Finding Owner Contact information

[Lynne Hart]

Hi there - what is your favorite tool to find property owner contact information. Especially if they are an entity like an LLC or corporation? I need to do some farming and circle prospecting for specific buildings and be able to contact (not via another postcard) their owners. What types of services or tools do you use to be able to call, text or email? (I do have my own client buyer list, but need to find owners of buildings to which I am not connected)