One of the best websites for finding free phone number listings, as of March 2015, is AnyWho, according to About.com. Other options include Switchboard and Whitepages by Whitepages Inc.
Through these sites, users can find private and business numbers, as well as reverse lookup, zip codes and maps. Private numbers can be searched for through the white pages tab using full name or last name, city, zip code or state. An individual's address can also be used as a search term. Business numbers are supplied through the yellow pages tab, with the business' name or category and location used as search terms.