How to contact property owners?

[Anthony Ives]

Hey there everyone, I've been listening, reading, and watching Bigger Pockets content for quite some time now, but this is my first post on here. I'm still trying to learn how to navigate through the site at this point, so I apologize ahead of time because I'm sure my question has already been asked on here somewhere. I don't own any investment properties at the moment, but I want to finally pull the trigger this year. My local real estate market is pretty dry with less than 20 active listings at any given time according to my realtor, so I have began driving around looking for vacant homes. I made a list of some potential properties, all of which I have found the property owner's name from my county assessor's website. Now, I am at a block. What is the best way to get in touch with these homeowners of these vacant properties? I've tried the most obvious route and went through social media with no luck. Thank you all so much for your time. 

-Anthony