Apparatus

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sensors Mode-S transponder

3FF91D

ICAO 24-bit transponder address · allocated to Germany

Currently assigned to D-MCLE · FLIGHT DESIGN CT

Hex
3FF91D
Octal
17774435
Decimal
4,192,541
Country
DE
Tail
D-MCLE
Type
FDCT
No current signal · last broadcast 1d ago
Flights observed
80
Distinct callsigns
1
Country
DE
Last broadcast
1d ago

Last known position

Most recent position reported by Mode-S 3FF91D.

Country allocation

The ICAO 24-bit address 3FF91D 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
DMCLE - 80 2026-07-21

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-21 DMCLE AAH → AAH Jul 21, 09:10 UTCJul 21, 10:25 UTC1h 15m
2026-07-18 DMCLE - Jul 18, 09:35 UTCJul 18, 12:00 UTC2h 25m
2026-07-15 DMCLE - Jul 15, 07:10 UTCJul 15, 09:25 UTC2h 15m
2026-07-13 DMCLE AAH → AAH Jul 13, 15:35 UTCJul 13, 15:50 UTC15m
2026-07-12 DMCLE - Jul 12, 10:55 UTCJul 12, 11:20 UTC25m
2026-07-12 DMCLE - Jul 12, 10:01 UTCJul 12, 10:40 UTC40m
2026-07-11 DMCLE - Jul 11, 11:10 UTCJul 11, 11:55 UTC45m
2026-07-11 DMCLE - Jul 11, 10:25 UTCJul 11, 10:55 UTC30m
2026-07-11 DMCLE AAH → AAH Jul 11, 07:50 UTCJul 11, 09:05 UTC1h 15m
2026-07-10 DMCLE AAH → AAH Jul 10, 15:15 UTCJul 10, 15:40 UTC25m
2026-07-10 DMCLE AAH → AAH Jul 10, 14:05 UTCJul 10, 15:05 UTC1h 0m
2026-07-09 DMCLE - Jul 9, 16:05 UTCJul 9, 16:25 UTC20m
2026-07-09 DMCLE AAH → AAH Jul 9, 15:10 UTCJul 9, 15:45 UTC35m
2026-07-09 DMCLE - Jul 9, 09:05 UTCJul 9, 09:15 UTC10m
2026-06-27 DMCLE - Jun 27, 11:04 UTCJun 27, 11:30 UTC25m
2026-06-27 DMCLE - Jun 27, 10:19 UTCJun 27, 10:34 UTC15m
2026-06-27 DMCLE AAH → AAH Jun 27, 09:15 UTCJun 27, 09:34 UTC20m
2026-06-26 DMCLE AAH → AAH Jun 26, 11:14 UTCJun 26, 12:34 UTC1h 20m
2026-06-25 DMCLE - Jun 25, 14:50 UTCJun 25, 15:04 UTC15m
2026-06-25 DMCLE AAH → AAH Jun 25, 14:24 UTCJun 25, 14:44 UTC20m
2026-06-22 DMCLE AAH → AAH Jun 22, 13:59 UTCJun 22, 14:19 UTC20m
2026-06-22 DMCLE AAH → AAH Jun 22, 10:49 UTCJun 22, 11:09 UTC20m
2026-06-21 DMCLE - Jun 21, 09:35 UTCJun 21, 11:20 UTC1h 45m
2026-06-20 DMCLE AAH → AGE Jun 20, 13:39 UTCJun 20, 15:54 UTC2h 15m
2026-06-18 DMCLE - Jun 18, 11:55 UTCJun 18, 12:40 UTC45m
2026-06-18 DMCLE - Jun 18, 09:55 UTCJun 18, 10:40 UTC45m
2026-06-17 DMCLE - Jun 17, 17:10 UTCJun 17, 18:15 UTC1h 5m
2026-06-17 DMCLE - Jun 17, 15:15 UTCJun 17, 16:00 UTC45m
2026-06-15 DMCLE - Jun 15, 17:15 UTCJun 15, 17:25 UTC10m
2026-06-15 DMCLE - Jun 15, 16:19 UTCJun 15, 16:30 UTC10m
2026-06-15 DMCLE AAH → AAH Jun 15, 15:19 UTCJun 15, 16:15 UTC55m
2026-06-15 DMCLE AAH → AAH Jun 15, 09:25 UTCJun 15, 09:49 UTC25m
2026-06-15 DMCLE - Jun 15, 07:50 UTCJun 15, 09:05 UTC1h 15m
2026-06-06 DMCLE - Jun 6, 10:55 UTCJun 6, 11:19 UTC25m
2026-06-06 DMCLE - Jun 6, 10:00 UTCJun 6, 10:25 UTC25m
2026-06-06 DMCLE - Jun 6, 09:04 UTCJun 6, 09:24 UTC20m
2026-06-06 DMCLE - Jun 6, 08:35 UTCJun 6, 08:45 UTC10m
2026-05-31 DMCLE - May 31, 11:25 UTCMay 31, 11:40 UTC15m
2026-05-31 DMCLE - May 31, 10:40 UTCMay 31, 11:10 UTC30m
2026-05-31 DMCLE - May 31, 09:50 UTCMay 31, 10:15 UTC25m
2026-05-31 DMCLE AAH → AAH May 31, 09:05 UTCMay 31, 09:30 UTC25m
2026-05-31 DMCLE - May 31, 08:35 UTCMay 31, 08:50 UTC15m
2026-05-29 DMCLE - May 29, 10:20 UTCMay 29, 10:35 UTC15m
2026-05-29 DMCLE AAH → AAH May 29, 08:35 UTCMay 29, 09:10 UTC35m
2026-05-28 DMCLE - May 28, 16:20 UTCMay 28, 16:50 UTC30m
2026-05-28 DMCLE - May 28, 15:25 UTCMay 28, 15:55 UTC30m
2026-05-28 DMCLE - May 28, 12:10 UTCMay 28, 12:40 UTC30m
2026-05-28 DMCLE - May 28, 10:55 UTCMay 28, 11:25 UTC30m
2026-05-28 DMCLE - May 28, 10:20 UTCMay 28, 10:40 UTC20m
2026-05-28 DMCLE - May 28, 08:45 UTCMay 28, 09:30 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-MCLE page for operator, model, and routing details .

Mode-S 3FF91D frequently asked

What is Mode-S code 3FF91D?
3FF91D is an ICAO 24-bit transponder address. Allocated to Germany. Assigned to D-MCLE.
Where is Mode-S 3FF91D registered?
Mode-S code 3FF91D is allocated to Germany (DE). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 3FF91D 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 3FF91D, octal 17774435, decimal 4,192,541.
What flights does 3FF91D operate?
Mode-S 3FF91D has broadcast 1 distinct callsign, including DMCLE.