- Zip+4 -- USPS ZIP Code Lookup - input address get ZIP+4, input ZIP get city.
- Language dictionaries and translators - translate English to another language.
- U.S. Postal Services -- Open 24 hrs per day, 7 days per week
- Switchboard.com -- Find an old friend or most anyone else. Find their address, phone number or email address.
- WhoIs Server - find out who owns and administers an Internet domain
Phone Books/Yellow Pages
- U.S. Census Bureau Tiger Mapping Service - a project sponsored by the U.S. Bureau of the Census. The goal of this service is to provide a public resource for generating high-quality, detailed maps of anywhere in the United States, using public geographic data.
- ice Online Data Base - Query Form for the United States and Its Territories.