Apparatus

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sensors Mode-S transponder

3D5F99

ICAO 24-bit transponder address · allocated to Germany

Currently assigned to D-FILL · CESSNA 208 Caravan

Hex
3D5F99
Octal
17257631
Decimal
4,022,169
Country
DE
Tail
D-FILL
Type
C208
No current signal · last broadcast 4d ago
Flights observed
76
Distinct callsigns
1
Country
DE
Last broadcast
4d ago

Last known position

Most recent position reported by Mode-S 3D5F99.

Country allocation

The ICAO 24-bit address 3D5F99 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
DFILL - 76 2026-05-29

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-05-29 DFILL - May 29, 11:15 UTCMay 29, 12:55 UTC1h 40m
2026-05-29 DFILL - May 29, 09:45 UTCMay 29, 10:20 UTC35m
2026-05-29 DFILL - May 29, 08:25 UTCMay 29, 09:05 UTC40m
2026-05-28 DFILL - May 28, 13:10 UTCMay 28, 14:00 UTC50m
2026-05-28 DFILL - May 28, 07:15 UTCMay 28, 07:25 UTC10m
2026-05-28 DFILL - May 28, 06:00 UTCMay 28, 06:20 UTC20m
2026-05-27 DFILL - May 27, 18:30 UTCMay 27, 19:05 UTC35m
2026-05-27 DFILL - May 27, 15:45 UTCMay 27, 15:55 UTC10m
2026-05-27 DFILL - May 27, 07:05 UTCMay 27, 08:00 UTC55m
2026-05-26 DFILL - May 26, 12:14 UTCMay 26, 14:00 UTC1h 45m
2026-05-23 DFILL - May 23, 17:10 UTCMay 23, 18:15 UTC1h 6m
2026-05-23 DFILL - May 23, 15:55 UTCMay 23, 16:15 UTC20m
2026-05-23 DFILL - May 23, 14:55 UTCMay 23, 15:10 UTC15m
2026-05-23 DFILL - May 23, 13:45 UTCMay 23, 14:05 UTC20m
2026-05-23 DFILL - May 23, 12:30 UTCMay 23, 13:05 UTC35m
2026-05-23 DFILL - May 23, 11:25 UTCMay 23, 11:45 UTC20m
2026-05-23 DFILL - May 23, 09:55 UTCMay 23, 10:35 UTC40m
2026-05-23 DFILL - May 23, 08:30 UTCMay 23, 09:10 UTC40m
2026-05-23 DFILL - May 23, 07:35 UTCMay 23, 07:55 UTC20m
2026-05-22 DFILL - May 22, 17:40 UTCMay 22, 17:55 UTC15m
2026-05-22 DFILL - May 22, 15:55 UTCMay 22, 16:55 UTC1h 0m
2026-05-22 DFILL - May 22, 15:05 UTCMay 22, 15:25 UTC20m
2026-05-22 DFILL - May 22, 14:00 UTCMay 22, 14:20 UTC20m
2026-05-22 DFILL - May 22, 12:25 UTCMay 22, 13:25 UTC1h 0m
2026-05-18 DFILL - May 18, 04:45 UTCMay 18, 05:35 UTC50m
2026-05-17 DFILL - May 17, 13:55 UTCMay 17, 14:10 UTC15m
2026-05-17 DFILL - May 17, 12:30 UTCMay 17, 13:05 UTC35m
2026-05-17 DFILL - May 17, 12:10 UTCMay 17, 12:25 UTC15m
2026-05-17 DFILL - May 17, 09:50 UTCMay 17, 11:35 UTC1h 45m
2026-05-17 DFILL - May 17, 08:30 UTCMay 17, 09:15 UTC45m
2026-05-17 DFILL - May 17, 07:10 UTCMay 17, 07:45 UTC35m
2026-05-16 DFILL - May 16, 10:50 UTCMay 16, 11:21 UTC30m
2026-05-16 DFILL - May 16, 09:10 UTCMay 16, 10:01 UTC50m
2026-05-16 DFILL - May 16, 07:55 UTCMay 16, 08:26 UTC30m
2026-05-10 DFILL - May 10, 12:40 UTCMay 10, 13:10 UTC30m
2026-05-10 DFILL - May 10, 11:35 UTCMay 10, 11:50 UTC15m
2026-05-10 DFILL - May 10, 10:10 UTCMay 10, 10:24 UTC15m
2026-05-10 DFILL - May 10, 09:15 UTCMay 10, 09:30 UTC15m
2026-05-10 DFILL - May 10, 08:20 UTCMay 10, 08:30 UTC10m
2026-05-09 DFILL - May 9, 16:50 UTCMay 9, 17:10 UTC20m
2026-05-09 DFILL - May 9, 15:40 UTCMay 9, 15:55 UTC15m
2026-05-09 DFILL - May 9, 14:10 UTCMay 9, 14:40 UTC30m
2026-05-09 DFILL - May 9, 12:35 UTCMay 9, 13:30 UTC55m
2026-05-09 DFILL - May 9, 11:05 UTCMay 9, 12:00 UTC55m
2026-05-09 DFILL - May 9, 09:40 UTCMay 9, 10:30 UTC50m
2026-05-09 DFILL - May 9, 08:30 UTCMay 9, 09:05 UTC35m
2026-05-09 DFILL - May 9, 07:35 UTCMay 9, 07:55 UTC20m
2026-05-08 DFILL - May 8, 16:30 UTCMay 8, 16:50 UTC20m
2026-05-08 DFILL - May 8, 15:10 UTCMay 8, 15:30 UTC20m
2026-05-08 DFILL - May 8, 13:30 UTCMay 8, 14:15 UTC45m

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

Mode-S 3D5F99 frequently asked

What is Mode-S code 3D5F99?
3D5F99 is an ICAO 24-bit transponder address. Allocated to Germany. Assigned to D-FILL.
Where is Mode-S 3D5F99 registered?
Mode-S code 3D5F99 is allocated to Germany (DE). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 3D5F99 broadcasting right now?
No active broadcast right now. Last signal was 4d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 3D5F99, octal 17257631, decimal 4,022,169.
What flights does 3D5F99 operate?
Mode-S 3D5F99 has broadcast 1 distinct callsign, including DFILL.