How do I get legit phone #'s for the people on my list?

[Robert Wilson]

Hey guys! I bought a list off of melissadata that is made up of property where the owner lives at a different address. I am cold calling these people off of the list. 

However, I can only find phone numbers for about half of them, and I don't even know if they are legit because these mostly go to voicemail. 

I have been using spokeo.com as my main resource for finding phone numbers, but I'm not having much luck. 

Is there a better way to find LEGIT #'s? 

Any help would be much appreciated!! Thanks