Apparatus

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sensors Mode-S transponder

3E1209

ICAO 24-bit transponder address · allocated to Germany

Currently assigned to D-HYAJ · AIRBUS HELICOPTERS EC-145

Hex
3E1209
Octal
17411011
Decimal
4,067,849
Country
DE
Tail
D-HYAJ
Type
EC45
No current signal · last broadcast 7d ago
Flights observed
538
Distinct callsigns
1
Country
DE
Last broadcast
7d ago

Last known position

Most recent position reported by Mode-S 3E1209.

Country allocation

The ICAO 24-bit address 3E1209 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
CHX77 - 538 2026-07-06

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-06 CHX77 - Jul 6, 12:05 UTCJul 6, 12:20 UTC15m
2026-06-26 CHX77 - Jun 26, 15:49 UTCJun 26, 16:24 UTC35m
2026-06-26 CHX77 - Jun 26, 15:05 UTCJun 26, 15:15 UTC10m
2026-06-26 CHX77 - Jun 26, 14:09 UTCJun 26, 14:29 UTC20m
2026-06-26 CHX77 - Jun 26, 12:59 UTCJun 26, 13:19 UTC20m
2026-06-26 CHX77 - Jun 26, 11:49 UTCJun 26, 12:14 UTC25m
2026-06-26 CHX77 - Jun 26, 11:05 UTCJun 26, 11:14 UTC10m
2026-06-26 CHX77 - Jun 26, 09:59 UTCJun 26, 10:30 UTC30m
2026-06-26 CHX77 - Jun 26, 08:05 UTCJun 26, 08:15 UTC10m
2026-06-26 CHX77 - Jun 26, 06:29 UTCJun 26, 07:20 UTC50m
2026-06-25 CHX77 - Jun 25, 22:14 UTCJun 25, 22:59 UTC45m
2026-06-25 CHX77 - Jun 25, 19:59 UTCJun 25, 20:25 UTC25m
2026-06-25 CHX77 - Jun 25, 18:24 UTCJun 25, 18:39 UTC15m
2026-06-25 CHX77 - Jun 25, 17:20 UTCJun 25, 17:30 UTC10m
2026-06-25 CHX77 - Jun 25, 15:50 UTCJun 25, 16:24 UTC35m
2026-06-25 CHX77 - Jun 25, 12:25 UTCJun 25, 12:35 UTC10m
2026-06-25 CHX77 - Jun 25, 10:55 UTCJun 25, 11:04 UTC10m
2026-06-25 CHX77 - Jun 25, 09:10 UTCJun 25, 09:55 UTC45m
2026-06-25 CHX77 - Jun 25, 07:09 UTCJun 25, 07:19 UTC10m
2026-06-25 CHX77 - Jun 25, 06:05 UTCJun 25, 06:14 UTC10m
2026-06-25 CHX77 - Jun 25, 05:20 UTCJun 25, 05:29 UTC10m
2026-06-24 CHX77 - Jun 24, 19:59 UTCJun 24, 20:09 UTC10m
2026-06-24 CHX77 - Jun 24, 19:00 UTCJun 24, 19:15 UTC15m
2026-06-24 CHX77 - Jun 24, 18:20 UTCJun 24, 18:29 UTC10m
2026-06-24 CHX77 - Jun 24, 16:45 UTCJun 24, 17:05 UTC20m
2026-06-24 CHX77 - Jun 24, 16:05 UTCJun 24, 16:14 UTC10m
2026-06-24 CHX77 - Jun 24, 15:24 UTCJun 24, 15:35 UTC10m
2026-06-24 CHX77 - Jun 24, 14:15 UTCJun 24, 14:29 UTC15m
2026-06-24 CHX77 - Jun 24, 09:55 UTCJun 24, 12:40 UTC2h 45m
2026-06-24 CHX77 - Jun 24, 06:55 UTCJun 24, 08:55 UTC2h 0m
2026-06-23 CHX77 - Jun 23, 22:05 UTCJun 23, 22:19 UTC15m
2026-06-23 CHX77 - Jun 23, 21:05 UTCJun 23, 21:20 UTC15m
2026-06-23 CHX77 - Jun 23, 18:45 UTCJun 23, 18:55 UTC10m
2026-06-23 CHX77 - Jun 23, 17:15 UTCJun 23, 17:44 UTC30m
2026-06-23 CHX77 - Jun 23, 14:04 UTCJun 23, 16:05 UTC2h 0m
2026-06-23 CHX77 - Jun 23, 12:45 UTCJun 23, 13:24 UTC40m
2026-06-23 CHX77 - Jun 23, 10:55 UTCJun 23, 11:35 UTC40m
2026-06-23 CHX77 - Jun 23, 09:05 UTCJun 23, 09:20 UTC15m
2026-06-23 CHX77 - Jun 23, 06:34 UTCJun 23, 06:55 UTC20m
2026-06-22 CHX77 - Jun 22, 21:10 UTCJun 22, 21:30 UTC20m
2026-06-22 CHX77 - Jun 22, 19:44 UTCJun 22, 20:30 UTC45m
2026-06-22 CHX77 - Jun 22, 19:09 UTCJun 22, 19:40 UTC30m
2026-06-22 CHX77 - Jun 22, 18:15 UTCJun 22, 18:24 UTC10m
2026-06-22 CHX77 - Jun 22, 15:14 UTCJun 22, 15:45 UTC30m
2026-06-22 CHX77 - Jun 22, 14:24 UTCJun 22, 14:40 UTC15m
2026-06-22 CHX77 - Jun 22, 11:39 UTCJun 22, 13:35 UTC1h 55m
2026-06-22 CHX77 - Jun 22, 08:19 UTCJun 22, 09:54 UTC1h 35m
2026-06-22 CHX77 - Jun 22, 05:49 UTCJun 22, 07:14 UTC1h 25m
2026-06-21 CHX77 - Jun 21, 17:54 UTCJun 21, 18:04 UTC10m
2026-06-21 CHX77 - Jun 21, 17:10 UTCJun 21, 17:15 UTC5m

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

Mode-S 3E1209 frequently asked

What is Mode-S code 3E1209?
3E1209 is an ICAO 24-bit transponder address. Allocated to Germany. Assigned to D-HYAJ.
Where is Mode-S 3E1209 registered?
Mode-S code 3E1209 is allocated to Germany (DE). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 3E1209 broadcasting right now?
No active broadcast right now. Last signal was 7d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 3E1209, octal 17411011, decimal 4,067,849.
What flights does 3E1209 operate?
Mode-S 3E1209 has broadcast 1 distinct callsign, including CHX77.