Apparatus

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sensors Mode-S transponder

3E781A

ICAO 24-bit transponder address · allocated to Germany

Currently assigned to D-KKRI

Hex
3E781A
Octal
17474032
Decimal
4,093,978
Country
DE
Tail
D-KKRI
Type
GLID
No current signal · last broadcast 4h ago
Flights observed
5
Distinct callsigns
1
Country
DE
Last broadcast
4h ago

Last known position

Most recent position reported by Mode-S 3E781A.

Country allocation

The ICAO 24-bit address 3E781A 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
DKKRI - 5 2026-06-16

Recent flights last 5

DateFlightRouteTakeoffLandingDuration
2026-06-16 DKKRI - Jun 16, 14:30 UTCJun 16, 14:39 UTC10m
2026-06-16 DKKRI - Jun 16, 10:30 UTCJun 16, 11:40 UTC1h 10m
2026-06-15 DKKRI - Jun 15, 10:05 UTCJun 15, 14:15 UTC4h 10m
2026-06-14 DKKRI - Jun 14, 11:35 UTCJun 14, 16:30 UTC4h 55m
2026-06-13 DKKRI - Jun 13, 14:45 UTCJun 13, 17:55 UTC3h 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-KKRI page for operator, model, and routing details .

Mode-S 3E781A frequently asked

What is Mode-S code 3E781A?
3E781A is an ICAO 24-bit transponder address. Allocated to Germany. Assigned to D-KKRI.
Where is Mode-S 3E781A registered?
Mode-S code 3E781A is allocated to Germany (DE). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 3E781A broadcasting right now?
No active broadcast right now. Last signal was 4h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 3E781A, octal 17474032, decimal 4,093,978.
What flights does 3E781A operate?
Mode-S 3E781A has broadcast 1 distinct callsign, including DKKRI.