First offered online in 1997, phone books are now universally available to anyone with internet access.
Property records can be found in many places on the web, including real estate and rental websites.
Online maps and street views are used by over 300,000 web sites, including most online phone books and real estate websites.
Marketing surveys have long provided demographic information that is widely available.
Public profiles from social networks are aggregated from many sources, including search engines.