What to do with a Delinquent Tax list

[Matt W.]

Hi BP, 

I just received a delinquent tax list from my local county office. The list is 3600+ line items long and provides the registered owner's address, not the local property that is delinquent. Many of the owners are out of state or just listed as an LLC or PO box. The list contains an identification number that I can plug into the county tax website and search out what the actual property address is, however it is not feasible to do all 3600 like that.

My question is, is there a website or software that can A.) Upload the list to and mail all the owners saying I would like to buy their distressed property?...and B.) Narrow down the list to help me focus on certain zip codes, zoning, etc by cross referencing with county tax data so I am not looking at thousands of properties that do not fit my criteria?

I am looking for SFH to buy myself as BRRRR deals, I'm not into wholesaling. I have only a vague notion about "buying lists" or services that send mailers for you. Is that what services like Propstream are for?

Thanks!