An app called Bless Every Home, which has been backed by some of the biggest names in evangelical circles, is mapping the names and addresses of immigrants and non-Christians.
I've received letters twice from the same individual who belongs to a JW church. The first was when they moved into the area, and the second was when I moved to another place.
Your property ownership records (if you're American) are public records, and if you grab it within like, 3 years (where I live), you can even find the closing price and more detailed information on the sale.