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
76
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 - 76 2026-06-11

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-06-11 DENUW - Jun 11, 08:45 UTCJun 11, 09:10 UTC25m
2026-06-06 DENUW - Jun 6, 07:50 UTCJun 6, 10:00 UTC2h 10m
2026-06-04 DENUW - Jun 4, 10:20 UTCJun 4, 11:25 UTC1h 5m
2026-06-04 DENUW - Jun 4, 08:50 UTCJun 4, 09:00 UTC10m
2026-06-04 DENUW - Jun 4, 08:00 UTCJun 4, 08:15 UTC15m
2026-06-03 DENUW - Jun 3, 12:55 UTCJun 3, 13:35 UTC40m
2026-06-03 DENUW - Jun 3, 09:20 UTCJun 3, 10:05 UTC45m
2026-06-02 DENUW NRD → WVN Jun 2, 12:55 UTCJun 2, 13:25 UTC30m
2026-06-02 DENUW - Jun 2, 10:00 UTCJun 2, 10:30 UTC30m
2026-06-02 DENUW WVN → HGL Jun 2, 09:00 UTCJun 2, 09:30 UTC30m
2026-06-01 DENUW - Jun 1, 15:05 UTCJun 1, 15:45 UTC40m
2026-06-01 DENUW - Jun 1, 09:25 UTCJun 1, 11:15 UTC1h 50m
2026-05-30 DENUW - May 30, 15:00 UTCMay 30, 16:15 UTC1h 15m
2026-05-30 DENUW GCI → FKB May 30, 08:40 UTCMay 30, 13:00 UTC4h 20m
2026-05-29 DENUW - May 29, 08:45 UTCMay 29, 09:40 UTC55m
2026-05-28 DENUW - May 28, 07:25 UTCMay 28, 11:15 UTC3h 50m
2026-05-27 DENUW - May 27, 11:00 UTCMay 27, 12:30 UTC1h 30m
2026-05-27 DENUW - May 27, 10:00 UTCMay 27, 10:25 UTC25m
2026-05-26 DENUW GRZ → GRZ May 26, 10:14 UTCMay 26, 10:44 UTC30m
2026-05-26 DENUW NUE → GRZ May 26, 07:05 UTCMay 26, 09:15 UTC2h 10m
2026-05-25 DENUW - May 25, 16:20 UTCMay 25, 17:35 UTC1h 15m
2026-05-25 DENUW - May 25, 14:05 UTCMay 25, 15:05 UTC1h 0m
2026-05-24 DENUW - May 24, 13:05 UTCMay 24, 13:25 UTC20m
2026-05-24 DENUW - May 24, 10:20 UTCMay 24, 10:50 UTC30m
2026-05-23 DENUW - May 23, 20:35 UTCMay 23, 22:20 UTC1h 45m
2026-05-23 DENUW - May 23, 14:25 UTCMay 23, 14:35 UTC10m
2026-05-23 DENUW - May 23, 12:15 UTCMay 23, 13:25 UTC1h 10m
2026-05-22 DENUW - May 22, 08:55 UTCMay 22, 10:00 UTC1h 5m
2026-05-21 DENUW NUE → NUE May 21, 20:15 UTCMay 21, 21:40 UTC1h 25m
2026-05-21 DENUW - May 21, 11:05 UTCMay 21, 12:30 UTC1h 25m
2026-05-21 DENUW NUE → NUE May 21, 08:45 UTCMay 21, 09:20 UTC35m
2026-05-19 DENUW - May 19, 19:45 UTCMay 19, 19:55 UTC10m
2026-05-19 DENUW - May 19, 14:50 UTCMay 19, 15:25 UTC35m
2026-05-19 DENUW - May 19, 13:20 UTCMay 19, 14:15 UTC55m
2026-05-19 DENUW - May 19, 11:00 UTCMay 19, 12:05 UTC1h 5m
2026-05-19 DENUW - May 19, 09:35 UTCMay 19, 10:00 UTC25m
2026-05-19 DENUW - May 19, 07:00 UTCMay 19, 08:25 UTC1h 25m
2026-05-18 DENUW NUE → NUE May 18, 19:40 UTCMay 18, 20:05 UTC25m
2026-05-18 DENUW - May 18, 16:50 UTCMay 18, 17:40 UTC50m
2026-05-17 DENUW - May 17, 14:45 UTCMay 17, 15:10 UTC25m
2026-05-17 DENUW - May 17, 12:20 UTCMay 17, 13:45 UTC1h 25m
2026-05-09 DENUW - May 9, 13:50 UTCMay 9, 14:15 UTC25m
2026-05-09 DENUW - May 9, 11:45 UTCMay 9, 12:10 UTC25m
2026-05-09 DENUW - May 9, 09:35 UTCMay 9, 10:20 UTC45m
2026-05-08 DENUW - May 8, 15:50 UTCMay 8, 16:50 UTC1h 0m
2026-05-08 DENUW NUE → NUE May 8, 14:05 UTCMay 8, 14:30 UTC25m
2026-05-06 DENUW - May 6, 12:10 UTCMay 6, 12:35 UTC25m
2026-05-06 DENUW - May 6, 10:35 UTCMay 6, 11:20 UTC45m
2026-05-02 DENUW - May 2, 12:50 UTCMay 2, 14:40 UTC1h 50m
2026-05-02 DENUW - May 2, 07:30 UTCMay 2, 09:45 UTC2h 15m

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.