Combine data from multiple workbooks into one worksheet based on condition

I have a list of leads that have everything but the phone number and then a list with everything.
List A (lista.csv) has Name, Street, City, Zip, Age
List B (listb.csv) has Phone Number,Name, Street, City, Zip

what I want to have is
List C (listc.csv) Phone Number,Name, Street, City, Zip, Age

so I need a vba or method to have workbook C open List A and scan through list B to match Street & Name and if those two conditions match to take the phone number data from list b and add it to the correct record from list A and save it as List C.

Biggest problem I face is that the lists are HUGE, List A is the list of 1.2 million leads that I need to add phone numbers to, and List B is a list of ALL the residents in a state with their phone numbers.... Working in excel... honestly I don't know how to even compare two files... or for me to create a List C that pulls data from List A and List B (let alone compares them on conditional rules)

e-mail sent

Unfortunately I cannot post live data on the web, the samples were e-mailed to you if you'd like to give it a shot. If not I have a programmer here that is also trying it by creating a database...