A good website on line to find phone numbers is [link removed] . You can also do a reverse phone search. So when someone calls you and you don't know the number you type it in and it tells you where the person lives and who they are.
Well, as Angelee said, you can look in a phone book, or you can use the online whitepages: http://funadvice.com/r/3jtibbjr1o
Or google has a pretty decent phonebook. Just type phonebook: then the person or business.
Look in the phone book.