Hard to Find 800 Numbers - Toll-free customer service phone numbers of online retailers, when available. - http://www.hardtofind800numbers.com/
Canada TollFree - Sympatico's online directory of toll free business phone numbers. - http://www.canadatollfree.ca/Search/
National Internet Tollfree Directory - Offers toll free telephone numbers for United States and Canadian businesses with web site links and email addresses. Search by name, key words or heading, or browse categories. - http://www.internettollfree.com/
ATT AnyWho Toll-Free - Search for numbers by business name. - http://www.anywho.com/tf.html
Internet 800 Directory - Toll free listings of businesses by company, number, location and product or service. - http://www.inter800.com/