Apparatus

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sensors Mode-S transponder

3E05B9

ICAO 24-bit transponder address · allocated to Germany

Currently assigned to D-HTJD · AEROSPATIALE AS-350 Ecureuil

Hex
3E05B9
Octal
17402671
Decimal
4,064,697
Country
DE
Tail
D-HTJD
Type
AS50
No current signal · last broadcast 15h ago
Flights observed
8
Distinct callsigns
1
Country
DE
Last broadcast
15h ago

Last known position

Most recent position reported by Mode-S 3E05B9.

Country allocation

The ICAO 24-bit address 3E05B9 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
DHTJD - 8 2026-04-14

Recent flights last 8

DateFlightRouteTakeoffLandingDuration
2026-04-14 DHTJD - Apr 14, 09:10 UTCApr 14, 09:30 UTC20m
2026-04-14 DHTJD - Apr 14, 07:35 UTCApr 14, 09:05 UTC1h 30m
2026-04-13 DHTJD - Apr 13, 14:25 UTCApr 13, 15:20 UTC55m
2026-04-13 DHTJD - Apr 13, 12:35 UTCApr 13, 14:20 UTC1h 45m
2026-04-13 DHTJD QHU → FLF Apr 13, 09:15 UTCApr 13, 12:00 UTC2h 45m
2026-04-13 DHTJD - Apr 13, 08:20 UTCApr 13, 08:40 UTC20m
2026-04-13 DHTJD - Apr 13, 07:55 UTCApr 13, 08:40 UTC45m
2026-04-13 DHTJD - Apr 13, 06:35 UTCApr 13, 08:15 UTC1h 40m

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

Mode-S 3E05B9 frequently asked

What is Mode-S code 3E05B9?
3E05B9 is an ICAO 24-bit transponder address. Allocated to Germany. Assigned to D-HTJD.
Where is Mode-S 3E05B9 registered?
Mode-S code 3E05B9 is allocated to Germany (DE). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 3E05B9 broadcasting right now?
No active broadcast right now. Last signal was 15h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 3E05B9, octal 17402671, decimal 4,064,697.
What flights does 3E05B9 operate?
Mode-S 3E05B9 has broadcast 1 distinct callsign, including DHTJD.