The SK's phone site has an English version, way on top in small letters. Yes the phone book shows an address but no zip code.www.slovenskaposta.sk
How do you pronounce this surname? Maybe by seeing how you pronouce it I might come up with a spelling.
There are names that no longer exist or only in a female line and thus will not show up in the phone book.
Suchanik and Suchanic' are close in spelling.
Sofilranich might pass for being Sofranic.