Yesterday I had a nsn "3669" so I called the number...no answer. I saw a 3696 so I went to the door and called twice, the phone rang both times. So I did an address correction in the board and dr'd it. Check mail in mailbox or if there is a number on the inside the box. Delivered by GPS. Drive down the road scaning pkg at every house. If nobody is home check the resistration in the car. I was wondering if others have some other creative delivering methods to know you are at the right place?