Apparatus

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sensors Mode-S transponder

3D23B9

ICAO 24-bit transponder address · allocated to Germany

Currently assigned to D-ELTX · TECNAM P-2008

Hex
3D23B9
Octal
17221671
Decimal
4,006,841
Country
DE
Tail
D-ELTX
Type
P208
No current signal · last broadcast 7d ago
Flights observed
106
Distinct callsigns
1
Country
DE
Last broadcast
7d ago

Last known position

Most recent position reported by Mode-S 3D23B9.

Country allocation

The ICAO 24-bit address 3D23B9 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
DELTX - 106 2026-07-10

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-10 DELTX - Jul 10, 10:40 UTCJul 10, 12:35 UTC1h 55m
2026-07-10 DELTX - Jul 10, 09:35 UTCJul 10, 10:05 UTC30m
2026-07-10 DELTX EUM → EUM Jul 10, 08:05 UTCJul 10, 08:45 UTC40m
2026-07-10 DELTX - Jul 10, 06:45 UTCJul 10, 07:15 UTC30m
2026-07-09 DELTX - Jul 9, 13:40 UTCJul 9, 14:05 UTC25m
2026-07-09 DELTX EUM → EUM Jul 9, 12:00 UTCJul 9, 12:30 UTC30m
2026-07-05 DELTX EUM → EUM Jul 5, 11:45 UTCJul 5, 12:05 UTC20m
2026-07-02 DELTX EUM → EUM Jul 2, 17:15 UTCJul 2, 18:15 UTC1h 0m
2026-07-02 DELTX - Jul 2, 15:30 UTCJul 2, 15:55 UTC25m
2026-07-02 DELTX - Jul 2, 14:00 UTCJul 2, 14:30 UTC30m
2026-06-18 DELTX EUM → EUM Jun 18, 07:10 UTCJun 18, 09:30 UTC2h 20m
2026-06-17 DELTX EUM → EUM Jun 17, 11:00 UTCJun 17, 15:40 UTC4h 40m
2026-06-16 DELTX EUM → EUM Jun 16, 12:30 UTCJun 16, 13:40 UTC1h 10m
2026-06-16 DELTX EUM → EUM Jun 16, 09:50 UTCJun 16, 10:25 UTC35m
2026-06-14 DELTX - Jun 14, 13:15 UTCJun 14, 13:45 UTC30m
2026-06-12 DELTX - Jun 12, 16:00 UTCJun 12, 16:40 UTC40m
2026-06-11 DELTX - Jun 11, 13:20 UTCJun 11, 13:45 UTC25m
2026-06-09 DELTX EUM → EUM Jun 9, 16:45 UTCJun 9, 17:20 UTC35m
2026-06-09 DELTX EUM → EUM Jun 9, 10:45 UTCJun 9, 11:50 UTC1h 5m
2026-06-08 DELTX - Jun 8, 09:10 UTCJun 8, 09:30 UTC20m
2026-06-08 DELTX - Jun 8, 07:50 UTCJun 8, 08:15 UTC25m
2026-06-07 DELTX - Jun 7, 16:30 UTCJun 7, 17:20 UTC50m
2026-06-06 DELTX - Jun 6, 11:45 UTCJun 6, 14:00 UTC2h 15m
2026-06-06 DELTX - Jun 6, 10:20 UTCJun 6, 11:00 UTC40m
2026-06-06 DELTX EUM → EUM Jun 6, 08:30 UTCJun 6, 09:30 UTC1h 0m
2026-06-05 DELTX - Jun 5, 13:50 UTCJun 5, 14:20 UTC30m
2026-06-05 DELTX EUM → EUM Jun 5, 10:30 UTCJun 5, 11:00 UTC30m
2026-06-03 DELTX EUM → EUM Jun 3, 15:50 UTCJun 3, 16:05 UTC15m
2026-06-03 DELTX EUM → EUM Jun 3, 13:40 UTCJun 3, 14:30 UTC50m
2026-06-02 DELTX EUM → EUM Jun 2, 15:05 UTCJun 2, 17:30 UTC2h 25m
2026-06-01 DELTX - Jun 1, 14:55 UTCJun 1, 15:45 UTC50m
2026-05-31 DELTX - May 31, 09:45 UTCMay 31, 11:25 UTC1h 40m
2026-05-30 DELTX EUM → EUM May 30, 16:50 UTCMay 30, 17:25 UTC35m
2026-05-30 DELTX EUM → EUM May 30, 10:50 UTCMay 30, 11:40 UTC50m
2026-05-30 DELTX - May 30, 07:45 UTCMay 30, 09:45 UTC2h 0m
2026-05-29 DELTX BWE → EUM May 29, 10:55 UTCMay 29, 12:15 UTC1h 20m
2026-05-29 DELTX - May 29, 08:55 UTCMay 29, 10:05 UTC1h 10m
2026-05-28 DELTX - May 28, 13:55 UTCMay 28, 15:15 UTC1h 20m
2026-05-27 DELTX - May 27, 11:35 UTCMay 27, 13:00 UTC1h 25m
2026-05-27 DELTX - May 27, 07:05 UTCMay 27, 08:05 UTC1h 0m
2026-05-26 DELTX - May 26, 16:59 UTCMay 26, 17:59 UTC1h 0m
2026-05-26 DELTX IZE → EUM May 26, 12:50 UTCMay 26, 13:15 UTC25m
2026-05-26 DELTX EUM → IZE May 26, 09:04 UTCMay 26, 09:29 UTC25m
2026-05-25 DELTX - May 25, 11:40 UTCMay 25, 12:25 UTC45m
2026-05-24 DELTX - May 24, 11:00 UTCMay 24, 12:30 UTC1h 30m
2026-05-23 DELTX - May 23, 18:00 UTCMay 23, 18:40 UTC40m
2026-05-22 DELTX - May 22, 14:40 UTCMay 22, 15:30 UTC50m
2026-05-22 DELTX EUM → EUM May 22, 13:20 UTCMay 22, 14:00 UTC40m
2026-05-21 DELTX EUM → EUM May 21, 16:25 UTCMay 21, 17:15 UTC50m
2026-05-21 DELTX EUM → EUM May 21, 07:40 UTCMay 21, 09:10 UTC1h 30m

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

Mode-S 3D23B9 frequently asked

What is Mode-S code 3D23B9?
3D23B9 is an ICAO 24-bit transponder address. Allocated to Germany. Assigned to D-ELTX.
Where is Mode-S 3D23B9 registered?
Mode-S code 3D23B9 is allocated to Germany (DE). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 3D23B9 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 3D23B9, octal 17221671, decimal 4,006,841.
What flights does 3D23B9 operate?
Mode-S 3D23B9 has broadcast 1 distinct callsign, including DELTX.