Phone Directories and ZIP Code Information
- Anywho
- PhoneNumber.com
- Reverse Phone Directory
- SuperPages
- Switchboard
- Whitepages
- YellowBook
- Zabasearch
- Zip Code Look Up--United States Post Office's official site
- ZipInfo.com
- Everything about Zip codes anyone would ever want to know can be found at zip.langenberg.com.
- 411.com