sensors Mode-S transponder

3DDE7A

ICAO 24-bit transponder address · allocated to Germany

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

Hex
3DDE7A
Octal
17357172
Decimal
4,054,650
Country
DE
Tail
D-HEMS
Type
EC45
Broadcasting now · callsign JOKER24 · 4,725 ft
Flights observed
8
Distinct callsigns
2
Country
DE
Last broadcast
22h ago

Current position

3DDE7A is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address 3DDE7A 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
JOKER47 - 6 2026-04-13
JOKER11 - 2 2026-04-14

Recent flights last 8

DateFlightRouteTakeoffLandingDuration
2026-04-14 JOKER11 - Apr 14, 08:20 UTCApr 14, 08:55 UTC35m
2026-04-14 JOKER11 - Apr 14, 07:00 UTCApr 14, 07:10 UTC10m
2026-04-13 JOKER47 - Apr 13, 12:25 UTCApr 13, 13:00 UTC35m
2026-04-13 JOKER47 - Apr 13, 11:55 UTCApr 13, 13:00 UTC1h 5m
2026-04-13 JOKER47 - Apr 13, 11:05 UTCApr 13, 12:05 UTC1h 0m
2026-04-13 JOKER47 - Apr 13, 08:20 UTCApr 13, 09:00 UTC40m
2026-04-13 JOKER47 - Apr 13, 07:55 UTCApr 13, 09:00 UTC1h 5m
2026-04-13 JOKER47 - Apr 13, 07:40 UTCApr 13, 08:15 UTC35m

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

Mode-S 3DDE7A frequently asked

What is Mode-S code 3DDE7A?
3DDE7A is an ICAO 24-bit transponder address. Allocated to Germany. Assigned to D-HEMS.
Where is Mode-S 3DDE7A registered?
Mode-S code 3DDE7A is allocated to Germany (DE). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 3DDE7A broadcasting right now?
Yes. Mode-S 3DDE7A is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 3DDE7A, octal 17357172, decimal 4,054,650.
What flights does 3DDE7A operate?
Mode-S 3DDE7A has broadcast 2 distinct callsigns, including JOKER47, JOKER11.