How to contact owner for off market property?

[Emily Allen]

Hello! I'm looking for some advice on effectively and properly contacting owners for off market property. I have mailed out letters based on tax record but got no response. I'm thinking about what else I should do. Two questions:

1.  Is there anyway for me to get phone numbers to contact the owner? And even if there is, should I do that or not? I definitely don't want to be too creepy... 

2. If I can find other properties that under this owner's name, can I wrote to those addresses? Particularly one address seem to be the primary residence. 

Thanks and any advice is greatly appreciated!