how to find owners with no address or phone # listed

[Don Washington III]

Hello BP.  I was looking for advice on a situation that I have.  I am trying to get started in RE by wholesaling.  I have found a property that is boarded up and "appears" to be vacant.  I went to the city government site and looked up the information.  I found the name of the owner, and tried to search for their number.  So far I haven't been successful.  On the city's website they provide a mailing address.  However the mailing address that is listed is the same address of the vacant home.  So my question is, is there a way to locate or contact the owner if I can't find their number or the address listed appears to not be valid?

Thanks