I could monitor DA4XIQ for quite a while on several bands in the past.
The station transmits from JN57LT, which should be quite in my neighbourhood here in JN57DR.

I would like to get in contact with that station, as it puts quite a reasonable signal here over the groundwave on certain bands.

Unfortunately I cannot find any contact data about DA4XIQ, neither postal address nor email.

Can anybody provide me further information on DA4XIQ ?

What is a bit strange:
According to the german radio authority database the call sign is not assigned
(see http://ans.bundesnetzagentur.de/Amateurfunk/Rufzeichen.aspx )