Again, I have never received anything that could be associated with Pair and they don't have my real home phone number. So, this vector is highly unlikely.
Knowing my specific ISP would take more than 1/100 sec.
I know about the SS# digits. They still took time to do it or it is a real number.
They can't just "put stuff on the site". There is no appropriate ad code there in order for them to do so.
Remember this is someone looking to gain an account with someone who sells banner ads. Therefore, the ads need to be displayed and they are looking to get paid from those ads. However, they have no means of displaying those ads on my site (unless it is some sort of fancy XSS attack or a click-jack or something like that - which is what I'm trying to deduce.). Plus, the ads would be served by the company that called me, not the applicant.