| All Nations Telephone Directory | EscapeArtist Inc. Dialing codes, directories, embassies, voltages, and rates. |
| Anywho | AT&T. Find a person or business. Look for toll free numbers or international as well. |
| Area Codes | Univeristy of California San Diego. Codes listed by state/country. |
| AT&T Toll Free Number Directory | Search by category, keyword, or business name. |
| Canada 411 | Find people and businesses. Over 12 million listings, including postal codes. |
| Infospace.com | Find people and business worldwide using name, address, telephone number, or email, or use reverse lookup. |
| QwestDex | Search for people, business, government agencies, and toll free numbers |
| Reverse Directory | Langenberg. Access eight sites that provide lookup by address and telephone number |
| SuperPages | Verizon. Search for business or people by name, phone number, distance, etc. |
| Telephone Directories on the Web | Buttle & Tuttle Ltd. Detailed index of online phone books. |