Help with a Vacant House!!

I wasnt sure what topic to put this post under, so hopefully I will get responses here. I’ve found 2 vacant (atleast they appear to be) homes here in Socal. Now, I need to find the owner, and Ive tried a few “reverse address” search engines with no luck. Anyone have any suggestions of where to go from here? I would like to get the owners contact info ASAP. Any help here would be greatly appreciated! 8)

Tax office to get the owners names then check public records for any information on the owners.