Apparatus

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sensors Mode-S transponder

3D291A

ICAO 24-bit transponder address · allocated to Germany

Currently assigned to D-ENUW · DIAMOND DA-40 Club Star

Hex
3D291A
Octal
17224432
Decimal
4,008,218
Country
DE
Tail
D-ENUW
Type
DA40
No current signal · last broadcast 1d ago
Flights observed
144
Distinct callsigns
1
Country
DE
Last broadcast
1d ago

Last known position

Most recent position reported by Mode-S 3D291A.

Country allocation

The ICAO 24-bit address 3D291A falls within the block assigned to Germany (DE) by ICAO Annex 10, Volume III. Every aircraft registered in Germany 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
DENUW - 144 2026-07-26

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 DENUW - Jul 26, 12:50 UTCJul 26, 14:45 UTC1h 55m
2026-07-25 DENUW - Jul 25, 09:20 UTCJul 25, 11:10 UTC1h 50m
2026-07-24 DENUW - Jul 24, 11:40 UTCJul 24, 13:25 UTC1h 45m
2026-07-24 DENUW - Jul 24, 09:45 UTCJul 24, 10:30 UTC45m
2026-07-23 DENUW - Jul 23, 12:05 UTCJul 23, 13:40 UTC1h 35m
2026-07-23 DENUW - Jul 23, 09:10 UTCJul 23, 10:50 UTC1h 40m
2026-07-21 DENUW - Jul 21, 13:55 UTCJul 21, 15:15 UTC1h 20m
2026-07-20 DENUW - Jul 20, 12:30 UTCJul 20, 13:40 UTC1h 10m
2026-07-20 DENUW - Jul 20, 10:40 UTCJul 20, 11:50 UTC1h 10m
2026-07-19 DENUW - Jul 19, 12:35 UTCJul 19, 15:10 UTC2h 35m
2026-07-19 DENUW - Jul 19, 10:05 UTCJul 19, 11:15 UTC1h 10m
2026-07-18 DENUW - Jul 18, 14:05 UTCJul 18, 15:15 UTC1h 10m
2026-07-18 DENUW - Jul 18, 10:10 UTCJul 18, 12:20 UTC2h 10m
2026-07-14 DENUW - Jul 14, 14:05 UTCJul 14, 14:20 UTC15m
2026-07-14 DENUW - Jul 14, 12:35 UTCJul 14, 12:50 UTC15m
2026-07-12 DENUW - Jul 12, 16:25 UTCJul 12, 18:25 UTC2h 0m
2026-07-12 DENUW NUE → NUE Jul 12, 14:01 UTCJul 12, 14:35 UTC35m
2026-07-12 DENUW NUE → NUE Jul 12, 11:10 UTCJul 12, 12:15 UTC1h 5m
2026-07-11 DENUW - Jul 11, 17:15 UTCJul 11, 18:55 UTC1h 40m
2026-07-11 DENUW - Jul 11, 12:55 UTCJul 11, 14:40 UTC1h 45m
2026-07-10 DENUW - Jul 10, 14:10 UTCJul 10, 15:05 UTC55m
2026-07-10 DENUW - Jul 10, 08:50 UTCJul 10, 09:50 UTC1h 0m
2026-07-08 DENUW - Jul 8, 14:20 UTCJul 8, 14:45 UTC25m
2026-07-08 DENUW - Jul 8, 10:20 UTCJul 8, 11:50 UTC1h 30m
2026-07-08 DENUW - Jul 8, 09:35 UTCJul 8, 09:45 UTC10m
2026-07-08 DENUW NUE → JCL Jul 8, 07:45 UTCJul 8, 09:05 UTC1h 20m
2026-07-07 DENUW - Jul 7, 10:25 UTCJul 7, 12:20 UTC1h 55m
2026-07-06 DENUW - Jul 6, 08:45 UTCJul 6, 10:05 UTC1h 20m
2026-07-05 DENUW - Jul 5, 15:20 UTCJul 5, 16:35 UTC1h 15m
2026-07-05 DENUW - Jul 5, 09:10 UTCJul 5, 12:05 UTC2h 55m
2026-07-04 DENUW - Jul 4, 16:50 UTCJul 4, 18:00 UTC1h 10m
2026-07-04 DENUW - Jul 4, 15:15 UTCJul 4, 15:45 UTC30m
2026-07-04 DENUW - Jul 4, 13:35 UTCJul 4, 14:05 UTC30m
2026-07-03 DENUW - Jul 3, 10:55 UTCJul 3, 12:05 UTC1h 10m
2026-07-02 DENUW - Jul 2, 16:35 UTCJul 2, 17:25 UTC50m
2026-07-02 DENUW - Jul 2, 14:30 UTCJul 2, 15:15 UTC45m
2026-07-02 DENUW - Jul 2, 12:30 UTCJul 2, 12:40 UTC10m
2026-07-02 DENUW - Jul 2, 09:40 UTCJul 2, 10:50 UTC1h 10m
2026-07-01 DENUW - Jul 1, 18:20 UTCJul 1, 18:55 UTC35m
2026-07-01 DENUW - Jul 1, 16:15 UTCJul 1, 16:45 UTC30m
2026-06-28 DENUW - Jun 28, 08:39 UTCJun 28, 09:30 UTC50m
2026-06-27 DENUW - Jun 27, 18:35 UTCJun 27, 19:59 UTC1h 25m
2026-06-27 DENUW - Jun 27, 07:19 UTCJun 27, 08:44 UTC1h 25m
2026-06-26 DENUW - Jun 26, 13:04 UTCJun 26, 14:50 UTC1h 45m
2026-06-26 DENUW - Jun 26, 07:24 UTCJun 26, 09:10 UTC1h 45m
2026-06-25 DENUW - Jun 25, 17:39 UTCJun 25, 18:15 UTC35m
2026-06-25 DENUW - Jun 25, 16:14 UTCJun 25, 16:45 UTC30m
2026-06-25 DENUW - Jun 25, 13:00 UTCJun 25, 14:20 UTC1h 20m
2026-06-25 DENUW - Jun 25, 10:25 UTCJun 25, 11:59 UTC1h 35m
2026-06-24 DENUW - Jun 24, 12:30 UTCJun 24, 13:50 UTC1h 20m

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 D-ENUW page for operator, model, and routing details .

Mode-S 3D291A frequently asked

What is Mode-S code 3D291A?
3D291A is an ICAO 24-bit transponder address. Allocated to Germany. Assigned to D-ENUW.
Where is Mode-S 3D291A registered?
Mode-S code 3D291A is allocated to Germany (DE). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 3D291A 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 3D291A, octal 17224432, decimal 4,008,218.
What flights does 3D291A operate?
Mode-S 3D291A has broadcast 1 distinct callsign, including DENUW.