Research Databases
- ReferenceUSA
- Detailed information on nearly 12 million U.S. companies, organizations, and agencies, and 120 million U.S. households. Search the business database by company name, sales volume, SIC codes, number of employees, product lines, and more. Search the residential database by name, geographical area, or phone number.
Addresses & Phone Numbers
- American Computer Resources
- International Calling Codes list.
- AmeriCom Long Distance Area Decoder
- Look up city, state, or country area codes.
- AnyWho
- Residential (white pages), business (yellow pages), and toll-free directory.
- Cincinnati Bell Yellow Pages
- Find a Cincinnati Business by name, phone number, or keyword.
- gethuman database
- Phone numbers and tips for reaching a real person at popular businesses.
- International Phone Books
- Online Links to international phone books
- The Internet 800 Directory
- If AnyWho, InfoSpace, and Switchboard didn't find an 800 number there's still this toll-free only directory to check.
- LincMad’s Area Codes and Splits
- Explains the area code system, lists recent and upcoming splits and overlays, and includes maps of the area codes.
- Superpages.com
- Residential (white pages), business (yellow pages), and toll-free directory. Also includes a Reverse (Criss-Cross) look-up by address or phone number.
- Switchboard
- Residential (white pages), business (yellow pages), and toll-free directory.
- Toll-Free Numbers and Web Sites of the Airlines
- Directory of toll-free numbers and web sites of the airlines.
- WhoWhere?
- Convenient and powerful site that performs residential searches by name, address or telephone number, and business searches by category, name, proximity to a address, or map location.
Zip & Postal Codes
- Canadian Postal Codes
- The official Canadian Postal Code look-up site.
- ZIP Code Lookup
- Search for zip codes on the United States Postal Service site.
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