Apparatus

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sensors Mode-S transponder

3D3831

ICAO 24-bit transponder address · allocated to Germany

Currently assigned to D-ETNL · CESSNA 172 Skyhawk

Hex
3D3831
Octal
17234061
Decimal
4,012,081
Country
DE
Tail
D-ETNL
Type
C172
No current signal · last broadcast 1d ago
Flights observed
125
Distinct callsigns
1
Country
DE
Last broadcast
1d ago

Last known position

Most recent position reported by Mode-S 3D3831.

Country allocation

The ICAO 24-bit address 3D3831 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
DETNL - 124 2026-07-16

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-16 DETNL - Jul 16, 15:10 UTCJul 16, 15:55 UTC45m
2026-07-16 DETNL - Jul 16, 13:30 UTCJul 16, 14:05 UTC35m
2026-07-16 DETNL - Jul 16, 12:05 UTCJul 16, 12:25 UTC20m
2026-07-16 DETNL - Jul 16, 11:05 UTCJul 16, 11:25 UTC20m
2026-07-16 DETNL - Jul 16, 09:55 UTCJul 16, 10:15 UTC20m
2026-07-13 DETNL - Jul 13, 14:40 UTCJul 13, 15:15 UTC35m
2026-07-13 DETNL - Jul 13, 13:20 UTCJul 13, 14:00 UTC40m
2026-07-13 DETNL - Jul 13, 12:05 UTCJul 13, 12:35 UTC30m
2026-07-13 DETNL - Jul 13, 10:55 UTCJul 13, 11:25 UTC30m
2026-07-13 DETNL - Jul 13, 08:40 UTCJul 13, 09:50 UTC1h 10m
2026-07-12 DETNL - Jul 12, 14:20 UTCJul 12, 15:01 UTC40m
2026-07-12 DETNL - Jul 12, 12:55 UTCJul 12, 13:30 UTC35m
2026-07-12 DETNL - Jul 12, 11:25 UTCJul 12, 11:50 UTC25m
2026-07-12 DETNL - Jul 12, 10:15 UTCJul 12, 10:35 UTC20m
2026-07-12 DETNL - Jul 12, 08:35 UTCJul 12, 08:45 UTC10m
2026-07-11 DETNL - Jul 11, 15:50 UTCJul 11, 17:20 UTC1h 30m
2026-07-11 DETNL - Jul 11, 06:45 UTCJul 11, 08:10 UTC1h 25m
2026-07-10 DETNL - Jul 10, 15:25 UTCJul 10, 15:35 UTC10m
2026-07-10 DETNL - Jul 10, 12:10 UTCJul 10, 12:50 UTC40m
2026-07-09 DETNL - Jul 9, 13:10 UTCJul 9, 13:35 UTC25m
2026-07-08 DETNL - Jul 8, 14:40 UTCJul 8, 14:55 UTC15m
2026-07-08 DETNL - Jul 8, 13:20 UTCJul 8, 13:35 UTC15m
2026-07-08 DETNL - Jul 8, 11:45 UTCJul 8, 12:10 UTC25m
2026-07-08 DETNL - Jul 8, 10:40 UTCJul 8, 11:10 UTC30m
2026-07-08 DETNL - Jul 8, 09:40 UTCJul 8, 09:55 UTC15m
2026-07-08 DETNL - Jul 8, 08:30 UTCJul 8, 08:40 UTC10m
2026-07-08 DETNL - Jul 8, 07:35 UTCJul 8, 07:50 UTC15m
2026-07-05 DETNL - Jul 5, 13:40 UTCJul 5, 14:15 UTC35m
2026-07-05 DETNL - Jul 5, 07:55 UTCJul 5, 08:40 UTC45m
2026-07-04 DETNL - Jul 4, 10:35 UTCJul 4, 10:50 UTC15m
2026-07-04 DETNL - Jul 4, 09:35 UTCJul 4, 09:50 UTC15m
2026-07-04 DETNL - Jul 4, 08:15 UTCJul 4, 08:35 UTC20m
2026-07-01 DETNL - Jul 1, 15:55 UTCJul 1, 16:30 UTC35m
2026-07-01 DETNL - Jul 1, 13:35 UTCJul 1, 13:55 UTC20m
2026-07-01 DETNL - Jul 1, 12:35 UTCJul 1, 13:05 UTC30m
2026-07-01 DETNL - Jul 1, 11:30 UTCJul 1, 11:40 UTC10m
2026-07-01 DETNL - Jul 1, 10:20 UTCJul 1, 11:00 UTC40m
2026-07-01 DETNL - Jul 1, 08:30 UTCJul 1, 09:35 UTC1h 5m
2026-06-27 DETNL - Jun 27, 11:39 UTCJun 27, 13:09 UTC1h 30m
2026-06-27 DETNL - Jun 27, 08:39 UTCJun 27, 09:44 UTC1h 5m
2026-06-26 DETNL - Jun 26, 14:29 UTCJun 26, 15:34 UTC1h 5m
2026-06-26 DETNL - Jun 26, 07:50 UTCJun 26, 09:05 UTC1h 15m
2026-06-25 DETNL - Jun 25, 11:10 UTCJun 25, 11:44 UTC35m
2026-06-25 DETNL - Jun 25, 09:20 UTCJun 25, 10:04 UTC45m
2026-06-25 DETNL - Jun 25, 08:20 UTCJun 25, 08:40 UTC20m
2026-06-24 DETNL - Jun 24, 15:39 UTCJun 24, 15:59 UTC20m
2026-06-24 DETNL - Jun 24, 11:54 UTCJun 24, 12:34 UTC40m
2026-06-24 DETNL - Jun 24, 08:39 UTCJun 24, 09:24 UTC45m
2026-06-21 DETNL - Jun 21, 13:50 UTCJun 21, 14:24 UTC35m
2026-06-21 DETNL - Jun 21, 10:49 UTCJun 21, 11:00 UTC10m

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

Mode-S 3D3831 frequently asked

What is Mode-S code 3D3831?
3D3831 is an ICAO 24-bit transponder address. Allocated to Germany. Assigned to D-ETNL.
Where is Mode-S 3D3831 registered?
Mode-S code 3D3831 is allocated to Germany (DE). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 3D3831 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 3D3831, octal 17234061, decimal 4,012,081.
What flights does 3D3831 operate?
Mode-S 3D3831 has broadcast 1 distinct callsign, including DETNL.