http://www.technewsdaily.com/8228-facebook-mobile-number-listings.html
" There's no easy way to look up someone's mobile-phone number. White pages? Nope. Directory assistance? Uh-uh.It's something that drives telemarketers and pollsters crazy, as there are millions of people, especially young ones, who don't have any landlines and can't easily be reached by strangers.
But it turns out Facebook has been openly listing mobile numbers all along, as Indian security researcher Suriya Prakash discovered recently."