Apparatus

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sensors Mode-S transponder

3D1C4E

ICAO 24-bit transponder address · allocated to Germany

Currently assigned to D-EIYW · CESSNA 172 Skyhawk

Hex
3D1C4E
Octal
17216116
Decimal
4,004,942
Country
DE
Tail
D-EIYW
Type
C172
Broadcasting now · callsign DEIYW · 1,300 ft
Flights observed
34
Distinct callsigns
1
Country
DE
Last broadcast
26m ago

Current position

3D1C4E is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address 3D1C4E 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
DEIYW - 34 2026-07-21

Recent flights last 34

DateFlightRouteTakeoffLandingDuration
2026-07-21 DEIYW - Jul 21, 15:00 UTCJul 21, 15:30 UTC30m
2026-07-13 DEIYW - Jul 13, 15:00 UTCJul 13, 16:05 UTC1h 5m
2026-07-04 DEIYW - Jul 4, 11:50 UTCJul 4, 12:55 UTC1h 5m
2026-07-04 DEIYW - Jul 4, 08:45 UTCJul 4, 09:40 UTC55m
2026-07-04 DEIYW - Jul 4, 07:55 UTCJul 4, 08:10 UTC15m
2026-06-28 DEIYW SGE → IGS Jun 28, 06:59 UTCJun 28, 08:44 UTC1h 45m
2026-06-25 DEIYW - Jun 25, 15:34 UTCJun 25, 17:30 UTC1h 55m
2026-06-23 DEIYW - Jun 23, 15:24 UTCJun 23, 16:24 UTC1h 0m
2026-06-21 DEIYW - Jun 21, 07:55 UTCJun 21, 10:09 UTC2h 15m
2026-06-17 DEIYW - Jun 17, 14:55 UTCJun 17, 15:35 UTC40m
2026-06-17 DEIYW MHG → IGS Jun 17, 12:40 UTCJun 17, 14:00 UTC1h 20m
2026-06-17 DEIYW - Jun 17, 08:10 UTCJun 17, 09:40 UTC1h 30m
2026-06-07 DEIYW - Jun 7, 13:15 UTCJun 7, 13:50 UTC35m
2026-06-07 DEIYW - Jun 7, 11:25 UTCJun 7, 11:45 UTC20m
2026-06-07 DEIYW - Jun 7, 09:00 UTCJun 7, 09:50 UTC50m
2026-06-06 DEIYW - Jun 6, 11:30 UTCJun 6, 11:55 UTC25m
2026-06-06 DEIYW - Jun 6, 09:55 UTCJun 6, 10:50 UTC55m
2026-05-24 DEIYW - May 24, 13:50 UTCMay 24, 14:50 UTC1h 0m
2026-05-24 DEIYW - May 24, 07:45 UTCMay 24, 08:55 UTC1h 10m
2026-05-10 DEIYW - May 10, 12:34 UTCMay 10, 12:59 UTC25m
2026-05-05 DEIYW - May 5, 15:50 UTCMay 5, 16:30 UTC40m
2026-05-05 DEIYW RBM → RBM May 5, 12:15 UTCMay 5, 14:40 UTC2h 25m
2026-05-05 DEIYW IGS → RBM May 5, 10:00 UTCMay 5, 10:30 UTC30m
2026-05-01 DEIYW - May 1, 13:40 UTCMay 1, 15:00 UTC1h 20m
2026-05-01 DEIYW - May 1, 09:20 UTCMay 1, 10:15 UTC55m
2026-05-01 DEIYW - May 1, 07:50 UTCMay 1, 08:20 UTC30m
2026-04-30 DEIYW IGS → IGS Apr 30, 11:50 UTCApr 30, 12:15 UTC25m
2026-04-28 DEIYW - Apr 28, 14:35 UTCApr 28, 14:55 UTC20m
2026-04-27 DEIYW - Apr 27, 15:20 UTCApr 27, 16:10 UTC50m
2026-04-25 DEIYW - Apr 25, 11:30 UTCApr 25, 12:50 UTC1h 20m
2026-04-25 DEIYW - Apr 25, 09:10 UTCApr 25, 10:05 UTC55m
2026-04-19 DEIYW - Apr 19, 12:15 UTCApr 19, 12:40 UTC25m
2026-04-18 DEIYW FDH → IGS Apr 18, 14:10 UTCApr 18, 15:45 UTC1h 35m
2026-04-18 DEIYW IGS → FDH Apr 18, 09:45 UTCApr 18, 11:00 UTC1h 15m

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

Mode-S 3D1C4E frequently asked

What is Mode-S code 3D1C4E?
3D1C4E is an ICAO 24-bit transponder address. Allocated to Germany. Assigned to D-EIYW.
Where is Mode-S 3D1C4E registered?
Mode-S code 3D1C4E is allocated to Germany (DE). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 3D1C4E broadcasting right now?
Yes. Mode-S 3D1C4E is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 3D1C4E, octal 17216116, decimal 4,004,942.
What flights does 3D1C4E operate?
Mode-S 3D1C4E has broadcast 1 distinct callsign, including DEIYW.