Apparatus

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sensors Mode-S transponder

3EFC51

ICAO 24-bit transponder address · allocated to Germany

Currently assigned to D-7098 · Rolladen-Schneider LS4

Hex
3EFC51
Octal
17576121
Decimal
4,127,825
Country
DE
Tail
D-7098
Type
GLID
Broadcasting now · callsign D7098 · 0 ft
Flights observed
22
Distinct callsigns
1
Country
DE
Last broadcast
14d ago

Current position

3EFC51 is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address 3EFC51 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
D7098 - 22 2026-07-23

Recent flights last 22

DateFlightRouteTakeoffLandingDuration
2026-07-23 D7098 - Jul 23, 11:05 UTCJul 23, 17:05 UTC6h 0m
2026-07-22 D7098 - Jul 22, 11:40 UTCJul 22, 13:15 UTC1h 35m
2026-07-20 D7098 - Jul 20, 11:00 UTCJul 20, 11:35 UTC35m
2026-07-19 D7098 - Jul 19, 16:55 UTCJul 19, 17:40 UTC45m
2026-07-19 D7098 - Jul 19, 13:50 UTCJul 19, 14:10 UTC20m
2026-07-16 D7098 - Jul 16, 12:40 UTCJul 16, 16:35 UTC3h 55m
2026-07-16 D7098 - Jul 16, 11:40 UTCJul 16, 12:09 UTC30m
2026-07-14 D7098 - Jul 14, 13:35 UTCJul 14, 14:15 UTC40m
2026-06-21 D7098 - Jun 21, 15:15 UTCJun 21, 16:39 UTC1h 25m
2026-06-21 D7098 - Jun 21, 12:35 UTCJun 21, 12:55 UTC20m
2026-06-06 D7098 - Jun 6, 11:49 UTCJun 6, 12:35 UTC45m
2026-06-06 D7098 - Jun 6, 10:39 UTCJun 6, 11:09 UTC30m
2026-05-17 D7098 - May 17, 13:10 UTCMay 17, 14:30 UTC1h 20m
2026-05-17 D7098 - May 17, 09:15 UTCMay 17, 11:15 UTC2h 0m
2026-05-16 D7098 - May 16, 10:11 UTCMay 16, 11:41 UTC1h 30m
2026-05-09 D7098 - May 9, 15:50 UTCMay 9, 16:55 UTC1h 5m
2026-05-09 D7098 - May 9, 15:00 UTCMay 9, 15:10 UTC10m
2026-05-09 D7098 - May 9, 09:15 UTCMay 9, 09:25 UTC10m
2026-05-03 D7098 - May 3, 14:10 UTCMay 3, 15:35 UTC1h 25m
2026-04-26 D7098 - Apr 26, 15:40 UTCApr 26, 16:25 UTC45m
2026-04-26 D7098 - Apr 26, 09:10 UTCApr 26, 09:50 UTC40m
2026-04-19 D7098 - Apr 19, 14:30 UTCApr 19, 15:35 UTC1h 5m

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-7098 page for operator, model, and routing details .

Mode-S 3EFC51 frequently asked

What is Mode-S code 3EFC51?
3EFC51 is an ICAO 24-bit transponder address. Allocated to Germany. Assigned to D-7098.
Where is Mode-S 3EFC51 registered?
Mode-S code 3EFC51 is allocated to Germany (DE). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 3EFC51 broadcasting right now?
Yes. Mode-S 3EFC51 is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 3EFC51, octal 17576121, decimal 4,127,825.
What flights does 3EFC51 operate?
Mode-S 3EFC51 has broadcast 1 distinct callsign, including D7098.