Apparatus

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sensors Mode-S transponder

3D09FE

ICAO 24-bit transponder address · allocated to Germany

Currently assigned to D-ECAO · CESSNA 172 Skyhawk

Hex
3D09FE
Octal
17204776
Decimal
4,000,254
Country
DE
Tail
D-ECAO
Type
C172
No current signal · last broadcast 2d ago
Flights observed
58
Distinct callsigns
1
Country
DE
Last broadcast
2d ago

Last known position

Most recent position reported by Mode-S 3D09FE.

Country allocation

The ICAO 24-bit address 3D09FE 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
DECAO - 58 2026-06-06

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-06-06 DECAO - Jun 6, 14:00 UTCJun 6, 14:40 UTC40m
2026-06-06 DECAO - Jun 6, 12:54 UTCJun 6, 13:15 UTC20m
2026-06-05 DECAO KEL → KEL Jun 5, 16:00 UTCJun 5, 16:40 UTC40m
2026-06-01 DECAO KEL → KEL Jun 1, 07:45 UTCJun 1, 09:00 UTC1h 15m
2026-05-31 DECAO KEL → KEL May 31, 09:55 UTCMay 31, 11:00 UTC1h 5m
2026-05-30 DECAO - May 30, 15:00 UTCMay 30, 16:25 UTC1h 25m
2026-05-30 DECAO - May 30, 10:20 UTCMay 30, 11:25 UTC1h 5m
2026-05-29 DECAO KEL → KEL May 29, 12:50 UTCMay 29, 13:40 UTC50m
2026-05-29 DECAO KEL → KEL May 29, 10:25 UTCMay 29, 11:20 UTC55m
2026-05-27 DECAO KEL → KEL May 27, 10:00 UTCMay 27, 11:15 UTC1h 15m
2026-05-27 DECAO KEL → KEL May 27, 07:30 UTCMay 27, 09:20 UTC1h 50m
2026-05-26 DECAO KEL → KEL May 26, 07:24 UTCMay 26, 08:45 UTC1h 20m
2026-05-25 DECAO HGL → KEL May 25, 08:50 UTCMay 25, 09:40 UTC50m
2026-05-25 DECAO KEL → HGL May 25, 07:10 UTCMay 25, 08:10 UTC1h 0m
2026-05-24 DECAO KEL → KEL May 24, 14:05 UTCMay 24, 14:45 UTC40m
2026-05-24 DECAO KEL → KEL May 24, 12:10 UTCMay 24, 13:15 UTC1h 5m
2026-05-23 DECAO LGO → KEL May 23, 13:20 UTCMay 23, 15:10 UTC1h 50m
2026-05-23 DECAO - May 23, 09:50 UTCMay 23, 11:10 UTC1h 20m
2026-05-23 DECAO - May 23, 07:50 UTCMay 23, 08:35 UTC45m
2026-05-21 DECAO KEL → KEL May 21, 07:35 UTCMay 21, 08:30 UTC55m
2026-05-19 DECAO KEL → KEL May 19, 14:40 UTCMay 19, 15:55 UTC1h 15m
2026-05-17 DECAO KEL → KEL May 17, 15:55 UTCMay 17, 16:30 UTC35m
2026-05-17 DECAO KEL → KEL May 17, 13:55 UTCMay 17, 14:30 UTC35m
2026-05-17 DECAO KEL → KEL May 17, 11:50 UTCMay 17, 12:50 UTC1h 0m
2026-05-17 DECAO KEL → KEL May 17, 08:05 UTCMay 17, 08:55 UTC50m
2026-05-15 DECAO - May 15, 12:00 UTCMay 15, 13:00 UTC1h 0m
2026-05-15 DECAO - May 15, 10:20 UTCMay 15, 11:05 UTC45m
2026-05-15 DECAO KEL → MRW May 15, 08:30 UTCMay 15, 09:15 UTC45m
2026-05-12 DECAO KEL → KEL May 12, 12:35 UTCMay 12, 13:40 UTC1h 5m
2026-05-12 DECAO KEL → KEL May 12, 10:45 UTCMay 12, 11:20 UTC35m
2026-05-12 DECAO KEL → KEL May 12, 07:40 UTCMay 12, 08:20 UTC40m
2026-05-11 DECAO KEL → KEL May 11, 07:45 UTCMay 11, 08:55 UTC1h 10m
2026-05-10 DECAO KEL → KEL May 10, 09:40 UTCMay 10, 10:35 UTC55m
2026-05-09 DECAO - May 9, 15:40 UTCMay 9, 16:10 UTC30m
2026-05-09 DECAO KEL → KEL May 9, 14:10 UTCMay 9, 14:55 UTC45m
2026-05-09 DECAO KEL → KEL May 9, 12:20 UTCMay 9, 13:30 UTC1h 10m
2026-05-09 DECAO KEL → KEL May 9, 08:55 UTCMay 9, 09:50 UTC55m
2026-05-08 DECAO KEL → KEL May 8, 14:00 UTCMay 8, 14:40 UTC40m
2026-05-08 DECAO KEL → KEL May 8, 07:44 UTCMay 8, 09:30 UTC1h 45m
2026-05-07 DECAO KEL → KEL May 7, 14:30 UTCMay 7, 15:35 UTC1h 5m
2026-05-06 DECAO - May 6, 09:45 UTCMay 6, 10:30 UTC45m
2026-05-06 DECAO KEL → MRW May 6, 07:40 UTCMay 6, 08:30 UTC50m
2026-05-04 DECAO - May 4, 10:40 UTCMay 4, 11:50 UTC1h 10m
2026-05-04 DECAO - May 4, 09:25 UTCMay 4, 10:05 UTC40m
2026-05-04 DECAO - May 4, 07:50 UTCMay 4, 08:45 UTC55m
2026-05-02 DECAO KEL → KEL May 2, 11:15 UTCMay 2, 12:45 UTC1h 30m
2026-05-01 DECAO KEL → KEL May 1, 10:55 UTCMay 1, 12:10 UTC1h 15m
2026-04-30 DECAO - Apr 30, 10:20 UTCApr 30, 10:30 UTC10m
2026-04-30 DECAO KEL → KEL Apr 30, 09:15 UTCApr 30, 09:50 UTC35m
2026-04-27 DECAO - Apr 27, 11:50 UTCApr 27, 14:00 UTC2h 10m

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

Mode-S 3D09FE frequently asked

What is Mode-S code 3D09FE?
3D09FE is an ICAO 24-bit transponder address. Allocated to Germany. Assigned to D-ECAO.
Where is Mode-S 3D09FE registered?
Mode-S code 3D09FE is allocated to Germany (DE). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 3D09FE 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 3D09FE, octal 17204776, decimal 4,000,254.
What flights does 3D09FE operate?
Mode-S 3D09FE has broadcast 1 distinct callsign, including DECAO.