We collected 593160 unique webserver names from the Yahoo! and DMOZ.org web directories. Since the names were extracted from web directories instead of being generated automatically, they have been filtered through a preliminary level of human scrutiny. Though it is clear that the level of scrutiny is not extremely high (i.e. there are some spam hostnames in the survey), we believe that these names are representative of the sites people actually care about. We then queried the legacy DNS for these names and recorded the chain of nameservers that are involved in their resolution. We thus obtained a snapshot of the dependencies in the DNS system. A total of 166771 nameservers were discovered in this process. The survey was performed on July 22, 2004.