Apparatus

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sensors Mode-S transponder

3D397B

ICAO 24-bit transponder address · allocated to Germany

Currently assigned to D-EUAD · BRM AERO Bristell B23

Hex
3D397B
Octal
17234573
Decimal
4,012,411
Country
DE
Tail
D-EUAD
Type
BR23
No current signal · last broadcast 2d ago
Flights observed
101
Distinct callsigns
1
Country
DE
Last broadcast
2d ago

Last known position

Most recent position reported by Mode-S 3D397B.

Country allocation

The ICAO 24-bit address 3D397B 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
DEUAD - 101 2026-07-19

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-19 DEUAD - Jul 19, 15:25 UTCJul 19, 16:25 UTC1h 0m
2026-07-19 DEUAD - Jul 19, 13:40 UTCJul 19, 14:15 UTC35m
2026-07-16 DEUAD - Jul 16, 08:35 UTCJul 16, 09:10 UTC35m
2026-07-13 DEUAD - Jul 13, 09:55 UTCJul 13, 10:20 UTC25m
2026-07-12 DEUAD - Jul 12, 12:30 UTCJul 12, 12:45 UTC15m
2026-07-12 DEUAD - Jul 12, 09:40 UTCJul 12, 11:15 UTC1h 35m
2026-07-11 DEUAD - Jul 11, 12:45 UTCJul 11, 12:50 UTC5m
2026-07-11 DEUAD - Jul 11, 12:10 UTCJul 11, 12:15 UTC5m
2026-07-10 DEUAD - Jul 10, 13:10 UTCJul 10, 14:35 UTC1h 25m
2026-07-10 DEUAD - Jul 10, 11:15 UTCJul 10, 12:30 UTC1h 15m
2026-07-10 DEUAD - Jul 10, 07:10 UTCJul 10, 10:30 UTC3h 20m
2026-07-04 DEUAD - Jul 4, 08:30 UTCJul 4, 09:40 UTC1h 10m
2026-07-03 DEUAD - Jul 3, 14:30 UTCJul 3, 16:05 UTC1h 35m
2026-07-03 DEUAD - Jul 3, 10:50 UTCJul 3, 12:00 UTC1h 10m
2026-07-03 DEUAD - Jul 3, 08:30 UTCJul 3, 09:05 UTC35m
2026-06-28 DEUAD - Jun 28, 15:05 UTCJun 28, 16:39 UTC1h 35m
2026-06-28 DEUAD - Jun 28, 12:39 UTCJun 28, 13:55 UTC1h 15m
2026-06-28 DEUAD - Jun 28, 11:45 UTCJun 28, 11:55 UTC10m
2026-06-28 DEUAD - Jun 28, 11:00 UTCJun 28, 11:14 UTC15m
2026-06-23 DEUAD - Jun 23, 12:40 UTCJun 23, 14:49 UTC2h 10m
2026-06-23 DEUAD - Jun 23, 11:24 UTCJun 23, 12:20 UTC55m
2026-06-23 DEUAD - Jun 23, 08:30 UTCJun 23, 09:45 UTC1h 15m
2026-06-23 DEUAD - Jun 23, 07:15 UTCJun 23, 08:09 UTC55m
2026-06-22 DEUAD - Jun 22, 15:40 UTCJun 22, 16:24 UTC45m
2026-06-22 DEUAD - Jun 22, 09:14 UTCJun 22, 10:05 UTC50m
2026-06-21 DEUAD - Jun 21, 14:50 UTCJun 21, 15:40 UTC50m
2026-06-21 DEUAD - Jun 21, 12:44 UTCJun 21, 14:19 UTC1h 35m
2026-06-21 DEUAD - Jun 21, 08:44 UTCJun 21, 11:34 UTC2h 50m
2026-06-21 DEUAD - Jun 21, 07:45 UTCJun 21, 07:59 UTC15m
2026-06-20 DEUAD - Jun 20, 16:05 UTCJun 20, 18:10 UTC2h 5m
2026-06-20 DEUAD - Jun 20, 14:09 UTCJun 20, 14:35 UTC25m
2026-06-20 DEUAD - Jun 20, 09:09 UTCJun 20, 09:34 UTC25m
2026-06-17 DEUAD - Jun 17, 15:05 UTCJun 17, 15:55 UTC50m
2026-06-17 DEUAD - Jun 17, 14:00 UTCJun 17, 14:30 UTC30m
2026-06-17 DEUAD - Jun 17, 12:40 UTCJun 17, 13:15 UTC35m
2026-06-14 DEUAD - Jun 14, 12:25 UTCJun 14, 12:35 UTC10m
2026-06-14 DEUAD - Jun 14, 10:55 UTCJun 14, 11:35 UTC40m
2026-06-14 DEUAD - Jun 14, 08:05 UTCJun 14, 09:55 UTC1h 50m
2026-06-13 DEUAD - Jun 13, 16:10 UTCJun 13, 16:45 UTC35m
2026-06-13 DEUAD - Jun 13, 06:55 UTCJun 13, 07:25 UTC30m
2026-06-11 DEUAD - Jun 11, 13:50 UTCJun 11, 16:15 UTC2h 25m
2026-06-07 DEUAD - Jun 7, 14:50 UTCJun 7, 17:20 UTC2h 30m
2026-06-07 DEUAD - Jun 7, 07:50 UTCJun 7, 10:40 UTC2h 50m
2026-06-06 DEUAD - Jun 6, 15:10 UTCJun 6, 16:20 UTC1h 10m
2026-06-06 DEUAD - Jun 6, 11:55 UTCJun 6, 13:00 UTC1h 5m
2026-06-05 DEUAD - Jun 5, 14:20 UTCJun 5, 14:30 UTC10m
2026-06-05 DEUAD - Jun 5, 12:20 UTCJun 5, 13:20 UTC1h 0m
2026-06-05 DEUAD - Jun 5, 10:25 UTCJun 5, 11:00 UTC35m
2026-05-31 DEUAD - May 31, 09:20 UTCMay 31, 10:00 UTC40m
2026-05-30 DEUAD - May 30, 14:00 UTCMay 30, 14:20 UTC20m

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

Mode-S 3D397B frequently asked

What is Mode-S code 3D397B?
3D397B is an ICAO 24-bit transponder address. Allocated to Germany. Assigned to D-EUAD.
Where is Mode-S 3D397B registered?
Mode-S code 3D397B is allocated to Germany (DE). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 3D397B broadcasting right now?
No active broadcast right now. Last signal was 2d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 3D397B, octal 17234573, decimal 4,012,411.
What flights does 3D397B operate?
Mode-S 3D397B has broadcast 1 distinct callsign, including DEUAD.