Apparatus

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sensors Mode-S transponder

3D13EE

ICAO 24-bit transponder address · allocated to Germany

Currently assigned to D-EFUK · CESSNA 172 Skyhawk

Hex
3D13EE
Octal
17211756
Decimal
4,002,798
Country
DE
Tail
D-EFUK
Type
C172
No current signal · last broadcast 7h ago
Flights observed
42
Distinct callsigns
1
Country
DE
Last broadcast
7h ago

Last known position

Most recent position reported by Mode-S 3D13EE.

Country allocation

The ICAO 24-bit address 3D13EE 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
DEFUK - 42 2026-06-02

Recent flights last 42

DateFlightRouteTakeoffLandingDuration
2026-06-02 DEFUK - Jun 2, 16:15 UTCJun 2, 17:10 UTC55m
2026-05-31 DEFUK - May 31, 09:05 UTCMay 31, 09:45 UTC40m
2026-05-30 DEFUK - May 30, 11:20 UTCMay 30, 11:40 UTC20m
2026-05-30 DEFUK - May 30, 08:05 UTCMay 30, 08:50 UTC45m
2026-05-28 DEFUK - May 28, 15:25 UTCMay 28, 16:05 UTC40m
2026-05-28 DEFUK - May 28, 12:00 UTCMay 28, 13:00 UTC1h 0m
2026-05-26 DEFUK - May 26, 16:10 UTCMay 26, 16:35 UTC25m
2026-05-25 DEFUK - May 25, 15:15 UTCMay 25, 16:15 UTC1h 0m
2026-05-25 DEFUK - May 25, 09:55 UTCMay 25, 10:30 UTC35m
2026-05-25 DEFUK - May 25, 08:20 UTCMay 25, 09:25 UTC1h 5m
2026-05-23 DEFUK - May 23, 08:00 UTCMay 23, 09:20 UTC1h 20m
2026-05-22 DEFUK - May 22, 16:25 UTCMay 22, 16:45 UTC20m
2026-05-22 DEFUK - May 22, 13:25 UTCMay 22, 14:10 UTC45m
2026-05-21 DEFUK - May 21, 08:15 UTCMay 21, 08:30 UTC15m
2026-05-20 DEFUK - May 20, 08:20 UTCMay 20, 09:00 UTC40m
2026-05-19 DEFUK - May 19, 13:50 UTCMay 19, 14:10 UTC20m
2026-05-19 DEFUK - May 19, 12:35 UTCMay 19, 13:00 UTC25m
2026-05-13 DEFUK - May 13, 11:15 UTCMay 13, 11:35 UTC20m
2026-05-10 DEFUK - May 10, 13:40 UTCMay 10, 13:55 UTC15m
2026-05-10 DEFUK - May 10, 12:34 UTCMay 10, 13:10 UTC35m
2026-05-10 DEFUK - May 10, 11:25 UTCMay 10, 12:00 UTC35m
2026-05-10 DEFUK - May 10, 09:00 UTCMay 10, 10:35 UTC1h 35m
2026-05-08 DEFUK - May 8, 15:10 UTCMay 8, 16:00 UTC50m
2026-05-08 DEFUK - May 8, 11:44 UTCMay 8, 12:30 UTC45m
2026-05-08 DEFUK - May 8, 08:55 UTCMay 8, 09:14 UTC20m
2026-05-04 DEFUK - May 4, 14:55 UTCMay 4, 15:50 UTC55m
2026-05-01 DEFUK - May 1, 12:45 UTCMay 1, 13:30 UTC45m
2026-05-01 DEFUK - May 1, 11:15 UTCMay 1, 11:45 UTC30m
2026-05-01 DEFUK - May 1, 10:15 UTCMay 1, 10:40 UTC25m
2026-05-01 DEFUK - May 1, 08:40 UTCMay 1, 09:30 UTC50m
2026-05-01 DEFUK - May 1, 07:35 UTCMay 1, 08:05 UTC30m
2026-04-27 DEFUK - Apr 27, 12:20 UTCApr 27, 12:45 UTC25m
2026-04-26 DEFUK - Apr 26, 11:20 UTCApr 26, 11:30 UTC10m
2026-04-25 DEFUK - Apr 25, 15:30 UTCApr 25, 16:20 UTC50m
2026-04-25 DEFUK - Apr 25, 13:15 UTCApr 25, 13:50 UTC35m
2026-04-24 DEFUK - Apr 24, 08:30 UTCApr 24, 08:50 UTC20m
2026-04-18 DEFUK - Apr 18, 14:05 UTCApr 18, 14:25 UTC20m
2026-04-18 DEFUK - Apr 18, 13:00 UTCApr 18, 13:20 UTC20m
2026-04-18 DEFUK - Apr 18, 12:00 UTCApr 18, 12:20 UTC20m
2026-04-17 DEFUK - Apr 17, 14:45 UTCApr 17, 15:10 UTC24m
2026-04-17 DEFUK - Apr 17, 13:20 UTCApr 17, 13:35 UTC15m
2026-04-17 DEFUK - Apr 17, 12:55 UTCApr 17, 13:15 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-EFUK page for operator, model, and routing details .

Mode-S 3D13EE frequently asked

What is Mode-S code 3D13EE?
3D13EE is an ICAO 24-bit transponder address. Allocated to Germany. Assigned to D-EFUK.
Where is Mode-S 3D13EE registered?
Mode-S code 3D13EE is allocated to Germany (DE). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 3D13EE broadcasting right now?
No active broadcast right now. Last signal was 7h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 3D13EE, octal 17211756, decimal 4,002,798.
What flights does 3D13EE operate?
Mode-S 3D13EE has broadcast 1 distinct callsign, including DEFUK.