Germany was assigned the entire D-block until they lost WW2. The Philippines were assigned DU-DZ and 4D-4I after independence from the US in 1946. Germany lost, then regained some of the D-block later on. They currently are assigned DA-DR.
I had a DU2 ham call quite a few years back.
From the NTC web site:
The NTC assigns prefixes depending on the privileges of the amateur license or for special events:
- Class A (Extra Class) – DU, 4F, 4E
- Class B (General Class) – DV, 4I
- Class C (Technician Class) – DW, 4G
- Class D (Foundation Class) – DY, 4H
- Club Stations - DX, DZ
The former VOA MW transmitter at Poro Point had the call DWVA, but that call was not used on the air.
If there were any call signs assigned to the HF transmitters, I am not aware of them.
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