Phone Book and Directory Websites
Any-Who.com - Search for phone numbers, addresses, people, and businesses.
Switchboard.com - Find businesses, people, zip codes, maps, and directions.
Toll-free Numbers - Search for toll-free numbers for businesses.
U.S. Postal Service - Look for zip codes and package shipping information.
Worldwide Phone Directories - Information, phone numbers, and services for more than 184 countries.