How to find reliable contact information of Multi-Family or Single-Family Home Owners

[Darien Miller-Gowan]

Overall, I am trying to specifically get phone numbers of owners across my local market in both single-family and large multi-family properties. I have utilized LeadSherpa's Skip Trace tool but have not found it to be awfully reliable. Does anyone know a more reliable way to find phone number information for owners? Fee's or costs are not a problem as I am looking for the best option. Thanks for the help!