Finding Mailbox Address Numbers at Apartments?

Hello i am wanting to direct some mailings to some specific apartment renters in my area. I was wondering if any of you know how to find the mailing address for the apartment so i can sent the whole complex postcards? thanks in advance

What kind of apartment are we talking about? If it’s the type of apartment where all the mailboxes are in a centralized location, all you would need to do is see how many mailboxes there are and just use an mailing address template like

[Street Address], #[Box Number]
[City], [State] [Zip]

Of course, that is assuming all of the apartments are being used. Perhaps I am just misunderstanding the question…

I was thinking the same thing.