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You are viewing an outdated report. The latest version of this report was published on November 1st, 2018


    
DNS Site Operator
April 1st, 2007

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
dns4.name-services.com  64.74.96.242  221,846
dns2.name-services.com  216.52.184.230  221,364
dns1.name-services.com  69.25.142.1  221,333
dns5.name-services.com  70.42.37.1  221,261
dns3.name-services.com  63.251.92.193  221,182
yns1.yahoo.com  66.218.71.205  128,915
yns2.yahoo.com  216.109.116.20  128,915
ns8.san.yahoo.com  66.218.71.205  124,686
ns9.san.yahoo.com  216.109.116.20  124,683
dns.technorail.com  62.149.128.2  112,403
dns2.technorail.com  62.149.132.2  112,401
ns1.dreamhost.com  66.33.206.206  100,953
ns2.dreamhost.com  66.201.54.66  100,919
ns3.dreamhost.com  66.33.216.216  97,790
ns.xinnetdns.com  210.51.170.66  86,257
ns.xinnet.cn  210.51.171.209  86,127
ns1.ipowerweb.net  64.70.61.130  85,083
ns2.ipowerweb.net  66.235.217.200  82,068
wsc1.jomax.net  64.202.165.4  81,579
wsc2.jomax.net  68.178.211.104  81,570

Survey Limitations
Our survey, while having an impressive 28,074,454 sites and 15,190,942 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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