Apparatus

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sensors Mode-S transponder

3D25C1

ICAO 24-bit transponder address · allocated to Germany

Currently assigned to D-EMNX · CESSNA 172 Skyhawk

Hex
3D25C1
Octal
17222701
Decimal
4,007,361
Country
DE
Tail
D-EMNX
Type
C172
No current signal · last broadcast 1d ago
Flights observed
92
Distinct callsigns
1
Country
DE
Last broadcast
1d ago

Last known position

Most recent position reported by Mode-S 3D25C1.

Country allocation

The ICAO 24-bit address 3D25C1 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
DEMNX - 92 2026-07-16

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-16 DEMNX KEL → KEL Jul 16, 13:49 UTCJul 16, 14:35 UTC45m
2026-07-15 DEMNX KEL → KEL Jul 15, 09:20 UTCJul 15, 10:20 UTC1h 0m
2026-07-14 DEMNX KEL → KEL Jul 14, 14:20 UTCJul 14, 15:20 UTC1h 0m
2026-07-13 DEMNX KEL → KEL Jul 13, 14:55 UTCJul 13, 15:55 UTC1h 0m
2026-07-12 DEMNX KEL → KEL Jul 12, 15:20 UTCJul 12, 15:50 UTC30m
2026-07-12 DEMNX - Jul 12, 13:15 UTCJul 12, 13:45 UTC30m
2026-07-12 DEMNX KEL → KEL Jul 12, 12:10 UTCJul 12, 13:05 UTC55m
2026-07-10 DEMNX KEL → KEL Jul 10, 14:00 UTCJul 10, 14:45 UTC45m
2026-07-10 DEMNX KEL → KEL Jul 10, 12:25 UTCJul 10, 12:55 UTC30m
2026-07-09 DEMNX KEL → KEL Jul 9, 14:15 UTCJul 9, 15:05 UTC50m
2026-07-04 DEMNX KEL → KEL Jul 4, 09:15 UTCJul 4, 10:00 UTC45m
2026-06-27 DEMNX KEL → KEL Jun 27, 09:34 UTCJun 27, 09:50 UTC15m
2026-06-27 DEMNX KEL → KEL Jun 27, 08:29 UTCJun 27, 09:15 UTC45m
2026-06-27 DEMNX KEL → KEL Jun 27, 07:15 UTCJun 27, 07:49 UTC35m
2026-06-25 DEMNX - Jun 25, 15:10 UTCJun 25, 15:44 UTC35m
2026-06-25 DEMNX - Jun 25, 11:10 UTCJun 25, 12:30 UTC1h 20m
2026-06-24 DEMNX - Jun 24, 18:25 UTCJun 24, 19:10 UTC45m
2026-06-24 DEMNX - Jun 24, 14:20 UTCJun 24, 14:45 UTC25m
2026-06-23 DEMNX - Jun 23, 17:44 UTCJun 23, 18:39 UTC55m
2026-06-23 DEMNX - Jun 23, 09:29 UTCJun 23, 09:59 UTC30m
2026-06-23 DEMNX KEL → KEL Jun 23, 08:20 UTCJun 23, 09:24 UTC1h 5m
2026-06-22 DEMNX KEL → KEL Jun 22, 08:50 UTCJun 22, 09:24 UTC35m
2026-06-19 DEMNX - Jun 19, 13:44 UTCJun 19, 14:24 UTC40m
2026-06-19 DEMNX KEL → KEL Jun 19, 11:45 UTCJun 19, 12:29 UTC45m
2026-06-16 DEMNX KEL → KEL Jun 16, 12:50 UTCJun 16, 13:34 UTC45m
2026-06-15 DEMNX DTM → KEL Jun 15, 13:45 UTCJun 15, 15:59 UTC2h 15m
2026-06-15 DEMNX KEL → DTM Jun 15, 07:29 UTCJun 15, 09:25 UTC1h 55m
2026-06-11 DEMNX KEL → KEL Jun 11, 15:05 UTCJun 11, 15:50 UTC45m
2026-06-09 DEMNX KEL → KEL Jun 9, 13:10 UTCJun 9, 13:55 UTC45m
2026-06-08 DEMNX KEL → KEL Jun 8, 14:50 UTCJun 8, 15:55 UTC1h 5m
2026-06-08 DEMNX KEL → KEL Jun 8, 09:00 UTCJun 8, 09:25 UTC25m
2026-06-06 DEMNX - Jun 6, 15:25 UTCJun 6, 15:54 UTC30m
2026-06-06 DEMNX KEL → KEL Jun 6, 14:09 UTCJun 6, 14:50 UTC40m
2026-06-02 DEMNX KEL → KEL Jun 2, 14:50 UTCJun 2, 15:45 UTC55m
2026-06-02 DEMNX KEL → KEL Jun 2, 12:35 UTCJun 2, 13:55 UTC1h 20m
2026-06-01 DEMNX KEL → KEL Jun 1, 14:40 UTCJun 1, 15:30 UTC50m
2026-05-28 DEMNX KEL → KEL May 28, 14:20 UTCMay 28, 15:00 UTC40m
2026-05-28 DEMNX KEL → KEL May 28, 11:35 UTCMay 28, 12:20 UTC45m
2026-05-26 DEMNX KEL → KEL May 26, 12:10 UTCMay 26, 12:40 UTC30m
2026-05-25 DEMNX KEL → KEL May 25, 12:05 UTCMay 25, 12:30 UTC25m
2026-05-24 DEMNX HEI → KEL May 24, 12:25 UTCMay 24, 13:20 UTC55m
2026-05-24 DEMNX KEL → HEI May 24, 09:30 UTCMay 24, 10:05 UTC35m
2026-05-22 DEMNX KEL → KEL May 22, 15:05 UTCMay 22, 15:45 UTC40m
2026-05-22 DEMNX KEL → KEL May 22, 12:15 UTCMay 22, 13:15 UTC1h 0m
2026-05-21 DEMNX KEL → KEL May 21, 15:25 UTCMay 21, 15:55 UTC30m
2026-05-21 DEMNX KEL → KEL May 21, 12:15 UTCMay 21, 12:40 UTC25m
2026-05-21 DEMNX KEL → KEL May 21, 09:40 UTCMay 21, 11:05 UTC1h 25m
2026-05-19 DEMNX KEL → KEL May 19, 14:30 UTCMay 19, 15:25 UTC55m
2026-05-17 DEMNX KEL → KEL May 17, 10:35 UTCMay 17, 11:35 UTC1h 0m
2026-05-17 DEMNX KEL → KEL May 17, 08:20 UTCMay 17, 08:45 UTC25m

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

Mode-S 3D25C1 frequently asked

What is Mode-S code 3D25C1?
3D25C1 is an ICAO 24-bit transponder address. Allocated to Germany. Assigned to D-EMNX.
Where is Mode-S 3D25C1 registered?
Mode-S code 3D25C1 is allocated to Germany (DE). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 3D25C1 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 3D25C1, octal 17222701, decimal 4,007,361.
What flights does 3D25C1 operate?
Mode-S 3D25C1 has broadcast 1 distinct callsign, including DEMNX.