As of 2015, a good place to perform a free reverse phone number search is the White Pages site. Reverse phone number searches can provide the name, location and in some cases the name of the phone service provider.
The White Pages site also offers reverse address and business searches. Users can create free accounts to save searches for future use, but it is not required.
Another good site for reverse phone number searches is People Smart. Landline and mobile numbers can be used in searches. The site is updated often to provide accurate search results. Searches are performed anonymously and the searcher's information is not shared with third parties.
Some online reverse phone number searches might not have information about cell phones, but searching through certain social networking sites might produce results since some members have their cellphone numbers listed. To do this, just enter the phone number with the area code in the search box at the top of the page. If a profile with a matching phone number is on the website, it will show that person's page.