Apparatus

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sensors Mode-S transponder

3DDC04

ICAO 24-bit transponder address · allocated to Germany

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

Hex
3DDC04
Octal
17356004
Decimal
4,054,020
Country
DE
Tail
D-HDOM
Type
EC45
No current signal · last broadcast Jul 26, 18:20 UTC
Flights observed
250
Distinct callsigns
2
Country
DE
Last broadcast
Jul 26, 18:20 UTC

Last known position

Most recent position reported by Mode-S 3DDC04.

Country allocation

The ICAO 24-bit address 3DDC04 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 2 distinct

Callsign Airline Flights Last seen
CHX75 - 225 2026-07-26
DHDOM - 25 2026-06-29

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 CHX75 - Jul 26, 18:10 UTCJul 26, 18:20 UTC10m
2026-07-26 CHX75 - Jul 26, 17:20 UTCJul 26, 17:40 UTC20m
2026-07-26 CHX75 - Jul 26, 16:15 UTCJul 26, 16:30 UTC15m
2026-07-26 CHX75 - Jul 26, 14:55 UTCJul 26, 15:10 UTC15m
2026-07-26 CHX75 - Jul 26, 14:00 UTCJul 26, 14:10 UTC10m
2026-07-26 CHX75 - Jul 26, 12:55 UTCJul 26, 13:15 UTC20m
2026-07-25 CHX75 - Jul 25, 18:35 UTCJul 25, 18:45 UTC10m
2026-07-25 CHX75 - Jul 25, 17:40 UTCJul 25, 17:55 UTC15m
2026-07-25 CHX75 - Jul 25, 13:35 UTCJul 25, 14:00 UTC25m
2026-07-25 CHX75 - Jul 25, 12:45 UTCJul 25, 12:55 UTC10m
2026-07-25 CHX75 - Jul 25, 11:30 UTCJul 25, 11:55 UTC25m
2026-07-24 CHX75 - Jul 24, 20:55 UTCJul 24, 21:05 UTC10m
2026-07-24 CHX75 - Jul 24, 19:45 UTCJul 24, 20:40 UTC55m
2026-07-24 CHX75 - Jul 24, 16:25 UTCJul 24, 16:35 UTC10m
2026-07-24 CHX75 - Jul 24, 15:30 UTCJul 24, 16:10 UTC40m
2026-07-24 CHX75 CGN → CGN Jul 24, 10:55 UTCJul 24, 11:40 UTC45m
2026-07-24 CHX75 - Jul 24, 09:15 UTCJul 24, 09:55 UTC40m
2026-07-23 CHX75 - Jul 23, 13:05 UTCJul 23, 14:50 UTC1h 45m
2026-07-23 CHX75 - Jul 23, 12:05 UTCJul 23, 12:15 UTC10m
2026-07-23 CHX75 - Jul 23, 09:50 UTCJul 23, 11:30 UTC1h 40m
2026-07-23 CHX75 - Jul 23, 09:15 UTCJul 23, 09:25 UTC10m
2026-07-22 CHX75 - Jul 22, 19:35 UTCJul 22, 20:10 UTC35m
2026-07-22 CHX75 - Jul 22, 14:35 UTCJul 22, 14:40 UTC5m
2026-07-22 CHX75 - Jul 22, 13:25 UTCJul 22, 13:45 UTC20m
2026-07-22 CHX75 - Jul 22, 12:10 UTCJul 22, 12:25 UTC15m
2026-07-21 CHX75 - Jul 21, 17:00 UTCJul 21, 17:55 UTC55m
2026-07-21 CHX75 - Jul 21, 16:25 UTCJul 21, 16:40 UTC15m
2026-07-21 CHX75 - Jul 21, 15:05 UTCJul 21, 15:45 UTC40m
2026-07-21 CHX75 - Jul 21, 13:30 UTCJul 21, 14:15 UTC45m
2026-07-21 CHX75 - Jul 21, 10:45 UTCJul 21, 11:05 UTC20m
2026-07-21 CHX75 - Jul 21, 09:05 UTCJul 21, 09:20 UTC15m
2026-07-21 CHX75 ESS → ESS Jul 21, 08:45 UTCJul 21, 08:50 UTC5m
2026-07-21 CHX75 - Jul 21, 08:05 UTCJul 21, 08:35 UTC30m
2026-07-21 CHX75 - Jul 21, 07:00 UTCJul 21, 07:25 UTC25m
2026-07-21 CHX75 - Jul 21, 06:20 UTCJul 21, 06:45 UTC25m
2026-07-20 CHX75 - Jul 20, 19:45 UTCJul 20, 20:10 UTC25m
2026-07-20 CHX75 - Jul 20, 18:15 UTCJul 20, 19:15 UTC1h 0m
2026-07-20 CHX75 - Jul 20, 17:25 UTCJul 20, 17:35 UTC10m
2026-07-20 CHX75 - Jul 20, 15:35 UTCJul 20, 16:45 UTC1h 10m
2026-07-20 CHX75 - Jul 20, 13:50 UTCJul 20, 14:55 UTC1h 5m
2026-07-19 CHX75 - Jul 19, 13:15 UTCJul 19, 13:30 UTC15m
2026-07-19 CHX75 - Jul 19, 11:55 UTCJul 19, 12:10 UTC15m
2026-07-18 CHX75 - Jul 18, 19:30 UTCJul 18, 19:45 UTC15m
2026-07-18 CHX75 - Jul 18, 17:50 UTCJul 18, 18:30 UTC40m
2026-07-18 CHX75 - Jul 18, 16:50 UTCJul 18, 17:10 UTC20m
2026-07-18 CHX75 - Jul 18, 16:10 UTCJul 18, 16:20 UTC10m
2026-07-18 CHX75 - Jul 18, 13:05 UTCJul 18, 14:00 UTC55m
2026-07-17 CHX75 - Jul 17, 17:40 UTCJul 17, 18:00 UTC20m
2026-07-17 CHX75 - Jul 17, 11:55 UTCJul 17, 12:00 UTC5m
2026-07-17 CHX75 - Jul 17, 11:15 UTCJul 17, 11:45 UTC30m

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

Mode-S 3DDC04 frequently asked

What is Mode-S code 3DDC04?
3DDC04 is an ICAO 24-bit transponder address. Allocated to Germany. Assigned to D-HDOM.
Where is Mode-S 3DDC04 registered?
Mode-S code 3DDC04 is allocated to Germany (DE). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 3DDC04 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 18:20 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 3DDC04, octal 17356004, decimal 4,054,020.
What flights does 3DDC04 operate?
Mode-S 3DDC04 has broadcast 2 distinct callsigns, including CHX75, DHDOM.