LOL, when I was house hunting I actually did rule a house out because it was No. 404 - all I could think when I saw it was "Error!"

Hah!

I don't get it. Can someone please explain?

@Gardenercat

Per Wiki:
"The web site hosting server will typically generate "404 - Not Found" web page, when users attempts to follow a broken or dead link, hence the 404 error is one of the most recognizable errors users can find on the web"

Thank you!

Also In Feng Shui it's not good to have four in your address it signifiy death.

We have a meeting room called 404. :) Here, on the right side:

I missed out on nabbing a great address. 33. It's a Disney thing...

or Rolling Rock...