Addresses and Phone Numbers
- AddressDoctor: Postal Code Lookup (Worldwide)
- AnyWho (White & Yellow Pages, Reverse Phone Lookup)
- Area Codes (NANPA: NPA Information)
- Canadian Postal Code Lookup
- Country Calling Codes
- Find Your Local Calling Area
- Go Toll Free: the Internet 800 Directory
- Hard to Find 800 Numbers
- Infobel.com (International Phone Books)
- InfoSpace (White & Yellow Pages)
- International Dialing Country/City Codes
- Numberway (International Telephone Numbers)
- Postal Codes (International)
- Switchboard (Business, Person, Reverse Phone Number, Area & Zip Codes)
- Telephone Prefix Locator
- Universal Postal Union (International Postal Codes)
- U. S. Government Telephone and E-mail Directories
- WhitePages.com (People, Businesses, e-Mail, Reverse Lookups, Area & Zip Codes)
- Yahoo People Search
- Yahoo: Phone Numbers and Addresses (Directory of Websites for Area Codes, Addresses, International Dialing Codes, Reverse Lookup, etc.)
- Zip Codes (U.S. Postal Service)
