I'm getting address for out of state. How do I find the owners?!!

[Montana D.]

So I put out a message to my large social media following and got responses from ppl with addresses all over the US. is there one website that can give me the property owners addresses?Because if this keeps happening (ppl sending me addresses of distressed properties all over the US) I would need to have quick source to find these property owner addresses so I can send them letters.