In response to the trivia question: I'm assuming that it's impossible to find some N wit fewer than 10 digits. In all of my attempts I've received results relating to phone number reverse-lookup sites.

There also seems to be this website which exists just to generate a page full of numbers with any given prefix (defined in the URL):

http://www.qzonecom.com/mobile/maanshan_511556.html

Why?!