:25 UTC1h 15m
2026-04-16 OEDTN - Apr 16, 08:40 UTCApr 16, 09:05 UTC25m

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

Mode-S 440256 frequently asked

What is Mode-S code 440256?
440256 is an ICAO 24-bit transponder address. Allocated to Austria. Assigned to OE-DTN.
Where is Mode-S 440256 registered?
Mode-S code 440256 is allocated to Austria (AT). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 440256 broadcasting right now?
No active broadcast right now. Last signal was 7d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 440256, octal 21001126, decimal 4,457,046.
What flights does 440256 operate?
Mode-S 440256 has broadcast 1 distinct callsign, including OEDTN.