I grew up in a very rural area of the southern U.S. back in the 80s. The internet wasn't quite a thing yet, so my window to the world outside my small town was our mailbox, located at Rural Route Box 464. I had pen pal letters, catalogs, magazines and comic books delivered in the mail and it was pure joy to run down the dusty road and check for something new every day.
The internet became my new window to the world, so it just seemed natural to use "Box464" as my address. Even got the domain!