Web Sites Sharing IP Addresses: Prevalence and Significance, a study by Benjamin Edelman of the Berkman Center for Internet & Society, establishes that “more than 87% of active domain names are found to share their web servers with one or more additional domains, and more than two third of active domain names share their web servers with fifty or more additional domains.” These findings have significant ramifications on large scale efforts to block and censor web content, as well as efforts to do so on a local or state level.