It is simple to obtain a person's phone number by using 411.com, provided they have a land line. The person's full name, city and state, or zip code are required. It is not possible to obtain a person's cell phone number using this site.
411.com also provides information for businesses. To search, you must fill in the exact name of the business in which you are searching, as well as the city and state or zip code. For instance, searching for a store using generic terms such as "shoe store", will not yield results.
411.com also provides reverse phone number and address look-up features.