Our filtered site list contains of hundreds of thousands of Web pages. The list of blocked sites updated daily. Sites that are sent in by customers are reviewed by a third party, N2H2, and if they are deemed objectionable they are added to the master database. Each site in that review list is then looked at by N2H2 staff to determine if the site should be blocked. Only about twenty-five percent of reviewed sites are blocked.
New sites appear on the Internet daily.
N2H2, Chorus' partner, has coverage of the Internet that is unmatched in the industry. They have a department whose sole task is to create the block-access lists. Employees work seven days a week reviewing and rating sites. New filter lists are created every day. The lists are downloaded into Chorus' database every evening after midnight.