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You are viewing an outdated report. The latest version of this report was published on March 1st, 2024


    
DNS Site Operator
October 1st, 2006

This report details the names and locations of all DNS servers on the internet, as well as the number of domains that are serviced by these servers. In this fashion, we can discover

  • the number of sites hosted by ISPs
  • the number of sites hosted by hosting companies that use an ISP's facilities, but run their own name servers
  • the number of sites hosted by specialty DNS service providers
  • the organizations that choose to operate their own DNS servers rather than to use those of their ISP/hosting provider.

The survey works by determining each month the authoritative name server for each host (and more accurately, each domain) in our survey. We then count the number of domains hosted on each DNS server.

Search
Curious about the size of a the domain set handled by a particular ISP's name servers? Try searching for the ISP's name server. For example, to find Exodus' name servers, try
exodus.

    

Top 20 by Host Name
The top 20 name servers ranked according to the number of domains handled by each name server, with a name server uniquely identified by its fully qualifed name, are shown below.

Name Server Name   Name Server IP   Domains
dns2.name-services.com  216.52.184.230  182,931
dns1.name-services.com  69.25.142.1  182,881
dns3.name-services.com  63.251.92.193  182,704
dns4.name-services.com  64.74.96.242  182,519
dns5.name-services.com  70.42.37.1  182,498
yns1.yahoo.com  66.218.71.205  96,954
yns2.yahoo.com  216.109.116.20  96,929
dns.technorail.com  62.149.128.2  94,802
dns2.technorail.com  62.149.132.2  94,782
k.root-servers.net  193.0.14.129  89,755
e.root-servers.net  192.203.230.10  89,755
l.root-servers.net  198.32.64.12  89,755
b.root-servers.net  192.228.79.201  89,754
h.root-servers.net  128.63.2.53  89,754
g.root-servers.net  192.112.36.4  89,754
a.root-servers.net  198.41.0.4  89,754
c.root-servers.net  192.33.4.12  89,753
m.root-servers.net  202.12.27.33  89,753
i.root-servers.net  192.36.148.17  89,753
d.root-servers.net  128.8.10.90  89,753

Survey Limitations
Our survey, while having an impressive 24,020,930 sites and 13,857,657 domains in the data set, does not include all web sites and domains. We only include those that we consider active, which, by our definition, means we found the site via a link from somewhere else. Sites not linked by anyone are by definition not included in the survey.

We also actively drop sites out of the survey that fail to respond 3 consecutive months to our HTTP queries. So, while a DNS server might still respond with information for a domain, if there is no active web site that we can reach for the domain in question, then the domain is not included in this survey at all, even if it still has other functioning services (such as email).



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