Vacant. House lists

[Don Yacono]

Can someone please tell me  where guys like Kent Clothier and Cameron Dunlap get their hands on vacant house software and turn around and sell it on a monthly subscription basis?

There's another website called the wholesalers tool box that has lists compiled from the USPS . How do they get this information?

Is there a way to compile this data for our local area on our own without  having to purchase subscriptions? How is it done.

Thank you.

Don 

SW Florida