Services such as 411.com, PeopleSmart, AnyWho and Address.com offer mailing address look-up tools that allow users to find out information about a specific address. The United States Postal Service website also contains a ZIP code tool that enables users to find out the complete ZIP code of a mailing address.
To use the PeopleSmart address look-up tool, a user needs to enter a street address along with a city and state, as of April 2015. This loads a page that contains a full listing of all the people ever associated with that address. Each person's entry contains her name along with any variations in spelling, her age, the locations associated with her name and a list of possible relatives. Users are able to add details to a person's entry such as verifying name spellings or deleting entries for people who aren't actually relatives.
The address look-up tool on 411.com functions in a similar fashion, with added fields to enter a specific name, a business name or phone number with an address. Search results on the site contain listings for people associated with that address along with a map of the area and listings for people who live or have lived near that address.