How to find phone number for owner of property

[Mark Weins]

Hello I am currently looking through a tax lien list for a local county. I see some addresses listed for IRS tax lien properties but have no idea how to get the contact phone numbers for these places so I can contact the owner. Does anyone know of any free skip tracing services where I can find the owner's telephone number by entering their house address?

[Eliott Elias]

Skiptrace them. I use batch Skiptracing.