From the Privacy Rights Clearinghouse, this February 2005 update to their guide, Online Data Brokers: How Consumers Can Opt Out of Directory Assistance and Non-public Information, includes a chart detailing the specific procedure required by 17 free and fee-based websites and services which aggregate and provide access to a range of personal data. Take some time and review the information that these sites maintain on you, and be aware that they do not comprise all available online sources. Also note that unlike the Do-Not-Call Registry, opting out of these websites is not a one time request. As the database content is refreshed throughout the year, ensuring that your information is permanently removed may be an insurmountable challenge.