step one? I have found some ugly houses what next

I have found 16 possible house and i have found the owners on the tax rolls but, some of them I am having a hard time with locating their phone numbers to call them with. Please give adive on how I should proceed.


If you do not have a phone number mail the letter to the tax address and hope for a responce it workls for me on some deals that I cant find the phone number for